Initial commit

node_modules/nodegit/vendor/libgit2/src/CMakeLists.txt

@@ -0,0 +1,396 @@
+IF(DEBUG_POOL)
+	SET(GIT_DEBUG_POOL 1)
+ENDIF()
+ADD_FEATURE_INFO(debugpool GIT_DEBUG_POOL "debug pool allocator")
+
+INCLUDE(PkgBuildConfig)
+
+# This variable will contain the libraries we need to put into
+# libgit2.pc's Requires.private. That is, what we're linking to or
+# what someone who's statically linking us needs to link to.
+SET(LIBGIT2_PC_REQUIRES "")
+# This will be set later if we use the system's http-parser library or
+# use iconv (OSX) and will be written to the Libs.private field in the
+# pc file.
+SET(LIBGIT2_PC_LIBS "")
+
+SET(LIBGIT2_INCLUDES
+	"${CMAKE_CURRENT_BINARY_DIR}"
+	"${libgit2_SOURCE_DIR}/src"
+	"${libgit2_SOURCE_DIR}/include")
+SET(LIBGIT2_SYSTEM_INCLUDES "")
+SET(LIBGIT2_LIBS "")
+
+# Installation paths
+#
+SET(BIN_INSTALL_DIR bin CACHE PATH "Where to install binaries to.")
+SET(LIB_INSTALL_DIR lib CACHE PATH "Where to install libraries to.")
+SET(INCLUDE_INSTALL_DIR include CACHE PATH "Where to install headers to.")
+
+# Enable tracing
+IF (ENABLE_TRACE STREQUAL "ON")
+	SET(GIT_TRACE 1)
+ENDIF()
+ADD_FEATURE_INFO(tracing GIT_TRACE "tracing support")
+
+CHECK_FUNCTION_EXISTS(futimens HAVE_FUTIMENS)
+IF (HAVE_FUTIMENS)
+	SET(GIT_USE_FUTIMENS 1)
+ENDIF ()
+
+CHECK_PROTOTYPE_DEFINITION(qsort_r
+	"void qsort_r(void *base, size_t nmemb, size_t size, void *thunk, int (*compar)(void *, const void *, const void *))"
+	"" "stdlib.h" HAVE_QSORT_R_BSD)
+IF (HAVE_QSORT_R_BSD)
+	ADD_DEFINITIONS(-DHAVE_QSORT_R_BSD)
+ENDIF()
+
+CHECK_PROTOTYPE_DEFINITION(qsort_r
+	"void qsort_r(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *, void *), void *arg)"
+	"" "stdlib.h" HAVE_QSORT_R_GNU)
+IF (HAVE_QSORT_R_GNU)
+	ADD_DEFINITIONS(-DHAVE_QSORT_R_GNU)
+ENDIF()
+
+CHECK_FUNCTION_EXISTS(qsort_s HAVE_QSORT_S)
+IF (HAVE_QSORT_S)
+	ADD_DEFINITIONS(-DHAVE_QSORT_S)
+ENDIF ()
+
+# Find required dependencies
+
+IF(WIN32)
+	LIST(APPEND LIBGIT2_LIBS ws2_32)
+ELSEIF(CMAKE_SYSTEM_NAME MATCHES "(Solaris|SunOS)")
+	LIST(APPEND LIBGIT2_LIBS socket nsl)
+	LIST(APPEND LIBGIT2_PC_LIBS "-lsocket" "-lnsl")
+ELSEIF(CMAKE_SYSTEM_NAME MATCHES "Haiku")
+	LIST(APPEND LIBGIT2_LIBS network)
+	LIST(APPEND LIBGIT2_PC_LIBS "-lnetwork")
+ENDIF()
+
+CHECK_LIBRARY_EXISTS(rt clock_gettime "time.h" NEED_LIBRT)
+IF(NEED_LIBRT)
+	LIST(APPEND LIBGIT2_LIBS rt)
+	LIST(APPEND LIBGIT2_PC_LIBS "-lrt")
+ENDIF()
+
+IF(THREADSAFE)
+	LIST(APPEND LIBGIT2_LIBS ${CMAKE_THREAD_LIBS_INIT})
+	LIST(APPEND LIBGIT2_PC_LIBS ${CMAKE_THREAD_LIBS_INIT})
+ENDIF()
+ADD_FEATURE_INFO(threadsafe THREADSAFE "threadsafe support")
+
+
+IF (WIN32 AND EMBED_SSH_PATH)
+	FILE(GLOB SRC_SSH "${EMBED_SSH_PATH}/src/*.c")
+	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES "${EMBED_SSH_PATH}/include")
+	FILE(WRITE "${EMBED_SSH_PATH}/src/libssh2_config.h" "#define HAVE_WINCNG\n#define LIBSSH2_WINCNG\n#include \"../win32/libssh2_config.h\"")
+	SET(GIT_SSH 1)
+ENDIF()
+
+IF (WIN32 AND WINHTTP)
+	SET(GIT_WINHTTP 1)
+
+	# Since MinGW does not come with headers or an import library for winhttp,
+	# we have to include a private header and generate our own import library
+	IF (MINGW)
+		ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/winhttp" "${libgit2_BINARY_DIR}/deps/winhttp")
+		LIST(APPEND LIBGIT2_LIBS winhttp)
+		LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/winhttp")
+	ELSE()
+		LIST(APPEND LIBGIT2_LIBS "winhttp")
+		LIST(APPEND LIBGIT2_PC_LIBS "-lwinhttp")
+	ENDIF ()
+
+	LIST(APPEND LIBGIT2_LIBS "rpcrt4" "crypt32" "ole32")
+	LIST(APPEND LIBGIT2_PC_LIBS "-lrpcrt4" "-lcrypt32" "-lole32")
+ENDIF()
+
+Include(SelectHTTPSBackend)
+Include(SelectHashes)
+
+# Specify regular expression implementation
+FIND_PACKAGE(PCRE)
+
+IF(REGEX_BACKEND STREQUAL "")
+	CHECK_SYMBOL_EXISTS(regcomp_l "regex.h;xlocale.h" HAVE_REGCOMP_L)
+
+	IF(HAVE_REGCOMP_L)
+		SET(REGEX_BACKEND "regcomp_l")
+	ELSEIF(PCRE_FOUND)
+		SET(REGEX_BACKEND "pcre")
+	ELSE()
+		SET(REGEX_BACKEND "builtin")
+	ENDIF()
+ENDIF()
+
+IF(REGEX_BACKEND STREQUAL "regcomp_l")
+	ADD_FEATURE_INFO(regex ON "using system regcomp_l")
+	SET(GIT_REGEX_REGCOMP_L 1)
+ELSEIF(REGEX_BACKEND STREQUAL "pcre2")
+	FIND_PACKAGE(PCRE2)
+
+	IF(NOT PCRE2_FOUND)
+		MESSAGE(FATAL_ERROR "PCRE2 support was requested but not found")
+	ENDIF()
+
+	ADD_FEATURE_INFO(regex ON "using system PCRE2")
+	SET(GIT_REGEX_PCRE2 1)
+
+	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE2_INCLUDE_DIRS})
+	LIST(APPEND LIBGIT2_LIBS ${PCRE2_LIBRARIES})
+	LIST(APPEND LIBGIT2_PC_REQUIRES "libpcre2")
+ELSEIF(REGEX_BACKEND STREQUAL "pcre")
+	ADD_FEATURE_INFO(regex ON "using system PCRE")
+	SET(GIT_REGEX_PCRE 1)
+
+	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE_INCLUDE_DIRS})
+	LIST(APPEND LIBGIT2_LIBS ${PCRE_LIBRARIES})
+	LIST(APPEND LIBGIT2_PC_REQUIRES "libpcre")
+ELSEIF(REGEX_BACKEND STREQUAL "regcomp")
+	ADD_FEATURE_INFO(regex ON "using system regcomp")
+	SET(GIT_REGEX_REGCOMP 1)
+ELSEIF(REGEX_BACKEND STREQUAL "builtin")
+	ADD_FEATURE_INFO(regex ON "using bundled PCRE")
+	SET(GIT_REGEX_BUILTIN 1)
+
+	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/pcre" "${libgit2_BINARY_DIR}/deps/pcre")
+	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/pcre")
+	LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:pcre>)
+ELSE()
+	MESSAGE(FATAL_ERROR "The REGEX_BACKEND option provided is not supported")
+ENDIF()
+
+# Optional external dependency: http-parser
+IF(USE_HTTP_PARSER STREQUAL "system")
+	FIND_PACKAGE(HTTP_Parser)
+
+	IF (HTTP_PARSER_FOUND AND HTTP_PARSER_VERSION_MAJOR EQUAL 2)
+		LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${HTTP_PARSER_INCLUDE_DIRS})
+		LIST(APPEND LIBGIT2_LIBS ${HTTP_PARSER_LIBRARIES})
+		LIST(APPEND LIBGIT2_PC_LIBS "-lhttp_parser")
+		ADD_FEATURE_INFO(http-parser ON "http-parser support (system)")
+	ELSE()
+		MESSAGE(FATAL_ERROR "http-parser support was requested but not found")
+	ENDIF()
+ELSE()
+	MESSAGE(STATUS "http-parser version 2 was not found or disabled; using bundled 3rd-party sources.")
+	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/http-parser" "${libgit2_BINARY_DIR}/deps/http-parser")
+	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/http-parser")
+	LIST(APPEND LIBGIT2_OBJECTS "$<TARGET_OBJECTS:http-parser>")
+	ADD_FEATURE_INFO(http-parser ON "http-parser support (bundled)")
+ENDIF()
+
+# Optional external dependency: zlib
+IF(NOT USE_BUNDLED_ZLIB)
+	FIND_PACKAGE(ZLIB)
+	IF(ZLIB_FOUND)
+		LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${ZLIB_INCLUDE_DIRS})
+		LIST(APPEND LIBGIT2_LIBS ${ZLIB_LIBRARIES})
+		IF(APPLE OR CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
+			LIST(APPEND LIBGIT2_PC_LIBS "-lz")
+		ELSE()
+			LIST(APPEND LIBGIT2_PC_REQUIRES "zlib")
+		ENDIF()
+		ADD_FEATURE_INFO(zlib ON "using system zlib")
+	ELSE()
+		MESSAGE(STATUS "zlib was not found; using bundled 3rd-party sources." )
+	ENDIF()
+ENDIF()
+IF(USE_BUNDLED_ZLIB OR NOT ZLIB_FOUND)
+	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/zlib" "${libgit2_BINARY_DIR}/deps/zlib")
+	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/zlib")
+	LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:zlib>)
+	ADD_FEATURE_INFO(zlib ON "using bundled zlib")
+ENDIF()
+
+# Optional external dependency: libssh2
+IF (USE_SSH)
+	FIND_PKGLIBRARIES(LIBSSH2 libssh2)
+ENDIF()
+IF (LIBSSH2_FOUND)
+	SET(GIT_SSH 1)
+	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${LIBSSH2_INCLUDE_DIRS})
+	LIST(APPEND LIBGIT2_LIBS ${LIBSSH2_LIBRARIES})
+	LIST(APPEND LIBGIT2_PC_LIBS ${LIBSSH2_LDFLAGS})
+
+	CHECK_LIBRARY_EXISTS("${LIBSSH2_LIBRARIES}" libssh2_userauth_publickey_frommemory "${LIBSSH2_LIBRARY_DIRS}" HAVE_LIBSSH2_MEMORY_CREDENTIALS)
+	IF (HAVE_LIBSSH2_MEMORY_CREDENTIALS)
+		SET(GIT_SSH_MEMORY_CREDENTIALS 1)
+	ENDIF()
+ELSE()
+	MESSAGE(STATUS "LIBSSH2 not found. Set CMAKE_PREFIX_PATH if it is installed outside of the default search path.")
+ENDIF()
+ADD_FEATURE_INFO(SSH GIT_SSH "SSH transport support")
+
+# Optional external dependency: ntlmclient
+IF (USE_NTLMCLIENT)
+	SET(GIT_NTLM 1)
+	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/ntlmclient" "${libgit2_BINARY_DIR}/deps/ntlmclient")
+	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/ntlmclient")
+	LIST(APPEND LIBGIT2_OBJECTS "$<TARGET_OBJECTS:ntlmclient>")
+ENDIF()
+ADD_FEATURE_INFO(ntlmclient GIT_NTLM "NTLM authentication support for Unix")
+
+# Optional external dependency: GSSAPI
+
+INCLUDE(SelectGSSAPI)
+
+# Optional external dependency: iconv
+IF (USE_ICONV)
+	FIND_PACKAGE(Iconv)
+ENDIF()
+IF (ICONV_FOUND)
+	SET(GIT_USE_ICONV 1)
+	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${ICONV_INCLUDE_DIR})
+	LIST(APPEND LIBGIT2_LIBS ${ICONV_LIBRARIES})
+	LIST(APPEND LIBGIT2_PC_LIBS ${ICONV_LIBRARIES})
+ENDIF()
+ADD_FEATURE_INFO(iconv GIT_USE_ICONV "iconv encoding conversion support")
+
+
+IF (THREADSAFE)
+	IF (NOT WIN32)
+		FIND_PACKAGE(Threads REQUIRED)
+	ENDIF()
+
+	SET(GIT_THREADS 1)
+ENDIF()
+
+IF (USE_NSEC)
+	SET(GIT_USE_NSEC 1)
+ENDIF()
+
+IF (HAVE_STRUCT_STAT_ST_MTIM)
+	SET(GIT_USE_STAT_MTIM 1)
+ELSEIF (HAVE_STRUCT_STAT_ST_MTIMESPEC)
+	SET(GIT_USE_STAT_MTIMESPEC 1)
+ELSEIF (HAVE_STRUCT_STAT_ST_MTIME_NSEC)
+	SET(GIT_USE_STAT_MTIME_NSEC 1)
+ENDIF()
+
+ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=64)
+
+# Collect sourcefiles
+FILE(GLOB SRC_H
+	"${libgit2_SOURCE_DIR}/include/git2.h"
+	"${libgit2_SOURCE_DIR}/include/git2/*.h"
+	"${libgit2_SOURCE_DIR}/include/git2/sys/*.h")
+
+# On Windows use specific platform sources
+IF (WIN32 AND NOT CYGWIN)
+	IF(MSVC)
+		SET(WIN_RC "win32/git2.rc")
+	ENDIF()
+
+	FILE(GLOB SRC_OS win32/*.c win32/*.h)
+ELSEIF (AMIGA)
+	ADD_DEFINITIONS(-DNO_ADDRINFO -DNO_READDIR_R -DNO_MMAP)
+ELSE()
+	ADD_FEATURE_INFO(valgrind VALGRIND "valgrind hints")
+	IF (VALGRIND)
+		ADD_DEFINITIONS(-DVALGRIND)
+	ENDIF()
+
+	FILE(GLOB SRC_OS unix/*.c unix/*.h)
+ENDIF()
+
+FILE(GLOB SRC_GIT2 *.c *.h
+	allocators/*.c allocators/*.h
+	streams/*.c streams/*.h
+	transports/*.c transports/*.h
+	xdiff/*.c xdiff/*.h)
+
+# the xdiff dependency is not (yet) warning-free, disable warnings as
+# errors for the xdiff sources until we've sorted them out
+IF(MSVC)
+	SET_SOURCE_FILES_PROPERTIES(xdiff/xdiffi.c PROPERTIES COMPILE_FLAGS -WX-)
+	SET_SOURCE_FILES_PROPERTIES(xdiff/xutils.c PROPERTIES COMPILE_FLAGS -WX-)
+ENDIF()
+
+# Determine architecture of the machine
+IF (CMAKE_SIZEOF_VOID_P EQUAL 8)
+	SET(GIT_ARCH_64 1)
+ELSEIF (CMAKE_SIZEOF_VOID_P EQUAL 4)
+	SET(GIT_ARCH_32 1)
+ELSEIF (CMAKE_SIZEOF_VOID_P)
+	MESSAGE(FATAL_ERROR "Unsupported architecture (pointer size is ${CMAKE_SIZEOF_VOID_P} bytes)")
+ELSE()
+	MESSAGE(FATAL_ERROR "Unsupported architecture (CMAKE_SIZEOF_VOID_P is unset)")
+ENDIF()
+
+CONFIGURE_FILE(features.h.in git2/sys/features.h)
+
+SET(LIBGIT2_SOURCES ${SRC_H} ${SRC_GIT2} ${SRC_OS} ${SRC_SSH} ${SRC_SHA1})
+
+ADD_LIBRARY(git2internal OBJECT ${LIBGIT2_SOURCES})
+SET_TARGET_PROPERTIES(git2internal PROPERTIES C_STANDARD 90)
+IDE_SPLIT_SOURCES(git2internal)
+LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:git2internal>)
+
+TARGET_INCLUDE_DIRECTORIES(git2internal PRIVATE ${LIBGIT2_INCLUDES} PUBLIC ${libgit2_SOURCE_DIR}/include)
+TARGET_INCLUDE_DIRECTORIES(git2internal SYSTEM PRIVATE ${LIBGIT2_SYSTEM_INCLUDES})
+
+SET(LIBGIT2_OBJECTS ${LIBGIT2_OBJECTS} PARENT_SCOPE)
+SET(LIBGIT2_INCLUDES ${LIBGIT2_INCLUDES} PARENT_SCOPE)
+SET(LIBGIT2_SYSTEM_INCLUDES ${LIBGIT2_SYSTEM_INCLUDES} PARENT_SCOPE)
+SET(LIBGIT2_LIBS ${LIBGIT2_LIBS} PARENT_SCOPE)
+
+IF(XCODE_VERSION)
+	# This is required for Xcode to actually link the libgit2 library
+	# when using only object libraries.
+	FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/dummy.c "")
+	LIST(APPEND LIBGIT2_OBJECTS ${CMAKE_CURRENT_BINARY_DIR}/dummy.c)
+ENDIF()
+
+# Compile and link libgit2
+ADD_LIBRARY(git2 ${WIN_RC} ${LIBGIT2_OBJECTS})
+TARGET_LINK_LIBRARIES(git2 ${LIBGIT2_LIBS})
+
+SET_TARGET_PROPERTIES(git2 PROPERTIES C_STANDARD 90)
+SET_TARGET_PROPERTIES(git2 PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
+SET_TARGET_PROPERTIES(git2 PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
+SET_TARGET_PROPERTIES(git2 PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${libgit2_BINARY_DIR})
+
+# Workaround for Cmake bug #0011240 (see http://public.kitware.com/Bug/view.php?id=11240)
+# Win64+MSVC+static libs = linker error
+IF(MSVC AND GIT_ARCH_64 AND NOT BUILD_SHARED_LIBS)
+  SET_TARGET_PROPERTIES(git2 PROPERTIES STATIC_LIBRARY_FLAGS "/MACHINE:x64")
+ENDIF()
+
+IDE_SPLIT_SOURCES(git2)
+
+IF (SONAME)
+	SET_TARGET_PROPERTIES(git2 PROPERTIES VERSION ${LIBGIT2_VERSION_STRING})
+	SET_TARGET_PROPERTIES(git2 PROPERTIES SOVERSION ${LIBGIT2_SOVERSION})
+	IF (LIBGIT2_FILENAME)
+		ADD_DEFINITIONS(-DLIBGIT2_FILENAME=\"${LIBGIT2_FILENAME}\")
+		SET_TARGET_PROPERTIES(git2 PROPERTIES OUTPUT_NAME ${LIBGIT2_FILENAME})
+	ELSEIF (DEFINED LIBGIT2_PREFIX)
+		SET_TARGET_PROPERTIES(git2 PROPERTIES PREFIX "${LIBGIT2_PREFIX}")
+	ENDIF()
+ENDIF()
+
+PKG_BUILD_CONFIG(NAME libgit2
+	VERSION ${LIBGIT2_VERSION_STRING}
+	DESCRIPTION "The git library, take 2"
+	LIBS_SELF git2
+	PRIVATE_LIBS ${LIBGIT2_PC_LIBS}
+	REQUIRES ${LIBGIT2_PC_REQUIRES}
+)
+
+IF (MSVC_IDE)
+   # Precompiled headers
+   SET_TARGET_PROPERTIES(git2 PROPERTIES COMPILE_FLAGS "/Yuprecompiled.h /FIprecompiled.h")
+   SET_SOURCE_FILES_PROPERTIES(win32/precompiled.c COMPILE_FLAGS "/Ycprecompiled.h")
+ENDIF ()
+
+# Install
+INSTALL(TARGETS git2
+	RUNTIME DESTINATION ${BIN_INSTALL_DIR}
+	LIBRARY DESTINATION ${LIB_INSTALL_DIR}
+	ARCHIVE DESTINATION ${LIB_INSTALL_DIR}
+)
+INSTALL(DIRECTORY ${libgit2_SOURCE_DIR}/include/git2 DESTINATION ${INCLUDE_INSTALL_DIR} )
+INSTALL(FILES ${libgit2_SOURCE_DIR}/include/git2.h DESTINATION ${INCLUDE_INSTALL_DIR} )

node_modules/nodegit/vendor/libgit2/src/alloc.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "alloc.h"
+
+#include "allocators/stdalloc.h"
+#include "allocators/win32_crtdbg.h"
+
+git_allocator git__allocator;
+
+static int setup_default_allocator(void)
+{
+#if defined(GIT_MSVC_CRTDBG)
+	return git_win32_crtdbg_init_allocator(&git__allocator);
+#else
+	return git_stdalloc_init_allocator(&git__allocator);
+#endif
+}
+
+int git_allocator_global_init(void)
+{
+	/*
+	 * We don't want to overwrite any allocator which has been set before
+	 * the init function is called.
+	 */
+	if (git__allocator.gmalloc != NULL)
+		return 0;
+
+	return setup_default_allocator();
+}
+
+int git_allocator_setup(git_allocator *allocator)
+{
+	if (!allocator)
+		return setup_default_allocator();
+
+	memcpy(&git__allocator, allocator, sizeof(*allocator));
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/alloc.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_alloc_h__
+#define INCLUDE_alloc_h__
+
+#include "git2/sys/alloc.h"
+
+extern git_allocator git__allocator;
+
+#define git__malloc(len)                      git__allocator.gmalloc(len, __FILE__, __LINE__)
+#define git__calloc(nelem, elsize)            git__allocator.gcalloc(nelem, elsize, __FILE__, __LINE__)
+#define git__strdup(str)                      git__allocator.gstrdup(str, __FILE__, __LINE__)
+#define git__strndup(str, n)                  git__allocator.gstrndup(str, n, __FILE__, __LINE__)
+#define git__substrdup(str, n)                git__allocator.gsubstrdup(str, n, __FILE__, __LINE__)
+#define git__realloc(ptr, size)               git__allocator.grealloc(ptr, size, __FILE__, __LINE__)
+#define git__reallocarray(ptr, nelem, elsize) git__allocator.greallocarray(ptr, nelem, elsize, __FILE__, __LINE__)
+#define git__mallocarray(nelem, elsize)       git__allocator.gmallocarray(nelem, elsize, __FILE__, __LINE__)
+#define git__free                             git__allocator.gfree
+
+/**
+ * This function is being called by our global setup routines to
+ * initialize the standard allocator.
+ */
+int git_allocator_global_init(void);
+
+/**
+ * Switch out libgit2's global memory allocator
+ *
+ * @param allocator The new allocator that should be used. All function pointers
+ *                  of it need to be set correctly.
+ * @return An error code or 0.
+ */
+int git_allocator_setup(git_allocator *allocator);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/allocators/stdalloc.c

@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "stdalloc.h"
+
+static void *stdalloc__malloc(size_t len, const char *file, int line)
+{
+	void *ptr = malloc(len);
+
+	GIT_UNUSED(file);
+	GIT_UNUSED(line);
+
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static void *stdalloc__calloc(size_t nelem, size_t elsize, const char *file, int line)
+{
+	void *ptr = calloc(nelem, elsize);
+
+	GIT_UNUSED(file);
+	GIT_UNUSED(line);
+
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *stdalloc__strdup(const char *str, const char *file, int line)
+{
+	char *ptr = strdup(str);
+
+	GIT_UNUSED(file);
+	GIT_UNUSED(line);
+
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *stdalloc__strndup(const char *str, size_t n, const char *file, int line)
+{
+	size_t length = 0, alloclength;
+	char *ptr;
+
+	length = p_strnlen(str, n);
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloclength, length, 1) ||
+		!(ptr = stdalloc__malloc(alloclength, file, line)))
+		return NULL;
+
+	if (length)
+		memcpy(ptr, str, length);
+
+	ptr[length] = '\0';
+
+	return ptr;
+}
+
+static char *stdalloc__substrdup(const char *start, size_t n, const char *file, int line)
+{
+	char *ptr;
+	size_t alloclen;
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloclen, n, 1) ||
+		!(ptr = stdalloc__malloc(alloclen, file, line)))
+		return NULL;
+
+	memcpy(ptr, start, n);
+	ptr[n] = '\0';
+	return ptr;
+}
+
+static void *stdalloc__realloc(void *ptr, size_t size, const char *file, int line)
+{
+	void *new_ptr = realloc(ptr, size);
+
+	GIT_UNUSED(file);
+	GIT_UNUSED(line);
+
+	if (!new_ptr) git_error_set_oom();
+	return new_ptr;
+}
+
+static void *stdalloc__reallocarray(void *ptr, size_t nelem, size_t elsize, const char *file, int line)
+{
+	size_t newsize;
+
+	if (GIT_MULTIPLY_SIZET_OVERFLOW(&newsize, nelem, elsize))
+		return NULL;
+
+	return stdalloc__realloc(ptr, newsize, file, line);
+}
+
+static void *stdalloc__mallocarray(size_t nelem, size_t elsize, const char *file, int line)
+{
+	return stdalloc__reallocarray(NULL, nelem, elsize, file, line);
+}
+
+static void stdalloc__free(void *ptr)
+{
+	free(ptr);
+}
+
+int git_stdalloc_init_allocator(git_allocator *allocator)
+{
+	allocator->gmalloc = stdalloc__malloc;
+	allocator->gcalloc = stdalloc__calloc;
+	allocator->gstrdup = stdalloc__strdup;
+	allocator->gstrndup = stdalloc__strndup;
+	allocator->gsubstrdup = stdalloc__substrdup;
+	allocator->grealloc = stdalloc__realloc;
+	allocator->greallocarray = stdalloc__reallocarray;
+	allocator->gmallocarray = stdalloc__mallocarray;
+	allocator->gfree = stdalloc__free;
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/allocators/stdalloc.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_allocators_stdalloc_h__
+#define INCLUDE_allocators_stdalloc_h__
+
+#include "common.h"
+
+#include "alloc.h"
+
+int git_stdalloc_init_allocator(git_allocator *allocator);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/allocators/win32_crtdbg.c

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "win32_crtdbg.h"
+
+#if defined(GIT_MSVC_CRTDBG)
+
+#include "win32/w32_crtdbg_stacktrace.h"
+
+static void *crtdbg__malloc(size_t len, const char *file, int line)
+{
+	void *ptr = _malloc_dbg(len, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static void *crtdbg__calloc(size_t nelem, size_t elsize, const char *file, int line)
+{
+	void *ptr = _calloc_dbg(nelem, elsize, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *crtdbg__strdup(const char *str, const char *file, int line)
+{
+	char *ptr = _strdup_dbg(str, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *crtdbg__strndup(const char *str, size_t n, const char *file, int line)
+{
+	size_t length = 0, alloclength;
+	char *ptr;
+
+	length = p_strnlen(str, n);
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloclength, length, 1) ||
+		!(ptr = crtdbg__malloc(alloclength, file, line)))
+		return NULL;
+
+	if (length)
+		memcpy(ptr, str, length);
+
+	ptr[length] = '\0';
+
+	return ptr;
+}
+
+static char *crtdbg__substrdup(const char *start, size_t n, const char *file, int line)
+{
+	char *ptr;
+	size_t alloclen;
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloclen, n, 1) ||
+		!(ptr = crtdbg__malloc(alloclen, file, line)))
+		return NULL;
+
+	memcpy(ptr, start, n);
+	ptr[n] = '\0';
+	return ptr;
+}
+
+static void *crtdbg__realloc(void *ptr, size_t size, const char *file, int line)
+{
+	void *new_ptr = _realloc_dbg(ptr, size, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!new_ptr) git_error_set_oom();
+	return new_ptr;
+}
+
+static void *crtdbg__reallocarray(void *ptr, size_t nelem, size_t elsize, const char *file, int line)
+{
+	size_t newsize;
+
+	if (GIT_MULTIPLY_SIZET_OVERFLOW(&newsize, nelem, elsize))
+		return NULL;
+
+	return crtdbg__realloc(ptr, newsize, file, line);
+}
+
+static void *crtdbg__mallocarray(size_t nelem, size_t elsize, const char *file, int line)
+{
+	return crtdbg__reallocarray(NULL, nelem, elsize, file, line);
+}
+
+static void crtdbg__free(void *ptr)
+{
+	free(ptr);
+}
+
+int git_win32_crtdbg_init_allocator(git_allocator *allocator)
+{
+	allocator->gmalloc = crtdbg__malloc;
+	allocator->gcalloc = crtdbg__calloc;
+	allocator->gstrdup = crtdbg__strdup;
+	allocator->gstrndup = crtdbg__strndup;
+	allocator->gsubstrdup = crtdbg__substrdup;
+	allocator->grealloc = crtdbg__realloc;
+	allocator->greallocarray = crtdbg__reallocarray;
+	allocator->gmallocarray = crtdbg__mallocarray;
+	allocator->gfree = crtdbg__free;
+	return 0;
+}
+
+#else
+
+int git_win32_crtdbg_init_allocator(git_allocator *allocator)
+{
+	GIT_UNUSED(allocator);
+	git_error_set(GIT_EINVALID, "crtdbg memory allocator not available");
+	return -1;
+}
+
+#endif

node_modules/nodegit/vendor/libgit2/src/allocators/win32_crtdbg.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_allocators_crtdbg_h
+#define INCLUDE_allocators_crtdbg_h
+
+#include "common.h"
+
+#include "alloc.h"
+
+int git_win32_crtdbg_init_allocator(git_allocator *allocator);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/annotated_commit.c

@@ -0,0 +1,228 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "annotated_commit.h"
+
+#include "refs.h"
+#include "cache.h"
+
+#include "git2/commit.h"
+#include "git2/refs.h"
+#include "git2/repository.h"
+#include "git2/annotated_commit.h"
+#include "git2/revparse.h"
+#include "git2/tree.h"
+#include "git2/index.h"
+
+static int annotated_commit_init(
+	git_annotated_commit **out,
+	git_commit *commit,
+	const char *description)
+{
+	git_annotated_commit *annotated_commit;
+	int error = 0;
+
+	assert(out && commit);
+
+	*out = NULL;
+
+	annotated_commit = git__calloc(1, sizeof(git_annotated_commit));
+	GIT_ERROR_CHECK_ALLOC(annotated_commit);
+
+	annotated_commit->type = GIT_ANNOTATED_COMMIT_REAL;
+
+	if ((error = git_commit_dup(&annotated_commit->commit, commit)) < 0)
+		goto done;
+
+	git_oid_fmt(annotated_commit->id_str, git_commit_id(commit));
+	annotated_commit->id_str[GIT_OID_HEXSZ] = '\0';
+
+	if (!description)
+		description = annotated_commit->id_str;
+
+	annotated_commit->description = git__strdup(description);
+	GIT_ERROR_CHECK_ALLOC(annotated_commit->description);
+
+done:
+	if (!error)
+		*out = annotated_commit;
+
+	return error;
+}
+
+static int annotated_commit_init_from_id(
+	git_annotated_commit **out,
+	git_repository *repo,
+	const git_oid *id,
+	const char *description)
+{
+	git_commit *commit = NULL;
+	int error = 0;
+
+	assert(out && repo && id);
+
+	*out = NULL;
+
+	if ((error = git_commit_lookup(&commit, repo, id)) < 0)
+		goto done;
+
+	error = annotated_commit_init(out, commit, description);
+
+done:
+	git_commit_free(commit);
+	return error;
+}
+
+int git_annotated_commit_lookup(
+	git_annotated_commit **out,
+	git_repository *repo,
+	const git_oid *id)
+{
+	return annotated_commit_init_from_id(out, repo, id, NULL);
+}
+
+int git_annotated_commit_from_commit(
+	git_annotated_commit **out,
+	git_commit *commit)
+{
+	return annotated_commit_init(out, commit, NULL);
+}
+
+int git_annotated_commit_from_revspec(
+	git_annotated_commit **out,
+	git_repository *repo,
+	const char *revspec)
+{
+	git_object *obj, *commit;
+	int error;
+
+	assert(out && repo && revspec);
+
+	if ((error = git_revparse_single(&obj, repo, revspec)) < 0)
+		return error;
+
+	if ((error = git_object_peel(&commit, obj, GIT_OBJECT_COMMIT))) {
+		git_object_free(obj);
+		return error;
+	}
+
+	error = annotated_commit_init(out, (git_commit *)commit, revspec);
+
+	git_object_free(obj);
+	git_object_free(commit);
+
+	return error;
+}
+
+int git_annotated_commit_from_ref(
+	git_annotated_commit **out,
+	git_repository *repo,
+	const git_reference *ref)
+{
+	git_object *peeled;
+	int error = 0;
+
+	assert(out && repo && ref);
+
+	*out = NULL;
+
+	if ((error = git_reference_peel(&peeled, ref, GIT_OBJECT_COMMIT)) < 0)
+		return error;
+
+	error = annotated_commit_init_from_id(out,
+		repo,
+		git_object_id(peeled),
+		git_reference_name(ref));
+
+	if (!error) {
+		(*out)->ref_name = git__strdup(git_reference_name(ref));
+		GIT_ERROR_CHECK_ALLOC((*out)->ref_name);
+	}
+
+	git_object_free(peeled);
+	return error;
+}
+
+int git_annotated_commit_from_head(
+	git_annotated_commit **out,
+	git_repository *repo)
+{
+	git_reference *head;
+	int error;
+
+	assert(out && repo);
+
+	*out = NULL;
+
+    if ((error = git_reference_lookup(&head, repo, GIT_HEAD_FILE)) < 0)
+		return -1;
+
+	error = git_annotated_commit_from_ref(out, repo, head);
+
+	git_reference_free(head);
+	return error;
+}
+
+int git_annotated_commit_from_fetchhead(
+	git_annotated_commit **out,
+	git_repository *repo,
+	const char *branch_name,
+	const char *remote_url,
+	const git_oid *id)
+{
+	assert(repo && id && branch_name && remote_url);
+
+	if (annotated_commit_init_from_id(out, repo, id, branch_name) < 0)
+		return -1;
+
+	(*out)->ref_name = git__strdup(branch_name);
+	GIT_ERROR_CHECK_ALLOC((*out)->ref_name);
+
+	(*out)->remote_url = git__strdup(remote_url);
+	GIT_ERROR_CHECK_ALLOC((*out)->remote_url);
+
+	return 0;
+}
+
+
+const git_oid *git_annotated_commit_id(
+	const git_annotated_commit *annotated_commit)
+{
+	assert(annotated_commit);
+	return git_commit_id(annotated_commit->commit);
+}
+
+const char *git_annotated_commit_ref(
+	const git_annotated_commit *annotated_commit)
+{
+	assert(annotated_commit);
+	return annotated_commit->ref_name;
+}
+
+void git_annotated_commit_free(git_annotated_commit *annotated_commit)
+{
+	if (annotated_commit == NULL)
+		return;
+
+	switch (annotated_commit->type) {
+		case GIT_ANNOTATED_COMMIT_REAL:
+			git_commit_free(annotated_commit->commit);
+			git_tree_free(annotated_commit->tree);
+			git__free((char *)annotated_commit->description);
+			git__free((char *)annotated_commit->ref_name);
+			git__free((char *)annotated_commit->remote_url);
+			break;
+		case GIT_ANNOTATED_COMMIT_VIRTUAL:
+			git_index_free(annotated_commit->index);
+			git_array_clear(annotated_commit->parents);
+			break;
+		default:
+			abort();
+	}
+
+	git__free(annotated_commit);
+}

node_modules/nodegit/vendor/libgit2/src/annotated_commit.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_annotated_commit_h__
+#define INCLUDE_annotated_commit_h__
+
+#include "common.h"
+
+#include "oidarray.h"
+
+#include "git2/oid.h"
+
+typedef enum {
+	GIT_ANNOTATED_COMMIT_REAL = 1,
+	GIT_ANNOTATED_COMMIT_VIRTUAL = 2,
+} git_annotated_commit_t;
+
+/**
+ * Internal structure for merge inputs.  An annotated commit is generally
+ * "real" and backed by an actual commit in the repository, but merge will
+ * internally create "virtual" commits that are in-memory intermediate
+ * commits backed by an index.
+ */
+struct git_annotated_commit {
+	git_annotated_commit_t type;
+
+	/* real commit */
+	git_commit *commit;
+	git_tree *tree;
+
+	/* virtual commit structure */
+	git_index *index;
+	git_array_oid_t parents;
+
+	/* how this commit was looked up */
+	const char *description;
+
+	const char *ref_name;
+	const char *remote_url;
+
+	char id_str[GIT_OID_HEXSZ+1];
+};
+
+extern int git_annotated_commit_from_head(git_annotated_commit **out,
+	git_repository *repo);
+extern int git_annotated_commit_from_commit(git_annotated_commit **out,
+	git_commit *commit);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/apply.c

@@ -0,0 +1,885 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "apply.h"
+
+#include "git2/apply.h"
+#include "git2/patch.h"
+#include "git2/filter.h"
+#include "git2/blob.h"
+#include "git2/index.h"
+#include "git2/checkout.h"
+#include "git2/repository.h"
+#include "array.h"
+#include "patch.h"
+#include "futils.h"
+#include "delta.h"
+#include "zstream.h"
+#include "reader.h"
+#include "index.h"
+
+typedef struct {
+	/* The lines that we allocate ourself are allocated out of the pool.
+	 * (Lines may have been allocated out of the diff.)
+	 */
+	git_pool pool;
+	git_vector lines;
+} patch_image;
+
+static int apply_err(const char *fmt, ...) GIT_FORMAT_PRINTF(1, 2);
+static int apply_err(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	git_error_vset(GIT_ERROR_PATCH, fmt, ap);
+	va_end(ap);
+
+	return GIT_EAPPLYFAIL;
+}
+
+static void patch_line_init(
+	git_diff_line *out,
+	const char *in,
+	size_t in_len,
+	size_t in_offset)
+{
+	out->content = in;
+	out->content_len = in_len;
+	out->content_offset = in_offset;
+}
+
+#define PATCH_IMAGE_INIT { GIT_POOL_INIT, GIT_VECTOR_INIT }
+
+static int patch_image_init_fromstr(
+	patch_image *out, const char *in, size_t in_len)
+{
+	git_diff_line *line;
+	const char *start, *end;
+
+	memset(out, 0x0, sizeof(patch_image));
+
+	git_pool_init(&out->pool, sizeof(git_diff_line));
+
+	for (start = in; start < in + in_len; start = end) {
+		end = memchr(start, '\n', in_len - (start - in));
+
+		if (end == NULL)
+			end = in + in_len;
+
+		else if (end < in + in_len)
+			end++;
+
+		line = git_pool_mallocz(&out->pool, 1);
+		GIT_ERROR_CHECK_ALLOC(line);
+
+		if (git_vector_insert(&out->lines, line) < 0)
+			return -1;
+
+		patch_line_init(line, start, (end - start), (start - in));
+	}
+
+	return 0;
+}
+
+static void patch_image_free(patch_image *image)
+{
+	if (image == NULL)
+		return;
+
+	git_pool_clear(&image->pool);
+	git_vector_free(&image->lines);
+}
+
+static bool match_hunk(
+	patch_image *image,
+	patch_image *preimage,
+	size_t linenum)
+{
+	bool match = 0;
+	size_t i;
+
+	/* Ensure this hunk is within the image boundaries. */
+	if (git_vector_length(&preimage->lines) + linenum >
+		git_vector_length(&image->lines))
+		return 0;
+
+	match = 1;
+
+	/* Check exact match. */
+	for (i = 0; i < git_vector_length(&preimage->lines); i++) {
+		git_diff_line *preimage_line = git_vector_get(&preimage->lines, i);
+		git_diff_line *image_line = git_vector_get(&image->lines, linenum + i);
+
+		if (preimage_line->content_len != image_line->content_len ||
+			memcmp(preimage_line->content, image_line->content, image_line->content_len) != 0) {
+			match = 0;
+			break;
+		}
+	}
+
+	return match;
+}
+
+static bool find_hunk_linenum(
+	size_t *out,
+	patch_image *image,
+	patch_image *preimage,
+	size_t linenum)
+{
+	size_t max = git_vector_length(&image->lines);
+	bool match;
+
+	if (linenum > max)
+		linenum = max;
+
+	match = match_hunk(image, preimage, linenum);
+
+	*out = linenum;
+	return match;
+}
+
+static int update_hunk(
+	patch_image *image,
+	size_t linenum,
+	patch_image *preimage,
+	patch_image *postimage)
+{
+	size_t postlen = git_vector_length(&postimage->lines);
+	size_t prelen = git_vector_length(&preimage->lines);
+	size_t i;
+	int error = 0;
+
+	if (postlen > prelen)
+		error = git_vector_insert_null(
+			&image->lines, linenum, (postlen - prelen));
+	else if (prelen > postlen)
+		error = git_vector_remove_range(
+			&image->lines, linenum, (prelen - postlen));
+
+	if (error) {
+		git_error_set_oom();
+		return -1;
+	}
+
+	for (i = 0; i < git_vector_length(&postimage->lines); i++) {
+		image->lines.contents[linenum + i] =
+			git_vector_get(&postimage->lines, i);
+	}
+
+	return 0;
+}
+
+typedef struct {
+	git_apply_options opts;
+	size_t skipped_new_lines;
+	size_t skipped_old_lines;
+} apply_hunks_ctx;
+
+static int apply_hunk(
+	patch_image *image,
+	git_patch *patch,
+	git_patch_hunk *hunk,
+	apply_hunks_ctx *ctx)
+{
+	patch_image preimage = PATCH_IMAGE_INIT, postimage = PATCH_IMAGE_INIT;
+	size_t line_num, i;
+	int error = 0;
+
+	if (ctx->opts.hunk_cb) {
+		error = ctx->opts.hunk_cb(&hunk->hunk, ctx->opts.payload);
+
+		if (error) {
+			if (error > 0) {
+				ctx->skipped_new_lines += hunk->hunk.new_lines;
+				ctx->skipped_old_lines += hunk->hunk.old_lines;
+				error = 0;
+			}
+
+			goto done;
+		}
+	}
+
+	for (i = 0; i < hunk->line_count; i++) {
+		size_t linenum = hunk->line_start + i;
+		git_diff_line *line = git_array_get(patch->lines, linenum), *prev;
+
+		if (!line) {
+			error = apply_err("preimage does not contain line %"PRIuZ, linenum);
+			goto done;
+		}
+
+		switch (line->origin) {
+			case GIT_DIFF_LINE_CONTEXT_EOFNL:
+			case GIT_DIFF_LINE_DEL_EOFNL:
+			case GIT_DIFF_LINE_ADD_EOFNL:
+				prev = i ? git_array_get(patch->lines, linenum - 1) : NULL;
+				if (prev && prev->content[prev->content_len - 1] == '\n')
+					prev->content_len -= 1;
+				break;
+			case GIT_DIFF_LINE_CONTEXT:
+				if ((error = git_vector_insert(&preimage.lines, line)) < 0 ||
+				    (error = git_vector_insert(&postimage.lines, line)) < 0)
+					goto done;
+				break;
+			case GIT_DIFF_LINE_DELETION:
+				if ((error = git_vector_insert(&preimage.lines, line)) < 0)
+					goto done;
+				break;
+			case GIT_DIFF_LINE_ADDITION:
+				if ((error = git_vector_insert(&postimage.lines, line)) < 0)
+					goto done;
+				break;
+		}
+	}
+
+	if (hunk->hunk.new_start) {
+		line_num = hunk->hunk.new_start -
+			ctx->skipped_new_lines +
+			ctx->skipped_old_lines -
+			1;
+	} else {
+		line_num = 0;
+	}
+
+	if (!find_hunk_linenum(&line_num, image, &preimage, line_num)) {
+		error = apply_err("hunk at line %d did not apply",
+			hunk->hunk.new_start);
+		goto done;
+	}
+
+	error = update_hunk(image, line_num, &preimage, &postimage);
+
+done:
+	patch_image_free(&preimage);
+	patch_image_free(&postimage);
+
+	return error;
+}
+
+static int apply_hunks(
+	git_buf *out,
+	const char *source,
+	size_t source_len,
+	git_patch *patch,
+	apply_hunks_ctx *ctx)
+{
+	git_patch_hunk *hunk;
+	git_diff_line *line;
+	patch_image image;
+	size_t i;
+	int error = 0;
+
+	if ((error = patch_image_init_fromstr(&image, source, source_len)) < 0)
+		goto done;
+
+	git_array_foreach(patch->hunks, i, hunk) {
+		if ((error = apply_hunk(&image, patch, hunk, ctx)) < 0)
+			goto done;
+	}
+
+	git_vector_foreach(&image.lines, i, line)
+		git_buf_put(out, line->content, line->content_len);
+
+done:
+	patch_image_free(&image);
+
+	return error;
+}
+
+static int apply_binary_delta(
+	git_buf *out,
+	const char *source,
+	size_t source_len,
+	git_diff_binary_file *binary_file)
+{
+	git_buf inflated = GIT_BUF_INIT;
+	int error = 0;
+
+	/* no diff means identical contents */
+	if (binary_file->datalen == 0)
+		return git_buf_put(out, source, source_len);
+
+	error = git_zstream_inflatebuf(&inflated,
+		binary_file->data, binary_file->datalen);
+
+	if (!error && inflated.size != binary_file->inflatedlen) {
+		error = apply_err("inflated delta does not match expected length");
+		git_buf_dispose(out);
+	}
+
+	if (error < 0)
+		goto done;
+
+	if (binary_file->type == GIT_DIFF_BINARY_DELTA) {
+		void *data;
+		size_t data_len;
+
+		error = git_delta_apply(&data, &data_len, (void *)source, source_len,
+			(void *)inflated.ptr, inflated.size);
+
+		out->ptr = data;
+		out->size = data_len;
+		out->asize = data_len;
+	}
+	else if (binary_file->type == GIT_DIFF_BINARY_LITERAL) {
+		git_buf_swap(out, &inflated);
+	}
+	else {
+		error = apply_err("unknown binary delta type");
+		goto done;
+	}
+
+done:
+	git_buf_dispose(&inflated);
+	return error;
+}
+
+static int apply_binary(
+	git_buf *out,
+	const char *source,
+	size_t source_len,
+	git_patch *patch)
+{
+	git_buf reverse = GIT_BUF_INIT;
+	int error = 0;
+
+	if (!patch->binary.contains_data) {
+		error = apply_err("patch does not contain binary data");
+		goto done;
+	}
+
+	if (!patch->binary.old_file.datalen && !patch->binary.new_file.datalen)
+		goto done;
+
+	/* first, apply the new_file delta to the given source */
+	if ((error = apply_binary_delta(out, source, source_len,
+			&patch->binary.new_file)) < 0)
+		goto done;
+
+	/* second, apply the old_file delta to sanity check the result */
+	if ((error = apply_binary_delta(&reverse, out->ptr, out->size,
+			&patch->binary.old_file)) < 0)
+		goto done;
+
+	/* Verify that the resulting file with the reverse patch applied matches the source file */
+	if (source_len != reverse.size ||
+		(source_len && memcmp(source, reverse.ptr, source_len) != 0)) {
+		error = apply_err("binary patch did not apply cleanly");
+		goto done;
+	}
+
+done:
+	if (error < 0)
+		git_buf_dispose(out);
+
+	git_buf_dispose(&reverse);
+	return error;
+}
+
+int git_apply__patch(
+	git_buf *contents_out,
+	char **filename_out,
+	unsigned int *mode_out,
+	const char *source,
+	size_t source_len,
+	git_patch *patch,
+	const git_apply_options *given_opts)
+{
+	apply_hunks_ctx ctx = { GIT_APPLY_OPTIONS_INIT };
+	char *filename = NULL;
+	unsigned int mode = 0;
+	int error = 0;
+
+	assert(contents_out && filename_out && mode_out && (source || !source_len) && patch);
+
+	if (given_opts)
+		memcpy(&ctx.opts, given_opts, sizeof(git_apply_options));
+
+	*filename_out = NULL;
+	*mode_out = 0;
+
+	if (patch->delta->status != GIT_DELTA_DELETED) {
+		const git_diff_file *newfile = &patch->delta->new_file;
+
+		filename = git__strdup(newfile->path);
+		mode = newfile->mode ?
+			newfile->mode : GIT_FILEMODE_BLOB;
+	}
+
+	if (patch->delta->flags & GIT_DIFF_FLAG_BINARY)
+		error = apply_binary(contents_out, source, source_len, patch);
+	else if (patch->hunks.size)
+		error = apply_hunks(contents_out, source, source_len, patch, &ctx);
+	else
+		error = git_buf_put(contents_out, source, source_len);
+
+	if (error)
+		goto done;
+
+	if (patch->delta->status == GIT_DELTA_DELETED &&
+		git_buf_len(contents_out) > 0) {
+		error = apply_err("removal patch leaves file contents");
+		goto done;
+	}
+
+	*filename_out = filename;
+	*mode_out = mode;
+
+done:
+	if (error < 0)
+		git__free(filename);
+
+	return error;
+}
+
+static int apply_one(
+	git_repository *repo,
+	git_reader *preimage_reader,
+	git_index *preimage,
+	git_reader *postimage_reader,
+	git_index *postimage,
+	git_diff *diff,
+	git_strmap *removed_paths,
+	size_t i,
+	const git_apply_options *opts)
+{
+	git_patch *patch = NULL;
+	git_buf pre_contents = GIT_BUF_INIT, post_contents = GIT_BUF_INIT;
+	const git_diff_delta *delta;
+	char *filename = NULL;
+	unsigned int mode;
+	git_oid pre_id, post_id;
+	git_filemode_t pre_filemode;
+	git_index_entry pre_entry, post_entry;
+	bool skip_preimage = false;
+	int error;
+
+	if ((error = git_patch_from_diff(&patch, diff, i)) < 0)
+		goto done;
+
+	delta = git_patch_get_delta(patch);
+
+	if (opts->delta_cb) {
+		error = opts->delta_cb(delta, opts->payload);
+
+		if (error) {
+			if (error > 0)
+				error = 0;
+
+			goto done;
+		}
+	}
+
+	/*
+	 * Ensure that the file has not been deleted or renamed if we're
+	 * applying a modification delta.
+	 */
+	if (delta->status != GIT_DELTA_RENAMED &&
+	    delta->status != GIT_DELTA_ADDED) {
+		if (git_strmap_exists(removed_paths, delta->old_file.path)) {
+			error = apply_err("path '%s' has been renamed or deleted", delta->old_file.path);
+			goto done;
+		}
+	}
+
+	/*
+	 * We may be applying a second delta to an already seen file.  If so,
+	 * use the already modified data in the postimage instead of the
+	 * content from the index or working directory.  (Don't do this in
+	 * the case of a rename, which must be specified before additional
+	 * deltas since we apply deltas to the target filename.)
+	 */
+	if (delta->status != GIT_DELTA_RENAMED) {
+		if ((error = git_reader_read(&pre_contents, &pre_id, &pre_filemode,
+		    postimage_reader, delta->old_file.path)) == 0) {
+			skip_preimage = true;
+		} else if (error == GIT_ENOTFOUND) {
+			git_error_clear();
+			error = 0;
+		} else {
+			goto done;
+		}
+	}
+
+	if (!skip_preimage && delta->status != GIT_DELTA_ADDED) {
+		error = git_reader_read(&pre_contents, &pre_id, &pre_filemode,
+			preimage_reader, delta->old_file.path);
+
+		/* ENOTFOUND means the preimage was not found; apply failed. */
+		if (error == GIT_ENOTFOUND)
+			error = GIT_EAPPLYFAIL;
+
+		/* When applying to BOTH, the index did not match the workdir. */
+		if (error == GIT_READER_MISMATCH)
+			error = apply_err("%s: does not match index", delta->old_file.path);
+
+		if (error < 0)
+			goto done;
+
+		/*
+		 * We need to populate the preimage data structure with the
+		 * contents that we are using as the preimage for this file.
+		 * This allows us to apply patches to files that have been
+		 * modified in the working directory.  During checkout,
+		 * we will use this expected preimage as the baseline, and
+		 * limit checkout to only the paths affected by patch
+		 * application.  (Without this, we would fail to write the
+		 * postimage contents to any file that had been modified
+		 * from HEAD on-disk, even if the patch application succeeded.)
+		 * Use the contents from the delta where available - some
+		 * fields may not be available, like the old file mode (eg in
+		 * an exact rename situation) so trust the patch parsing to
+		 * validate and use the preimage data in that case.
+		 */
+		if (preimage) {
+			memset(&pre_entry, 0, sizeof(git_index_entry));
+			pre_entry.path = delta->old_file.path;
+			pre_entry.mode = delta->old_file.mode ? delta->old_file.mode : pre_filemode;
+			git_oid_cpy(&pre_entry.id, &pre_id);
+
+			if ((error = git_index_add(preimage, &pre_entry)) < 0)
+				goto done;
+		}
+	}
+
+	if (delta->status != GIT_DELTA_DELETED) {
+		if ((error = git_apply__patch(&post_contents, &filename, &mode,
+				pre_contents.ptr, pre_contents.size, patch, opts)) < 0 ||
+			(error = git_blob_create_from_buffer(&post_id, repo,
+				post_contents.ptr, post_contents.size)) < 0)
+			goto done;
+
+		memset(&post_entry, 0, sizeof(git_index_entry));
+		post_entry.path = filename;
+		post_entry.mode = mode;
+		git_oid_cpy(&post_entry.id, &post_id);
+
+		if ((error = git_index_add(postimage, &post_entry)) < 0)
+			goto done;
+	}
+
+	if (delta->status == GIT_DELTA_RENAMED ||
+	    delta->status == GIT_DELTA_DELETED)
+		error = git_strmap_set(removed_paths, delta->old_file.path, (char *) delta->old_file.path);
+
+	if (delta->status == GIT_DELTA_RENAMED ||
+	    delta->status == GIT_DELTA_ADDED)
+		git_strmap_delete(removed_paths, delta->new_file.path);
+
+done:
+	git_buf_dispose(&pre_contents);
+	git_buf_dispose(&post_contents);
+	git__free(filename);
+	git_patch_free(patch);
+
+	return error;
+}
+
+static int apply_deltas(
+	git_repository *repo,
+	git_reader *pre_reader,
+	git_index *preimage,
+	git_reader *post_reader,
+	git_index *postimage,
+	git_diff *diff,
+	const git_apply_options *opts)
+{
+	git_strmap *removed_paths;
+	size_t i;
+	int error = 0;
+
+	if (git_strmap_new(&removed_paths) < 0)
+		return -1;
+
+	for (i = 0; i < git_diff_num_deltas(diff); i++) {
+		if ((error = apply_one(repo, pre_reader, preimage, post_reader, postimage, diff, removed_paths, i, opts)) < 0)
+			goto done;
+	}
+
+done:
+	git_strmap_free(removed_paths);
+	return error;
+}
+
+int git_apply_to_tree(
+	git_index **out,
+	git_repository *repo,
+	git_tree *preimage,
+	git_diff *diff,
+	const git_apply_options *given_opts)
+{
+	git_index *postimage = NULL;
+	git_reader *pre_reader = NULL, *post_reader = NULL;
+	git_apply_options opts = GIT_APPLY_OPTIONS_INIT;
+	const git_diff_delta *delta;
+	size_t i;
+	int error = 0;
+
+	assert(out && repo && preimage && diff);
+
+	*out = NULL;
+
+	if (given_opts)
+		memcpy(&opts, given_opts, sizeof(git_apply_options));
+
+	if ((error = git_reader_for_tree(&pre_reader, preimage)) < 0)
+		goto done;
+
+	/*
+	 * put the current tree into the postimage as-is - the diff will
+	 * replace any entries contained therein
+	 */
+	if ((error = git_index_new(&postimage)) < 0 ||
+		(error = git_index_read_tree(postimage, preimage)) < 0 ||
+		(error = git_reader_for_index(&post_reader, repo, postimage)) < 0)
+		goto done;
+
+	/*
+	 * Remove the old paths from the index before applying diffs -
+	 * we need to do a full pass to remove them before adding deltas,
+	 * in order to handle rename situations.
+	 */
+	for (i = 0; i < git_diff_num_deltas(diff); i++) {
+		delta = git_diff_get_delta(diff, i);
+
+		if (delta->status == GIT_DELTA_DELETED ||
+			delta->status == GIT_DELTA_RENAMED) {
+			if ((error = git_index_remove(postimage,
+					delta->old_file.path, 0)) < 0)
+				goto done;
+		}
+	}
+
+	if ((error = apply_deltas(repo, pre_reader, NULL, post_reader, postimage, diff, &opts)) < 0)
+		goto done;
+
+	*out = postimage;
+
+done:
+	if (error < 0)
+		git_index_free(postimage);
+
+	git_reader_free(pre_reader);
+	git_reader_free(post_reader);
+
+	return error;
+}
+
+static int git_apply__to_workdir(
+	git_repository *repo,
+	git_diff *diff,
+	git_index *preimage,
+	git_index *postimage,
+	git_apply_location_t location,
+	git_apply_options *opts)
+{
+	git_vector paths = GIT_VECTOR_INIT;
+	git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
+	const git_diff_delta *delta;
+	size_t i;
+	int error;
+
+	GIT_UNUSED(opts);
+
+	/*
+	 * Limit checkout to the paths affected by the diff; this ensures
+	 * that other modifications in the working directory are unaffected.
+	 */
+	if ((error = git_vector_init(&paths, git_diff_num_deltas(diff), NULL)) < 0)
+		goto done;
+
+	for (i = 0; i < git_diff_num_deltas(diff); i++) {
+		delta = git_diff_get_delta(diff, i);
+
+		if ((error = git_vector_insert(&paths, (void *)delta->old_file.path)) < 0)
+			goto done;
+
+		if (strcmp(delta->old_file.path, delta->new_file.path) &&
+		    (error = git_vector_insert(&paths, (void *)delta->new_file.path)) < 0)
+			goto done;
+	}
+
+	checkout_opts.checkout_strategy |= GIT_CHECKOUT_SAFE;
+	checkout_opts.checkout_strategy |= GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH;
+	checkout_opts.checkout_strategy |= GIT_CHECKOUT_DONT_WRITE_INDEX;
+
+	if (location == GIT_APPLY_LOCATION_WORKDIR)
+		checkout_opts.checkout_strategy |= GIT_CHECKOUT_DONT_UPDATE_INDEX;
+
+	checkout_opts.paths.strings = (char **)paths.contents;
+	checkout_opts.paths.count = paths.length;
+
+	checkout_opts.baseline_index = preimage;
+
+	error = git_checkout_index(repo, postimage, &checkout_opts);
+
+done:
+	git_vector_free(&paths);
+	return error;
+}
+
+static int git_apply__to_index(
+	git_repository *repo,
+	git_diff *diff,
+	git_index *preimage,
+	git_index *postimage,
+	git_apply_options *opts)
+{
+	git_index *index = NULL;
+	const git_diff_delta *delta;
+	const git_index_entry *entry;
+	size_t i;
+	int error;
+
+	GIT_UNUSED(preimage);
+	GIT_UNUSED(opts);
+
+	if ((error = git_repository_index(&index, repo)) < 0)
+		goto done;
+
+	/* Remove deleted (or renamed) paths from the index. */
+	for (i = 0; i < git_diff_num_deltas(diff); i++) {
+		delta = git_diff_get_delta(diff, i);
+
+		if (delta->status == GIT_DELTA_DELETED ||
+		    delta->status == GIT_DELTA_RENAMED) {
+			if ((error = git_index_remove(index, delta->old_file.path, 0)) < 0)
+				goto done;
+		}
+	}
+
+	/* Then add the changes back to the index. */
+	for (i = 0; i < git_index_entrycount(postimage); i++) {
+		entry = git_index_get_byindex(postimage, i);
+
+		if ((error = git_index_add(index, entry)) < 0)
+			goto done;
+	}
+
+done:
+	git_index_free(index);
+	return error;
+}
+
+int git_apply_options_init(git_apply_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_apply_options, GIT_APPLY_OPTIONS_INIT);
+	return 0;
+}
+
+/*
+ * Handle the three application options ("locations"):
+ *
+ * GIT_APPLY_LOCATION_WORKDIR: the default, emulates `git apply`.
+ * Applies the diff only to the workdir items and ignores the index
+ * entirely.
+ *
+ * GIT_APPLY_LOCATION_INDEX: emulates `git apply --cached`.
+ * Applies the diff only to the index items and ignores the workdir
+ * completely.
+ *
+ * GIT_APPLY_LOCATION_BOTH: emulates `git apply --index`.
+ * Applies the diff to both the index items and the working directory
+ * items.
+ */
+
+int git_apply(
+	git_repository *repo,
+	git_diff *diff,
+	git_apply_location_t location,
+	const git_apply_options *given_opts)
+{
+	git_indexwriter indexwriter = GIT_INDEXWRITER_INIT;
+	git_index *index = NULL, *preimage = NULL, *postimage = NULL;
+	git_reader *pre_reader = NULL, *post_reader = NULL;
+	git_apply_options opts = GIT_APPLY_OPTIONS_INIT;
+	int error = GIT_EINVALID;
+
+	assert(repo && diff);
+
+	GIT_ERROR_CHECK_VERSION(
+		given_opts, GIT_APPLY_OPTIONS_VERSION, "git_apply_options");
+
+	if (given_opts)
+		memcpy(&opts, given_opts, sizeof(git_apply_options));
+
+	/*
+	 * by default, we apply a patch directly to the working directory;
+	 * in `--cached` or `--index` mode, we apply to the contents already
+	 * in the index.
+	 */
+	switch (location) {
+	case GIT_APPLY_LOCATION_BOTH:
+		error = git_reader_for_workdir(&pre_reader, repo, true);
+		break;
+	case GIT_APPLY_LOCATION_INDEX:
+		error = git_reader_for_index(&pre_reader, repo, NULL);
+		break;
+	case GIT_APPLY_LOCATION_WORKDIR:
+		error = git_reader_for_workdir(&pre_reader, repo, false);
+		break;
+	default:
+		assert(false);
+	}
+
+	if (error < 0)
+		goto done;
+
+	/*
+	 * Build the preimage and postimage (differences).  Note that
+	 * this is not the complete preimage or postimage, it only
+	 * contains the files affected by the patch.  We want to avoid
+	 * having the full repo index, so we will limit our checkout
+	 * to only write these files that were affected by the diff.
+	 */
+	if ((error = git_index_new(&preimage)) < 0 ||
+	    (error = git_index_new(&postimage)) < 0 ||
+	    (error = git_reader_for_index(&post_reader, repo, postimage)) < 0)
+		goto done;
+
+	if (!(opts.flags & GIT_APPLY_CHECK))
+		if ((error = git_repository_index(&index, repo)) < 0 ||
+		    (error = git_indexwriter_init(&indexwriter, index)) < 0)
+			goto done;
+
+	if ((error = apply_deltas(repo, pre_reader, preimage, post_reader, postimage, diff, &opts)) < 0)
+		goto done;
+
+	if ((opts.flags & GIT_APPLY_CHECK))
+		goto done;
+
+	switch (location) {
+	case GIT_APPLY_LOCATION_BOTH:
+		error = git_apply__to_workdir(repo, diff, preimage, postimage, location, &opts);
+		break;
+	case GIT_APPLY_LOCATION_INDEX:
+		error = git_apply__to_index(repo, diff, preimage, postimage, &opts);
+		break;
+	case GIT_APPLY_LOCATION_WORKDIR:
+		error = git_apply__to_workdir(repo, diff, preimage, postimage, location, &opts);
+		break;
+	default:
+		assert(false);
+	}
+
+	if (error < 0)
+		goto done;
+
+	error = git_indexwriter_commit(&indexwriter);
+
+done:
+	git_indexwriter_cleanup(&indexwriter);
+	git_index_free(postimage);
+	git_index_free(preimage);
+	git_index_free(index);
+	git_reader_free(pre_reader);
+	git_reader_free(post_reader);
+
+	return error;
+}

node_modules/nodegit/vendor/libgit2/src/apply.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_apply_h__
+#define INCLUDE_apply_h__
+
+#include "common.h"
+
+#include "git2/patch.h"
+#include "git2/apply.h"
+#include "buffer.h"
+
+extern int git_apply__patch(
+	git_buf *out,
+	char **filename,
+	unsigned int *mode,
+	const char *source,
+	size_t source_len,
+	git_patch *patch,
+	const git_apply_options *opts);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/array.h

@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_array_h__
+#define INCLUDE_array_h__
+
+#include "common.h"
+
+/*
+ * Use this to declare a typesafe resizable array of items, a la:
+ *
+ *     git_array_t(int) my_ints = GIT_ARRAY_INIT;
+ *     ...
+ *     int *i = git_array_alloc(my_ints);
+ *     GIT_ERROR_CHECK_ALLOC(i);
+ *     ...
+ *     git_array_clear(my_ints);
+ *
+ * You may also want to do things like:
+ *
+ *     typedef git_array_t(my_struct) my_struct_array_t;
+ */
+#define git_array_t(type) struct { type *ptr; size_t size, asize; }
+
+#define GIT_ARRAY_INIT { NULL, 0, 0 }
+
+#define git_array_init(a) \
+	do { (a).size = (a).asize = 0; (a).ptr = NULL; } while (0)
+
+#define git_array_init_to_size(a, desired) \
+	do { (a).size = 0; (a).asize = desired; (a).ptr = git__calloc(desired, sizeof(*(a).ptr)); } while (0)
+
+#define git_array_clear(a) \
+	do { git__free((a).ptr); git_array_init(a); } while (0)
+
+#define GIT_ERROR_CHECK_ARRAY(a) GIT_ERROR_CHECK_ALLOC((a).ptr)
+
+
+typedef git_array_t(char) git_array_generic_t;
+
+/* use a generic array for growth so this can return the new item */
+GIT_INLINE(void *) git_array_grow(void *_a, size_t item_size)
+{
+	volatile git_array_generic_t *a = _a;
+	size_t new_size;
+	char *new_array;
+
+	if (a->size < 8) {
+		new_size = 8;
+	} else {
+		if (GIT_MULTIPLY_SIZET_OVERFLOW(&new_size, a->size, 3))
+			goto on_oom;
+		new_size /= 2;
+	}
+
+	if ((new_array = git__reallocarray(a->ptr, new_size, item_size)) == NULL)
+		goto on_oom;
+
+	a->ptr = new_array; a->asize = new_size; a->size++;
+	return a->ptr + (a->size - 1) * item_size;
+
+on_oom:
+	git_array_clear(*a);
+	return NULL;
+}
+
+#define git_array_alloc(a) \
+	(((a).size >= (a).asize) ? \
+	git_array_grow(&(a), sizeof(*(a).ptr)) : \
+	((a).ptr ? &(a).ptr[(a).size++] : NULL))
+
+#define git_array_last(a) ((a).size ? &(a).ptr[(a).size - 1] : NULL)
+
+#define git_array_pop(a) ((a).size ? &(a).ptr[--(a).size] : NULL)
+
+#define git_array_get(a, i) (((i) < (a).size) ? &(a).ptr[(i)] : NULL)
+
+#define git_array_size(a) (a).size
+
+#define git_array_valid_index(a, i) ((i) < (a).size)
+
+#define git_array_foreach(a, i, element) \
+	for ((i) = 0; (i) < (a).size && ((element) = &(a).ptr[(i)]); (i)++)
+
+GIT_INLINE(int) git_array__search(
+	size_t *out,
+	void *array_ptr,
+	size_t item_size,
+	size_t array_len,
+	int (*compare)(const void *, const void *),
+	const void *key)
+{
+	size_t lim;
+	unsigned char *part, *array = array_ptr, *base = array_ptr;
+	int cmp = -1;
+
+	for (lim = array_len; lim != 0; lim >>= 1) {
+		part = base + (lim >> 1) * item_size;
+		cmp = (*compare)(key, part);
+
+		if (cmp == 0) {
+			base = part;
+			break;
+		}
+		if (cmp > 0) { /* key > p; take right partition */
+			base = part + 1 * item_size;
+			lim--;
+		} /* else take left partition */
+	}
+
+	if (out)
+		*out = (base - array) / item_size;
+
+	return (cmp == 0) ? 0 : GIT_ENOTFOUND;
+}
+
+#define git_array_search(out, a, cmp, key) \
+	git_array__search(out, (a).ptr, sizeof(*(a).ptr), (a).size, \
+		(cmp), (key))
+
+#endif

node_modules/nodegit/vendor/libgit2/src/attr.c

@@ -0,0 +1,578 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "attr.h"
+
+#include "repository.h"
+#include "sysdir.h"
+#include "config.h"
+#include "attr_file.h"
+#include "ignore.h"
+#include "git2/oid.h"
+#include <ctype.h>
+
+const char *git_attr__true  = "[internal]__TRUE__";
+const char *git_attr__false = "[internal]__FALSE__";
+const char *git_attr__unset = "[internal]__UNSET__";
+
+git_attr_value_t git_attr_value(const char *attr)
+{
+	if (attr == NULL || attr == git_attr__unset)
+		return GIT_ATTR_VALUE_UNSPECIFIED;
+
+	if (attr == git_attr__true)
+		return GIT_ATTR_VALUE_TRUE;
+
+	if (attr == git_attr__false)
+		return GIT_ATTR_VALUE_FALSE;
+
+	return GIT_ATTR_VALUE_STRING;
+}
+
+static int collect_attr_files(
+	git_repository *repo,
+	git_attr_session *attr_session,
+	uint32_t flags,
+	const char *path,
+	git_vector *files);
+
+static void release_attr_files(git_vector *files);
+
+int git_attr_get(
+	const char **value,
+	git_repository *repo,
+	uint32_t flags,
+	const char *pathname,
+	const char *name)
+{
+	int error;
+	git_attr_path path;
+	git_vector files = GIT_VECTOR_INIT;
+	size_t i, j;
+	git_attr_file *file;
+	git_attr_name attr;
+	git_attr_rule *rule;
+	git_dir_flag dir_flag = GIT_DIR_FLAG_UNKNOWN;
+
+	assert(value && repo && name);
+
+	*value = NULL;
+
+	if (git_repository_is_bare(repo))
+		dir_flag = GIT_DIR_FLAG_FALSE;
+
+	if (git_attr_path__init(&path, pathname, git_repository_workdir(repo), dir_flag) < 0)
+		return -1;
+
+	if ((error = collect_attr_files(repo, NULL, flags, pathname, &files)) < 0)
+		goto cleanup;
+
+	memset(&attr, 0, sizeof(attr));
+	attr.name = name;
+	attr.name_hash = git_attr_file__name_hash(name);
+
+	git_vector_foreach(&files, i, file) {
+
+		git_attr_file__foreach_matching_rule(file, &path, j, rule) {
+			size_t pos;
+
+			if (!git_vector_bsearch(&pos, &rule->assigns, &attr)) {
+				*value = ((git_attr_assignment *)git_vector_get(
+							  &rule->assigns, pos))->value;
+				goto cleanup;
+			}
+		}
+	}
+
+cleanup:
+	release_attr_files(&files);
+	git_attr_path__free(&path);
+
+	return error;
+}
+
+
+typedef struct {
+	git_attr_name name;
+	git_attr_assignment *found;
+} attr_get_many_info;
+
+int git_attr_get_many_with_session(
+	const char **values,
+	git_repository *repo,
+	git_attr_session *attr_session,
+	uint32_t flags,
+	const char *pathname,
+	size_t num_attr,
+	const char **names)
+{
+	int error;
+	git_attr_path path;
+	git_vector files = GIT_VECTOR_INIT;
+	size_t i, j, k;
+	git_attr_file *file;
+	git_attr_rule *rule;
+	attr_get_many_info *info = NULL;
+	size_t num_found = 0;
+	git_dir_flag dir_flag = GIT_DIR_FLAG_UNKNOWN;
+
+	if (!num_attr)
+		return 0;
+
+	assert(values && repo && names);
+
+	if (git_repository_is_bare(repo))
+		dir_flag = GIT_DIR_FLAG_FALSE;
+
+	if (git_attr_path__init(&path, pathname, git_repository_workdir(repo), dir_flag) < 0)
+		return -1;
+
+	if ((error = collect_attr_files(repo, attr_session, flags, pathname, &files)) < 0)
+		goto cleanup;
+
+	info = git__calloc(num_attr, sizeof(attr_get_many_info));
+	GIT_ERROR_CHECK_ALLOC(info);
+
+	git_vector_foreach(&files, i, file) {
+
+		git_attr_file__foreach_matching_rule(file, &path, j, rule) {
+
+			for (k = 0; k < num_attr; k++) {
+				size_t pos;
+
+				if (info[k].found != NULL) /* already found assignment */
+					continue;
+
+				if (!info[k].name.name) {
+					info[k].name.name = names[k];
+					info[k].name.name_hash = git_attr_file__name_hash(names[k]);
+				}
+
+				if (!git_vector_bsearch(&pos, &rule->assigns, &info[k].name)) {
+					info[k].found = (git_attr_assignment *)
+						git_vector_get(&rule->assigns, pos);
+					values[k] = info[k].found->value;
+
+					if (++num_found == num_attr)
+						goto cleanup;
+				}
+			}
+		}
+	}
+
+	for (k = 0; k < num_attr; k++) {
+		if (!info[k].found)
+			values[k] = NULL;
+	}
+
+cleanup:
+	release_attr_files(&files);
+	git_attr_path__free(&path);
+	git__free(info);
+
+	return error;
+}
+
+int git_attr_get_many(
+	const char **values,
+	git_repository *repo,
+	uint32_t flags,
+	const char *pathname,
+	size_t num_attr,
+	const char **names)
+{
+	return git_attr_get_many_with_session(
+		values, repo, NULL, flags, pathname, num_attr, names);
+}
+
+int git_attr_foreach(
+	git_repository *repo,
+	uint32_t flags,
+	const char *pathname,
+	int (*callback)(const char *name, const char *value, void *payload),
+	void *payload)
+{
+	int error;
+	git_attr_path path;
+	git_vector files = GIT_VECTOR_INIT;
+	size_t i, j, k;
+	git_attr_file *file;
+	git_attr_rule *rule;
+	git_attr_assignment *assign;
+	git_strmap *seen = NULL;
+	git_dir_flag dir_flag = GIT_DIR_FLAG_UNKNOWN;
+
+	assert(repo && callback);
+
+	if (git_repository_is_bare(repo))
+		dir_flag = GIT_DIR_FLAG_FALSE;
+
+	if (git_attr_path__init(&path, pathname, git_repository_workdir(repo), dir_flag) < 0)
+		return -1;
+
+	if ((error = collect_attr_files(repo, NULL, flags, pathname, &files)) < 0 ||
+	    (error = git_strmap_new(&seen)) < 0)
+		goto cleanup;
+
+	git_vector_foreach(&files, i, file) {
+
+		git_attr_file__foreach_matching_rule(file, &path, j, rule) {
+
+			git_vector_foreach(&rule->assigns, k, assign) {
+				/* skip if higher priority assignment was already seen */
+				if (git_strmap_exists(seen, assign->name))
+					continue;
+
+				if ((error = git_strmap_set(seen, assign->name, assign)) < 0)
+					goto cleanup;
+
+				error = callback(assign->name, assign->value, payload);
+				if (error) {
+					git_error_set_after_callback(error);
+					goto cleanup;
+				}
+			}
+		}
+	}
+
+cleanup:
+	git_strmap_free(seen);
+	release_attr_files(&files);
+	git_attr_path__free(&path);
+
+	return error;
+}
+
+static int preload_attr_file(
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_attr_file_source source,
+	const char *base,
+	const char *file,
+	bool allow_macros)
+{
+	int error;
+	git_attr_file *preload = NULL;
+
+	if (!file)
+		return 0;
+	if (!(error = git_attr_cache__get(&preload, repo, attr_session, source, base, file,
+					  git_attr_file__parse_buffer, allow_macros)))
+		git_attr_file__free(preload);
+
+	return error;
+}
+
+static int system_attr_file(
+	git_buf *out,
+	git_attr_session *attr_session)
+{
+	int error;
+
+	if (!attr_session) {
+		error = git_sysdir_find_system_file(out, GIT_ATTR_FILE_SYSTEM);
+
+		if (error == GIT_ENOTFOUND)
+			git_error_clear();
+
+		return error;
+	}
+
+	if (!attr_session->init_sysdir) {
+		error = git_sysdir_find_system_file(&attr_session->sysdir, GIT_ATTR_FILE_SYSTEM);
+
+		if (error == GIT_ENOTFOUND)
+			git_error_clear();
+		else if (error)
+			return error;
+
+		attr_session->init_sysdir = 1;
+	}
+
+	if (attr_session->sysdir.size == 0)
+		return GIT_ENOTFOUND;
+
+	/* We can safely provide a git_buf with no allocation (asize == 0) to
+	 * a consumer. This allows them to treat this as a regular `git_buf`,
+	 * but their call to `git_buf_dispose` will not attempt to free it.
+	 */
+	git_buf_attach_notowned(
+		out, attr_session->sysdir.ptr, attr_session->sysdir.size);
+	return 0;
+}
+
+static int attr_setup(
+	git_repository *repo,
+	git_attr_session *attr_session,
+	uint32_t flags)
+{
+	git_buf path = GIT_BUF_INIT;
+	git_index *idx = NULL;
+	const char *workdir;
+	int error = 0;
+
+	if (attr_session && attr_session->init_setup)
+		return 0;
+
+	if ((error = git_attr_cache__init(repo)) < 0)
+		return error;
+
+	/*
+	 * Preload attribute files that could contain macros so the
+	 * definitions will be available for later file parsing.
+	 */
+
+	if ((error = system_attr_file(&path, attr_session)) < 0 ||
+	    (error = preload_attr_file(repo, attr_session, GIT_ATTR_FILE__FROM_FILE,
+				       NULL, path.ptr, true)) < 0) {
+		if (error != GIT_ENOTFOUND)
+			goto out;
+	}
+
+	if ((error = preload_attr_file(repo, attr_session, GIT_ATTR_FILE__FROM_FILE,
+				       NULL, git_repository_attr_cache(repo)->cfg_attr_file, true)) < 0)
+		goto out;
+
+	git_buf_clear(&path); /* git_repository_item_path expects an empty buffer, because it uses git_buf_set */
+	if ((error = git_repository_item_path(&path, repo, GIT_REPOSITORY_ITEM_INFO)) < 0 ||
+	    (error = preload_attr_file(repo, attr_session, GIT_ATTR_FILE__FROM_FILE,
+				       path.ptr, GIT_ATTR_FILE_INREPO, true)) < 0) {
+		if (error != GIT_ENOTFOUND)
+			goto out;
+	}
+
+	if ((workdir = git_repository_workdir(repo)) != NULL &&
+	    (error = preload_attr_file(repo, attr_session, GIT_ATTR_FILE__FROM_FILE,
+				       workdir, GIT_ATTR_FILE, true)) < 0)
+			goto out;
+
+	if ((error = git_repository_index__weakptr(&idx, repo)) < 0 ||
+	    (error = preload_attr_file(repo, attr_session, GIT_ATTR_FILE__FROM_INDEX,
+				       NULL, GIT_ATTR_FILE, true)) < 0)
+			goto out;
+
+	if ((flags & GIT_ATTR_CHECK_INCLUDE_HEAD) != 0 &&
+	    (error = preload_attr_file(repo, attr_session, GIT_ATTR_FILE__FROM_HEAD,
+				       NULL, GIT_ATTR_FILE, true)) < 0)
+		goto out;
+
+	if (attr_session)
+		attr_session->init_setup = 1;
+
+out:
+	git_buf_dispose(&path);
+
+	return error;
+}
+
+int git_attr_add_macro(
+	git_repository *repo,
+	const char *name,
+	const char *values)
+{
+	int error;
+	git_attr_rule *macro = NULL;
+	git_pool *pool;
+
+	if ((error = git_attr_cache__init(repo)) < 0)
+		return error;
+
+	macro = git__calloc(1, sizeof(git_attr_rule));
+	GIT_ERROR_CHECK_ALLOC(macro);
+
+	pool = &git_repository_attr_cache(repo)->pool;
+
+	macro->match.pattern = git_pool_strdup(pool, name);
+	GIT_ERROR_CHECK_ALLOC(macro->match.pattern);
+
+	macro->match.length = strlen(macro->match.pattern);
+	macro->match.flags = GIT_ATTR_FNMATCH_MACRO;
+
+	error = git_attr_assignment__parse(repo, pool, &macro->assigns, &values);
+
+	if (!error)
+		error = git_attr_cache__insert_macro(repo, macro);
+
+	if (error < 0)
+		git_attr_rule__free(macro);
+
+	return error;
+}
+
+typedef struct {
+	git_repository *repo;
+	git_attr_session *attr_session;
+	uint32_t flags;
+	const char *workdir;
+	git_index *index;
+	git_vector *files;
+} attr_walk_up_info;
+
+static int attr_decide_sources(
+	uint32_t flags, bool has_wd, bool has_index, git_attr_file_source *srcs)
+{
+	int count = 0;
+
+	switch (flags & 0x03) {
+	case GIT_ATTR_CHECK_FILE_THEN_INDEX:
+		if (has_wd)
+			srcs[count++] = GIT_ATTR_FILE__FROM_FILE;
+		if (has_index)
+			srcs[count++] = GIT_ATTR_FILE__FROM_INDEX;
+		break;
+	case GIT_ATTR_CHECK_INDEX_THEN_FILE:
+		if (has_index)
+			srcs[count++] = GIT_ATTR_FILE__FROM_INDEX;
+		if (has_wd)
+			srcs[count++] = GIT_ATTR_FILE__FROM_FILE;
+		break;
+	case GIT_ATTR_CHECK_INDEX_ONLY:
+		if (has_index)
+			srcs[count++] = GIT_ATTR_FILE__FROM_INDEX;
+		break;
+	}
+
+	if ((flags & GIT_ATTR_CHECK_INCLUDE_HEAD) != 0)
+		srcs[count++] = GIT_ATTR_FILE__FROM_HEAD;
+
+	return count;
+}
+
+static int push_attr_file(
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_vector *list,
+	git_attr_file_source source,
+	const char *base,
+	const char *filename,
+	bool allow_macros)
+{
+	int error = 0;
+	git_attr_file *file = NULL;
+
+	error = git_attr_cache__get(&file, repo, attr_session,
+		source, base, filename, git_attr_file__parse_buffer, allow_macros);
+
+	if (error < 0)
+		return error;
+
+	if (file != NULL) {
+		if ((error = git_vector_insert(list, file)) < 0)
+			git_attr_file__free(file);
+	}
+
+	return error;
+}
+
+static int push_one_attr(void *ref, const char *path)
+{
+	attr_walk_up_info *info = (attr_walk_up_info *)ref;
+	git_attr_file_source src[GIT_ATTR_FILE_NUM_SOURCES];
+	int error = 0, n_src, i;
+	bool allow_macros;
+
+	n_src = attr_decide_sources(
+		info->flags, info->workdir != NULL, info->index != NULL, src);
+	allow_macros = info->workdir ? !strcmp(info->workdir, path) : false;
+
+	for (i = 0; !error && i < n_src; ++i)
+		error = push_attr_file(info->repo, info->attr_session, info->files,
+				       src[i], path, GIT_ATTR_FILE, allow_macros);
+
+	return error;
+}
+
+static void release_attr_files(git_vector *files)
+{
+	size_t i;
+	git_attr_file *file;
+
+	git_vector_foreach(files, i, file) {
+		git_attr_file__free(file);
+		files->contents[i] = NULL;
+	}
+	git_vector_free(files);
+}
+
+static int collect_attr_files(
+	git_repository *repo,
+	git_attr_session *attr_session,
+	uint32_t flags,
+	const char *path,
+	git_vector *files)
+{
+	int error = 0;
+	git_buf dir = GIT_BUF_INIT, attrfile = GIT_BUF_INIT;
+	const char *workdir = git_repository_workdir(repo);
+	attr_walk_up_info info = { NULL };
+
+	if ((error = attr_setup(repo, attr_session, flags)) < 0)
+		return error;
+
+	/* Resolve path in a non-bare repo */
+	if (workdir != NULL)
+		error = git_path_find_dir(&dir, path, workdir);
+	else
+		error = git_path_dirname_r(&dir, path);
+	if (error < 0)
+		goto cleanup;
+
+	/* in precendence order highest to lowest:
+	 * - $GIT_DIR/info/attributes
+	 * - path components with .gitattributes
+	 * - config core.attributesfile
+	 * - $GIT_PREFIX/etc/gitattributes
+	 */
+
+	if ((error = git_repository_item_path(&attrfile, repo, GIT_REPOSITORY_ITEM_INFO)) < 0 ||
+	    (error = push_attr_file(repo, attr_session, files, GIT_ATTR_FILE__FROM_FILE,
+				    attrfile.ptr, GIT_ATTR_FILE_INREPO, true)) < 0) {
+		if (error != GIT_ENOTFOUND)
+			goto cleanup;
+	}
+
+	info.repo = repo;
+	info.attr_session = attr_session;
+	info.flags = flags;
+	info.workdir = workdir;
+	if (git_repository_index__weakptr(&info.index, repo) < 0)
+		git_error_clear(); /* no error even if there is no index */
+	info.files = files;
+
+	if (!strcmp(dir.ptr, "."))
+		error = push_one_attr(&info, "");
+	else
+		error = git_path_walk_up(&dir, workdir, push_one_attr, &info);
+
+	if (error < 0)
+		goto cleanup;
+
+	if (git_repository_attr_cache(repo)->cfg_attr_file != NULL) {
+		error = push_attr_file(repo, attr_session, files, GIT_ATTR_FILE__FROM_FILE,
+				       NULL, git_repository_attr_cache(repo)->cfg_attr_file, true);
+		if (error < 0)
+			goto cleanup;
+	}
+
+	if ((flags & GIT_ATTR_CHECK_NO_SYSTEM) == 0) {
+		error = system_attr_file(&dir, attr_session);
+
+		if (!error)
+			error = push_attr_file(repo, attr_session, files, GIT_ATTR_FILE__FROM_FILE,
+					       NULL, dir.ptr, true);
+		else if (error == GIT_ENOTFOUND)
+			error = 0;
+	}
+
+ cleanup:
+	if (error < 0)
+		release_attr_files(files);
+	git_buf_dispose(&attrfile);
+	git_buf_dispose(&dir);
+
+	return error;
+}

node_modules/nodegit/vendor/libgit2/src/attr.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_attr_h__
+#define INCLUDE_attr_h__
+
+#include "common.h"
+
+#include "attr_file.h"
+#include "attrcache.h"
+
+#endif

node_modules/nodegit/vendor/libgit2/src/attr_file.c

@@ -0,0 +1,969 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "attr_file.h"
+
+#include "repository.h"
+#include "filebuf.h"
+#include "attrcache.h"
+#include "buf_text.h"
+#include "git2/blob.h"
+#include "git2/tree.h"
+#include "blob.h"
+#include "index.h"
+#include "wildmatch.h"
+#include <ctype.h>
+
+static void attr_file_free(git_attr_file *file)
+{
+	bool unlock = !git_mutex_lock(&file->lock);
+	git_attr_file__clear_rules(file, false);
+	git_pool_clear(&file->pool);
+	if (unlock)
+		git_mutex_unlock(&file->lock);
+	git_mutex_free(&file->lock);
+
+	git__memzero(file, sizeof(*file));
+	git__free(file);
+}
+
+int git_attr_file__new(
+	git_attr_file **out,
+	git_attr_file_entry *entry,
+	git_attr_file_source source)
+{
+	git_attr_file *attrs = git__calloc(1, sizeof(git_attr_file));
+	GIT_ERROR_CHECK_ALLOC(attrs);
+
+	if (git_mutex_init(&attrs->lock) < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to initialize lock");
+		git__free(attrs);
+		return -1;
+	}
+
+	git_pool_init(&attrs->pool, 1);
+	GIT_REFCOUNT_INC(attrs);
+	attrs->entry  = entry;
+	attrs->source = source;
+	*out = attrs;
+	return 0;
+}
+
+int git_attr_file__clear_rules(git_attr_file *file, bool need_lock)
+{
+	unsigned int i;
+	git_attr_rule *rule;
+
+	if (need_lock && git_mutex_lock(&file->lock) < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to lock attribute file");
+		return -1;
+	}
+
+	git_vector_foreach(&file->rules, i, rule)
+		git_attr_rule__free(rule);
+	git_vector_free(&file->rules);
+
+	if (need_lock)
+		git_mutex_unlock(&file->lock);
+
+	return 0;
+}
+
+void git_attr_file__free(git_attr_file *file)
+{
+	if (!file)
+		return;
+	GIT_REFCOUNT_DEC(file, attr_file_free);
+}
+
+static int attr_file_oid_from_index(
+	git_oid *oid, git_repository *repo, const char *path)
+{
+	int error;
+	git_index *idx;
+	size_t pos;
+	const git_index_entry *entry;
+
+	if ((error = git_repository_index__weakptr(&idx, repo)) < 0 ||
+		(error = git_index__find_pos(&pos, idx, path, 0, 0)) < 0)
+		return error;
+
+	if (!(entry = git_index_get_byindex(idx, pos)))
+		return GIT_ENOTFOUND;
+
+	*oid = entry->id;
+	return 0;
+}
+
+int git_attr_file__load(
+	git_attr_file **out,
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_attr_file_entry *entry,
+	git_attr_file_source source,
+	git_attr_file_parser parser,
+	bool allow_macros)
+{
+	int error = 0;
+	git_tree *tree = NULL;
+	git_tree_entry *tree_entry = NULL;
+	git_blob *blob = NULL;
+	git_buf content = GIT_BUF_INIT;
+	const char *content_str;
+	git_attr_file *file;
+	struct stat st;
+	bool nonexistent = false;
+	int bom_offset;
+	git_bom_t bom;
+	git_oid id;
+	git_object_size_t blobsize;
+
+	*out = NULL;
+
+	switch (source) {
+	case GIT_ATTR_FILE__IN_MEMORY:
+		/* in-memory attribute file doesn't need data */
+		break;
+	case GIT_ATTR_FILE__FROM_INDEX: {
+		if ((error = attr_file_oid_from_index(&id, repo, entry->path)) < 0 ||
+			(error = git_blob_lookup(&blob, repo, &id)) < 0)
+			return error;
+
+		/* Do not assume that data straight from the ODB is NULL-terminated;
+		 * copy the contents of a file to a buffer to work on */
+		blobsize = git_blob_rawsize(blob);
+
+		GIT_ERROR_CHECK_BLOBSIZE(blobsize);
+		git_buf_put(&content, git_blob_rawcontent(blob), (size_t)blobsize);
+		break;
+	}
+	case GIT_ATTR_FILE__FROM_FILE: {
+		int fd = -1;
+
+		/* For open or read errors, pretend that we got ENOTFOUND. */
+		/* TODO: issue warning when warning API is available */
+
+		if (p_stat(entry->fullpath, &st) < 0 ||
+			S_ISDIR(st.st_mode) ||
+			(fd = git_futils_open_ro(entry->fullpath)) < 0 ||
+			(error = git_futils_readbuffer_fd(&content, fd, (size_t)st.st_size)) < 0)
+			nonexistent = true;
+
+		if (fd >= 0)
+			p_close(fd);
+
+		break;
+	}
+	case GIT_ATTR_FILE__FROM_HEAD: {
+		if ((error = git_repository_head_tree(&tree, repo)) < 0 ||
+		    (error = git_tree_entry_bypath(&tree_entry, tree, entry->path)) < 0 ||
+		    (error = git_blob_lookup(&blob, repo, git_tree_entry_id(tree_entry))) < 0)
+			goto cleanup;
+
+		/*
+		 * Do not assume that data straight from the ODB is NULL-terminated;
+		 * copy the contents of a file to a buffer to work on.
+		 */
+		blobsize = git_blob_rawsize(blob);
+
+		GIT_ERROR_CHECK_BLOBSIZE(blobsize);
+		if ((error = git_buf_put(&content,
+			git_blob_rawcontent(blob), (size_t)blobsize)) < 0)
+			goto cleanup;
+
+		break;
+	}
+	default:
+		git_error_set(GIT_ERROR_INVALID, "unknown file source %d", source);
+		return -1;
+	}
+
+	if ((error = git_attr_file__new(&file, entry, source)) < 0)
+		goto cleanup;
+
+	/* advance over a UTF8 BOM */
+	content_str = git_buf_cstr(&content);
+	bom_offset = git_buf_text_detect_bom(&bom, &content);
+
+	if (bom == GIT_BOM_UTF8)
+		content_str += bom_offset;
+
+	/* store the key of the attr_reader; don't bother with cache
+	 * invalidation during the same attr reader session.
+	 */
+	if (attr_session)
+		file->session_key = attr_session->key;
+
+	if (parser && (error = parser(repo, file, content_str, allow_macros)) < 0) {
+		git_attr_file__free(file);
+		goto cleanup;
+	}
+
+	/* write cache breakers */
+	if (nonexistent)
+		file->nonexistent = 1;
+	else if (source == GIT_ATTR_FILE__FROM_INDEX)
+		git_oid_cpy(&file->cache_data.oid, git_blob_id(blob));
+	else if (source == GIT_ATTR_FILE__FROM_HEAD)
+		git_oid_cpy(&file->cache_data.oid, git_tree_id(tree));
+	else if (source == GIT_ATTR_FILE__FROM_FILE)
+		git_futils_filestamp_set_from_stat(&file->cache_data.stamp, &st);
+	/* else always cacheable */
+
+	*out = file;
+
+cleanup:
+	git_blob_free(blob);
+	git_tree_entry_free(tree_entry);
+	git_tree_free(tree);
+	git_buf_dispose(&content);
+
+	return error;
+}
+
+int git_attr_file__out_of_date(
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_attr_file *file)
+{
+	if (!file)
+		return 1;
+
+	/* we are never out of date if we just created this data in the same
+	 * attr_session; otherwise, nonexistent files must be invalidated
+	 */
+	if (attr_session && attr_session->key == file->session_key)
+		return 0;
+	else if (file->nonexistent)
+		return 1;
+
+	switch (file->source) {
+	case GIT_ATTR_FILE__IN_MEMORY:
+		return 0;
+
+	case GIT_ATTR_FILE__FROM_FILE:
+		return git_futils_filestamp_check(
+			&file->cache_data.stamp, file->entry->fullpath);
+
+	case GIT_ATTR_FILE__FROM_INDEX: {
+		int error;
+		git_oid id;
+
+		if ((error = attr_file_oid_from_index(
+				&id, repo, file->entry->path)) < 0)
+			return error;
+
+		return (git_oid__cmp(&file->cache_data.oid, &id) != 0);
+	}
+
+	case GIT_ATTR_FILE__FROM_HEAD: {
+		git_tree *tree;
+		int error;
+
+		if ((error = git_repository_head_tree(&tree, repo)) < 0)
+			return error;
+
+		error = git_oid__cmp(&file->cache_data.oid, git_tree_id(tree));
+
+		git_tree_free(tree);
+		return error;
+	}
+
+	default:
+		git_error_set(GIT_ERROR_INVALID, "invalid file type %d", file->source);
+		return -1;
+	}
+}
+
+static int sort_by_hash_and_name(const void *a_raw, const void *b_raw);
+static void git_attr_rule__clear(git_attr_rule *rule);
+static bool parse_optimized_patterns(
+	git_attr_fnmatch *spec,
+	git_pool *pool,
+	const char *pattern);
+
+int git_attr_file__parse_buffer(
+	git_repository *repo, git_attr_file *attrs, const char *data, bool allow_macros)
+{
+	const char *scan = data, *context = NULL;
+	git_attr_rule *rule = NULL;
+	int error = 0;
+
+	/* If subdir file path, convert context for file paths */
+	if (attrs->entry && git_path_root(attrs->entry->path) < 0 &&
+	    !git__suffixcmp(attrs->entry->path, "/" GIT_ATTR_FILE))
+		context = attrs->entry->path;
+
+	if (git_mutex_lock(&attrs->lock) < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to lock attribute file");
+		return -1;
+	}
+
+	while (!error && *scan) {
+		/* Allocate rule if needed, otherwise re-use previous rule */
+		if (!rule) {
+			rule = git__calloc(1, sizeof(*rule));
+			GIT_ERROR_CHECK_ALLOC(rule);
+		} else
+			git_attr_rule__clear(rule);
+
+		rule->match.flags = GIT_ATTR_FNMATCH_ALLOWNEG | GIT_ATTR_FNMATCH_ALLOWMACRO;
+
+		/* Parse the next "pattern attr attr attr" line */
+		if ((error = git_attr_fnmatch__parse(&rule->match, &attrs->pool, context, &scan)) < 0 ||
+		    (error = git_attr_assignment__parse(repo, &attrs->pool, &rule->assigns, &scan)) < 0)
+		{
+			if (error != GIT_ENOTFOUND)
+				goto out;
+			error = 0;
+			continue;
+		}
+
+		if (rule->match.flags & GIT_ATTR_FNMATCH_MACRO) {
+			/* TODO: warning if macro found in file below repo root */
+			if (!allow_macros)
+				continue;
+			if ((error = git_attr_cache__insert_macro(repo, rule)) < 0)
+				goto out;
+		} else if ((error = git_vector_insert(&attrs->rules, rule)) < 0)
+			goto out;
+
+		rule = NULL;
+	}
+
+out:
+	git_mutex_unlock(&attrs->lock);
+	git_attr_rule__free(rule);
+
+	return error;
+}
+
+uint32_t git_attr_file__name_hash(const char *name)
+{
+	uint32_t h = 5381;
+	int c;
+	assert(name);
+	while ((c = (int)*name++) != 0)
+		h = ((h << 5) + h) + c;
+	return h;
+}
+
+int git_attr_file__lookup_one(
+	git_attr_file *file,
+	git_attr_path *path,
+	const char *attr,
+	const char **value)
+{
+	size_t i;
+	git_attr_name name;
+	git_attr_rule *rule;
+
+	*value = NULL;
+
+	name.name = attr;
+	name.name_hash = git_attr_file__name_hash(attr);
+
+	git_attr_file__foreach_matching_rule(file, path, i, rule) {
+		size_t pos;
+
+		if (!git_vector_bsearch(&pos, &rule->assigns, &name)) {
+			*value = ((git_attr_assignment *)
+					  git_vector_get(&rule->assigns, pos))->value;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+int git_attr_file__load_standalone(git_attr_file **out, const char *path)
+{
+	git_buf content = GIT_BUF_INIT;
+	git_attr_file *file = NULL;
+	int error;
+
+	if ((error = git_futils_readbuffer(&content, path)) < 0)
+		goto out;
+
+	/*
+	 * Because the cache entry is allocated from the file's own pool, we
+	 * don't have to free it - freeing file+pool will free cache entry, too.
+	 */
+
+	if ((error = git_attr_file__new(&file, NULL, GIT_ATTR_FILE__FROM_FILE)) < 0 ||
+	    (error = git_attr_file__parse_buffer(NULL, file, content.ptr, true)) < 0 ||
+	    (error = git_attr_cache__alloc_file_entry(&file->entry, NULL, path, &file->pool)) < 0)
+		goto out;
+
+	*out = file;
+out:
+	if (error < 0)
+		git_attr_file__free(file);
+	git_buf_dispose(&content);
+
+	return error;
+}
+
+bool git_attr_fnmatch__match(
+	git_attr_fnmatch *match,
+	git_attr_path *path)
+{
+	const char *relpath = path->path;
+	const char *filename;
+	int flags = 0;
+
+	/*
+	 * If the rule was generated in a subdirectory, we must only
+	 * use it for paths inside that directory. We can thus return
+	 * a non-match if the prefixes don't match.
+	 */
+	if (match->containing_dir) {
+		if (match->flags & GIT_ATTR_FNMATCH_ICASE) {
+			if (git__strncasecmp(path->path, match->containing_dir, match->containing_dir_length))
+				return 0;
+		} else {
+			if (git__prefixcmp(path->path, match->containing_dir))
+				return 0;
+		}
+
+		relpath += match->containing_dir_length;
+	}
+
+	if (match->flags & GIT_ATTR_FNMATCH_ICASE)
+		flags |= WM_CASEFOLD;
+
+	if (match->flags & GIT_ATTR_FNMATCH_FULLPATH) {
+		filename = relpath;
+		flags |= WM_PATHNAME;
+	} else {
+		filename = path->basename;
+	}
+
+	if ((match->flags & GIT_ATTR_FNMATCH_DIRECTORY) && !path->is_dir) {
+		bool samename;
+
+		/*
+		 * for attribute checks or checks at the root of this match's
+		 * containing_dir (or root of the repository if no containing_dir),
+		 * do not match.
+		 */
+		if (!(match->flags & GIT_ATTR_FNMATCH_IGNORE) ||
+			path->basename == relpath)
+			return false;
+
+		/* fail match if this is a file with same name as ignored folder */
+		samename = (match->flags & GIT_ATTR_FNMATCH_ICASE) ?
+			!strcasecmp(match->pattern, relpath) :
+			!strcmp(match->pattern, relpath);
+
+		if (samename)
+			return false;
+
+		return (wildmatch(match->pattern, relpath, flags) == WM_MATCH);
+	}
+
+	return (wildmatch(match->pattern, filename, flags) == WM_MATCH);
+}
+
+bool git_attr_rule__match(
+	git_attr_rule *rule,
+	git_attr_path *path)
+{
+	bool matched = git_attr_fnmatch__match(&rule->match, path);
+
+	if (rule->match.flags & GIT_ATTR_FNMATCH_NEGATIVE)
+		matched = !matched;
+
+	return matched;
+}
+
+git_attr_assignment *git_attr_rule__lookup_assignment(
+	git_attr_rule *rule, const char *name)
+{
+	size_t pos;
+	git_attr_name key;
+	key.name = name;
+	key.name_hash = git_attr_file__name_hash(name);
+
+	if (git_vector_bsearch(&pos, &rule->assigns, &key))
+		return NULL;
+
+	return git_vector_get(&rule->assigns, pos);
+}
+
+int git_attr_path__init(
+	git_attr_path *info, const char *path, const char *base, git_dir_flag dir_flag)
+{
+	ssize_t root;
+
+	/* build full path as best we can */
+	git_buf_init(&info->full, 0);
+
+	if (git_path_join_unrooted(&info->full, path, base, &root) < 0)
+		return -1;
+
+	info->path = info->full.ptr + root;
+
+	/* remove trailing slashes */
+	while (info->full.size > 0) {
+		if (info->full.ptr[info->full.size - 1] != '/')
+			break;
+		info->full.size--;
+	}
+	info->full.ptr[info->full.size] = '\0';
+
+	/* skip leading slashes in path */
+	while (*info->path == '/')
+		info->path++;
+
+	/* find trailing basename component */
+	info->basename = strrchr(info->path, '/');
+	if (info->basename)
+		info->basename++;
+	if (!info->basename || !*info->basename)
+		info->basename = info->path;
+
+	switch (dir_flag)
+	{
+	case GIT_DIR_FLAG_FALSE:
+		info->is_dir = 0;
+		break;
+
+	case GIT_DIR_FLAG_TRUE:
+		info->is_dir = 1;
+		break;
+
+	case GIT_DIR_FLAG_UNKNOWN:
+	default:
+		info->is_dir = (int)git_path_isdir(info->full.ptr);
+		break;
+	}
+
+	return 0;
+}
+
+void git_attr_path__free(git_attr_path *info)
+{
+	git_buf_dispose(&info->full);
+	info->path = NULL;
+	info->basename = NULL;
+}
+
+/*
+ * From gitattributes(5):
+ *
+ * Patterns have the following format:
+ *
+ * - A blank line matches no files, so it can serve as a separator for
+ *   readability.
+ *
+ * - A line starting with # serves as a comment.
+ *
+ * - An optional prefix ! which negates the pattern; any matching file
+ *   excluded by a previous pattern will become included again. If a negated
+ *   pattern matches, this will override lower precedence patterns sources.
+ *
+ * - If the pattern ends with a slash, it is removed for the purpose of the
+ *   following description, but it would only find a match with a directory. In
+ *   other words, foo/ will match a directory foo and paths underneath it, but
+ *   will not match a regular file or a symbolic link foo (this is consistent
+ *   with the way how pathspec works in general in git).
+ *
+ * - If the pattern does not contain a slash /, git treats it as a shell glob
+ *   pattern and checks for a match against the pathname without leading
+ *   directories.
+ *
+ * - Otherwise, git treats the pattern as a shell glob suitable for consumption
+ *   by fnmatch(3) with the FNM_PATHNAME flag: wildcards in the pattern will
+ *   not match a / in the pathname. For example, "Documentation/\*.html" matches
+ *   "Documentation/git.html" but not "Documentation/ppc/ppc.html". A leading
+ *   slash matches the beginning of the pathname; for example, "/\*.c" matches
+ *   "cat-file.c" but not "mozilla-sha1/sha1.c".
+ */
+
+/*
+ * Determine the length of trailing spaces. Escaped spaces do not count as
+ * trailing whitespace.
+ */
+static size_t trailing_space_length(const char *p, size_t len)
+{
+	size_t n, i;
+	for (n = len; n; n--) {
+		if (p[n-1] != ' ' && p[n-1] != '\t')
+			break;
+
+		/*
+		 * Count escape-characters before space. In case where it's an
+		 * even number of escape characters, then the escape char itself
+		 * is escaped and the whitespace is an unescaped whitespace.
+		 * Otherwise, the last escape char is not escaped and the
+		 * whitespace in an escaped whitespace.
+		 */
+		i = n;
+		while (i > 1 && p[i-2] == '\\')
+			i--;
+		if ((n - i) % 2)
+			break;
+	}
+	return len - n;
+}
+
+static size_t unescape_spaces(char *str)
+{
+	char *scan, *pos = str;
+	bool escaped = false;
+
+	if (!str)
+		return 0;
+
+	for (scan = str; *scan; scan++) {
+		if (!escaped && *scan == '\\') {
+			escaped = true;
+			continue;
+		}
+
+		/* Only insert the escape character for escaped non-spaces */
+		if (escaped && !git__isspace(*scan))
+			*pos++ = '\\';
+
+		*pos++ = *scan;
+		escaped = false;
+	}
+
+	if (pos != scan)
+		*pos = '\0';
+
+	return (pos - str);
+}
+
+/*
+ * This will return 0 if the spec was filled out,
+ * GIT_ENOTFOUND if the fnmatch does not require matching, or
+ * another error code there was an actual problem.
+ */
+int git_attr_fnmatch__parse(
+	git_attr_fnmatch *spec,
+	git_pool *pool,
+	const char *context,
+	const char **base)
+{
+	const char *pattern, *scan;
+	int slash_count, allow_space;
+	bool escaped;
+
+	assert(spec && base && *base);
+
+	if (parse_optimized_patterns(spec, pool, *base))
+		return 0;
+
+	spec->flags = (spec->flags & GIT_ATTR_FNMATCH__INCOMING);
+	allow_space = ((spec->flags & GIT_ATTR_FNMATCH_ALLOWSPACE) != 0);
+
+	pattern = *base;
+
+	while (!allow_space && git__isspace(*pattern))
+		pattern++;
+
+	if (!*pattern || *pattern == '#' || *pattern == '\n' ||
+	    (*pattern == '\r' && *(pattern + 1) == '\n')) {
+		*base = git__next_line(pattern);
+		return GIT_ENOTFOUND;
+	}
+
+	if (*pattern == '[' && (spec->flags & GIT_ATTR_FNMATCH_ALLOWMACRO) != 0) {
+		if (strncmp(pattern, "[attr]", 6) == 0) {
+			spec->flags = spec->flags | GIT_ATTR_FNMATCH_MACRO;
+			pattern += 6;
+		}
+		/* else a character range like [a-e]* which is accepted */
+	}
+
+	if (*pattern == '!' && (spec->flags & GIT_ATTR_FNMATCH_ALLOWNEG) != 0) {
+		spec->flags = spec->flags | GIT_ATTR_FNMATCH_NEGATIVE;
+		pattern++;
+	}
+
+	slash_count = 0;
+	escaped = false;
+	/* Scan until a non-escaped whitespace. */
+	for (scan = pattern; *scan != '\0'; ++scan) {
+		char c = *scan;
+
+		if (c == '\\' && !escaped) {
+			escaped = true;
+			continue;
+		} else if (git__isspace(c) && !escaped) {
+			if (!allow_space || (c != ' ' && c != '\t' && c != '\r'))
+				break;
+		} else if (c == '/') {
+			spec->flags = spec->flags | GIT_ATTR_FNMATCH_FULLPATH;
+			slash_count++;
+
+			if (slash_count == 1 && pattern == scan)
+				pattern++;
+		} else if (git__iswildcard(c) && !escaped) {
+			/* remember if we see an unescaped wildcard in pattern */
+			spec->flags = spec->flags | GIT_ATTR_FNMATCH_HASWILD;
+		}
+
+		escaped = false;
+	}
+
+	*base = scan;
+
+	if ((spec->length = scan - pattern) == 0)
+		return GIT_ENOTFOUND;
+
+	/*
+	 * Remove one trailing \r in case this is a CRLF delimited
+	 * file, in the case of Icon\r\r\n, we still leave the first
+	 * \r there to match against.
+	 */
+	if (pattern[spec->length - 1] == '\r')
+		if (--spec->length == 0)
+			return GIT_ENOTFOUND;
+
+	/* Remove trailing spaces. */
+	spec->length -= trailing_space_length(pattern, spec->length);
+
+	if (spec->length == 0)
+		return GIT_ENOTFOUND;
+
+	if (pattern[spec->length - 1] == '/') {
+		spec->length--;
+		spec->flags = spec->flags | GIT_ATTR_FNMATCH_DIRECTORY;
+		if (--slash_count <= 0)
+			spec->flags = spec->flags & ~GIT_ATTR_FNMATCH_FULLPATH;
+	}
+
+	if (context) {
+		char *slash = strrchr(context, '/');
+		size_t len;
+		if (slash) {
+			/* include the slash for easier matching */
+			len = slash - context + 1;
+			spec->containing_dir = git_pool_strndup(pool, context, len);
+			spec->containing_dir_length = len;
+		}
+	}
+
+	spec->pattern = git_pool_strndup(pool, pattern, spec->length);
+
+	if (!spec->pattern) {
+		*base = git__next_line(pattern);
+		return -1;
+	} else {
+		/* strip '\' that might have been used for internal whitespace */
+		spec->length = unescape_spaces(spec->pattern);
+	}
+
+	return 0;
+}
+
+static bool parse_optimized_patterns(
+	git_attr_fnmatch *spec,
+	git_pool *pool,
+	const char *pattern)
+{
+	if (!pattern[1] && (pattern[0] == '*' || pattern[0] == '.')) {
+		spec->flags = GIT_ATTR_FNMATCH_MATCH_ALL;
+		spec->pattern = git_pool_strndup(pool, pattern, 1);
+		spec->length = 1;
+
+		return true;
+	}
+
+	return false;
+}
+
+static int sort_by_hash_and_name(const void *a_raw, const void *b_raw)
+{
+	const git_attr_name *a = a_raw;
+	const git_attr_name *b = b_raw;
+
+	if (b->name_hash < a->name_hash)
+		return 1;
+	else if (b->name_hash > a->name_hash)
+		return -1;
+	else
+		return strcmp(b->name, a->name);
+}
+
+static void git_attr_assignment__free(git_attr_assignment *assign)
+{
+	/* name and value are stored in a git_pool associated with the
+	 * git_attr_file, so they do not need to be freed here
+	 */
+	assign->name = NULL;
+	assign->value = NULL;
+	git__free(assign);
+}
+
+static int merge_assignments(void **old_raw, void *new_raw)
+{
+	git_attr_assignment **old = (git_attr_assignment **)old_raw;
+	git_attr_assignment *new = (git_attr_assignment *)new_raw;
+
+	GIT_REFCOUNT_DEC(*old, git_attr_assignment__free);
+	*old = new;
+	return GIT_EEXISTS;
+}
+
+int git_attr_assignment__parse(
+	git_repository *repo,
+	git_pool *pool,
+	git_vector *assigns,
+	const char **base)
+{
+	int error;
+	const char *scan = *base;
+	git_attr_assignment *assign = NULL;
+
+	assert(assigns && !assigns->length);
+
+	git_vector_set_cmp(assigns, sort_by_hash_and_name);
+
+	while (*scan && *scan != '\n') {
+		const char *name_start, *value_start;
+
+		/* skip leading blanks */
+		while (git__isspace(*scan) && *scan != '\n') scan++;
+
+		/* allocate assign if needed */
+		if (!assign) {
+			assign = git__calloc(1, sizeof(git_attr_assignment));
+			GIT_ERROR_CHECK_ALLOC(assign);
+			GIT_REFCOUNT_INC(assign);
+		}
+
+		assign->name_hash = 5381;
+		assign->value = git_attr__true;
+
+		/* look for magic name prefixes */
+		if (*scan == '-') {
+			assign->value = git_attr__false;
+			scan++;
+		} else if (*scan == '!') {
+			assign->value = git_attr__unset; /* explicit unspecified state */
+			scan++;
+		} else if (*scan == '#') /* comment rest of line */
+			break;
+
+		/* find the name */
+		name_start = scan;
+		while (*scan && !git__isspace(*scan) && *scan != '=') {
+			assign->name_hash =
+				((assign->name_hash << 5) + assign->name_hash) + *scan;
+			scan++;
+		}
+		if (scan == name_start) {
+			/* must have found lone prefix (" - ") or leading = ("=foo")
+			 * or end of buffer -- advance until whitespace and continue
+			 */
+			while (*scan && !git__isspace(*scan)) scan++;
+			continue;
+		}
+
+		/* allocate permanent storage for name */
+		assign->name = git_pool_strndup(pool, name_start, scan - name_start);
+		GIT_ERROR_CHECK_ALLOC(assign->name);
+
+		/* if there is an equals sign, find the value */
+		if (*scan == '=') {
+			for (value_start = ++scan; *scan && !git__isspace(*scan); ++scan);
+
+			/* if we found a value, allocate permanent storage for it */
+			if (scan > value_start) {
+				assign->value = git_pool_strndup(pool, value_start, scan - value_start);
+				GIT_ERROR_CHECK_ALLOC(assign->value);
+			}
+		}
+
+		/* expand macros (if given a repo with a macro cache) */
+		if (repo != NULL && assign->value == git_attr__true) {
+			git_attr_rule *macro =
+				git_attr_cache__lookup_macro(repo, assign->name);
+
+			if (macro != NULL) {
+				unsigned int i;
+				git_attr_assignment *massign;
+
+				git_vector_foreach(&macro->assigns, i, massign) {
+					GIT_REFCOUNT_INC(massign);
+
+					error = git_vector_insert_sorted(
+						assigns, massign, &merge_assignments);
+					if (error < 0 && error != GIT_EEXISTS) {
+						git_attr_assignment__free(assign);
+						return error;
+					}
+				}
+			}
+		}
+
+		/* insert allocated assign into vector */
+		error = git_vector_insert_sorted(assigns, assign, &merge_assignments);
+		if (error < 0 && error != GIT_EEXISTS)
+			return error;
+
+		/* clear assign since it is now "owned" by the vector */
+		assign = NULL;
+	}
+
+	if (assign != NULL)
+		git_attr_assignment__free(assign);
+
+	*base = git__next_line(scan);
+
+	return (assigns->length == 0) ? GIT_ENOTFOUND : 0;
+}
+
+static void git_attr_rule__clear(git_attr_rule *rule)
+{
+	unsigned int i;
+	git_attr_assignment *assign;
+
+	if (!rule)
+		return;
+
+	if (!(rule->match.flags & GIT_ATTR_FNMATCH_IGNORE)) {
+		git_vector_foreach(&rule->assigns, i, assign)
+			GIT_REFCOUNT_DEC(assign, git_attr_assignment__free);
+		git_vector_free(&rule->assigns);
+	}
+
+	/* match.pattern is stored in a git_pool, so no need to free */
+	rule->match.pattern = NULL;
+	rule->match.length = 0;
+}
+
+void git_attr_rule__free(git_attr_rule *rule)
+{
+	git_attr_rule__clear(rule);
+	git__free(rule);
+}
+
+int git_attr_session__init(git_attr_session *session, git_repository *repo)
+{
+	assert(repo);
+
+	memset(session, 0, sizeof(*session));
+	session->key = git_atomic_inc(&repo->attr_session_key);
+
+	return 0;
+}
+
+void git_attr_session__free(git_attr_session *session)
+{
+	if (!session)
+		return;
+
+	git_buf_dispose(&session->sysdir);
+	git_buf_dispose(&session->tmp);
+
+	memset(session, 0, sizeof(git_attr_session));
+}

node_modules/nodegit/vendor/libgit2/src/attr_file.h

@@ -0,0 +1,220 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_attr_file_h__
+#define INCLUDE_attr_file_h__
+
+#include "common.h"
+
+#include "git2/oid.h"
+#include "git2/attr.h"
+#include "vector.h"
+#include "pool.h"
+#include "buffer.h"
+#include "futils.h"
+
+#define GIT_ATTR_FILE			".gitattributes"
+#define GIT_ATTR_FILE_INREPO	"attributes"
+#define GIT_ATTR_FILE_SYSTEM	"gitattributes"
+#define GIT_ATTR_FILE_XDG		"attributes"
+
+#define GIT_ATTR_FNMATCH_NEGATIVE	(1U << 0)
+#define GIT_ATTR_FNMATCH_DIRECTORY	(1U << 1)
+#define GIT_ATTR_FNMATCH_FULLPATH	(1U << 2)
+#define GIT_ATTR_FNMATCH_MACRO		(1U << 3)
+#define GIT_ATTR_FNMATCH_IGNORE		(1U << 4)
+#define GIT_ATTR_FNMATCH_HASWILD	(1U << 5)
+#define GIT_ATTR_FNMATCH_ALLOWSPACE	(1U << 6)
+#define GIT_ATTR_FNMATCH_ICASE		(1U << 7)
+#define GIT_ATTR_FNMATCH_MATCH_ALL	(1U << 8)
+#define GIT_ATTR_FNMATCH_ALLOWNEG   (1U << 9)
+#define GIT_ATTR_FNMATCH_ALLOWMACRO (1U << 10)
+
+#define GIT_ATTR_FNMATCH__INCOMING \
+	(GIT_ATTR_FNMATCH_ALLOWSPACE | GIT_ATTR_FNMATCH_ALLOWNEG | GIT_ATTR_FNMATCH_ALLOWMACRO)
+
+typedef enum {
+	GIT_ATTR_FILE__IN_MEMORY   = 0,
+	GIT_ATTR_FILE__FROM_FILE   = 1,
+	GIT_ATTR_FILE__FROM_INDEX  = 2,
+	GIT_ATTR_FILE__FROM_HEAD   = 3,
+
+	GIT_ATTR_FILE_NUM_SOURCES  = 4
+} git_attr_file_source;
+
+extern const char *git_attr__true;
+extern const char *git_attr__false;
+extern const char *git_attr__unset;
+
+typedef struct {
+	char *pattern;
+	size_t length;
+	char *containing_dir;
+	size_t containing_dir_length;
+	unsigned int flags;
+} git_attr_fnmatch;
+
+typedef struct {
+	git_attr_fnmatch match;
+	git_vector assigns;		/* vector of <git_attr_assignment*> */
+} git_attr_rule;
+
+typedef struct {
+	git_refcount unused;
+	const char *name;
+	uint32_t name_hash;
+} git_attr_name;
+
+typedef struct {
+	git_refcount rc;		/* for macros */
+	char *name;
+	uint32_t name_hash;
+	const char *value;
+} git_attr_assignment;
+
+typedef struct git_attr_file_entry git_attr_file_entry;
+
+typedef struct {
+	git_refcount rc;
+	git_mutex lock;
+	git_attr_file_entry *entry;
+	git_attr_file_source source;
+	git_vector rules;			/* vector of <rule*> or <fnmatch*> */
+	git_pool pool;
+	unsigned int nonexistent:1;
+	int session_key;
+	union {
+		git_oid oid;
+		git_futils_filestamp stamp;
+	} cache_data;
+} git_attr_file;
+
+struct git_attr_file_entry {
+	git_attr_file *file[GIT_ATTR_FILE_NUM_SOURCES];
+	const char *path; /* points into fullpath */
+	char fullpath[GIT_FLEX_ARRAY];
+};
+
+typedef struct {
+	git_buf  full;
+	char    *path;
+	char    *basename;
+	int      is_dir;
+} git_attr_path;
+
+/* A git_attr_session can provide an "instance" of reading, to prevent cache
+ * invalidation during a single operation instance (like checkout).
+ */
+
+typedef struct {
+	int key;
+	unsigned int init_setup:1,
+		init_sysdir:1;
+	git_buf sysdir;
+	git_buf tmp;
+} git_attr_session;
+
+extern int git_attr_session__init(git_attr_session *attr_session, git_repository *repo);
+extern void git_attr_session__free(git_attr_session *session);
+
+extern int git_attr_get_many_with_session(
+	const char **values_out,
+	git_repository *repo,
+	git_attr_session *attr_session,
+	uint32_t flags,
+	const char *path,
+	size_t num_attr,
+	const char **names);
+
+typedef int (*git_attr_file_parser)(
+	git_repository *repo,
+	git_attr_file *file,
+	const char *data,
+	bool allow_macros);
+
+/*
+ * git_attr_file API
+ */
+
+int git_attr_file__new(
+	git_attr_file **out,
+	git_attr_file_entry *entry,
+	git_attr_file_source source);
+
+void git_attr_file__free(git_attr_file *file);
+
+int git_attr_file__load(
+	git_attr_file **out,
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_attr_file_entry *ce,
+	git_attr_file_source source,
+	git_attr_file_parser parser,
+	bool allow_macros);
+
+int git_attr_file__load_standalone(
+	git_attr_file **out, const char *path);
+
+int git_attr_file__out_of_date(
+	git_repository *repo, git_attr_session *session, git_attr_file *file);
+
+int git_attr_file__parse_buffer(
+	git_repository *repo, git_attr_file *attrs, const char *data, bool allow_macros);
+
+int git_attr_file__clear_rules(
+	git_attr_file *file, bool need_lock);
+
+int git_attr_file__lookup_one(
+	git_attr_file *file,
+	git_attr_path *path,
+	const char *attr,
+	const char **value);
+
+/* loop over rules in file from bottom to top */
+#define git_attr_file__foreach_matching_rule(file, path, iter, rule)	\
+	git_vector_rforeach(&(file)->rules, (iter), (rule)) \
+		if (git_attr_rule__match((rule), (path)))
+
+uint32_t git_attr_file__name_hash(const char *name);
+
+
+/*
+ * other utilities
+ */
+
+extern int git_attr_fnmatch__parse(
+	git_attr_fnmatch *spec,
+	git_pool *pool,
+	const char *source,
+	const char **base);
+
+extern bool git_attr_fnmatch__match(
+	git_attr_fnmatch *rule,
+	git_attr_path *path);
+
+extern void git_attr_rule__free(git_attr_rule *rule);
+
+extern bool git_attr_rule__match(
+	git_attr_rule *rule,
+	git_attr_path *path);
+
+extern git_attr_assignment *git_attr_rule__lookup_assignment(
+	git_attr_rule *rule, const char *name);
+
+typedef enum { GIT_DIR_FLAG_TRUE = 1, GIT_DIR_FLAG_FALSE = 0, GIT_DIR_FLAG_UNKNOWN = -1 } git_dir_flag;
+
+extern int git_attr_path__init(
+	git_attr_path *info, const char *path, const char *base, git_dir_flag is_dir);
+
+extern void git_attr_path__free(git_attr_path *info);
+
+extern int git_attr_assignment__parse(
+	git_repository *repo, /* needed to expand macros */
+	git_pool *pool,
+	git_vector *assigns,
+	const char **scan);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/attrcache.c

@@ -0,0 +1,467 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "attrcache.h"
+
+#include "repository.h"
+#include "attr_file.h"
+#include "config.h"
+#include "sysdir.h"
+#include "ignore.h"
+
+GIT_INLINE(int) attr_cache_lock(git_attr_cache *cache)
+{
+	GIT_UNUSED(cache); /* avoid warning if threading is off */
+
+	if (git_mutex_lock(&cache->lock) < 0) {
+		git_error_set(GIT_ERROR_OS, "unable to get attr cache lock");
+		return -1;
+	}
+	return 0;
+}
+
+GIT_INLINE(void) attr_cache_unlock(git_attr_cache *cache)
+{
+	GIT_UNUSED(cache); /* avoid warning if threading is off */
+	git_mutex_unlock(&cache->lock);
+}
+
+GIT_INLINE(git_attr_file_entry *) attr_cache_lookup_entry(
+	git_attr_cache *cache, const char *path)
+{
+	return git_strmap_get(cache->files, path);
+}
+
+int git_attr_cache__alloc_file_entry(
+	git_attr_file_entry **out,
+	const char *base,
+	const char *path,
+	git_pool *pool)
+{
+	size_t baselen = 0, pathlen = strlen(path);
+	size_t cachesize = sizeof(git_attr_file_entry) + pathlen + 1;
+	git_attr_file_entry *ce;
+
+	if (base != NULL && git_path_root(path) < 0) {
+		baselen = strlen(base);
+		cachesize += baselen;
+
+		if (baselen && base[baselen - 1] != '/')
+			cachesize++;
+	}
+
+	ce = git_pool_mallocz(pool, cachesize);
+	GIT_ERROR_CHECK_ALLOC(ce);
+
+	if (baselen) {
+		memcpy(ce->fullpath, base, baselen);
+
+		if (base[baselen - 1] != '/')
+			ce->fullpath[baselen++] = '/';
+	}
+	memcpy(&ce->fullpath[baselen], path, pathlen);
+
+	ce->path = &ce->fullpath[baselen];
+	*out = ce;
+
+	return 0;
+}
+
+/* call with attrcache locked */
+static int attr_cache_make_entry(
+	git_attr_file_entry **out, git_repository *repo, const char *path)
+{
+	git_attr_cache *cache = git_repository_attr_cache(repo);
+	git_attr_file_entry *entry = NULL;
+	int error;
+
+	if ((error = git_attr_cache__alloc_file_entry(&entry, git_repository_workdir(repo),
+						      path, &cache->pool)) < 0)
+		return error;
+
+	if ((error = git_strmap_set(cache->files, entry->path, entry)) < 0)
+		return error;
+
+	*out = entry;
+	return error;
+}
+
+/* insert entry or replace existing if we raced with another thread */
+static int attr_cache_upsert(git_attr_cache *cache, git_attr_file *file)
+{
+	git_attr_file_entry *entry;
+	git_attr_file *old;
+
+	if (attr_cache_lock(cache) < 0)
+		return -1;
+
+	entry = attr_cache_lookup_entry(cache, file->entry->path);
+
+	GIT_REFCOUNT_OWN(file, entry);
+	GIT_REFCOUNT_INC(file);
+
+	/*
+	 * Replace the existing value if another thread has
+	 * created it in the meantime.
+	 */
+	old = git__swap(entry->file[file->source], file);
+
+	if (old) {
+		GIT_REFCOUNT_OWN(old, NULL);
+		git_attr_file__free(old);
+	}
+
+	attr_cache_unlock(cache);
+	return 0;
+}
+
+static int attr_cache_remove(git_attr_cache *cache, git_attr_file *file)
+{
+	int error = 0;
+	git_attr_file_entry *entry;
+	git_attr_file *old = NULL;
+
+	if (!file)
+		return 0;
+
+	if ((error = attr_cache_lock(cache)) < 0)
+		return error;
+
+	if ((entry = attr_cache_lookup_entry(cache, file->entry->path)) != NULL)
+		old = git__compare_and_swap(&entry->file[file->source], file, NULL);
+
+	attr_cache_unlock(cache);
+
+	if (old) {
+		GIT_REFCOUNT_OWN(old, NULL);
+		git_attr_file__free(old);
+	}
+
+	return error;
+}
+
+/* Look up cache entry and file.
+ * - If entry is not present, create it while the cache is locked.
+ * - If file is present, increment refcount before returning it, so the
+ *   cache can be unlocked and it won't go away.
+ */
+static int attr_cache_lookup(
+	git_attr_file **out_file,
+	git_attr_file_entry **out_entry,
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_attr_file_source source,
+	const char *base,
+	const char *filename)
+{
+	int error = 0;
+	git_buf path = GIT_BUF_INIT;
+	const char *wd = git_repository_workdir(repo), *relfile;
+	git_attr_cache *cache = git_repository_attr_cache(repo);
+	git_attr_file_entry *entry = NULL;
+	git_attr_file *file = NULL;
+
+	/* join base and path as needed */
+	if (base != NULL && git_path_root(filename) < 0) {
+		git_buf *p = attr_session ? &attr_session->tmp : &path;
+
+		if (git_buf_joinpath(p, base, filename) < 0)
+			return -1;
+
+		filename = p->ptr;
+	}
+
+	relfile = filename;
+	if (wd && !git__prefixcmp(relfile, wd))
+		relfile += strlen(wd);
+
+	/* check cache for existing entry */
+	if ((error = attr_cache_lock(cache)) < 0)
+		goto cleanup;
+
+	entry = attr_cache_lookup_entry(cache, relfile);
+	if (!entry)
+		error = attr_cache_make_entry(&entry, repo, relfile);
+	else if (entry->file[source] != NULL) {
+		file = entry->file[source];
+		GIT_REFCOUNT_INC(file);
+	}
+
+	attr_cache_unlock(cache);
+
+cleanup:
+	*out_file  = file;
+	*out_entry = entry;
+
+	git_buf_dispose(&path);
+	return error;
+}
+
+int git_attr_cache__get(
+	git_attr_file **out,
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_attr_file_source source,
+	const char *base,
+	const char *filename,
+	git_attr_file_parser parser,
+	bool allow_macros)
+{
+	int error = 0;
+	git_attr_cache *cache = git_repository_attr_cache(repo);
+	git_attr_file_entry *entry = NULL;
+	git_attr_file *file = NULL, *updated = NULL;
+
+	if ((error = attr_cache_lookup(
+			&file, &entry, repo, attr_session, source, base, filename)) < 0)
+		return error;
+
+	/* load file if we don't have one or if existing one is out of date */
+	if (!file || (error = git_attr_file__out_of_date(repo, attr_session, file)) > 0)
+		error = git_attr_file__load(&updated, repo, attr_session, entry, source, parser, allow_macros);
+
+	/* if we loaded the file, insert into and/or update cache */
+	if (updated) {
+		if ((error = attr_cache_upsert(cache, updated)) < 0)
+			git_attr_file__free(updated);
+		else {
+			git_attr_file__free(file); /* offset incref from lookup */
+			file = updated;
+		}
+	}
+
+	/* if file could not be loaded */
+	if (error < 0) {
+		/* remove existing entry */
+		if (file) {
+			attr_cache_remove(cache, file);
+			git_attr_file__free(file); /* offset incref from lookup */
+			file = NULL;
+		}
+		/* no error if file simply doesn't exist */
+		if (error == GIT_ENOTFOUND) {
+			git_error_clear();
+			error = 0;
+		}
+	}
+
+	*out = file;
+	return error;
+}
+
+bool git_attr_cache__is_cached(
+	git_repository *repo,
+	git_attr_file_source source,
+	const char *filename)
+{
+	git_attr_cache *cache = git_repository_attr_cache(repo);
+	git_attr_file_entry *entry;
+	git_strmap *files;
+
+	if (!cache || !(files = cache->files))
+		return false;
+
+	if ((entry = git_strmap_get(files, filename)) == NULL)
+		return false;
+
+	return entry && (entry->file[source] != NULL);
+}
+
+
+static int attr_cache__lookup_path(
+	char **out, git_config *cfg, const char *key, const char *fallback)
+{
+	git_buf buf = GIT_BUF_INIT;
+	int error;
+	git_config_entry *entry = NULL;
+
+	*out = NULL;
+
+	if ((error = git_config__lookup_entry(&entry, cfg, key, false)) < 0)
+		return error;
+
+	if (entry) {
+		const char *cfgval = entry->value;
+
+		/* expand leading ~/ as needed */
+		if (cfgval && cfgval[0] == '~' && cfgval[1] == '/') {
+			if (! (error = git_sysdir_expand_global_file(&buf, &cfgval[2])))
+				*out = git_buf_detach(&buf);
+		} else if (cfgval) {
+			*out = git__strdup(cfgval);
+		}
+	}
+	else if (!git_sysdir_find_xdg_file(&buf, fallback)) {
+		*out = git_buf_detach(&buf);
+	}
+
+	git_config_entry_free(entry);
+	git_buf_dispose(&buf);
+
+	return error;
+}
+
+static void attr_cache__free(git_attr_cache *cache)
+{
+	bool unlock;
+
+	if (!cache)
+		return;
+
+	unlock = (attr_cache_lock(cache) == 0);
+
+	if (cache->files != NULL) {
+		git_attr_file_entry *entry;
+		git_attr_file *file;
+		int i;
+
+		git_strmap_foreach_value(cache->files, entry, {
+			for (i = 0; i < GIT_ATTR_FILE_NUM_SOURCES; ++i) {
+				if ((file = git__swap(entry->file[i], NULL)) != NULL) {
+					GIT_REFCOUNT_OWN(file, NULL);
+					git_attr_file__free(file);
+				}
+			}
+		});
+		git_strmap_free(cache->files);
+	}
+
+	if (cache->macros != NULL) {
+		git_attr_rule *rule;
+
+		git_strmap_foreach_value(cache->macros, rule, {
+			git_attr_rule__free(rule);
+		});
+		git_strmap_free(cache->macros);
+	}
+
+	git_pool_clear(&cache->pool);
+
+	git__free(cache->cfg_attr_file);
+	cache->cfg_attr_file = NULL;
+
+	git__free(cache->cfg_excl_file);
+	cache->cfg_excl_file = NULL;
+
+	if (unlock)
+		attr_cache_unlock(cache);
+	git_mutex_free(&cache->lock);
+
+	git__free(cache);
+}
+
+int git_attr_cache__init(git_repository *repo)
+{
+	int ret = 0;
+	git_attr_cache *cache = git_repository_attr_cache(repo);
+	git_config *cfg = NULL;
+
+	if (cache)
+		return 0;
+
+	cache = git__calloc(1, sizeof(git_attr_cache));
+	GIT_ERROR_CHECK_ALLOC(cache);
+
+	/* set up lock */
+	if (git_mutex_init(&cache->lock) < 0) {
+		git_error_set(GIT_ERROR_OS, "unable to initialize lock for attr cache");
+		git__free(cache);
+		return -1;
+	}
+
+	if ((ret = git_repository_config_snapshot(&cfg, repo)) < 0)
+		goto cancel;
+
+	/* cache config settings for attributes and ignores */
+	ret = attr_cache__lookup_path(
+		&cache->cfg_attr_file, cfg, GIT_ATTR_CONFIG, GIT_ATTR_FILE_XDG);
+	if (ret < 0)
+		goto cancel;
+
+	ret = attr_cache__lookup_path(
+		&cache->cfg_excl_file, cfg, GIT_IGNORE_CONFIG, GIT_IGNORE_FILE_XDG);
+	if (ret < 0)
+		goto cancel;
+
+	/* allocate hashtable for attribute and ignore file contents,
+	 * hashtable for attribute macros, and string pool
+	 */
+	if ((ret = git_strmap_new(&cache->files)) < 0 ||
+	    (ret = git_strmap_new(&cache->macros)) < 0)
+		goto cancel;
+
+	git_pool_init(&cache->pool, 1);
+
+	cache = git__compare_and_swap(&repo->attrcache, NULL, cache);
+	if (cache)
+		goto cancel; /* raced with another thread, free this but no error */
+
+	git_config_free(cfg);
+
+	/* insert default macros */
+	return git_attr_add_macro(repo, "binary", "-diff -merge -text -crlf");
+
+cancel:
+	attr_cache__free(cache);
+	git_config_free(cfg);
+	return ret;
+}
+
+void git_attr_cache_flush(git_repository *repo)
+{
+	git_attr_cache *cache;
+
+	/* this could be done less expensively, but for now, we'll just free
+	 * the entire attrcache and let the next use reinitialize it...
+	 */
+	if (repo && (cache = git__swap(repo->attrcache, NULL)) != NULL)
+		attr_cache__free(cache);
+}
+
+int git_attr_cache__insert_macro(git_repository *repo, git_attr_rule *macro)
+{
+	git_attr_cache *cache = git_repository_attr_cache(repo);
+	git_attr_rule *preexisting;
+	bool locked = false;
+	int error = 0;
+
+	/*
+	 * Callers assume that if we return success, that the
+	 * macro will have been adopted by the attributes cache.
+	 * Thus, we have to free the macro here if it's not being
+	 * added to the cache.
+	 *
+	 * TODO: generate warning log if (macro->assigns.length == 0)
+	 */
+	if (macro->assigns.length == 0) {
+		git_attr_rule__free(macro);
+		goto out;
+	}
+
+	if ((error = attr_cache_lock(cache)) < 0)
+		goto out;
+	locked = true;
+
+	if ((preexisting = git_strmap_get(cache->macros, macro->match.pattern)) != NULL)
+	    git_attr_rule__free(preexisting);
+
+	if ((error = git_strmap_set(cache->macros, macro->match.pattern, macro)) < 0)
+	    goto out;
+
+out:
+	if (locked)
+		attr_cache_unlock(cache);
+	return error;
+}
+
+git_attr_rule *git_attr_cache__lookup_macro(
+	git_repository *repo, const char *name)
+{
+	git_strmap *macros = git_repository_attr_cache(repo)->macros;
+
+	return git_strmap_get(macros, name);
+}

node_modules/nodegit/vendor/libgit2/src/attrcache.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_attrcache_h__
+#define INCLUDE_attrcache_h__
+
+#include "common.h"
+
+#include "attr_file.h"
+#include "strmap.h"
+
+#define GIT_ATTR_CONFIG       "core.attributesfile"
+#define GIT_IGNORE_CONFIG     "core.excludesfile"
+
+typedef struct {
+	char *cfg_attr_file; /* cached value of core.attributesfile */
+	char *cfg_excl_file; /* cached value of core.excludesfile */
+	git_strmap *files;	 /* hash path to git_attr_cache_entry records */
+	git_strmap *macros;	 /* hash name to vector<git_attr_assignment> */
+	git_mutex lock;
+	git_pool  pool;
+} git_attr_cache;
+
+extern int git_attr_cache__init(git_repository *repo);
+
+/* get file - loading and reload as needed */
+extern int git_attr_cache__get(
+	git_attr_file **file,
+	git_repository *repo,
+	git_attr_session *attr_session,
+	git_attr_file_source source,
+	const char *base,
+	const char *filename,
+	git_attr_file_parser parser,
+	bool allow_macros);
+
+extern bool git_attr_cache__is_cached(
+	git_repository *repo,
+	git_attr_file_source source,
+	const char *path);
+
+extern int git_attr_cache__alloc_file_entry(
+	git_attr_file_entry **out,
+	const char *base,
+	const char *path,
+	git_pool *pool);
+
+extern int git_attr_cache__insert_macro(
+	git_repository *repo, git_attr_rule *macro);
+
+extern git_attr_rule *git_attr_cache__lookup_macro(
+	git_repository *repo, const char *name);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/bitvec.h

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_bitvec_h__
+#define INCLUDE_bitvec_h__
+
+#include "common.h"
+
+/*
+ * This is a silly little fixed length bit vector type that will store
+ * vectors of 64 bits or less directly in the structure and allocate
+ * memory for vectors longer than 64 bits.  You can use the two versions
+ * transparently through the API and avoid heap allocation completely when
+ * using a short bit vector as a result.
+ */
+typedef struct {
+	size_t length;
+	union {
+		uint64_t *words;
+		uint64_t bits;
+	} u;
+} git_bitvec;
+
+GIT_INLINE(int) git_bitvec_init(git_bitvec *bv, size_t capacity)
+{
+	memset(bv, 0x0, sizeof(*bv));
+
+	if (capacity >= 64) {
+		bv->length = (capacity / 64) + 1;
+		bv->u.words = git__calloc(bv->length, sizeof(uint64_t));
+		if (!bv->u.words)
+			return -1;
+	}
+
+	return 0;
+}
+
+#define GIT_BITVEC_MASK(BIT) ((uint64_t)1 << (BIT % 64))
+#define GIT_BITVEC_WORD(BV, BIT) (BV->length ? &BV->u.words[BIT / 64] : &BV->u.bits)
+
+GIT_INLINE(void) git_bitvec_set(git_bitvec *bv, size_t bit, bool on)
+{
+	uint64_t *word = GIT_BITVEC_WORD(bv, bit);
+	uint64_t mask = GIT_BITVEC_MASK(bit);
+
+	if (on)
+		*word |= mask;
+	else
+		*word &= ~mask;
+}
+
+GIT_INLINE(bool) git_bitvec_get(git_bitvec *bv, size_t bit)
+{
+	uint64_t *word = GIT_BITVEC_WORD(bv, bit);
+	return (*word & GIT_BITVEC_MASK(bit)) != 0;
+}
+
+GIT_INLINE(void) git_bitvec_clear(git_bitvec *bv)
+{
+	if (!bv->length)
+		bv->u.bits = 0;
+	else
+		memset(bv->u.words, 0x0, bv->length * sizeof(uint64_t));
+}
+
+GIT_INLINE(void) git_bitvec_free(git_bitvec *bv)
+{
+	if (bv->length)
+		git__free(bv->u.words);
+}
+
+#endif

node_modules/nodegit/vendor/libgit2/src/blame.c

@@ -0,0 +1,544 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "blame.h"
+
+#include "git2/commit.h"
+#include "git2/revparse.h"
+#include "git2/revwalk.h"
+#include "git2/tree.h"
+#include "git2/diff.h"
+#include "git2/blob.h"
+#include "git2/signature.h"
+#include "git2/mailmap.h"
+#include "util.h"
+#include "repository.h"
+#include "blame_git.h"
+
+
+static int hunk_byfinalline_search_cmp(const void *key, const void *entry)
+{
+	git_blame_hunk *hunk = (git_blame_hunk*)entry;
+
+	size_t lineno = *(size_t*)key;
+	size_t lines_in_hunk = hunk->lines_in_hunk;
+	size_t final_start_line_number = hunk->final_start_line_number;
+
+	if (lineno < final_start_line_number)
+		return -1;
+	if (lineno >= final_start_line_number + lines_in_hunk)
+		return 1;
+	return 0;
+}
+
+static int paths_cmp(const void *a, const void *b) { return git__strcmp((char*)a, (char*)b); }
+static int hunk_cmp(const void *_a, const void *_b)
+{
+	git_blame_hunk *a = (git_blame_hunk*)_a,
+						*b = (git_blame_hunk*)_b;
+
+	if (a->final_start_line_number > b->final_start_line_number)
+		return 1;
+	else if (a->final_start_line_number < b->final_start_line_number)
+		return -1;
+	else
+		return 0;
+}
+
+static bool hunk_ends_at_or_before_line(git_blame_hunk *hunk, size_t line)
+{
+	return line >= (hunk->final_start_line_number + hunk->lines_in_hunk - 1);
+}
+
+static bool hunk_starts_at_or_after_line(git_blame_hunk *hunk, size_t line)
+{
+	return line <= hunk->final_start_line_number;
+}
+
+static git_blame_hunk* new_hunk(
+		size_t start,
+		size_t lines,
+		size_t orig_start,
+		const char *path)
+{
+	git_blame_hunk *hunk = git__calloc(1, sizeof(git_blame_hunk));
+	if (!hunk) return NULL;
+
+	hunk->lines_in_hunk = lines;
+	hunk->final_start_line_number = start;
+	hunk->orig_start_line_number = orig_start;
+	hunk->orig_path = path ? git__strdup(path) : NULL;
+
+	return hunk;
+}
+
+static git_blame_hunk* dup_hunk(git_blame_hunk *hunk)
+{
+	git_blame_hunk *newhunk = new_hunk(
+			hunk->final_start_line_number,
+			hunk->lines_in_hunk,
+			hunk->orig_start_line_number,
+			hunk->orig_path);
+
+	if (!newhunk)
+		return NULL;
+
+	git_oid_cpy(&newhunk->orig_commit_id, &hunk->orig_commit_id);
+	git_oid_cpy(&newhunk->final_commit_id, &hunk->final_commit_id);
+	newhunk->boundary = hunk->boundary;
+	git_signature_dup(&newhunk->final_signature, hunk->final_signature);
+	git_signature_dup(&newhunk->orig_signature, hunk->orig_signature);
+	return newhunk;
+}
+
+static void free_hunk(git_blame_hunk *hunk)
+{
+	git__free((void*)hunk->orig_path);
+	git_signature_free(hunk->final_signature);
+	git_signature_free(hunk->orig_signature);
+	git__free(hunk);
+}
+
+/* Starting with the hunk that includes start_line, shift all following hunks'
+ * final_start_line by shift_by lines */
+static void shift_hunks_by(git_vector *v, size_t start_line, int shift_by)
+{
+	size_t i;
+
+	if (!git_vector_bsearch2(&i, v, hunk_byfinalline_search_cmp, &start_line)) {
+		for (; i < v->length; i++) {
+			git_blame_hunk *hunk = (git_blame_hunk*)v->contents[i];
+			hunk->final_start_line_number += shift_by;
+		}
+	}
+}
+
+git_blame* git_blame__alloc(
+	git_repository *repo,
+	git_blame_options opts,
+	const char *path)
+{
+	git_blame *gbr = git__calloc(1, sizeof(git_blame));
+	if (!gbr)
+		return NULL;
+
+	gbr->repository = repo;
+	gbr->options = opts;
+
+	if (git_vector_init(&gbr->hunks, 8, hunk_cmp) < 0 ||
+		git_vector_init(&gbr->paths, 8, paths_cmp) < 0 ||
+		(gbr->path = git__strdup(path)) == NULL ||
+		git_vector_insert(&gbr->paths, git__strdup(path)) < 0)
+	{
+		git_blame_free(gbr);
+		return NULL;
+	}
+
+	if (opts.flags & GIT_BLAME_USE_MAILMAP &&
+	    git_mailmap_from_repository(&gbr->mailmap, repo) < 0) {
+		git_blame_free(gbr);
+		return NULL;
+	}
+
+	return gbr;
+}
+
+void git_blame_free(git_blame *blame)
+{
+	size_t i;
+	git_blame_hunk *hunk;
+
+	if (!blame) return;
+
+	git_vector_foreach(&blame->hunks, i, hunk)
+		free_hunk(hunk);
+	git_vector_free(&blame->hunks);
+
+	git_vector_free_deep(&blame->paths);
+
+	git_array_clear(blame->line_index);
+
+	git_mailmap_free(blame->mailmap);
+
+	git__free(blame->path);
+	git_blob_free(blame->final_blob);
+	git__free(blame);
+}
+
+uint32_t git_blame_get_hunk_count(git_blame *blame)
+{
+	assert(blame);
+	return (uint32_t)blame->hunks.length;
+}
+
+const git_blame_hunk *git_blame_get_hunk_byindex(git_blame *blame, uint32_t index)
+{
+	assert(blame);
+	return (git_blame_hunk*)git_vector_get(&blame->hunks, index);
+}
+
+const git_blame_hunk *git_blame_get_hunk_byline(git_blame *blame, size_t lineno)
+{
+	size_t i, new_lineno = lineno;
+	assert(blame);
+
+	if (!git_vector_bsearch2(&i, &blame->hunks, hunk_byfinalline_search_cmp, &new_lineno)) {
+		return git_blame_get_hunk_byindex(blame, (uint32_t)i);
+	}
+
+	return NULL;
+}
+
+static int normalize_options(
+		git_blame_options *out,
+		const git_blame_options *in,
+		git_repository *repo)
+{
+	git_blame_options dummy = GIT_BLAME_OPTIONS_INIT;
+	if (!in) in = &dummy;
+
+	memcpy(out, in, sizeof(git_blame_options));
+
+	/* No newest_commit => HEAD */
+	if (git_oid_is_zero(&out->newest_commit)) {
+		if (git_reference_name_to_id(&out->newest_commit, repo, "HEAD") < 0) {
+			return -1;
+		}
+	}
+
+	/* min_line 0 really means 1 */
+	if (!out->min_line) out->min_line = 1;
+	/* max_line 0 really means N, but we don't know N yet */
+
+	/* Fix up option implications */
+	if (out->flags & GIT_BLAME_TRACK_COPIES_ANY_COMMIT_COPIES)
+		out->flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES;
+	if (out->flags & GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES)
+		out->flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES;
+	if (out->flags & GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES)
+		out->flags |= GIT_BLAME_TRACK_COPIES_SAME_FILE;
+
+	return 0;
+}
+
+static git_blame_hunk *split_hunk_in_vector(
+		git_vector *vec,
+		git_blame_hunk *hunk,
+		size_t rel_line,
+		bool return_new)
+{
+	size_t new_line_count;
+	git_blame_hunk *nh;
+
+	/* Don't split if already at a boundary */
+	if (rel_line <= 0 ||
+	    rel_line >= hunk->lines_in_hunk)
+	{
+		return hunk;
+	}
+
+	new_line_count = hunk->lines_in_hunk - rel_line;
+	nh = new_hunk(hunk->final_start_line_number + rel_line, new_line_count,
+			hunk->orig_start_line_number + rel_line, hunk->orig_path);
+
+	if (!nh)
+		return NULL;
+
+	git_oid_cpy(&nh->final_commit_id, &hunk->final_commit_id);
+	git_oid_cpy(&nh->orig_commit_id, &hunk->orig_commit_id);
+
+	/* Adjust hunk that was split */
+	hunk->lines_in_hunk -= new_line_count;
+	git_vector_insert_sorted(vec, nh, NULL);
+	{
+		git_blame_hunk *ret = return_new ? nh : hunk;
+		return ret;
+	}
+}
+
+/*
+ * Construct a list of char indices for where lines begin
+ * Adapted from core git:
+ * https://github.com/gitster/git/blob/be5c9fb9049ed470e7005f159bb923a5f4de1309/builtin/blame.c#L1760-L1789
+ */
+static int index_blob_lines(git_blame *blame)
+{
+    const char *buf = blame->final_buf;
+    size_t len = blame->final_buf_size;
+    int num = 0, incomplete = 0, bol = 1;
+    size_t *i;
+
+    if (len && buf[len-1] != '\n')
+        incomplete++; /* incomplete line at the end */
+    while (len--) {
+        if (bol) {
+            i = git_array_alloc(blame->line_index);
+            GIT_ERROR_CHECK_ALLOC(i);
+            *i = buf - blame->final_buf;
+            bol = 0;
+        }
+        if (*buf++ == '\n') {
+            num++;
+            bol = 1;
+        }
+    }
+    i = git_array_alloc(blame->line_index);
+    GIT_ERROR_CHECK_ALLOC(i);
+    *i = buf - blame->final_buf;
+    blame->num_lines = num + incomplete;
+    return blame->num_lines;
+}
+
+static git_blame_hunk* hunk_from_entry(git_blame__entry *e, git_blame *blame)
+{
+	git_blame_hunk *h = new_hunk(
+			e->lno+1, e->num_lines, e->s_lno+1, e->suspect->path);
+
+	if (!h)
+		return NULL;
+
+	git_oid_cpy(&h->final_commit_id, git_commit_id(e->suspect->commit));
+	git_oid_cpy(&h->orig_commit_id, git_commit_id(e->suspect->commit));
+	git_commit_author_with_mailmap(
+		&h->final_signature, e->suspect->commit, blame->mailmap);
+	git_signature_dup(&h->orig_signature, h->final_signature);
+	h->boundary = e->is_boundary ? 1 : 0;
+	return h;
+}
+
+static int load_blob(git_blame *blame)
+{
+	int error;
+
+	if (blame->final_blob) return 0;
+
+	error = git_commit_lookup(&blame->final, blame->repository, &blame->options.newest_commit);
+	if (error < 0)
+		goto cleanup;
+	error = git_object_lookup_bypath((git_object**)&blame->final_blob,
+			(git_object*)blame->final, blame->path, GIT_OBJECT_BLOB);
+
+cleanup:
+	return error;
+}
+
+static int blame_internal(git_blame *blame)
+{
+	int error;
+	git_blame__entry *ent = NULL;
+	git_blame__origin *o;
+
+	if ((error = load_blob(blame)) < 0 ||
+	    (error = git_blame__get_origin(&o, blame, blame->final, blame->path)) < 0)
+		goto cleanup;
+
+	if (git_blob_rawsize(blame->final_blob) > SIZE_MAX) {
+		git_error_set(GIT_ERROR_NOMEMORY, "blob is too large to blame");
+		error = -1;
+		goto cleanup;
+	}
+
+	blame->final_buf = git_blob_rawcontent(blame->final_blob);
+	blame->final_buf_size = (size_t)git_blob_rawsize(blame->final_blob);
+
+	ent = git__calloc(1, sizeof(git_blame__entry));
+	GIT_ERROR_CHECK_ALLOC(ent);
+
+	ent->num_lines = index_blob_lines(blame);
+	ent->lno = blame->options.min_line - 1;
+	ent->num_lines = ent->num_lines - blame->options.min_line + 1;
+	if (blame->options.max_line > 0)
+		ent->num_lines = blame->options.max_line - blame->options.min_line + 1;
+	ent->s_lno = ent->lno;
+	ent->suspect = o;
+
+	blame->ent = ent;
+
+	error = git_blame__like_git(blame, blame->options.flags);
+
+cleanup:
+	for (ent = blame->ent; ent; ) {
+		git_blame__entry *e = ent->next;
+		git_blame_hunk *h = hunk_from_entry(ent, blame);
+
+		git_vector_insert(&blame->hunks, h);
+
+		git_blame__free_entry(ent);
+		ent = e;
+	}
+
+	return error;
+}
+
+/*******************************************************************************
+ * File blaming
+ ******************************************************************************/
+
+int git_blame_file(
+		git_blame **out,
+		git_repository *repo,
+		const char *path,
+		git_blame_options *options)
+{
+	int error = -1;
+	git_blame_options normOptions = GIT_BLAME_OPTIONS_INIT;
+	git_blame *blame = NULL;
+
+	assert(out && repo && path);
+	if ((error = normalize_options(&normOptions, options, repo)) < 0)
+		goto on_error;
+
+	blame = git_blame__alloc(repo, normOptions, path);
+	GIT_ERROR_CHECK_ALLOC(blame);
+
+	if ((error = load_blob(blame)) < 0)
+		goto on_error;
+
+	if ((error = blame_internal(blame)) < 0)
+		goto on_error;
+
+	*out = blame;
+	return 0;
+
+on_error:
+	git_blame_free(blame);
+	return error;
+}
+
+/*******************************************************************************
+ * Buffer blaming
+ *******************************************************************************/
+
+static bool hunk_is_bufferblame(git_blame_hunk *hunk)
+{
+	return git_oid_is_zero(&hunk->final_commit_id);
+}
+
+static int buffer_hunk_cb(
+	const git_diff_delta *delta,
+	const git_diff_hunk *hunk,
+	void *payload)
+{
+	git_blame *blame = (git_blame*)payload;
+	uint32_t wedge_line;
+
+	GIT_UNUSED(delta);
+
+	wedge_line = (hunk->old_lines == 0) ? hunk->new_start : hunk->old_start;
+	blame->current_diff_line = wedge_line;
+
+	blame->current_hunk = (git_blame_hunk*)git_blame_get_hunk_byline(blame, wedge_line);
+	if (!blame->current_hunk) {
+		/* Line added at the end of the file */
+		blame->current_hunk = new_hunk(wedge_line, 0, wedge_line, blame->path);
+		GIT_ERROR_CHECK_ALLOC(blame->current_hunk);
+
+		git_vector_insert(&blame->hunks, blame->current_hunk);
+	} else if (!hunk_starts_at_or_after_line(blame->current_hunk, wedge_line)){
+		/* If this hunk doesn't start between existing hunks, split a hunk up so it does */
+		blame->current_hunk = split_hunk_in_vector(&blame->hunks, blame->current_hunk,
+				wedge_line - blame->current_hunk->orig_start_line_number, true);
+		GIT_ERROR_CHECK_ALLOC(blame->current_hunk);
+	}
+
+	return 0;
+}
+
+static int ptrs_equal_cmp(const void *a, const void *b) { return a<b ? -1 : a>b ? 1 : 0; }
+static int buffer_line_cb(
+	const git_diff_delta *delta,
+	const git_diff_hunk *hunk,
+	const git_diff_line *line,
+	void *payload)
+{
+	git_blame *blame = (git_blame*)payload;
+
+	GIT_UNUSED(delta);
+	GIT_UNUSED(hunk);
+	GIT_UNUSED(line);
+
+	if (line->origin == GIT_DIFF_LINE_ADDITION) {
+		if (hunk_is_bufferblame(blame->current_hunk) &&
+		    hunk_ends_at_or_before_line(blame->current_hunk, blame->current_diff_line)) {
+			/* Append to the current buffer-blame hunk */
+			blame->current_hunk->lines_in_hunk++;
+			shift_hunks_by(&blame->hunks, blame->current_diff_line+1, 1);
+		} else {
+			/* Create a new buffer-blame hunk with this line */
+			shift_hunks_by(&blame->hunks, blame->current_diff_line, 1);
+			blame->current_hunk = new_hunk(blame->current_diff_line, 1, 0, blame->path);
+			GIT_ERROR_CHECK_ALLOC(blame->current_hunk);
+
+			git_vector_insert_sorted(&blame->hunks, blame->current_hunk, NULL);
+		}
+		blame->current_diff_line++;
+	}
+
+	if (line->origin == GIT_DIFF_LINE_DELETION) {
+		/* Trim the line from the current hunk; remove it if it's now empty */
+		size_t shift_base = blame->current_diff_line + blame->current_hunk->lines_in_hunk+1;
+
+		if (--(blame->current_hunk->lines_in_hunk) == 0) {
+			size_t i;
+			shift_base--;
+			if (!git_vector_search2(&i, &blame->hunks, ptrs_equal_cmp, blame->current_hunk)) {
+				git_vector_remove(&blame->hunks, i);
+				free_hunk(blame->current_hunk);
+				blame->current_hunk = (git_blame_hunk*)git_blame_get_hunk_byindex(blame, (uint32_t)i);
+			}
+		}
+		shift_hunks_by(&blame->hunks, shift_base, -1);
+	}
+	return 0;
+}
+
+int git_blame_buffer(
+		git_blame **out,
+		git_blame *reference,
+		const char *buffer,
+		size_t buffer_len)
+{
+	git_blame *blame;
+	git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
+	size_t i;
+	git_blame_hunk *hunk;
+
+	diffopts.context_lines = 0;
+
+	assert(out && reference && buffer && buffer_len);
+
+	blame = git_blame__alloc(reference->repository, reference->options, reference->path);
+	GIT_ERROR_CHECK_ALLOC(blame);
+
+	/* Duplicate all of the hunk structures in the reference blame */
+	git_vector_foreach(&reference->hunks, i, hunk) {
+		git_blame_hunk *h = dup_hunk(hunk);
+		GIT_ERROR_CHECK_ALLOC(h);
+
+		git_vector_insert(&blame->hunks, h);
+	}
+
+	/* Diff to the reference blob */
+	git_diff_blob_to_buffer(reference->final_blob, blame->path,
+		buffer, buffer_len, blame->path, &diffopts,
+		NULL, NULL, buffer_hunk_cb, buffer_line_cb, blame);
+
+	*out = blame;
+	return 0;
+}
+
+int git_blame_options_init(git_blame_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_blame_options, GIT_BLAME_OPTIONS_INIT);
+	return 0;
+}
+
+int git_blame_init_options(git_blame_options *opts, unsigned int version)
+{
+	return git_blame_options_init(opts, version);
+}

node_modules/nodegit/vendor/libgit2/src/blame.h

@@ -0,0 +1,95 @@
+#ifndef INCLUDE_blame_h__
+#define INCLUDE_blame_h__
+
+#include "common.h"
+
+#include "git2/blame.h"
+#include "vector.h"
+#include "diff.h"
+#include "array.h"
+#include "git2/oid.h"
+
+/*
+ * One blob in a commit that is being suspected
+ */
+typedef struct git_blame__origin {
+	int refcnt;
+	struct git_blame__origin *previous;
+	git_commit *commit;
+	git_blob *blob;
+	char path[GIT_FLEX_ARRAY];
+} git_blame__origin;
+
+/*
+ * Each group of lines is described by a git_blame__entry; it can be split
+ * as we pass blame to the parents.  They form a linked list in the
+ * scoreboard structure, sorted by the target line number.
+ */
+typedef struct git_blame__entry {
+	struct git_blame__entry *prev;
+	struct git_blame__entry *next;
+
+	/* the first line of this group in the final image;
+	 * internally all line numbers are 0 based.
+	 */
+	size_t lno;
+
+	/* how many lines this group has */
+	size_t num_lines;
+
+	/* the commit that introduced this group into the final image */
+	git_blame__origin *suspect;
+
+	/* true if the suspect is truly guilty; false while we have not
+	 * checked if the group came from one of its parents.
+	 */
+	bool guilty;
+
+	/* true if the entry has been scanned for copies in the current parent
+	 */
+	bool scanned;
+
+	/* the line number of the first line of this group in the
+	 * suspect's file; internally all line numbers are 0 based.
+	 */
+	size_t s_lno;
+
+	/* how significant this entry is -- cached to avoid
+	 * scanning the lines over and over.
+	 */
+	unsigned score;
+
+	/* Whether this entry has been tracked to a boundary commit.
+	 */
+	bool is_boundary;
+} git_blame__entry;
+
+struct git_blame {
+	char *path;
+	git_repository *repository;
+	git_mailmap *mailmap;
+	git_blame_options options;
+
+	git_vector hunks;
+	git_vector paths;
+
+	git_blob *final_blob;
+	git_array_t(size_t) line_index;
+
+	size_t current_diff_line;
+	git_blame_hunk *current_hunk;
+
+	/* Scoreboard fields */
+	git_commit *final;
+	git_blame__entry *ent;
+	int num_lines;
+	const char *final_buf;
+	size_t final_buf_size;
+};
+
+git_blame *git_blame__alloc(
+	git_repository *repo,
+	git_blame_options opts,
+	const char *path);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/blame_git.c

@@ -0,0 +1,682 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "blame_git.h"
+
+#include "commit.h"
+#include "blob.h"
+#include "xdiff/xinclude.h"
+#include "diff_xdiff.h"
+
+/*
+ * Origin is refcounted and usually we keep the blob contents to be
+ * reused.
+ */
+static git_blame__origin *origin_incref(git_blame__origin *o)
+{
+	if (o)
+		o->refcnt++;
+	return o;
+}
+
+static void origin_decref(git_blame__origin *o)
+{
+	if (o && --o->refcnt <= 0) {
+		if (o->previous)
+			origin_decref(o->previous);
+		git_blob_free(o->blob);
+		git_commit_free(o->commit);
+		git__free(o);
+	}
+}
+
+/* Given a commit and a path in it, create a new origin structure. */
+static int make_origin(git_blame__origin **out, git_commit *commit, const char *path)
+{
+	git_blame__origin *o;
+	git_object *blob;
+	size_t path_len = strlen(path), alloc_len;
+	int error = 0;
+
+	if ((error = git_object_lookup_bypath(&blob, (git_object*)commit,
+			path, GIT_OBJECT_BLOB)) < 0)
+		return error;
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, sizeof(*o), path_len);
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, 1);
+	o = git__calloc(1, alloc_len);
+	GIT_ERROR_CHECK_ALLOC(o);
+
+	o->commit = commit;
+	o->blob = (git_blob *) blob;
+	o->refcnt = 1;
+	strcpy(o->path, path);
+
+	*out = o;
+
+	return 0;
+}
+
+/* Locate an existing origin or create a new one. */
+int git_blame__get_origin(
+		git_blame__origin **out,
+		git_blame *blame,
+		git_commit *commit,
+		const char *path)
+{
+	git_blame__entry *e;
+
+	for (e = blame->ent; e; e = e->next) {
+		if (e->suspect->commit == commit && !strcmp(e->suspect->path, path)) {
+			*out = origin_incref(e->suspect);
+		}
+	}
+	return make_origin(out, commit, path);
+}
+
+typedef struct blame_chunk_cb_data {
+	git_blame *blame;
+	git_blame__origin *target;
+	git_blame__origin *parent;
+	long tlno;
+	long plno;
+}blame_chunk_cb_data;
+
+static bool same_suspect(git_blame__origin *a, git_blame__origin *b)
+{
+	if (a == b)
+		return true;
+	if (git_oid_cmp(git_commit_id(a->commit), git_commit_id(b->commit)))
+		return false;
+	return 0 == strcmp(a->path, b->path);
+}
+
+/* find the line number of the last line the target is suspected for */
+static bool find_last_in_target(size_t *out, git_blame *blame, git_blame__origin *target)
+{
+	git_blame__entry *e;
+	size_t last_in_target = 0;
+	bool found = false;
+
+	*out = 0;
+
+	for (e=blame->ent; e; e=e->next) {
+		if (e->guilty || !same_suspect(e->suspect, target))
+			continue;
+		if (last_in_target < e->s_lno + e->num_lines) {
+			found = true;
+			last_in_target = e->s_lno + e->num_lines;
+		}
+	}
+
+	*out = last_in_target;
+	return found;
+}
+
+/*
+ * It is known that lines between tlno to same came from parent, and e
+ * has an overlap with that range.  it also is known that parent's
+ * line plno corresponds to e's line tlno.
+ *
+ *                <---- e ----->
+ *                   <------>         (entirely within)
+ *                   <------------>   (extends past)
+ *             <------------>         (starts before)
+ *             <------------------>   (entirely encloses)
+ *
+ * Split e into potentially three parts; before this chunk, the chunk
+ * to be blamed for the parent, and after that portion.
+ */
+static void split_overlap(git_blame__entry *split, git_blame__entry *e,
+		size_t tlno, size_t plno, size_t same, git_blame__origin *parent)
+{
+	size_t chunk_end_lno;
+
+	if (e->s_lno < tlno) {
+		/* there is a pre-chunk part not blamed on the parent */
+		split[0].suspect = origin_incref(e->suspect);
+		split[0].lno = e->lno;
+		split[0].s_lno = e->s_lno;
+		split[0].num_lines = tlno - e->s_lno;
+		split[1].lno = e->lno + tlno - e->s_lno;
+		split[1].s_lno = plno;
+	} else {
+		split[1].lno = e->lno;
+		split[1].s_lno = plno + (e->s_lno - tlno);
+	}
+
+	if (same < e->s_lno + e->num_lines) {
+		/* there is a post-chunk part not blamed on parent */
+		split[2].suspect = origin_incref(e->suspect);
+		split[2].lno = e->lno + (same - e->s_lno);
+		split[2].s_lno = e->s_lno + (same - e->s_lno);
+		split[2].num_lines = e->s_lno + e->num_lines - same;
+		chunk_end_lno = split[2].lno;
+	} else {
+		chunk_end_lno = e->lno + e->num_lines;
+	}
+	split[1].num_lines = chunk_end_lno - split[1].lno;
+
+	/*
+	 * if it turns out there is nothing to blame the parent for, forget about
+	 * the splitting. !split[1].suspect signals this.
+	 */
+	if (split[1].num_lines < 1)
+		return;
+	split[1].suspect = origin_incref(parent);
+}
+
+/*
+ * Link in a new blame entry to the scoreboard. Entries that cover the same
+ * line range have been removed from the scoreboard previously.
+ */
+static void add_blame_entry(git_blame *blame, git_blame__entry *e)
+{
+	git_blame__entry *ent, *prev = NULL;
+
+	origin_incref(e->suspect);
+
+	for (ent = blame->ent; ent && ent->lno < e->lno; ent = ent->next)
+		prev = ent;
+
+	/* prev, if not NULL, is the last one that is below e */
+	e->prev = prev;
+	if (prev) {
+		e->next = prev->next;
+		prev->next = e;
+	} else {
+		e->next = blame->ent;
+		blame->ent = e;
+	}
+	if (e->next)
+		e->next->prev = e;
+}
+
+/*
+ * src typically is on-stack; we want to copy the information in it to
+ * a malloced blame_entry that is already on the linked list of the scoreboard.
+ * The origin of dst loses a refcnt while the origin of src gains one.
+ */
+static void dup_entry(git_blame__entry *dst, git_blame__entry *src)
+{
+	git_blame__entry *p, *n;
+
+	p = dst->prev;
+	n = dst->next;
+	origin_incref(src->suspect);
+	origin_decref(dst->suspect);
+	memcpy(dst, src, sizeof(*src));
+	dst->prev = p;
+	dst->next = n;
+	dst->score = 0;
+}
+
+/*
+ * split_overlap() divided an existing blame e into up to three parts in split.
+ * Adjust the linked list of blames in the scoreboard to reflect the split.
+ */
+static int split_blame(git_blame *blame, git_blame__entry *split, git_blame__entry *e)
+{
+	git_blame__entry *new_entry;
+
+	if (split[0].suspect && split[2].suspect) {
+		/* The first part (reuse storage for the existing entry e */
+		dup_entry(e, &split[0]);
+
+		/* The last part -- me */
+		new_entry = git__malloc(sizeof(*new_entry));
+		GIT_ERROR_CHECK_ALLOC(new_entry);
+		memcpy(new_entry, &(split[2]), sizeof(git_blame__entry));
+		add_blame_entry(blame, new_entry);
+
+		/* ... and the middle part -- parent */
+		new_entry = git__malloc(sizeof(*new_entry));
+		GIT_ERROR_CHECK_ALLOC(new_entry);
+		memcpy(new_entry, &(split[1]), sizeof(git_blame__entry));
+		add_blame_entry(blame, new_entry);
+	} else if (!split[0].suspect && !split[2].suspect) {
+		/*
+		 * The parent covers the entire area; reuse storage for e and replace it
+		 * with the parent
+		 */
+		dup_entry(e, &split[1]);
+	} else if (split[0].suspect) {
+		/* me and then parent */
+		dup_entry(e, &split[0]);
+		new_entry = git__malloc(sizeof(*new_entry));
+		GIT_ERROR_CHECK_ALLOC(new_entry);
+		memcpy(new_entry, &(split[1]), sizeof(git_blame__entry));
+		add_blame_entry(blame, new_entry);
+	} else {
+		/* parent and then me */
+		dup_entry(e, &split[1]);
+		new_entry = git__malloc(sizeof(*new_entry));
+		GIT_ERROR_CHECK_ALLOC(new_entry);
+		memcpy(new_entry, &(split[2]), sizeof(git_blame__entry));
+		add_blame_entry(blame, new_entry);
+	}
+
+	return 0;
+}
+
+/*
+ * After splitting the blame, the origins used by the on-stack blame_entry
+ * should lose one refcnt each.
+ */
+static void decref_split(git_blame__entry *split)
+{
+	int i;
+	for (i=0; i<3; i++)
+		origin_decref(split[i].suspect);
+}
+
+/*
+ * Helper for blame_chunk(). blame_entry e is known to overlap with the patch
+ * hunk; split it and pass blame to the parent.
+ */
+static int blame_overlap(
+		git_blame *blame,
+		git_blame__entry *e,
+		size_t tlno,
+		size_t plno,
+		size_t same,
+		git_blame__origin *parent)
+{
+	git_blame__entry split[3] = {{0}};
+
+	split_overlap(split, e, tlno, plno, same, parent);
+	if (split[1].suspect)
+		if (split_blame(blame, split, e) < 0)
+			return -1;
+	decref_split(split);
+
+	return 0;
+}
+
+/*
+ * Process one hunk from the patch between the current suspect for blame_entry
+ * e and its parent. Find and split the overlap, and pass blame to the
+ * overlapping part to the parent.
+ */
+static int blame_chunk(
+		git_blame *blame,
+		size_t tlno,
+		size_t plno,
+		size_t same,
+		git_blame__origin *target,
+		git_blame__origin *parent)
+{
+	git_blame__entry *e;
+
+	for (e = blame->ent; e; e = e->next) {
+		if (e->guilty || !same_suspect(e->suspect, target))
+			continue;
+		if (same <= e->s_lno)
+			continue;
+		if (tlno < e->s_lno + e->num_lines) {
+			if (blame_overlap(blame, e, tlno, plno, same, parent) < 0)
+				return -1;
+		}
+	}
+
+	return 0;
+}
+
+static int my_emit(
+	long start_a, long count_a,
+	long start_b, long count_b,
+	void *cb_data)
+{
+	blame_chunk_cb_data *d = (blame_chunk_cb_data *)cb_data;
+
+	if (blame_chunk(d->blame, d->tlno, d->plno, start_b, d->target, d->parent) < 0)
+		return -1;
+	d->plno = start_a + count_a;
+	d->tlno = start_b + count_b;
+
+	return 0;
+}
+
+static void trim_common_tail(mmfile_t *a, mmfile_t *b, long ctx)
+{
+	const int blk = 1024;
+	long trimmed = 0, recovered = 0;
+	char *ap = a->ptr + a->size;
+	char *bp = b->ptr + b->size;
+	long smaller = (long)((a->size < b->size) ? a->size : b->size);
+
+	if (ctx)
+		return;
+
+	while (blk + trimmed <= smaller && !memcmp(ap - blk, bp - blk, blk)) {
+		trimmed += blk;
+		ap -= blk;
+		bp -= blk;
+	}
+
+	while (recovered < trimmed)
+		if (ap[recovered++] == '\n')
+			break;
+	a->size -= trimmed - recovered;
+	b->size -= trimmed - recovered;
+}
+
+static int diff_hunks(mmfile_t file_a, mmfile_t file_b, void *cb_data)
+{
+	xpparam_t xpp = {0};
+	xdemitconf_t xecfg = {0};
+	xdemitcb_t ecb = {0};
+
+	xecfg.hunk_func = my_emit;
+	ecb.priv = cb_data;
+
+	trim_common_tail(&file_a, &file_b, 0);
+
+	if (file_a.size > GIT_XDIFF_MAX_SIZE ||
+		file_b.size > GIT_XDIFF_MAX_SIZE) {
+		git_error_set(GIT_ERROR_INVALID, "file too large to blame");
+		return -1;
+	}
+
+	return xdl_diff(&file_a, &file_b, &xpp, &xecfg, &ecb);
+}
+
+static void fill_origin_blob(git_blame__origin *o, mmfile_t *file)
+{
+	memset(file, 0, sizeof(*file));
+	if (o->blob) {
+		file->ptr = (char*)git_blob_rawcontent(o->blob);
+		file->size = (size_t)git_blob_rawsize(o->blob);
+	}
+}
+
+static int pass_blame_to_parent(
+		git_blame *blame,
+		git_blame__origin *target,
+		git_blame__origin *parent)
+{
+	size_t last_in_target;
+	mmfile_t file_p, file_o;
+	blame_chunk_cb_data d = { blame, target, parent, 0, 0 };
+
+	if (!find_last_in_target(&last_in_target, blame, target))
+		return 1; /* nothing remains for this target */
+
+	fill_origin_blob(parent, &file_p);
+	fill_origin_blob(target, &file_o);
+
+	if (diff_hunks(file_p, file_o, &d) < 0)
+		return -1;
+
+	/* The reset (i.e. anything after tlno) are the same as the parent */
+	if (blame_chunk(blame, d.tlno, d.plno, last_in_target, target, parent) < 0)
+		return -1;
+
+	return 0;
+}
+
+static int paths_on_dup(void **old, void *new)
+{
+	GIT_UNUSED(old);
+	git__free(new);
+	return -1;
+}
+
+static git_blame__origin* find_origin(
+		git_blame *blame,
+		git_commit *parent,
+		git_blame__origin *origin)
+{
+	git_blame__origin *porigin = NULL;
+	git_diff *difflist = NULL;
+	git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
+	git_tree *otree=NULL, *ptree=NULL;
+
+	/* Get the trees from this commit and its parent */
+	if (0 != git_commit_tree(&otree, origin->commit) ||
+	    0 != git_commit_tree(&ptree, parent))
+		goto cleanup;
+
+	/* Configure the diff */
+	diffopts.context_lines = 0;
+	diffopts.flags = GIT_DIFF_SKIP_BINARY_CHECK;
+
+	/* Check to see if files we're interested have changed */
+	diffopts.pathspec.count = blame->paths.length;
+	diffopts.pathspec.strings = (char**)blame->paths.contents;
+	if (0 != git_diff_tree_to_tree(&difflist, blame->repository, ptree, otree, &diffopts))
+			goto cleanup;
+
+	if (!git_diff_num_deltas(difflist)) {
+		/* No changes; copy data */
+		git_blame__get_origin(&porigin, blame, parent, origin->path);
+	} else {
+		git_diff_find_options findopts = GIT_DIFF_FIND_OPTIONS_INIT;
+		int i;
+
+		/* Generate a full diff between the two trees */
+		git_diff_free(difflist);
+		diffopts.pathspec.count = 0;
+		if (0 != git_diff_tree_to_tree(&difflist, blame->repository, ptree, otree, &diffopts))
+			goto cleanup;
+
+		/* Let diff find renames */
+		findopts.flags = GIT_DIFF_FIND_RENAMES;
+		if (0 != git_diff_find_similar(difflist, &findopts))
+			goto cleanup;
+
+		/* Find one that matches */
+		for (i=0; i<(int)git_diff_num_deltas(difflist); i++) {
+			const git_diff_delta *delta = git_diff_get_delta(difflist, i);
+
+			if (!git_vector_bsearch(NULL, &blame->paths, delta->new_file.path))
+			{
+				git_vector_insert_sorted(&blame->paths, (void*)git__strdup(delta->old_file.path),
+						paths_on_dup);
+				make_origin(&porigin, parent, delta->old_file.path);
+			}
+		}
+	}
+
+cleanup:
+	git_diff_free(difflist);
+	git_tree_free(otree);
+	git_tree_free(ptree);
+	return porigin;
+}
+
+/*
+ * The blobs of origin and porigin exactly match, so everything origin is
+ * suspected for can be blamed on the parent.
+ */
+static int pass_whole_blame(git_blame *blame,
+		git_blame__origin *origin, git_blame__origin *porigin)
+{
+	git_blame__entry *e;
+
+	if (!porigin->blob &&
+	    git_object_lookup((git_object**)&porigin->blob, blame->repository,
+				git_blob_id(origin->blob), GIT_OBJECT_BLOB) < 0)
+		return -1;
+	for (e=blame->ent; e; e=e->next) {
+		if (!same_suspect(e->suspect, origin))
+			continue;
+		origin_incref(porigin);
+		origin_decref(e->suspect);
+		e->suspect = porigin;
+	}
+
+	return 0;
+}
+
+static int pass_blame(git_blame *blame, git_blame__origin *origin, uint32_t opt)
+{
+	git_commit *commit = origin->commit;
+	int i, num_parents;
+	git_blame__origin *sg_buf[16];
+	git_blame__origin *porigin, **sg_origin = sg_buf;
+	int ret, error = 0;
+
+	num_parents = git_commit_parentcount(commit);
+	if (!git_oid_cmp(git_commit_id(commit), &blame->options.oldest_commit))
+		/* Stop at oldest specified commit */
+		num_parents = 0;
+	else if (opt & GIT_BLAME_FIRST_PARENT && num_parents > 1)
+		/* Limit search to the first parent */
+		num_parents = 1;
+
+	if (!num_parents) {
+		git_oid_cpy(&blame->options.oldest_commit, git_commit_id(commit));
+		goto finish;
+	} else if (num_parents < (int)ARRAY_SIZE(sg_buf))
+		memset(sg_buf, 0, sizeof(sg_buf));
+	else {
+		sg_origin = git__calloc(num_parents, sizeof(*sg_origin));
+		GIT_ERROR_CHECK_ALLOC(sg_origin);
+	}
+
+	for (i=0; i<num_parents; i++) {
+		git_commit *p;
+		int j, same;
+
+		if (sg_origin[i])
+			continue;
+
+		if ((error = git_commit_parent(&p, origin->commit, i)) < 0)
+			goto finish;
+		porigin = find_origin(blame, p, origin);
+
+		if (!porigin) {
+			/*
+			 * We only have to decrement the parent's
+			 * reference count when no porigin has
+			 * been created, as otherwise the commit
+			 * is assigned to the created object.
+			 */
+			git_commit_free(p);
+			continue;
+		}
+		if (porigin->blob && origin->blob &&
+		    !git_oid_cmp(git_blob_id(porigin->blob), git_blob_id(origin->blob))) {
+			error = pass_whole_blame(blame, origin, porigin);
+			origin_decref(porigin);
+			goto finish;
+		}
+		for (j = same = 0; j<i; j++)
+			if (sg_origin[j] &&
+				 !git_oid_cmp(git_blob_id(sg_origin[j]->blob), git_blob_id(porigin->blob))) {
+				same = 1;
+				break;
+			}
+		if (!same)
+			sg_origin[i] = porigin;
+		else
+			origin_decref(porigin);
+	}
+
+	/* Standard blame */
+	for (i=0; i<num_parents; i++) {
+		git_blame__origin *porigin = sg_origin[i];
+		if (!porigin)
+			continue;
+		if (!origin->previous) {
+			origin_incref(porigin);
+			origin->previous = porigin;
+		}
+
+		if ((ret = pass_blame_to_parent(blame, origin, porigin)) != 0) {
+			if (ret < 0)
+				error = -1;
+
+			goto finish;
+		}
+	}
+
+	/* TODO: optionally find moves in parents' files */
+
+	/* TODO: optionally find copies in parents' files */
+
+finish:
+	for (i=0; i<num_parents; i++)
+		if (sg_origin[i])
+			origin_decref(sg_origin[i]);
+	if (sg_origin != sg_buf)
+		git__free(sg_origin);
+	return error;
+}
+
+/*
+ * If two blame entries that are next to each other came from
+ * contiguous lines in the same origin (i.e. <commit, path> pair),
+ * merge them together.
+ */
+static void coalesce(git_blame *blame)
+{
+	git_blame__entry *ent, *next;
+
+	for (ent=blame->ent; ent && (next = ent->next); ent = next) {
+		if (same_suspect(ent->suspect, next->suspect) &&
+		    ent->guilty == next->guilty &&
+		    ent->s_lno + ent->num_lines == next->s_lno)
+		{
+			ent->num_lines += next->num_lines;
+			ent->next = next->next;
+			if (ent->next)
+				ent->next->prev = ent;
+			origin_decref(next->suspect);
+			git__free(next);
+			ent->score = 0;
+			next = ent; /* again */
+		}
+	}
+}
+
+int git_blame__like_git(git_blame *blame, uint32_t opt)
+{
+	int error = 0;
+
+	while (true) {
+		git_blame__entry *ent;
+		git_blame__origin *suspect = NULL;
+
+		/* Find a suspect to break down */
+		for (ent = blame->ent; !suspect && ent; ent = ent->next)
+			if (!ent->guilty)
+				suspect = ent->suspect;
+		if (!suspect)
+			break;
+
+		/* We'll use this suspect later in the loop, so hold on to it for now. */
+		origin_incref(suspect);
+
+		if ((error = pass_blame(blame, suspect, opt)) < 0)
+			break;
+
+		/* Take responsibility for the remaining entries */
+		for (ent = blame->ent; ent; ent = ent->next) {
+			if (same_suspect(ent->suspect, suspect)) {
+				ent->guilty = true;
+				ent->is_boundary = !git_oid_cmp(
+						git_commit_id(suspect->commit),
+						&blame->options.oldest_commit);
+			}
+		}
+		origin_decref(suspect);
+	}
+
+	if (!error)
+		coalesce(blame);
+
+	return error;
+}
+
+void git_blame__free_entry(git_blame__entry *ent)
+{
+	if (!ent) return;
+	origin_decref(ent->suspect);
+	git__free(ent);
+}

node_modules/nodegit/vendor/libgit2/src/blame_git.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_blame_git__
+#define INCLUDE_blame_git__
+
+#include "common.h"
+
+#include "blame.h"
+
+int git_blame__get_origin(
+		git_blame__origin **out,
+		git_blame *sb,
+		git_commit *commit,
+		const char *path);
+void git_blame__free_entry(git_blame__entry *ent);
+int git_blame__like_git(git_blame *sb, uint32_t flags);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/blob.c

@@ -0,0 +1,493 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "blob.h"
+
+#include "git2/common.h"
+#include "git2/object.h"
+#include "git2/repository.h"
+#include "git2/odb_backend.h"
+
+#include "filebuf.h"
+#include "filter.h"
+#include "buf_text.h"
+
+const void *git_blob_rawcontent(const git_blob *blob)
+{
+	assert(blob);
+	if (blob->raw)
+		return blob->data.raw.data;
+	else
+		return git_odb_object_data(blob->data.odb);
+}
+
+git_object_size_t git_blob_rawsize(const git_blob *blob)
+{
+	assert(blob);
+	if (blob->raw)
+		return blob->data.raw.size;
+	else
+		return (git_object_size_t)git_odb_object_size(blob->data.odb);
+}
+
+int git_blob__getbuf(git_buf *buffer, git_blob *blob)
+{
+	git_object_size_t size = git_blob_rawsize(blob);
+
+	GIT_ERROR_CHECK_BLOBSIZE(size);
+	return git_buf_set(buffer, git_blob_rawcontent(blob), (size_t)size);
+}
+
+void git_blob__free(void *_blob)
+{
+	git_blob *blob = (git_blob *) _blob;
+	if (!blob->raw)
+		git_odb_object_free(blob->data.odb);
+	git__free(blob);
+}
+
+int git_blob__parse_raw(void *_blob, const char *data, size_t size)
+{
+	git_blob *blob = (git_blob *) _blob;
+	assert(blob);
+	blob->raw = 1;
+	blob->data.raw.data = data;
+	blob->data.raw.size = size;
+	return 0;
+}
+
+int git_blob__parse(void *_blob, git_odb_object *odb_obj)
+{
+	git_blob *blob = (git_blob *) _blob;
+	assert(blob);
+	git_cached_obj_incref((git_cached_obj *)odb_obj);
+	blob->raw = 0;
+	blob->data.odb = odb_obj;
+	return 0;
+}
+
+int git_blob_create_from_buffer(
+	git_oid *id, git_repository *repo, const void *buffer, size_t len)
+{
+	int error;
+	git_odb *odb;
+	git_odb_stream *stream;
+
+	assert(id && repo);
+
+	if ((error = git_repository_odb__weakptr(&odb, repo)) < 0 ||
+		(error = git_odb_open_wstream(&stream, odb, len, GIT_OBJECT_BLOB)) < 0)
+		return error;
+
+	if ((error = git_odb_stream_write(stream, buffer, len)) == 0)
+		error = git_odb_stream_finalize_write(id, stream);
+
+	git_odb_stream_free(stream);
+	return error;
+}
+
+static int write_file_stream(
+	git_oid *id, git_odb *odb, const char *path, git_object_size_t file_size)
+{
+	int fd, error;
+	char buffer[FILEIO_BUFSIZE];
+	git_odb_stream *stream = NULL;
+	ssize_t read_len = -1;
+	git_object_size_t written = 0;
+
+	if ((error = git_odb_open_wstream(
+			&stream, odb, file_size, GIT_OBJECT_BLOB)) < 0)
+		return error;
+
+	if ((fd = git_futils_open_ro(path)) < 0) {
+		git_odb_stream_free(stream);
+		return -1;
+	}
+
+	while (!error && (read_len = p_read(fd, buffer, sizeof(buffer))) > 0) {
+		error = git_odb_stream_write(stream, buffer, read_len);
+		written += read_len;
+	}
+
+	p_close(fd);
+
+	if (written != file_size || read_len < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to read file into stream");
+		error = -1;
+	}
+
+	if (!error)
+		error = git_odb_stream_finalize_write(id, stream);
+
+	git_odb_stream_free(stream);
+	return error;
+}
+
+static int write_file_filtered(
+	git_oid *id,
+	git_object_size_t *size,
+	git_odb *odb,
+	const char *full_path,
+	git_filter_list *fl)
+{
+	int error;
+	git_buf tgt = GIT_BUF_INIT;
+
+	error = git_filter_list_apply_to_file(&tgt, fl, NULL, full_path);
+
+	/* Write the file to disk if it was properly filtered */
+	if (!error) {
+		*size = tgt.size;
+
+		error = git_odb_write(id, odb, tgt.ptr, tgt.size, GIT_OBJECT_BLOB);
+	}
+
+	git_buf_dispose(&tgt);
+	return error;
+}
+
+static int write_symlink(
+	git_oid *id, git_odb *odb, const char *path, size_t link_size)
+{
+	char *link_data;
+	ssize_t read_len;
+	int error;
+
+	link_data = git__malloc(link_size);
+	GIT_ERROR_CHECK_ALLOC(link_data);
+
+	read_len = p_readlink(path, link_data, link_size);
+	if (read_len != (ssize_t)link_size) {
+		git_error_set(GIT_ERROR_OS, "failed to create blob: cannot read symlink '%s'", path);
+		git__free(link_data);
+		return -1;
+	}
+
+	error = git_odb_write(id, odb, (void *)link_data, link_size, GIT_OBJECT_BLOB);
+	git__free(link_data);
+	return error;
+}
+
+int git_blob__create_from_paths(
+	git_oid *id,
+	struct stat *out_st,
+	git_repository *repo,
+	const char *content_path,
+	const char *hint_path,
+	mode_t hint_mode,
+	bool try_load_filters)
+{
+	int error;
+	struct stat st;
+	git_odb *odb = NULL;
+	git_object_size_t size;
+	mode_t mode;
+	git_buf path = GIT_BUF_INIT;
+
+	assert(hint_path || !try_load_filters);
+
+	if (!content_path) {
+		if (git_repository__ensure_not_bare(repo, "create blob from file") < 0)
+			return GIT_EBAREREPO;
+
+		if (git_buf_joinpath(
+				&path, git_repository_workdir(repo), hint_path) < 0)
+			return -1;
+
+		content_path = path.ptr;
+	}
+
+	if ((error = git_path_lstat(content_path, &st)) < 0 ||
+		(error = git_repository_odb(&odb, repo)) < 0)
+		goto done;
+
+	if (S_ISDIR(st.st_mode)) {
+		git_error_set(GIT_ERROR_ODB, "cannot create blob from '%s': it is a directory", content_path);
+		error = GIT_EDIRECTORY;
+		goto done;
+	}
+
+	if (out_st)
+		memcpy(out_st, &st, sizeof(st));
+
+	size = st.st_size;
+	mode = hint_mode ? hint_mode : st.st_mode;
+
+	if (S_ISLNK(mode)) {
+		error = write_symlink(id, odb, content_path, (size_t)size);
+	} else {
+		git_filter_list *fl = NULL;
+
+		if (try_load_filters)
+			/* Load the filters for writing this file to the ODB */
+			error = git_filter_list_load(
+				&fl, repo, NULL, hint_path,
+				GIT_FILTER_TO_ODB, GIT_FILTER_DEFAULT);
+
+		if (error < 0)
+			/* well, that didn't work */;
+		else if (fl == NULL)
+			/* No filters need to be applied to the document: we can stream
+			 * directly from disk */
+			error = write_file_stream(id, odb, content_path, size);
+		else {
+			/* We need to apply one or more filters */
+			error = write_file_filtered(id, &size, odb, content_path, fl);
+
+			git_filter_list_free(fl);
+		}
+
+		/*
+		 * TODO: eventually support streaming filtered files, for files
+		 * which are bigger than a given threshold. This is not a priority
+		 * because applying a filter in streaming mode changes the final
+		 * size of the blob, and without knowing its final size, the blob
+		 * cannot be written in stream mode to the ODB.
+		 *
+		 * The plan is to do streaming writes to a tempfile on disk and then
+		 * opening streaming that file to the ODB, using
+		 * `write_file_stream`.
+		 *
+		 * CAREFULLY DESIGNED APIS YO
+		 */
+	}
+
+done:
+	git_odb_free(odb);
+	git_buf_dispose(&path);
+
+	return error;
+}
+
+int git_blob_create_from_workdir(
+	git_oid *id, git_repository *repo, const char *path)
+{
+	return git_blob__create_from_paths(id, NULL, repo, NULL, path, 0, true);
+}
+
+int git_blob_create_from_disk(
+	git_oid *id, git_repository *repo, const char *path)
+{
+	int error;
+	git_buf full_path = GIT_BUF_INIT;
+	const char *workdir, *hintpath;
+
+	if ((error = git_path_prettify(&full_path, path, NULL)) < 0) {
+		git_buf_dispose(&full_path);
+		return error;
+	}
+
+	hintpath = git_buf_cstr(&full_path);
+	workdir  = git_repository_workdir(repo);
+
+	if (workdir && !git__prefixcmp(hintpath, workdir))
+		hintpath += strlen(workdir);
+
+	error = git_blob__create_from_paths(
+		id, NULL, repo, git_buf_cstr(&full_path), hintpath, 0, true);
+
+	git_buf_dispose(&full_path);
+	return error;
+}
+
+typedef struct {
+	git_writestream parent;
+	git_filebuf fbuf;
+	git_repository *repo;
+	char *hintpath;
+} blob_writestream;
+
+static int blob_writestream_close(git_writestream *_stream)
+{
+	blob_writestream *stream = (blob_writestream *) _stream;
+
+	git_filebuf_cleanup(&stream->fbuf);
+	return 0;
+}
+
+static void blob_writestream_free(git_writestream *_stream)
+{
+	blob_writestream *stream = (blob_writestream *) _stream;
+
+	git_filebuf_cleanup(&stream->fbuf);
+	git__free(stream->hintpath);
+	git__free(stream);
+}
+
+static int blob_writestream_write(git_writestream *_stream, const char *buffer, size_t len)
+{
+	blob_writestream *stream = (blob_writestream *) _stream;
+
+	return git_filebuf_write(&stream->fbuf, buffer, len);
+}
+
+int git_blob_create_from_stream(git_writestream **out, git_repository *repo, const char *hintpath)
+{
+	int error;
+	git_buf path = GIT_BUF_INIT;
+	blob_writestream *stream;
+
+	assert(out && repo);
+
+	stream = git__calloc(1, sizeof(blob_writestream));
+	GIT_ERROR_CHECK_ALLOC(stream);
+
+	if (hintpath) {
+		stream->hintpath = git__strdup(hintpath);
+		GIT_ERROR_CHECK_ALLOC(stream->hintpath);
+	}
+
+	stream->repo = repo;
+	stream->parent.write = blob_writestream_write;
+	stream->parent.close = blob_writestream_close;
+	stream->parent.free  = blob_writestream_free;
+
+	if ((error = git_repository_item_path(&path, repo, GIT_REPOSITORY_ITEM_OBJECTS)) < 0
+		|| (error = git_buf_joinpath(&path, path.ptr, "streamed")) < 0)
+		goto cleanup;
+
+	if ((error = git_filebuf_open_withsize(&stream->fbuf, git_buf_cstr(&path), GIT_FILEBUF_TEMPORARY,
+					       0666, 2 * 1024 * 1024)) < 0)
+		goto cleanup;
+
+	*out = (git_writestream *) stream;
+
+cleanup:
+	if (error < 0)
+		blob_writestream_free((git_writestream *) stream);
+
+	git_buf_dispose(&path);
+	return error;
+}
+
+int git_blob_create_from_stream_commit(git_oid *out, git_writestream *_stream)
+{
+	int error;
+	blob_writestream *stream = (blob_writestream *) _stream;
+
+	/*
+	 * We can make this more officient by avoiding writing to
+	 * disk, but for now let's re-use the helper functions we
+	 * have.
+	 */
+	if ((error = git_filebuf_flush(&stream->fbuf)) < 0)
+		goto cleanup;
+
+	error = git_blob__create_from_paths(out, NULL, stream->repo, stream->fbuf.path_lock,
+					    stream->hintpath, 0, !!stream->hintpath);
+
+cleanup:
+	blob_writestream_free(_stream);
+	return error;
+
+}
+
+int git_blob_is_binary(const git_blob *blob)
+{
+	git_buf content = GIT_BUF_INIT;
+	git_object_size_t size;
+
+	assert(blob);
+
+	size = git_blob_rawsize(blob);
+
+	git_buf_attach_notowned(&content, git_blob_rawcontent(blob),
+		(size_t)min(size, GIT_FILTER_BYTES_TO_CHECK_NUL));
+	return git_buf_text_is_binary(&content);
+}
+
+int git_blob_filter(
+	git_buf *out,
+	git_blob *blob,
+	const char *path,
+	git_blob_filter_options *given_opts)
+{
+	int error = 0;
+	git_filter_list *fl = NULL;
+	git_blob_filter_options opts = GIT_BLOB_FILTER_OPTIONS_INIT;
+	git_filter_flag_t flags = GIT_FILTER_DEFAULT;
+
+	assert(blob && path && out);
+
+	git_buf_sanitize(out);
+
+	GIT_ERROR_CHECK_VERSION(
+		given_opts, GIT_BLOB_FILTER_OPTIONS_VERSION, "git_blob_filter_options");
+
+	if (given_opts != NULL)
+		memcpy(&opts, given_opts, sizeof(git_blob_filter_options));
+
+	if ((opts.flags & GIT_BLOB_FILTER_CHECK_FOR_BINARY) != 0 &&
+	    git_blob_is_binary(blob))
+		return 0;
+
+	if ((opts.flags & GIT_BLOB_FILTER_NO_SYSTEM_ATTRIBUTES) != 0)
+		flags |= GIT_FILTER_NO_SYSTEM_ATTRIBUTES;
+
+	if ((opts.flags & GIT_BLOB_FILTER_ATTTRIBUTES_FROM_HEAD) != 0)
+		flags |= GIT_FILTER_ATTRIBUTES_FROM_HEAD;
+
+	if (!(error = git_filter_list_load(
+			&fl, git_blob_owner(blob), blob, path,
+			GIT_FILTER_TO_WORKTREE, flags))) {
+
+		error = git_filter_list_apply_to_blob(out, fl, blob);
+
+		git_filter_list_free(fl);
+	}
+
+	return error;
+}
+
+/* Deprecated functions */
+
+int git_blob_create_frombuffer(
+	git_oid *id, git_repository *repo, const void *buffer, size_t len)
+{
+	return git_blob_create_from_buffer(id, repo, buffer, len);
+}
+
+int git_blob_create_fromworkdir(git_oid *id, git_repository *repo, const char *relative_path)
+{
+	return git_blob_create_from_workdir(id, repo, relative_path);
+}
+
+int git_blob_create_fromdisk(git_oid *id, git_repository *repo, const char *path)
+{
+	return git_blob_create_from_disk(id, repo, path);
+}
+
+int git_blob_create_fromstream(
+    git_writestream **out,
+    git_repository *repo,
+    const char *hintpath)
+{
+	return  git_blob_create_from_stream(out, repo, hintpath);
+}
+
+int git_blob_create_fromstream_commit(
+	git_oid *out,
+	git_writestream *stream)
+{
+	return git_blob_create_from_stream_commit(out, stream);
+}
+
+int git_blob_filtered_content(
+	git_buf *out,
+	git_blob *blob,
+	const char *path,
+	int check_for_binary_data)
+{
+	git_blob_filter_options opts = GIT_BLOB_FILTER_OPTIONS_INIT;
+
+	if (check_for_binary_data)
+		opts.flags |= GIT_BLOB_FILTER_CHECK_FOR_BINARY;
+	else
+		opts.flags &= ~GIT_BLOB_FILTER_CHECK_FOR_BINARY;
+
+	return git_blob_filter(out, blob, path, &opts);
+}

node_modules/nodegit/vendor/libgit2/src/blob.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_blob_h__
+#define INCLUDE_blob_h__
+
+#include "common.h"
+
+#include "git2/blob.h"
+#include "repository.h"
+#include "odb.h"
+#include "futils.h"
+
+struct git_blob {
+	git_object object;
+
+	union {
+		git_odb_object *odb;
+		struct {
+			const char *data;
+			git_object_size_t size;
+		} raw;
+	} data;
+	unsigned int raw:1;
+};
+
+#define GIT_ERROR_CHECK_BLOBSIZE(n) \
+	do { \
+		if (!git__is_sizet(n)) { \
+			git_error_set(GIT_ERROR_NOMEMORY, "blob contents too large to fit in memory"); \
+			return -1; \
+		} \
+	} while(0)
+
+void git_blob__free(void *blob);
+int git_blob__parse(void *blob, git_odb_object *obj);
+int git_blob__parse_raw(void *blob, const char *data, size_t size);
+int git_blob__getbuf(git_buf *buffer, git_blob *blob);
+
+extern int git_blob__create_from_paths(
+	git_oid *out_oid,
+	struct stat *out_st,
+	git_repository *repo,
+	const char *full_path,
+	const char *hint_path,
+	mode_t hint_mode,
+	bool apply_filters);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/branch.c

@@ -0,0 +1,727 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "branch.h"
+
+#include "commit.h"
+#include "tag.h"
+#include "config.h"
+#include "refspec.h"
+#include "refs.h"
+#include "remote.h"
+#include "annotated_commit.h"
+#include "worktree.h"
+
+#include "git2/branch.h"
+
+static int retrieve_branch_reference(
+	git_reference **branch_reference_out,
+	git_repository *repo,
+	const char *branch_name,
+	bool is_remote)
+{
+	git_reference *branch = NULL;
+	int error = 0;
+	char *prefix;
+	git_buf ref_name = GIT_BUF_INIT;
+
+	prefix = is_remote ? GIT_REFS_REMOTES_DIR : GIT_REFS_HEADS_DIR;
+
+	if ((error = git_buf_joinpath(&ref_name, prefix, branch_name)) < 0)
+		/* OOM */;
+	else if ((error = git_reference_lookup(&branch, repo, ref_name.ptr)) < 0)
+		git_error_set(
+			GIT_ERROR_REFERENCE, "cannot locate %s branch '%s'",
+			is_remote ? "remote-tracking" : "local", branch_name);
+
+	*branch_reference_out = branch; /* will be NULL on error */
+
+	git_buf_dispose(&ref_name);
+	return error;
+}
+
+static int not_a_local_branch(const char *reference_name)
+{
+	git_error_set(
+		GIT_ERROR_INVALID,
+		"reference '%s' is not a local branch.", reference_name);
+	return -1;
+}
+
+static int create_branch(
+	git_reference **ref_out,
+	git_repository *repository,
+	const char *branch_name,
+	const git_commit *commit,
+	const char *from,
+	int force)
+{
+	int is_unmovable_head = 0;
+	git_reference *branch = NULL;
+	git_buf canonical_branch_name = GIT_BUF_INIT,
+			  log_message = GIT_BUF_INIT;
+	int error = -1;
+	int bare = git_repository_is_bare(repository);
+
+	assert(branch_name && commit && ref_out);
+	assert(git_object_owner((const git_object *)commit) == repository);
+
+	if (!git__strcmp(branch_name, "HEAD")) {
+		git_error_set(GIT_ERROR_REFERENCE, "'HEAD' is not a valid branch name");
+		error = -1;
+		goto cleanup;
+	}
+
+	if (force && !bare && git_branch_lookup(&branch, repository, branch_name, GIT_BRANCH_LOCAL) == 0) {
+		error = git_branch_is_head(branch);
+		git_reference_free(branch);
+		branch = NULL;
+
+		if (error < 0)
+			goto cleanup;
+
+		is_unmovable_head = error;
+	}
+
+	if (is_unmovable_head && force) {
+		git_error_set(GIT_ERROR_REFERENCE, "cannot force update branch '%s' as it is "
+			"the current HEAD of the repository.", branch_name);
+		error = -1;
+		goto cleanup;
+	}
+
+	if (git_buf_joinpath(&canonical_branch_name, GIT_REFS_HEADS_DIR, branch_name) < 0)
+		goto cleanup;
+
+	if (git_buf_printf(&log_message, "branch: Created from %s", from) < 0)
+		goto cleanup;
+
+	error = git_reference_create(&branch, repository,
+		git_buf_cstr(&canonical_branch_name), git_commit_id(commit), force,
+		git_buf_cstr(&log_message));
+
+	if (!error)
+		*ref_out = branch;
+
+cleanup:
+	git_buf_dispose(&canonical_branch_name);
+	git_buf_dispose(&log_message);
+	return error;
+}
+
+int git_branch_create(
+	git_reference **ref_out,
+	git_repository *repository,
+	const char *branch_name,
+	const git_commit *commit,
+	int force)
+{
+	return create_branch(ref_out, repository, branch_name, commit, git_oid_tostr_s(git_commit_id(commit)), force);
+}
+
+int git_branch_create_from_annotated(
+	git_reference **ref_out,
+	git_repository *repository,
+	const char *branch_name,
+	const git_annotated_commit *commit,
+	int force)
+{
+	return create_branch(ref_out,
+		repository, branch_name, commit->commit, commit->description, force);
+}
+
+static int branch_equals(git_repository *repo, const char *path, void *payload)
+{
+	git_reference *branch = (git_reference *) payload;
+	git_reference *head = NULL;
+	int equal = 0;
+
+	if (git_reference__read_head(&head, repo, path) < 0 ||
+		git_reference_type(head) != GIT_REFERENCE_SYMBOLIC)
+		goto done;
+
+	equal = !git__strcmp(head->target.symbolic, branch->name);
+
+done:
+	git_reference_free(head);
+	return equal;
+}
+
+int git_branch_is_checked_out(const git_reference *branch)
+{
+	git_repository *repo;
+	int flags = 0;
+
+	assert(branch);
+
+	if (!git_reference_is_branch(branch))
+		return 0;
+
+	repo = git_reference_owner(branch);
+
+	if (git_repository_is_bare(repo))
+		flags |= GIT_REPOSITORY_FOREACH_HEAD_SKIP_REPO;
+
+	return git_repository_foreach_head(repo, branch_equals, flags, (void *) branch) == 1;
+}
+
+int git_branch_delete(git_reference *branch)
+{
+	int is_head;
+	git_buf config_section = GIT_BUF_INIT;
+	int error = -1;
+
+	assert(branch);
+
+	if (!git_reference_is_branch(branch) && !git_reference_is_remote(branch)) {
+		git_error_set(GIT_ERROR_INVALID, "reference '%s' is not a valid branch.",
+			git_reference_name(branch));
+		return GIT_ENOTFOUND;
+	}
+
+	if ((is_head = git_branch_is_head(branch)) < 0)
+		return is_head;
+
+	if (is_head) {
+		git_error_set(GIT_ERROR_REFERENCE, "cannot delete branch '%s' as it is "
+			"the current HEAD of the repository.", git_reference_name(branch));
+		return -1;
+	}
+
+	if (git_reference_is_branch(branch) && git_branch_is_checked_out(branch)) {
+		git_error_set(GIT_ERROR_REFERENCE, "Cannot delete branch '%s' as it is "
+			"the current HEAD of a linked repository.", git_reference_name(branch));
+		return -1;
+	}
+
+	if (git_buf_join(&config_section, '.', "branch",
+			git_reference_name(branch) + strlen(GIT_REFS_HEADS_DIR)) < 0)
+		goto on_error;
+
+	if (git_config_rename_section(
+		git_reference_owner(branch), git_buf_cstr(&config_section), NULL) < 0)
+		goto on_error;
+
+	error = git_reference_delete(branch);
+
+on_error:
+	git_buf_dispose(&config_section);
+	return error;
+}
+
+typedef struct {
+	git_reference_iterator *iter;
+	unsigned int flags;
+} branch_iter;
+
+int git_branch_next(git_reference **out, git_branch_t *out_type, git_branch_iterator *_iter)
+{
+	branch_iter *iter = (branch_iter *) _iter;
+	git_reference *ref;
+	int error;
+
+	while ((error = git_reference_next(&ref, iter->iter)) == 0) {
+		if ((iter->flags & GIT_BRANCH_LOCAL) &&
+		    !git__prefixcmp(ref->name, GIT_REFS_HEADS_DIR)) {
+			*out = ref;
+			*out_type = GIT_BRANCH_LOCAL;
+
+			return 0;
+		} else  if ((iter->flags & GIT_BRANCH_REMOTE) &&
+			    !git__prefixcmp(ref->name, GIT_REFS_REMOTES_DIR)) {
+			*out = ref;
+			*out_type = GIT_BRANCH_REMOTE;
+
+			return 0;
+		} else {
+			git_reference_free(ref);
+		}
+	}
+
+	return error;
+}
+
+int git_branch_iterator_new(
+	git_branch_iterator **out,
+	git_repository *repo,
+	git_branch_t list_flags)
+{
+	branch_iter *iter;
+
+	iter = git__calloc(1, sizeof(branch_iter));
+	GIT_ERROR_CHECK_ALLOC(iter);
+
+	iter->flags = list_flags;
+
+	if (git_reference_iterator_new(&iter->iter, repo) < 0) {
+		git__free(iter);
+		return -1;
+	}
+
+	*out = (git_branch_iterator *) iter;
+
+	return 0;
+}
+
+void git_branch_iterator_free(git_branch_iterator *_iter)
+{
+	branch_iter *iter = (branch_iter *) _iter;
+
+	if (iter == NULL)
+		return;
+
+	git_reference_iterator_free(iter->iter);
+	git__free(iter);
+}
+
+int git_branch_move(
+	git_reference **out,
+	git_reference *branch,
+	const char *new_branch_name,
+	int force)
+{
+	git_buf new_reference_name = GIT_BUF_INIT,
+	        old_config_section = GIT_BUF_INIT,
+	        new_config_section = GIT_BUF_INIT,
+	        log_message = GIT_BUF_INIT;
+	int error;
+
+	assert(branch && new_branch_name);
+
+	if (!git_reference_is_branch(branch))
+		return not_a_local_branch(git_reference_name(branch));
+
+	if ((error = git_buf_joinpath(&new_reference_name, GIT_REFS_HEADS_DIR, new_branch_name)) < 0)
+		goto done;
+
+	if ((error = git_buf_printf(&log_message, "branch: renamed %s to %s",
+				    git_reference_name(branch), git_buf_cstr(&new_reference_name))) < 0)
+			goto done;
+
+	/* first update ref then config so failure won't trash config */
+
+	error = git_reference_rename(
+		out, branch, git_buf_cstr(&new_reference_name), force,
+		git_buf_cstr(&log_message));
+	if (error < 0)
+		goto done;
+
+	git_buf_join(&old_config_section, '.', "branch",
+		git_reference_name(branch) + strlen(GIT_REFS_HEADS_DIR));
+	git_buf_join(&new_config_section, '.', "branch", new_branch_name);
+
+	error = git_config_rename_section(
+		git_reference_owner(branch),
+		git_buf_cstr(&old_config_section),
+		git_buf_cstr(&new_config_section));
+
+done:
+	git_buf_dispose(&new_reference_name);
+	git_buf_dispose(&old_config_section);
+	git_buf_dispose(&new_config_section);
+	git_buf_dispose(&log_message);
+
+	return error;
+}
+
+int git_branch_lookup(
+	git_reference **ref_out,
+	git_repository *repo,
+	const char *branch_name,
+	git_branch_t branch_type)
+{
+	int error = -1;
+	assert(ref_out && repo && branch_name);
+
+	switch (branch_type) {
+	case GIT_BRANCH_LOCAL:
+	case GIT_BRANCH_REMOTE:
+		error = retrieve_branch_reference(ref_out, repo, branch_name, branch_type == GIT_BRANCH_REMOTE);
+		break;
+	case GIT_BRANCH_ALL:
+		error = retrieve_branch_reference(ref_out, repo, branch_name, false);
+		if (error == GIT_ENOTFOUND)
+			error = retrieve_branch_reference(ref_out, repo, branch_name, true);
+		break;
+	default:
+		assert(false);
+	}
+	return error;
+}
+
+int git_branch_name(
+	const char **out,
+	const git_reference *ref)
+{
+	const char *branch_name;
+
+	assert(out && ref);
+
+	branch_name = ref->name;
+
+	if (git_reference_is_branch(ref)) {
+		branch_name += strlen(GIT_REFS_HEADS_DIR);
+	} else if (git_reference_is_remote(ref)) {
+		branch_name += strlen(GIT_REFS_REMOTES_DIR);
+	} else {
+		git_error_set(GIT_ERROR_INVALID,
+				"reference '%s' is neither a local nor a remote branch.", ref->name);
+		return -1;
+	}
+	*out = branch_name;
+	return 0;
+}
+
+static int retrieve_upstream_configuration(
+	git_buf *out,
+	const git_config *config,
+	const char *canonical_branch_name,
+	const char *format)
+{
+	git_buf buf = GIT_BUF_INIT;
+	int error;
+
+	if (git_buf_printf(&buf, format,
+		canonical_branch_name + strlen(GIT_REFS_HEADS_DIR)) < 0)
+			return -1;
+
+	error = git_config_get_string_buf(out, config, git_buf_cstr(&buf));
+	git_buf_dispose(&buf);
+	return error;
+}
+
+int git_branch_upstream_name(
+	git_buf *out,
+	git_repository *repo,
+	const char *refname)
+{
+	git_buf remote_name = GIT_BUF_INIT;
+	git_buf merge_name = GIT_BUF_INIT;
+	git_buf buf = GIT_BUF_INIT;
+	int error = -1;
+	git_remote *remote = NULL;
+	const git_refspec *refspec;
+	git_config *config;
+
+	assert(out && refname);
+
+	git_buf_sanitize(out);
+
+	if (!git_reference__is_branch(refname))
+		return not_a_local_branch(refname);
+
+	if ((error = git_repository_config_snapshot(&config, repo)) < 0)
+		return error;
+
+	if ((error = retrieve_upstream_configuration(
+		&remote_name, config, refname, "branch.%s.remote")) < 0)
+			goto cleanup;
+
+	if ((error = retrieve_upstream_configuration(
+		&merge_name, config, refname, "branch.%s.merge")) < 0)
+			goto cleanup;
+
+	if (git_buf_len(&remote_name) == 0 || git_buf_len(&merge_name) == 0) {
+		git_error_set(GIT_ERROR_REFERENCE,
+			"branch '%s' does not have an upstream", refname);
+		error = GIT_ENOTFOUND;
+		goto cleanup;
+	}
+
+	if (strcmp(".", git_buf_cstr(&remote_name)) != 0) {
+		if ((error = git_remote_lookup(&remote, repo, git_buf_cstr(&remote_name))) < 0)
+			goto cleanup;
+
+		refspec = git_remote__matching_refspec(remote, git_buf_cstr(&merge_name));
+		if (!refspec) {
+			error = GIT_ENOTFOUND;
+			goto cleanup;
+		}
+
+		if (git_refspec_transform(&buf, refspec, git_buf_cstr(&merge_name)) < 0)
+			goto cleanup;
+	} else
+		if (git_buf_set(&buf, git_buf_cstr(&merge_name), git_buf_len(&merge_name)) < 0)
+			goto cleanup;
+
+	error = git_buf_set(out, git_buf_cstr(&buf), git_buf_len(&buf));
+
+cleanup:
+	git_config_free(config);
+	git_remote_free(remote);
+	git_buf_dispose(&remote_name);
+	git_buf_dispose(&merge_name);
+	git_buf_dispose(&buf);
+	return error;
+}
+
+int git_branch_upstream_remote(git_buf *buf, git_repository *repo, const char *refname)
+{
+	int error;
+	git_config *cfg;
+
+	if (!git_reference__is_branch(refname))
+		return not_a_local_branch(refname);
+
+	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
+		return error;
+
+	git_buf_sanitize(buf);
+
+	if ((error = retrieve_upstream_configuration(buf, cfg, refname, "branch.%s.remote")) < 0)
+		return error;
+
+	if (git_buf_len(buf) == 0) {
+		git_error_set(GIT_ERROR_REFERENCE, "branch '%s' does not have an upstream remote", refname);
+		error = GIT_ENOTFOUND;
+		git_buf_clear(buf);
+	}
+
+	return error;
+}
+
+int git_branch_remote_name(git_buf *buf, git_repository *repo, const char *refname)
+{
+	git_strarray remote_list = {0};
+	size_t i;
+	git_remote *remote;
+	const git_refspec *fetchspec;
+	int error = 0;
+	char *remote_name = NULL;
+
+	assert(buf && repo && refname);
+
+	git_buf_sanitize(buf);
+
+	/* Verify that this is a remote branch */
+	if (!git_reference__is_remote(refname)) {
+		git_error_set(GIT_ERROR_INVALID, "reference '%s' is not a remote branch.",
+			refname);
+		error = GIT_ERROR;
+		goto cleanup;
+	}
+
+	/* Get the remotes */
+	if ((error = git_remote_list(&remote_list, repo)) < 0)
+		goto cleanup;
+
+	/* Find matching remotes */
+	for (i = 0; i < remote_list.count; i++) {
+		if ((error = git_remote_lookup(&remote, repo, remote_list.strings[i])) < 0)
+			continue;
+
+		fetchspec = git_remote__matching_dst_refspec(remote, refname);
+		if (fetchspec) {
+			/* If we have not already set out yet, then set
+			 * it to the matching remote name. Otherwise
+			 * multiple remotes match this reference, and it
+			 * is ambiguous. */
+			if (!remote_name) {
+				remote_name = remote_list.strings[i];
+			} else {
+				git_remote_free(remote);
+
+				git_error_set(GIT_ERROR_REFERENCE,
+					"reference '%s' is ambiguous", refname);
+				error = GIT_EAMBIGUOUS;
+				goto cleanup;
+			}
+		}
+
+		git_remote_free(remote);
+	}
+
+	if (remote_name) {
+		git_buf_clear(buf);
+		error = git_buf_puts(buf, remote_name);
+	} else {
+		git_error_set(GIT_ERROR_REFERENCE,
+			"could not determine remote for '%s'", refname);
+		error = GIT_ENOTFOUND;
+	}
+
+cleanup:
+	if (error < 0)
+		git_buf_dispose(buf);
+
+	git_strarray_free(&remote_list);
+	return error;
+}
+
+int git_branch_upstream(
+	git_reference **tracking_out,
+	const git_reference *branch)
+{
+	int error;
+	git_buf tracking_name = GIT_BUF_INIT;
+
+	if ((error = git_branch_upstream_name(&tracking_name,
+		git_reference_owner(branch), git_reference_name(branch))) < 0)
+			return error;
+
+	error = git_reference_lookup(
+		tracking_out,
+		git_reference_owner(branch),
+		git_buf_cstr(&tracking_name));
+
+	git_buf_dispose(&tracking_name);
+	return error;
+}
+
+static int unset_upstream(git_config *config, const char *shortname)
+{
+	git_buf buf = GIT_BUF_INIT;
+
+	if (git_buf_printf(&buf, "branch.%s.remote", shortname) < 0)
+		return -1;
+
+	if (git_config_delete_entry(config, git_buf_cstr(&buf)) < 0)
+		goto on_error;
+
+	git_buf_clear(&buf);
+	if (git_buf_printf(&buf, "branch.%s.merge", shortname) < 0)
+		goto on_error;
+
+	if (git_config_delete_entry(config, git_buf_cstr(&buf)) < 0)
+		goto on_error;
+
+	git_buf_dispose(&buf);
+	return 0;
+
+on_error:
+	git_buf_dispose(&buf);
+	return -1;
+}
+
+int git_branch_set_upstream(git_reference *branch, const char *branch_name)
+{
+	git_buf key = GIT_BUF_INIT, remote_name = GIT_BUF_INIT, merge_refspec = GIT_BUF_INIT;
+	git_reference *upstream;
+	git_repository *repo;
+	git_remote *remote = NULL;
+	git_config *config;
+	const char *refname, *shortname;
+	int local, error;
+	const git_refspec *fetchspec;
+
+	refname = git_reference_name(branch);
+	if (!git_reference__is_branch(refname))
+		return not_a_local_branch(refname);
+
+	if (git_repository_config__weakptr(&config, git_reference_owner(branch)) < 0)
+		return -1;
+
+	shortname = refname + strlen(GIT_REFS_HEADS_DIR);
+
+	/* We're unsetting, delegate and bail-out */
+	if (branch_name == NULL)
+		return unset_upstream(config, shortname);
+
+	repo = git_reference_owner(branch);
+
+	/* First we need to resolve name to a branch */
+	if (git_branch_lookup(&upstream, repo, branch_name, GIT_BRANCH_LOCAL) == 0)
+		local = 1;
+	else if (git_branch_lookup(&upstream, repo, branch_name, GIT_BRANCH_REMOTE) == 0)
+		local = 0;
+	else {
+		git_error_set(GIT_ERROR_REFERENCE,
+			"cannot set upstream for branch '%s'", shortname);
+		return GIT_ENOTFOUND;
+	}
+
+	/*
+	 * If it's a local-tracking branch, its remote is "." (as "the local
+	 * repository"), and the branch name is simply the refname.
+	 * Otherwise we need to figure out what the remote-tracking branch's
+	 * name on the remote is and use that.
+	 */
+	if (local)
+		error = git_buf_puts(&remote_name, ".");
+	else
+		error = git_branch_remote_name(&remote_name, repo, git_reference_name(upstream));
+
+	if (error < 0)
+		goto on_error;
+
+	/* Update the upsteam branch config with the new name */
+	if (git_buf_printf(&key, "branch.%s.remote", shortname) < 0)
+		goto on_error;
+
+	if (git_config_set_string(config, git_buf_cstr(&key), git_buf_cstr(&remote_name)) < 0)
+		goto on_error;
+
+	if (local) {
+		/* A local branch uses the upstream refname directly */
+		if (git_buf_puts(&merge_refspec, git_reference_name(upstream)) < 0)
+			goto on_error;
+	} else {
+		/* We transform the upstream branch name according to the remote's refspecs */
+		if (git_remote_lookup(&remote, repo, git_buf_cstr(&remote_name)) < 0)
+			goto on_error;
+
+		fetchspec = git_remote__matching_dst_refspec(remote, git_reference_name(upstream));
+		if (!fetchspec || git_refspec_rtransform(&merge_refspec, fetchspec, git_reference_name(upstream)) < 0)
+			goto on_error;
+
+		git_remote_free(remote);
+		remote = NULL;
+	}
+
+	/* Update the merge branch config with the refspec */
+	git_buf_clear(&key);
+	if (git_buf_printf(&key, "branch.%s.merge", shortname) < 0)
+		goto on_error;
+
+	if (git_config_set_string(config, git_buf_cstr(&key), git_buf_cstr(&merge_refspec)) < 0)
+		goto on_error;
+
+	git_reference_free(upstream);
+	git_buf_dispose(&key);
+	git_buf_dispose(&remote_name);
+	git_buf_dispose(&merge_refspec);
+
+	return 0;
+
+on_error:
+	git_reference_free(upstream);
+	git_buf_dispose(&key);
+	git_buf_dispose(&remote_name);
+	git_buf_dispose(&merge_refspec);
+	git_remote_free(remote);
+
+	return -1;
+}
+
+int git_branch_is_head(
+		const git_reference *branch)
+{
+	git_reference *head;
+	bool is_same = false;
+	int error;
+
+	assert(branch);
+
+	if (!git_reference_is_branch(branch))
+		return false;
+
+	error = git_repository_head(&head, git_reference_owner(branch));
+
+	if (error == GIT_EUNBORNBRANCH || error == GIT_ENOTFOUND)
+		return false;
+
+	if (error < 0)
+		return -1;
+
+	is_same = strcmp(
+		git_reference_name(branch),
+		git_reference_name(head)) == 0;
+
+	git_reference_free(head);
+
+	return is_same;
+}

node_modules/nodegit/vendor/libgit2/src/branch.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_branch_h__
+#define INCLUDE_branch_h__
+
+#include "common.h"
+
+#include "buffer.h"
+
+int git_branch_upstream__name(
+	git_buf *tracking_name,
+	git_repository *repo,
+	const char *canonical_branch_name);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/buf_text.c

@@ -0,0 +1,316 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#include "buf_text.h"
+
+int git_buf_text_puts_escaped(
+	git_buf *buf,
+	const char *string,
+	const char *esc_chars,
+	const char *esc_with)
+{
+	const char *scan;
+	size_t total = 0, esc_len = strlen(esc_with), count, alloclen;
+
+	if (!string)
+		return 0;
+
+	for (scan = string; *scan; ) {
+		/* count run of non-escaped characters */
+		count = strcspn(scan, esc_chars);
+		total += count;
+		scan += count;
+		/* count run of escaped characters */
+		count = strspn(scan, esc_chars);
+		total += count * (esc_len + 1);
+		scan += count;
+	}
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, total, 1);
+	if (git_buf_grow_by(buf, alloclen) < 0)
+		return -1;
+
+	for (scan = string; *scan; ) {
+		count = strcspn(scan, esc_chars);
+
+		memmove(buf->ptr + buf->size, scan, count);
+		scan += count;
+		buf->size += count;
+
+		for (count = strspn(scan, esc_chars); count > 0; --count) {
+			/* copy escape sequence */
+			memmove(buf->ptr + buf->size, esc_with, esc_len);
+			buf->size += esc_len;
+			/* copy character to be escaped */
+			buf->ptr[buf->size] = *scan;
+			buf->size++;
+			scan++;
+		}
+	}
+
+	buf->ptr[buf->size] = '\0';
+
+	return 0;
+}
+
+void git_buf_text_unescape(git_buf *buf)
+{
+	buf->size = git__unescape(buf->ptr);
+}
+
+int git_buf_text_crlf_to_lf(git_buf *tgt, const git_buf *src)
+{
+	const char *scan = src->ptr;
+	const char *scan_end = src->ptr + src->size;
+	const char *next = memchr(scan, '\r', src->size);
+	size_t new_size;
+	char *out;
+
+	assert(tgt != src);
+
+	if (!next)
+		return git_buf_set(tgt, src->ptr, src->size);
+
+	/* reduce reallocs while in the loop */
+	GIT_ERROR_CHECK_ALLOC_ADD(&new_size, src->size, 1);
+	if (git_buf_grow(tgt, new_size) < 0)
+		return -1;
+
+	out = tgt->ptr;
+	tgt->size = 0;
+
+	/* Find the next \r and copy whole chunk up to there to tgt */
+	for (; next; scan = next + 1, next = memchr(scan, '\r', scan_end - scan)) {
+		if (next > scan) {
+			size_t copylen = (size_t)(next - scan);
+			memcpy(out, scan, copylen);
+			out += copylen;
+		}
+
+		/* Do not drop \r unless it is followed by \n */
+		if (next + 1 == scan_end || next[1] != '\n')
+			*out++ = '\r';
+	}
+
+	/* Copy remaining input into dest */
+	if (scan < scan_end) {
+		size_t remaining = (size_t)(scan_end - scan);
+		memcpy(out, scan, remaining);
+		out += remaining;
+	}
+
+	tgt->size = (size_t)(out - tgt->ptr);
+	tgt->ptr[tgt->size] = '\0';
+
+	return 0;
+}
+
+int git_buf_text_lf_to_crlf(git_buf *tgt, const git_buf *src)
+{
+	const char *start = src->ptr;
+	const char *end = start + src->size;
+	const char *scan = start;
+	const char *next = memchr(scan, '\n', src->size);
+	size_t alloclen;
+
+	assert(tgt != src);
+
+	if (!next)
+		return git_buf_set(tgt, src->ptr, src->size);
+
+	/* attempt to reduce reallocs while in the loop */
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, src->size, src->size >> 4);
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, alloclen, 1);
+	if (git_buf_grow(tgt, alloclen) < 0)
+		return -1;
+	tgt->size = 0;
+
+	for (; next; scan = next + 1, next = memchr(scan, '\n', end - scan)) {
+		size_t copylen = next - scan;
+
+		/* if we find mixed line endings, carry on */
+		if (copylen && next[-1] == '\r')
+			copylen--;
+
+		GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, copylen, 3);
+		if (git_buf_grow_by(tgt, alloclen) < 0)
+			return -1;
+
+		if (copylen) {
+			memcpy(tgt->ptr + tgt->size, scan, copylen);
+			tgt->size += copylen;
+		}
+
+		tgt->ptr[tgt->size++] = '\r';
+		tgt->ptr[tgt->size++] = '\n';
+	}
+
+	tgt->ptr[tgt->size] = '\0';
+	return git_buf_put(tgt, scan, end - scan);
+}
+
+int git_buf_text_common_prefix(git_buf *buf, const git_strarray *strings)
+{
+	size_t i;
+	const char *str, *pfx;
+
+	git_buf_clear(buf);
+
+	if (!strings || !strings->count)
+		return 0;
+
+	/* initialize common prefix to first string */
+	if (git_buf_sets(buf, strings->strings[0]) < 0)
+		return -1;
+
+	/* go through the rest of the strings, truncating to shared prefix */
+	for (i = 1; i < strings->count; ++i) {
+
+		for (str = strings->strings[i], pfx = buf->ptr;
+			 *str && *str == *pfx; str++, pfx++)
+			/* scanning */;
+
+		git_buf_truncate(buf, pfx - buf->ptr);
+
+		if (!buf->size)
+			break;
+	}
+
+	return 0;
+}
+
+bool git_buf_text_is_binary(const git_buf *buf)
+{
+	const char *scan = buf->ptr, *end = buf->ptr + buf->size;
+	git_bom_t bom;
+	int printable = 0, nonprintable = 0;
+
+	scan += git_buf_text_detect_bom(&bom, buf);
+
+	if (bom > GIT_BOM_UTF8)
+		return 1;
+
+	while (scan < end) {
+		unsigned char c = *scan++;
+
+		/* Printable characters are those above SPACE (0x1F) excluding DEL,
+		 * and including BS, ESC and FF.
+		 */
+		if ((c > 0x1F && c != 127) || c == '\b' || c == '\033' || c == '\014')
+			printable++;
+		else if (c == '\0')
+			return true;
+		else if (!git__isspace(c))
+			nonprintable++;
+	}
+
+	return ((printable >> 7) < nonprintable);
+}
+
+bool git_buf_text_contains_nul(const git_buf *buf)
+{
+	return (memchr(buf->ptr, '\0', buf->size) != NULL);
+}
+
+int git_buf_text_detect_bom(git_bom_t *bom, const git_buf *buf)
+{
+	const char *ptr;
+	size_t len;
+
+	*bom = GIT_BOM_NONE;
+	/* need at least 2 bytes to look for any BOM */
+	if (buf->size < 2)
+		return 0;
+
+	ptr = buf->ptr;
+	len = buf->size;
+
+	switch (*ptr++) {
+	case 0:
+		if (len >= 4 && ptr[0] == 0 && ptr[1] == '\xFE' && ptr[2] == '\xFF') {
+			*bom = GIT_BOM_UTF32_BE;
+			return 4;
+		}
+		break;
+	case '\xEF':
+		if (len >= 3 && ptr[0] == '\xBB' && ptr[1] == '\xBF') {
+			*bom = GIT_BOM_UTF8;
+			return 3;
+		}
+		break;
+	case '\xFE':
+		if (*ptr == '\xFF') {
+			*bom = GIT_BOM_UTF16_BE;
+			return 2;
+		}
+		break;
+	case '\xFF':
+		if (*ptr != '\xFE')
+			break;
+		if (len >= 4 && ptr[1] == 0 && ptr[2] == 0) {
+			*bom = GIT_BOM_UTF32_LE;
+			return 4;
+		} else {
+			*bom = GIT_BOM_UTF16_LE;
+			return 2;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+bool git_buf_text_gather_stats(
+	git_buf_text_stats *stats, const git_buf *buf, bool skip_bom)
+{
+	const char *scan = buf->ptr, *end = buf->ptr + buf->size;
+	int skip;
+
+	memset(stats, 0, sizeof(*stats));
+
+	/* BOM detection */
+	skip = git_buf_text_detect_bom(&stats->bom, buf);
+	if (skip_bom)
+		scan += skip;
+
+	/* Ignore EOF character */
+	if (buf->size > 0 && end[-1] == '\032')
+		end--;
+
+	/* Counting loop */
+	while (scan < end) {
+		unsigned char c = *scan++;
+
+		if (c > 0x1F && c != 0x7F)
+			stats->printable++;
+		else switch (c) {
+			case '\0':
+				stats->nul++;
+				stats->nonprintable++;
+				break;
+			case '\n':
+				stats->lf++;
+				break;
+			case '\r':
+				stats->cr++;
+				if (scan < end && *scan == '\n')
+					stats->crlf++;
+				break;
+			case '\t': case '\f': case '\v': case '\b': case 0x1b: /*ESC*/
+				stats->printable++;
+				break;
+			default:
+				stats->nonprintable++;
+				break;
+			}
+	}
+
+	/* Treat files with a bare CR as binary */
+	return (stats->cr != stats->crlf || stats->nul > 0 ||
+		((stats->printable >> 7) < stats->nonprintable));
+}

node_modules/nodegit/vendor/libgit2/src/buf_text.h

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_buf_text_h__
+#define INCLUDE_buf_text_h__
+
+#include "common.h"
+
+#include "buffer.h"
+
+typedef enum {
+	GIT_BOM_NONE = 0,
+	GIT_BOM_UTF8 = 1,
+	GIT_BOM_UTF16_LE = 2,
+	GIT_BOM_UTF16_BE = 3,
+	GIT_BOM_UTF32_LE = 4,
+	GIT_BOM_UTF32_BE = 5
+} git_bom_t;
+
+typedef struct {
+	git_bom_t bom; /* BOM found at head of text */
+	unsigned int nul, cr, lf, crlf; /* NUL, CR, LF and CRLF counts */
+	unsigned int printable, nonprintable; /* These are just approximations! */
+} git_buf_text_stats;
+
+/**
+ * Append string to buffer, prefixing each character from `esc_chars` with
+ * `esc_with` string.
+ *
+ * @param buf Buffer to append data to
+ * @param string String to escape and append
+ * @param esc_chars Characters to be escaped
+ * @param esc_with String to insert in from of each found character
+ * @return 0 on success, <0 on failure (probably allocation problem)
+ */
+extern int git_buf_text_puts_escaped(
+	git_buf *buf,
+	const char *string,
+	const char *esc_chars,
+	const char *esc_with);
+
+/**
+ * Append string escaping characters that are regex special
+ */
+GIT_INLINE(int) git_buf_text_puts_escape_regex(git_buf *buf, const char *string)
+{
+	return git_buf_text_puts_escaped(buf, string, "^.[]$()|*+?{}\\", "\\");
+}
+
+/**
+ * Unescape all characters in a buffer in place
+ *
+ * I.e. remove backslashes
+ */
+extern void git_buf_text_unescape(git_buf *buf);
+
+/**
+ * Replace all \r\n with \n.
+ *
+ * @return 0 on success, -1 on memory error
+ */
+extern int git_buf_text_crlf_to_lf(git_buf *tgt, const git_buf *src);
+
+/**
+ * Replace all \n with \r\n. Does not modify existing \r\n.
+ *
+ * @return 0 on success, -1 on memory error
+ */
+extern int git_buf_text_lf_to_crlf(git_buf *tgt, const git_buf *src);
+
+/**
+ * Fill buffer with the common prefix of a array of strings
+ *
+ * Buffer will be set to empty if there is no common prefix
+ */
+extern int git_buf_text_common_prefix(git_buf *buf, const git_strarray *strs);
+
+/**
+ * Check quickly if buffer looks like it contains binary data
+ *
+ * @param buf Buffer to check
+ * @return true if buffer looks like non-text data
+ */
+extern bool git_buf_text_is_binary(const git_buf *buf);
+
+/**
+ * Check quickly if buffer contains a NUL byte
+ *
+ * @param buf Buffer to check
+ * @return true if buffer contains a NUL byte
+ */
+extern bool git_buf_text_contains_nul(const git_buf *buf);
+
+/**
+ * Check if a buffer begins with a UTF BOM
+ *
+ * @param bom Set to the type of BOM detected or GIT_BOM_NONE
+ * @param buf Buffer in which to check the first bytes for a BOM
+ * @return Number of bytes of BOM data (or 0 if no BOM found)
+ */
+extern int git_buf_text_detect_bom(git_bom_t *bom, const git_buf *buf);
+
+/**
+ * Gather stats for a piece of text
+ *
+ * Fill the `stats` structure with counts of unreadable characters, carriage
+ * returns, etc, so it can be used in heuristics.  This automatically skips
+ * a trailing EOF (\032 character).  Also it will look for a BOM at the
+ * start of the text and can be told to skip that as well.
+ *
+ * @param stats Structure to be filled in
+ * @param buf Text to process
+ * @param skip_bom Exclude leading BOM from stats if true
+ * @return Does the buffer heuristically look like binary data
+ */
+extern bool git_buf_text_gather_stats(
+	git_buf_text_stats *stats, const git_buf *buf, bool skip_bom);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/buffer.h

@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_buffer_h__
+#define INCLUDE_buffer_h__
+
+#include "common.h"
+#include "git2/strarray.h"
+#include "git2/buffer.h"
+
+/* typedef struct {
+ *  	char   *ptr;
+ *  	size_t asize, size;
+ * } git_buf;
+ */
+
+extern char git_buf__initbuf[];
+extern char git_buf__oom[];
+
+/* Use to initialize buffer structure when git_buf is on stack */
+#define GIT_BUF_INIT { git_buf__initbuf, 0, 0 }
+
+GIT_INLINE(bool) git_buf_is_allocated(const git_buf *buf)
+{
+	return (buf->ptr != NULL && buf->asize > 0);
+}
+
+/**
+ * Initialize a git_buf structure.
+ *
+ * For the cases where GIT_BUF_INIT cannot be used to do static
+ * initialization.
+ */
+extern int git_buf_init(git_buf *buf, size_t initial_size);
+
+/**
+ * Resize the buffer allocation to make more space.
+ *
+ * This will attempt to grow the buffer to accommodate the additional size.
+ * It is similar to `git_buf_grow`, but performs the new size calculation,
+ * checking for overflow.
+ *
+ * Like `git_buf_grow`, if this is a user-supplied buffer, this will allocate
+ * a new buffer.
+ */
+extern int git_buf_grow_by(git_buf *buffer, size_t additional_size);
+
+/**
+ * Attempt to grow the buffer to hold at least `target_size` bytes.
+ *
+ * If the allocation fails, this will return an error.  If `mark_oom` is true,
+ * this will mark the buffer as invalid for future operations; if false,
+ * existing buffer content will be preserved, but calling code must handle
+ * that buffer was not expanded.  If `preserve_external` is true, then any
+ * existing data pointed to be `ptr` even if `asize` is zero will be copied
+ * into the newly allocated buffer.
+ */
+extern int git_buf_try_grow(
+	git_buf *buf, size_t target_size, bool mark_oom);
+
+/**
+ * Sanitizes git_buf structures provided from user input.  Users of the
+ * library, when providing git_buf's, may wish to provide a NULL ptr for
+ * ease of handling.  The buffer routines, however, expect a non-NULL ptr
+ * always.  This helper method simply handles NULL input, converting to a
+ * git_buf__initbuf. If a buffer with a non-NULL ptr is passed in, this method
+ * assures that the buffer is '\0'-terminated.
+ */
+extern void git_buf_sanitize(git_buf *buf);
+
+extern void git_buf_swap(git_buf *buf_a, git_buf *buf_b);
+extern char *git_buf_detach(git_buf *buf);
+extern int git_buf_attach(git_buf *buf, char *ptr, size_t asize);
+
+/* Populates a `git_buf` where the contents are not "owned" by the
+ * buffer, and calls to `git_buf_dispose` will not free the given buf.
+ */
+extern void git_buf_attach_notowned(
+	git_buf *buf, const char *ptr, size_t size);
+
+/**
+ * Test if there have been any reallocation failures with this git_buf.
+ *
+ * Any function that writes to a git_buf can fail due to memory allocation
+ * issues.  If one fails, the git_buf will be marked with an OOM error and
+ * further calls to modify the buffer will fail.  Check git_buf_oom() at the
+ * end of your sequence and it will be true if you ran out of memory at any
+ * point with that buffer.
+ *
+ * @return false if no error, true if allocation error
+ */
+GIT_INLINE(bool) git_buf_oom(const git_buf *buf)
+{
+	return (buf->ptr == git_buf__oom);
+}
+
+/*
+ * Functions below that return int value error codes will return 0 on
+ * success or -1 on failure (which generally means an allocation failed).
+ * Using a git_buf where the allocation has failed with result in -1 from
+ * all further calls using that buffer.  As a result, you can ignore the
+ * return code of these functions and call them in a series then just call
+ * git_buf_oom at the end.
+ */
+int git_buf_sets(git_buf *buf, const char *string);
+int git_buf_putc(git_buf *buf, char c);
+int git_buf_putcn(git_buf *buf, char c, size_t len);
+int git_buf_put(git_buf *buf, const char *data, size_t len);
+int git_buf_puts(git_buf *buf, const char *string);
+int git_buf_printf(git_buf *buf, const char *format, ...) GIT_FORMAT_PRINTF(2, 3);
+int git_buf_vprintf(git_buf *buf, const char *format, va_list ap);
+void git_buf_clear(git_buf *buf);
+void git_buf_consume(git_buf *buf, const char *end);
+void git_buf_truncate(git_buf *buf, size_t len);
+void git_buf_shorten(git_buf *buf, size_t amount);
+void git_buf_rtruncate_at_char(git_buf *path, char separator);
+
+/** General join with separator */
+int git_buf_join_n(git_buf *buf, char separator, int nbuf, ...);
+/** Fast join of two strings - first may legally point into `buf` data */
+int git_buf_join(git_buf *buf, char separator, const char *str_a, const char *str_b);
+/** Fast join of three strings - cannot reference `buf` data */
+int git_buf_join3(git_buf *buf, char separator, const char *str_a, const char *str_b, const char *str_c);
+
+/**
+ * Join two strings as paths, inserting a slash between as needed.
+ * @return 0 on success, -1 on failure
+ */
+GIT_INLINE(int) git_buf_joinpath(git_buf *buf, const char *a, const char *b)
+{
+	return git_buf_join(buf, '/', a, b);
+}
+
+GIT_INLINE(const char *) git_buf_cstr(const git_buf *buf)
+{
+	return buf->ptr;
+}
+
+GIT_INLINE(size_t) git_buf_len(const git_buf *buf)
+{
+	return buf->size;
+}
+
+void git_buf_copy_cstr(char *data, size_t datasize, const git_buf *buf);
+
+#define git_buf_PUTS(buf, str) git_buf_put(buf, str, sizeof(str) - 1)
+
+GIT_INLINE(ssize_t) git_buf_rfind_next(const git_buf *buf, char ch)
+{
+	ssize_t idx = (ssize_t)buf->size - 1;
+	while (idx >= 0 && buf->ptr[idx] == ch) idx--;
+	while (idx >= 0 && buf->ptr[idx] != ch) idx--;
+	return idx;
+}
+
+GIT_INLINE(ssize_t) git_buf_rfind(const git_buf *buf, char ch)
+{
+	ssize_t idx = (ssize_t)buf->size - 1;
+	while (idx >= 0 && buf->ptr[idx] != ch) idx--;
+	return idx;
+}
+
+GIT_INLINE(ssize_t) git_buf_find(const git_buf *buf, char ch)
+{
+	void *found = memchr(buf->ptr, ch, buf->size);
+	return found ? (ssize_t)((const char *)found - buf->ptr) : -1;
+}
+
+/* Remove whitespace from the end of the buffer */
+void git_buf_rtrim(git_buf *buf);
+
+int git_buf_cmp(const git_buf *a, const git_buf *b);
+
+/* Quote and unquote a buffer as specified in
+ * http://marc.info/?l=git&m=112927316408690&w=2
+ */
+int git_buf_quote(git_buf *buf);
+int git_buf_unquote(git_buf *buf);
+
+/* Write data as base64 encoded in buffer */
+int git_buf_encode_base64(git_buf *buf, const char *data, size_t len);
+/* Decode the given bas64 and write the result to the buffer */
+int git_buf_decode_base64(git_buf *buf, const char *base64, size_t len);
+
+/* Write data as "base85" encoded in buffer */
+int git_buf_encode_base85(git_buf *buf, const char *data, size_t len);
+/* Decode the given "base85" and write the result to the buffer */
+int git_buf_decode_base85(git_buf *buf, const char *base64, size_t len, size_t output_len);
+
+/* Decode the given percent-encoded string and write the result to the buffer */
+int git_buf_decode_percent(git_buf *buf, const char *str, size_t len);
+
+/*
+ * Insert, remove or replace a portion of the buffer.
+ *
+ * @param buf The buffer to work with
+ *
+ * @param where The location in the buffer where the transformation
+ * should be applied.
+ *
+ * @param nb_to_remove The number of chars to be removed. 0 to not
+ * remove any character in the buffer.
+ *
+ * @param data A pointer to the data which should be inserted.
+ *
+ * @param nb_to_insert The number of chars to be inserted. 0 to not
+ * insert any character from the buffer.
+ *
+ * @return 0 or an error code.
+ */
+int git_buf_splice(
+	git_buf *buf,
+	size_t where,
+	size_t nb_to_remove,
+	const char *data,
+	size_t nb_to_insert);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/cache.c

@@ -0,0 +1,270 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "cache.h"
+
+#include "repository.h"
+#include "commit.h"
+#include "thread-utils.h"
+#include "util.h"
+#include "odb.h"
+#include "object.h"
+#include "git2/oid.h"
+
+bool git_cache__enabled = true;
+ssize_t git_cache__max_storage = (256 * 1024 * 1024);
+git_atomic_ssize git_cache__current_storage = {0};
+
+static size_t git_cache__max_object_size[8] = {
+	0,     /* GIT_OBJECT__EXT1 */
+	4096,  /* GIT_OBJECT_COMMIT */
+	4096,  /* GIT_OBJECT_TREE */
+	0,     /* GIT_OBJECT_BLOB */
+	4096,  /* GIT_OBJECT_TAG */
+	0,     /* GIT_OBJECT__EXT2 */
+	0,     /* GIT_OBJECT_OFS_DELTA */
+	0      /* GIT_OBJECT_REF_DELTA */
+};
+
+int git_cache_set_max_object_size(git_object_t type, size_t size)
+{
+	if (type < 0 || (size_t)type >= ARRAY_SIZE(git_cache__max_object_size)) {
+		git_error_set(GIT_ERROR_INVALID, "type out of range");
+		return -1;
+	}
+
+	git_cache__max_object_size[type] = size;
+	return 0;
+}
+
+void git_cache_dump_stats(git_cache *cache)
+{
+	git_cached_obj *object;
+
+	if (git_cache_size(cache) == 0)
+		return;
+
+	printf("Cache %p: %"PRIuZ" items cached, %"PRIdZ" bytes\n",
+		cache, git_cache_size(cache), cache->used_memory);
+
+	git_oidmap_foreach_value(cache->map, object, {
+		char oid_str[9];
+		printf(" %s%c %s (%"PRIuZ")\n",
+			git_object_type2string(object->type),
+			object->flags == GIT_CACHE_STORE_PARSED ? '*' : ' ',
+			git_oid_tostr(oid_str, sizeof(oid_str), &object->oid),
+			object->size
+		);
+	});
+}
+
+int git_cache_init(git_cache *cache)
+{
+	memset(cache, 0, sizeof(*cache));
+
+	if ((git_oidmap_new(&cache->map)) < 0)
+		return -1;
+
+	if (git_rwlock_init(&cache->lock)) {
+		git_error_set(GIT_ERROR_OS, "failed to initialize cache rwlock");
+		return -1;
+	}
+
+	return 0;
+}
+
+/* called with lock */
+static void clear_cache(git_cache *cache)
+{
+	git_cached_obj *evict = NULL;
+
+	if (git_cache_size(cache) == 0)
+		return;
+
+	git_oidmap_foreach_value(cache->map, evict, {
+		git_cached_obj_decref(evict);
+	});
+
+	git_oidmap_clear(cache->map);
+	git_atomic_ssize_add(&git_cache__current_storage, -cache->used_memory);
+	cache->used_memory = 0;
+}
+
+void git_cache_clear(git_cache *cache)
+{
+	if (git_rwlock_wrlock(&cache->lock) < 0)
+		return;
+
+	clear_cache(cache);
+
+	git_rwlock_wrunlock(&cache->lock);
+}
+
+void git_cache_dispose(git_cache *cache)
+{
+	git_cache_clear(cache);
+	git_oidmap_free(cache->map);
+	git_rwlock_free(&cache->lock);
+	git__memzero(cache, sizeof(*cache));
+}
+
+/* Called with lock */
+static void cache_evict_entries(git_cache *cache)
+{
+	size_t evict_count = git_cache_size(cache) / 2048, i;
+	ssize_t evicted_memory = 0;
+
+	if (evict_count < 8)
+		evict_count = 8;
+
+	/* do not infinite loop if there's not enough entries to evict  */
+	if (evict_count > git_cache_size(cache)) {
+		clear_cache(cache);
+		return;
+	}
+
+	i = 0;
+	while (evict_count > 0) {
+		git_cached_obj *evict;
+		const git_oid *key;
+
+		if (git_oidmap_iterate((void **) &evict, cache->map, &i, &key) == GIT_ITEROVER)
+			break;
+
+		evict_count--;
+		evicted_memory += evict->size;
+		git_oidmap_delete(cache->map, key);
+		git_cached_obj_decref(evict);
+	}
+
+	cache->used_memory -= evicted_memory;
+	git_atomic_ssize_add(&git_cache__current_storage, -evicted_memory);
+}
+
+static bool cache_should_store(git_object_t object_type, size_t object_size)
+{
+	size_t max_size = git_cache__max_object_size[object_type];
+	return git_cache__enabled && object_size < max_size;
+}
+
+static void *cache_get(git_cache *cache, const git_oid *oid, unsigned int flags)
+{
+	git_cached_obj *entry;
+
+	if (!git_cache__enabled || git_rwlock_rdlock(&cache->lock) < 0)
+		return NULL;
+
+	if ((entry = git_oidmap_get(cache->map, oid)) != NULL) {
+		if (flags && entry->flags != flags) {
+			entry = NULL;
+		} else {
+			git_cached_obj_incref(entry);
+		}
+	}
+
+	git_rwlock_rdunlock(&cache->lock);
+
+	return entry;
+}
+
+static void *cache_store(git_cache *cache, git_cached_obj *entry)
+{
+	git_cached_obj *stored_entry;
+
+	git_cached_obj_incref(entry);
+
+	if (!git_cache__enabled && cache->used_memory > 0) {
+		git_cache_clear(cache);
+		return entry;
+	}
+
+	if (!cache_should_store(entry->type, entry->size))
+		return entry;
+
+	if (git_rwlock_wrlock(&cache->lock) < 0)
+		return entry;
+
+	/* soften the load on the cache */
+	if (git_cache__current_storage.val > git_cache__max_storage)
+		cache_evict_entries(cache);
+
+	/* not found */
+	if ((stored_entry = git_oidmap_get(cache->map, &entry->oid)) == NULL) {
+		if (git_oidmap_set(cache->map, &entry->oid, entry) == 0) {
+			git_cached_obj_incref(entry);
+			cache->used_memory += entry->size;
+			git_atomic_ssize_add(&git_cache__current_storage, (ssize_t)entry->size);
+		}
+	}
+	/* found */
+	else {
+		if (stored_entry->flags == entry->flags) {
+			git_cached_obj_decref(entry);
+			git_cached_obj_incref(stored_entry);
+			entry = stored_entry;
+		} else if (stored_entry->flags == GIT_CACHE_STORE_RAW &&
+			   entry->flags == GIT_CACHE_STORE_PARSED) {
+			git_cached_obj_decref(stored_entry);
+			git_cached_obj_incref(entry);
+
+			git_oidmap_set(cache->map, &entry->oid, entry);
+		} else {
+			/* NO OP */
+		}
+	}
+
+	git_rwlock_wrunlock(&cache->lock);
+	return entry;
+}
+
+void *git_cache_store_raw(git_cache *cache, git_odb_object *entry)
+{
+	entry->cached.flags = GIT_CACHE_STORE_RAW;
+	return cache_store(cache, (git_cached_obj *)entry);
+}
+
+void *git_cache_store_parsed(git_cache *cache, git_object *entry)
+{
+	entry->cached.flags = GIT_CACHE_STORE_PARSED;
+	return cache_store(cache, (git_cached_obj *)entry);
+}
+
+git_odb_object *git_cache_get_raw(git_cache *cache, const git_oid *oid)
+{
+	return cache_get(cache, oid, GIT_CACHE_STORE_RAW);
+}
+
+git_object *git_cache_get_parsed(git_cache *cache, const git_oid *oid)
+{
+	return cache_get(cache, oid, GIT_CACHE_STORE_PARSED);
+}
+
+void *git_cache_get_any(git_cache *cache, const git_oid *oid)
+{
+	return cache_get(cache, oid, GIT_CACHE_STORE_ANY);
+}
+
+void git_cached_obj_decref(void *_obj)
+{
+	git_cached_obj *obj = _obj;
+
+	if (git_atomic_dec(&obj->refcount) == 0) {
+		switch (obj->flags) {
+		case GIT_CACHE_STORE_RAW:
+			git_odb_object__free(_obj);
+			break;
+
+		case GIT_CACHE_STORE_PARSED:
+			git_object__free(_obj);
+			break;
+
+		default:
+			git__free(_obj);
+			break;
+		}
+	}
+}

node_modules/nodegit/vendor/libgit2/src/cache.h

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_cache_h__
+#define INCLUDE_cache_h__
+
+#include "common.h"
+
+#include "git2/common.h"
+#include "git2/oid.h"
+#include "git2/odb.h"
+
+#include "thread-utils.h"
+#include "oidmap.h"
+
+enum {
+	GIT_CACHE_STORE_ANY = 0,
+	GIT_CACHE_STORE_RAW = 1,
+	GIT_CACHE_STORE_PARSED = 2
+};
+
+typedef struct {
+	git_oid    oid;
+	int16_t    type;  /* git_object_t value */
+	uint16_t   flags; /* GIT_CACHE_STORE value */
+	size_t     size;
+	git_atomic refcount;
+} git_cached_obj;
+
+typedef struct {
+	git_oidmap *map;
+	git_rwlock  lock;
+	ssize_t     used_memory;
+} git_cache;
+
+extern bool git_cache__enabled;
+extern ssize_t git_cache__max_storage;
+extern git_atomic_ssize git_cache__current_storage;
+
+int git_cache_set_max_object_size(git_object_t type, size_t size);
+
+int git_cache_init(git_cache *cache);
+void git_cache_dispose(git_cache *cache);
+void git_cache_clear(git_cache *cache);
+
+void *git_cache_store_raw(git_cache *cache, git_odb_object *entry);
+void *git_cache_store_parsed(git_cache *cache, git_object *entry);
+
+git_odb_object *git_cache_get_raw(git_cache *cache, const git_oid *oid);
+git_object *git_cache_get_parsed(git_cache *cache, const git_oid *oid);
+void *git_cache_get_any(git_cache *cache, const git_oid *oid);
+
+GIT_INLINE(size_t) git_cache_size(git_cache *cache)
+{
+	return (size_t)git_oidmap_size(cache->map);
+}
+
+GIT_INLINE(void) git_cached_obj_incref(void *_obj)
+{
+	git_cached_obj *obj = _obj;
+	git_atomic_inc(&obj->refcount);
+}
+
+void git_cached_obj_decref(void *_obj);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/cc-compat.h

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_cc_compat_h__
+#define INCLUDE_cc_compat_h__
+
+#include <stdarg.h>
+
+/*
+ * See if our compiler is known to support flexible array members.
+ */
+#ifndef GIT_FLEX_ARRAY
+#	if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+#		define GIT_FLEX_ARRAY /* empty */
+#	elif defined(__GNUC__)
+#		if (__GNUC__ >= 3)
+#			define GIT_FLEX_ARRAY /* empty */
+#		else
+#			define GIT_FLEX_ARRAY 0 /* older GNU extension */
+#		endif
+#	endif
+
+/* Default to safer but a bit wasteful traditional style */
+#	ifndef GIT_FLEX_ARRAY
+#		define GIT_FLEX_ARRAY 1
+#	endif
+#endif
+
+#ifdef __GNUC__
+#	define GIT_TYPEOF(x) (__typeof__(x))
+#else
+#	define GIT_TYPEOF(x)
+#endif
+
+#if defined(__GNUC__)
+#	define GIT_ALIGN(x,size) x __attribute__ ((aligned(size)))
+#elif defined(_MSC_VER)
+#	define GIT_ALIGN(x,size) __declspec(align(size)) x
+#else
+#	define GIT_ALIGN(x,size) x
+#endif
+
+#define GIT_UNUSED(x) ((void)(x))
+
+/* Define the printf format specifer to use for size_t output */
+#if defined(_MSC_VER) || defined(__MINGW32__)
+
+/* Visual Studio 2012 and prior lack PRId64 entirely */
+#	ifndef PRId64
+#		define PRId64 "I64d"
+#	endif
+
+/* The first block is needed to avoid warnings on MingW amd64 */
+#	if (SIZE_MAX == ULLONG_MAX)
+#		define PRIuZ "I64u"
+#		define PRIxZ "I64x"
+#		define PRIXZ "I64X"
+#		define PRIdZ "I64d"
+#	else
+#		define PRIuZ "Iu"
+#		define PRIxZ "Ix"
+#		define PRIXZ "IX"
+#		define PRIdZ "Id"
+#	endif
+
+#else
+#	define PRIuZ "zu"
+#	define PRIxZ "zx"
+#	define PRIXZ "zX"
+#	define PRIdZ "zd"
+#endif
+
+/* Micosoft Visual C/C++ */
+#if defined(_MSC_VER)
+/* disable "deprecated function" warnings */
+#	pragma warning ( disable : 4996 )
+/* disable "conditional expression is constant" level 4 warnings */
+#	pragma warning ( disable : 4127 )
+#endif
+
+#if defined (_MSC_VER)
+	typedef unsigned char bool;
+#	ifndef true
+#		define true 1
+#	endif
+#	ifndef false
+#		define false 0
+#	endif
+#else
+#	include <stdbool.h>
+#endif
+
+#ifndef va_copy
+#	ifdef __va_copy
+#		define va_copy(dst, src) __va_copy(dst, src)
+#	else
+#		define va_copy(dst, src) ((dst) = (src))
+#	endif
+#endif
+
+#endif

node_modules/nodegit/vendor/libgit2/src/checkout.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_checkout_h__
+#define INCLUDE_checkout_h__
+
+#include "common.h"
+
+#include "git2/checkout.h"
+#include "iterator.h"
+
+#define GIT_CHECKOUT__NOTIFY_CONFLICT_TREE (1u << 12)
+
+/**
+ * Update the working directory to match the target iterator.  The
+ * expected baseline value can be passed in via the checkout options
+ * or else will default to the HEAD commit.
+ */
+extern int git_checkout_iterator(
+	git_iterator *target,
+	git_index *index,
+	const git_checkout_options *opts);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/cherrypick.c

@@ -0,0 +1,236 @@
+/*
+* Copyright (C) the libgit2 contributors. All rights reserved.
+*
+* This file is part of libgit2, distributed under the GNU GPL v2 with
+* a Linking Exception. For full terms see the included COPYING file.
+*/
+
+#include "common.h"
+
+#include "repository.h"
+#include "filebuf.h"
+#include "merge.h"
+#include "vector.h"
+#include "index.h"
+
+#include "git2/types.h"
+#include "git2/merge.h"
+#include "git2/cherrypick.h"
+#include "git2/commit.h"
+#include "git2/sys/commit.h"
+
+#define GIT_CHERRYPICK_FILE_MODE		0666
+
+static int write_cherrypick_head(
+	git_repository *repo,
+	const char *commit_oidstr)
+{
+	git_filebuf file = GIT_FILEBUF_INIT;
+	git_buf file_path = GIT_BUF_INIT;
+	int error = 0;
+
+	if ((error = git_buf_joinpath(&file_path, repo->gitdir, GIT_CHERRYPICK_HEAD_FILE)) >= 0 &&
+		(error = git_filebuf_open(&file, file_path.ptr, GIT_FILEBUF_CREATE_LEADING_DIRS, GIT_CHERRYPICK_FILE_MODE)) >= 0 &&
+		(error = git_filebuf_printf(&file, "%s\n", commit_oidstr)) >= 0)
+		error = git_filebuf_commit(&file);
+
+	if (error < 0)
+		git_filebuf_cleanup(&file);
+
+	git_buf_dispose(&file_path);
+
+	return error;
+}
+
+static int write_merge_msg(
+	git_repository *repo,
+	const char *commit_msg)
+{
+	git_filebuf file = GIT_FILEBUF_INIT;
+	git_buf file_path = GIT_BUF_INIT;
+	int error = 0;
+
+	if ((error = git_buf_joinpath(&file_path, repo->gitdir, GIT_MERGE_MSG_FILE)) < 0 ||
+		(error = git_filebuf_open(&file, file_path.ptr, GIT_FILEBUF_CREATE_LEADING_DIRS, GIT_CHERRYPICK_FILE_MODE)) < 0 ||
+		(error = git_filebuf_printf(&file, "%s", commit_msg)) < 0)
+		goto cleanup;
+
+	error = git_filebuf_commit(&file);
+
+cleanup:
+	if (error < 0)
+		git_filebuf_cleanup(&file);
+
+	git_buf_dispose(&file_path);
+
+	return error;
+}
+
+static int cherrypick_normalize_opts(
+	git_repository *repo,
+	git_cherrypick_options *opts,
+	const git_cherrypick_options *given,
+	const char *their_label)
+{
+	int error = 0;
+	unsigned int default_checkout_strategy = GIT_CHECKOUT_SAFE |
+		GIT_CHECKOUT_ALLOW_CONFLICTS;
+
+	GIT_UNUSED(repo);
+
+	if (given != NULL)
+		memcpy(opts, given, sizeof(git_cherrypick_options));
+	else {
+		git_cherrypick_options default_opts = GIT_CHERRYPICK_OPTIONS_INIT;
+		memcpy(opts, &default_opts, sizeof(git_cherrypick_options));
+	}
+
+	if (!opts->checkout_opts.checkout_strategy)
+		opts->checkout_opts.checkout_strategy = default_checkout_strategy;
+
+	if (!opts->checkout_opts.our_label)
+		opts->checkout_opts.our_label = "HEAD";
+
+	if (!opts->checkout_opts.their_label)
+		opts->checkout_opts.their_label = their_label;
+
+	return error;
+}
+
+static int cherrypick_state_cleanup(git_repository *repo)
+{
+	const char *state_files[] = { GIT_CHERRYPICK_HEAD_FILE, GIT_MERGE_MSG_FILE };
+
+	return git_repository__cleanup_files(repo, state_files, ARRAY_SIZE(state_files));
+}
+
+static int cherrypick_seterr(git_commit *commit, const char *fmt)
+{
+	char commit_oidstr[GIT_OID_HEXSZ + 1];
+
+	git_error_set(GIT_ERROR_CHERRYPICK, fmt,
+		git_oid_tostr(commit_oidstr, GIT_OID_HEXSZ + 1, git_commit_id(commit)));
+
+	return -1;
+}
+
+int git_cherrypick_commit(
+	git_index **out,
+	git_repository *repo,
+	git_commit *cherrypick_commit,
+	git_commit *our_commit,
+	unsigned int mainline,
+	const git_merge_options *merge_opts)
+{
+	git_commit *parent_commit = NULL;
+	git_tree *parent_tree = NULL, *our_tree = NULL, *cherrypick_tree = NULL;
+	int parent = 0, error = 0;
+
+	assert(out && repo && cherrypick_commit && our_commit);
+
+	if (git_commit_parentcount(cherrypick_commit) > 1) {
+		if (!mainline)
+			return cherrypick_seterr(cherrypick_commit,
+				"mainline branch is not specified but %s is a merge commit");
+
+		parent = mainline;
+	} else {
+		if (mainline)
+			return cherrypick_seterr(cherrypick_commit,
+				"mainline branch specified but %s is not a merge commit");
+
+		parent = git_commit_parentcount(cherrypick_commit);
+	}
+
+	if (parent &&
+		((error = git_commit_parent(&parent_commit, cherrypick_commit, (parent - 1))) < 0 ||
+		(error = git_commit_tree(&parent_tree, parent_commit)) < 0))
+		goto done;
+
+	if ((error = git_commit_tree(&cherrypick_tree, cherrypick_commit)) < 0 ||
+		(error = git_commit_tree(&our_tree, our_commit)) < 0)
+		goto done;
+
+	error = git_merge_trees(out, repo, parent_tree, our_tree, cherrypick_tree, merge_opts);
+
+done:
+	git_tree_free(parent_tree);
+	git_tree_free(our_tree);
+	git_tree_free(cherrypick_tree);
+	git_commit_free(parent_commit);
+
+	return error;
+}
+
+int git_cherrypick(
+	git_repository *repo,
+	git_commit *commit,
+	const git_cherrypick_options *given_opts)
+{
+	git_cherrypick_options opts;
+	git_reference *our_ref = NULL;
+	git_commit *our_commit = NULL;
+	char commit_oidstr[GIT_OID_HEXSZ + 1];
+	const char *commit_msg, *commit_summary;
+	git_buf their_label = GIT_BUF_INIT;
+	git_index *index = NULL;
+	git_indexwriter indexwriter = GIT_INDEXWRITER_INIT;
+	int error = 0;
+
+	assert(repo && commit);
+
+	GIT_ERROR_CHECK_VERSION(given_opts, GIT_CHERRYPICK_OPTIONS_VERSION, "git_cherrypick_options");
+
+	if ((error = git_repository__ensure_not_bare(repo, "cherry-pick")) < 0)
+		return error;
+
+	if ((commit_msg = git_commit_message(commit)) == NULL ||
+		(commit_summary = git_commit_summary(commit)) == NULL) {
+		error = -1;
+		goto on_error;
+	}
+
+	git_oid_nfmt(commit_oidstr, sizeof(commit_oidstr), git_commit_id(commit));
+
+	if ((error = write_merge_msg(repo, commit_msg)) < 0 ||
+		(error = git_buf_printf(&their_label, "%.7s... %s", commit_oidstr, commit_summary)) < 0 ||
+		(error = cherrypick_normalize_opts(repo, &opts, given_opts, git_buf_cstr(&their_label))) < 0 ||
+		(error = git_indexwriter_init_for_operation(&indexwriter, repo, &opts.checkout_opts.checkout_strategy)) < 0 ||
+		(error = write_cherrypick_head(repo, commit_oidstr)) < 0 ||
+		(error = git_repository_head(&our_ref, repo)) < 0 ||
+		(error = git_reference_peel((git_object **)&our_commit, our_ref, GIT_OBJECT_COMMIT)) < 0 ||
+		(error = git_cherrypick_commit(&index, repo, commit, our_commit, opts.mainline, &opts.merge_opts)) < 0 ||
+		(error = git_merge__check_result(repo, index)) < 0 ||
+		(error = git_merge__append_conflicts_to_merge_msg(repo, index)) < 0 ||
+		(error = git_checkout_index(repo, index, &opts.checkout_opts)) < 0 ||
+		(error = git_indexwriter_commit(&indexwriter)) < 0)
+		goto on_error;
+
+	goto done;
+
+on_error:
+	cherrypick_state_cleanup(repo);
+
+done:
+	git_indexwriter_cleanup(&indexwriter);
+	git_index_free(index);
+	git_commit_free(our_commit);
+	git_reference_free(our_ref);
+	git_buf_dispose(&their_label);
+
+	return error;
+}
+
+int git_cherrypick_options_init(
+	git_cherrypick_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_cherrypick_options, GIT_CHERRYPICK_OPTIONS_INIT);
+	return 0;
+}
+
+int git_cherrypick_init_options(
+	git_cherrypick_options *opts, unsigned int version)
+{
+	return git_cherrypick_options_init(opts, version);
+}

node_modules/nodegit/vendor/libgit2/src/clone.c

@@ -0,0 +1,580 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "clone.h"
+
+#include "git2/clone.h"
+#include "git2/remote.h"
+#include "git2/revparse.h"
+#include "git2/branch.h"
+#include "git2/config.h"
+#include "git2/checkout.h"
+#include "git2/commit.h"
+#include "git2/tree.h"
+
+#include "remote.h"
+#include "futils.h"
+#include "refs.h"
+#include "path.h"
+#include "repository.h"
+#include "odb.h"
+
+static int clone_local_into(git_repository *repo, git_remote *remote, const git_fetch_options *fetch_opts, const git_checkout_options *co_opts, const char *branch, int link);
+
+static int create_branch(
+	git_reference **branch,
+	git_repository *repo,
+	const git_oid *target,
+	const char *name,
+	const char *log_message)
+{
+	git_commit *head_obj = NULL;
+	git_reference *branch_ref = NULL;
+	git_buf refname = GIT_BUF_INIT;
+	int error;
+
+	/* Find the target commit */
+	if ((error = git_commit_lookup(&head_obj, repo, target)) < 0)
+		return error;
+
+	/* Create the new branch */
+	if ((error = git_buf_printf(&refname, GIT_REFS_HEADS_DIR "%s", name)) < 0)
+		return error;
+
+	error = git_reference_create(&branch_ref, repo, git_buf_cstr(&refname), target, 0, log_message);
+	git_buf_dispose(&refname);
+	git_commit_free(head_obj);
+
+	if (!error)
+		*branch = branch_ref;
+	else
+		git_reference_free(branch_ref);
+
+	return error;
+}
+
+static int setup_tracking_config(
+	git_repository *repo,
+	const char *branch_name,
+	const char *remote_name,
+	const char *merge_target)
+{
+	git_config *cfg;
+	git_buf remote_key = GIT_BUF_INIT, merge_key = GIT_BUF_INIT;
+	int error = -1;
+
+	if (git_repository_config__weakptr(&cfg, repo) < 0)
+		return -1;
+
+	if (git_buf_printf(&remote_key, "branch.%s.remote", branch_name) < 0)
+		goto cleanup;
+
+	if (git_buf_printf(&merge_key, "branch.%s.merge", branch_name) < 0)
+		goto cleanup;
+
+	if (git_config_set_string(cfg, git_buf_cstr(&remote_key), remote_name) < 0)
+		goto cleanup;
+
+	if (git_config_set_string(cfg, git_buf_cstr(&merge_key), merge_target) < 0)
+		goto cleanup;
+
+	error = 0;
+
+cleanup:
+	git_buf_dispose(&remote_key);
+	git_buf_dispose(&merge_key);
+	return error;
+}
+
+static int create_tracking_branch(
+	git_reference **branch,
+	git_repository *repo,
+	const git_oid *target,
+	const char *branch_name,
+	const char *log_message)
+{
+	int error;
+
+	if ((error = create_branch(branch, repo, target, branch_name, log_message)) < 0)
+		return error;
+
+	return setup_tracking_config(
+		repo,
+		branch_name,
+		GIT_REMOTE_ORIGIN,
+		git_reference_name(*branch));
+}
+
+static int update_head_to_new_branch(
+	git_repository *repo,
+	const git_oid *target,
+	const char *name,
+	const char *reflog_message)
+{
+	git_reference *tracking_branch = NULL;
+	int error;
+
+	if (!git__prefixcmp(name, GIT_REFS_HEADS_DIR))
+		name += strlen(GIT_REFS_HEADS_DIR);
+
+	error = create_tracking_branch(&tracking_branch, repo, target, name,
+			reflog_message);
+
+	if (!error)
+		error = git_repository_set_head(
+			repo, git_reference_name(tracking_branch));
+
+	git_reference_free(tracking_branch);
+
+	/* if it already existed, then the user's refspec created it for us, ignore it' */
+	if (error == GIT_EEXISTS)
+		error = 0;
+
+	return error;
+}
+
+static int update_head_to_remote(
+		git_repository *repo,
+		git_remote *remote,
+		const char *reflog_message)
+{
+	int error = 0;
+	size_t refs_len;
+	git_refspec *refspec;
+	const git_remote_head *remote_head, **refs;
+	const git_oid *remote_head_id;
+	git_buf remote_master_name = GIT_BUF_INIT;
+	git_buf branch = GIT_BUF_INIT;
+
+	if ((error = git_remote_ls(&refs, &refs_len, remote)) < 0)
+		return error;
+
+	/* We cloned an empty repository or one with an unborn HEAD */
+	if (refs_len == 0 || strcmp(refs[0]->name, GIT_HEAD_FILE))
+		return setup_tracking_config(
+			repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE);
+
+	/* We know we have HEAD, let's see where it points */
+	remote_head = refs[0];
+	assert(remote_head);
+
+	remote_head_id = &remote_head->oid;
+
+	error = git_remote_default_branch(&branch, remote);
+	if (error == GIT_ENOTFOUND) {
+		error = git_repository_set_head_detached(
+			repo, remote_head_id);
+		goto cleanup;
+	}
+
+	refspec = git_remote__matching_refspec(remote, git_buf_cstr(&branch));
+
+	if (refspec == NULL) {
+		git_error_set(GIT_ERROR_NET, "the remote's default branch does not fit the refspec configuration");
+		error = GIT_EINVALIDSPEC;
+		goto cleanup;
+	}
+
+	/* Determine the remote tracking reference name from the local master */
+	if ((error = git_refspec_transform(
+		&remote_master_name,
+		refspec,
+		git_buf_cstr(&branch))) < 0)
+		goto cleanup;
+
+	error = update_head_to_new_branch(
+		repo,
+		remote_head_id,
+		git_buf_cstr(&branch),
+		reflog_message);
+
+cleanup:
+	git_buf_dispose(&remote_master_name);
+	git_buf_dispose(&branch);
+
+	return error;
+}
+
+static int update_head_to_branch(
+		git_repository *repo,
+		const char *remote_name,
+		const char *branch,
+		const char *reflog_message)
+{
+	int retcode;
+	git_buf remote_branch_name = GIT_BUF_INIT;
+	git_reference* remote_ref = NULL;
+
+	assert(remote_name && branch);
+
+	if ((retcode = git_buf_printf(&remote_branch_name, GIT_REFS_REMOTES_DIR "%s/%s",
+		remote_name, branch)) < 0 )
+		goto cleanup;
+
+	if ((retcode = git_reference_lookup(&remote_ref, repo, git_buf_cstr(&remote_branch_name))) < 0)
+		goto cleanup;
+
+	retcode = update_head_to_new_branch(repo, git_reference_target(remote_ref), branch,
+			reflog_message);
+
+cleanup:
+	git_reference_free(remote_ref);
+	git_buf_dispose(&remote_branch_name);
+	return retcode;
+}
+
+static int default_repository_create(git_repository **out, const char *path, int bare, void *payload)
+{
+	GIT_UNUSED(payload);
+
+	return git_repository_init(out, path, bare);
+}
+
+static int default_remote_create(
+		git_remote **out,
+		git_repository *repo,
+		const char *name,
+		const char *url,
+		void *payload)
+{
+	GIT_UNUSED(payload);
+
+	return git_remote_create(out, repo, name, url);
+}
+
+/*
+ * submodules?
+ */
+
+static int create_and_configure_origin(
+		git_remote **out,
+		git_repository *repo,
+		const char *url,
+		const git_clone_options *options)
+{
+	int error;
+	git_remote *origin = NULL;
+	char buf[GIT_PATH_MAX];
+	git_remote_create_cb remote_create = options->remote_cb;
+	void *payload = options->remote_cb_payload;
+
+	/* If the path exists and is a dir, the url should be the absolute path */
+	if (git_path_root(url) < 0 && git_path_exists(url) && git_path_isdir(url)) {
+		if (p_realpath(url, buf) == NULL)
+			return -1;
+
+		url = buf;
+	}
+
+	if (!remote_create) {
+		remote_create = default_remote_create;
+		payload = NULL;
+	}
+
+	if ((error = remote_create(&origin, repo, "origin", url, payload)) < 0)
+		goto on_error;
+
+	*out = origin;
+	return 0;
+
+on_error:
+	git_remote_free(origin);
+	return error;
+}
+
+static bool should_checkout(
+	git_repository *repo,
+	bool is_bare,
+	const git_checkout_options *opts)
+{
+	if (is_bare)
+		return false;
+
+	if (!opts)
+		return false;
+
+	if (opts->checkout_strategy == GIT_CHECKOUT_NONE)
+		return false;
+
+	return !git_repository_head_unborn(repo);
+}
+
+static int checkout_branch(git_repository *repo, git_remote *remote, const git_checkout_options *co_opts, const char *branch, const char *reflog_message)
+{
+	int error;
+
+	if (branch)
+		error = update_head_to_branch(repo, git_remote_name(remote), branch,
+				reflog_message);
+	/* Point HEAD to the same ref as the remote's head */
+	else
+		error = update_head_to_remote(repo, remote, reflog_message);
+
+	if (!error && should_checkout(repo, git_repository_is_bare(repo), co_opts))
+		error = git_checkout_head(repo, co_opts);
+
+	return error;
+}
+
+static int clone_into(git_repository *repo, git_remote *_remote, const git_fetch_options *opts, const git_checkout_options *co_opts, const char *branch)
+{
+	int error;
+	git_buf reflog_message = GIT_BUF_INIT;
+	git_fetch_options fetch_opts;
+	git_remote *remote;
+
+	assert(repo && _remote);
+
+	if (!git_repository_is_empty(repo)) {
+		git_error_set(GIT_ERROR_INVALID, "the repository is not empty");
+		return -1;
+	}
+
+	if ((error = git_remote_dup(&remote, _remote)) < 0)
+		return error;
+
+	memcpy(&fetch_opts, opts, sizeof(git_fetch_options));
+	fetch_opts.update_fetchhead = 0;
+	fetch_opts.download_tags = GIT_REMOTE_DOWNLOAD_TAGS_ALL;
+	git_buf_printf(&reflog_message, "clone: from %s", git_remote_url(remote));
+
+	if ((error = git_remote_fetch(remote, NULL, &fetch_opts, git_buf_cstr(&reflog_message))) != 0)
+		goto cleanup;
+
+	error = checkout_branch(repo, remote, co_opts, branch, git_buf_cstr(&reflog_message));
+
+cleanup:
+	git_remote_free(remote);
+	git_buf_dispose(&reflog_message);
+
+	return error;
+}
+
+int git_clone__should_clone_local(const char *url_or_path, git_clone_local_t local)
+{
+	git_buf fromurl = GIT_BUF_INIT;
+	const char *path = url_or_path;
+	bool is_url, is_local;
+
+	if (local == GIT_CLONE_NO_LOCAL)
+		return 0;
+
+	if ((is_url = git_path_is_local_file_url(url_or_path)) != 0) {
+		if (git_path_fromurl(&fromurl, url_or_path) < 0) {
+			is_local = -1;
+			goto done;
+		}
+
+		path = fromurl.ptr;
+	}
+
+	is_local = (!is_url || local != GIT_CLONE_LOCAL_AUTO) &&
+		git_path_isdir(path);
+
+done:
+	git_buf_dispose(&fromurl);
+	return is_local;
+}
+
+static int git__clone(
+	git_repository **out,
+	const char *url,
+	const char *local_path,
+	const git_clone_options *_options,
+	int use_existing)
+{
+	int error = 0;
+	git_repository *repo = NULL;
+	git_remote *origin;
+	git_clone_options options = GIT_CLONE_OPTIONS_INIT;
+	uint32_t rmdir_flags = GIT_RMDIR_REMOVE_FILES;
+	git_repository_create_cb repository_cb;
+
+	assert(out && url && local_path);
+
+	if (_options)
+		memcpy(&options, _options, sizeof(git_clone_options));
+
+	GIT_ERROR_CHECK_VERSION(&options, GIT_CLONE_OPTIONS_VERSION, "git_clone_options");
+
+	/* Only clone to a new directory or an empty directory */
+	if (git_path_exists(local_path) && !use_existing && !git_path_is_empty_dir(local_path)) {
+		git_error_set(GIT_ERROR_INVALID,
+			"'%s' exists and is not an empty directory", local_path);
+		return GIT_EEXISTS;
+	}
+
+	/* Only remove the root directory on failure if we create it */
+	if (git_path_exists(local_path))
+		rmdir_flags |= GIT_RMDIR_SKIP_ROOT;
+
+	if (options.repository_cb)
+		repository_cb = options.repository_cb;
+	else
+		repository_cb = default_repository_create;
+
+	if ((error = repository_cb(&repo, local_path, options.bare, options.repository_cb_payload)) < 0)
+		return error;
+
+	if (!(error = create_and_configure_origin(&origin, repo, url, &options))) {
+		int clone_local = git_clone__should_clone_local(url, options.local);
+		int link = options.local != GIT_CLONE_LOCAL_NO_LINKS;
+
+		if (clone_local == 1)
+			error = clone_local_into(
+				repo, origin, &options.fetch_opts, &options.checkout_opts,
+				options.checkout_branch, link);
+		else if (clone_local == 0)
+			error = clone_into(
+				repo, origin, &options.fetch_opts, &options.checkout_opts,
+				options.checkout_branch);
+		else
+			error = -1;
+
+		git_remote_free(origin);
+	}
+
+	if (error != 0) {
+		git_error_state last_error = {0};
+		git_error_state_capture(&last_error, error);
+
+		git_repository_free(repo);
+		repo = NULL;
+
+		(void)git_futils_rmdir_r(local_path, NULL, rmdir_flags);
+
+		git_error_state_restore(&last_error);
+	}
+
+	*out = repo;
+	return error;
+}
+
+int git_clone(
+	git_repository **out,
+	const char *url,
+	const char *local_path,
+	const git_clone_options *_options)
+{
+	return git__clone(out, url, local_path, _options, 0);
+}
+
+int git_clone__submodule(
+	git_repository **out,
+	const char *url,
+	const char *local_path,
+	const git_clone_options *_options)
+{
+	return git__clone(out, url, local_path, _options, 1);
+}
+
+int git_clone_options_init(git_clone_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_clone_options, GIT_CLONE_OPTIONS_INIT);
+	return 0;
+}
+
+int git_clone_init_options(git_clone_options *opts, unsigned int version)
+{
+	return git_clone_options_init(opts, version);
+}
+
+static bool can_link(const char *src, const char *dst, int link)
+{
+#ifdef GIT_WIN32
+	GIT_UNUSED(src);
+	GIT_UNUSED(dst);
+	GIT_UNUSED(link);
+	return false;
+#else
+
+	struct stat st_src, st_dst;
+
+	if (!link)
+		return false;
+
+	if (p_stat(src, &st_src) < 0)
+		return false;
+
+	if (p_stat(dst, &st_dst) < 0)
+		return false;
+
+	return st_src.st_dev == st_dst.st_dev;
+#endif
+}
+
+static int clone_local_into(git_repository *repo, git_remote *remote, const git_fetch_options *fetch_opts, const git_checkout_options *co_opts, const char *branch, int link)
+{
+	int error, flags;
+	git_repository *src;
+	git_buf src_odb = GIT_BUF_INIT, dst_odb = GIT_BUF_INIT, src_path = GIT_BUF_INIT;
+	git_buf reflog_message = GIT_BUF_INIT;
+
+	assert(repo && remote);
+
+	if (!git_repository_is_empty(repo)) {
+		git_error_set(GIT_ERROR_INVALID, "the repository is not empty");
+		return -1;
+	}
+
+	/*
+	 * Let's figure out what path we should use for the source
+	 * repo, if it's not rooted, the path should be relative to
+	 * the repository's worktree/gitdir.
+	 */
+	if ((error = git_path_from_url_or_path(&src_path, git_remote_url(remote))) < 0)
+		return error;
+
+	/* Copy .git/objects/ from the source to the target */
+	if ((error = git_repository_open(&src, git_buf_cstr(&src_path))) < 0) {
+		git_buf_dispose(&src_path);
+		return error;
+	}
+
+	if (git_repository_item_path(&src_odb, src, GIT_REPOSITORY_ITEM_OBJECTS) < 0
+		|| git_repository_item_path(&dst_odb, repo, GIT_REPOSITORY_ITEM_OBJECTS) < 0) {
+		error = -1;
+		goto cleanup;
+	}
+
+	flags = 0;
+	if (can_link(git_repository_path(src), git_repository_path(repo), link))
+		flags |= GIT_CPDIR_LINK_FILES;
+
+	error = git_futils_cp_r(git_buf_cstr(&src_odb), git_buf_cstr(&dst_odb),
+				flags, GIT_OBJECT_DIR_MODE);
+
+	/*
+	 * can_link() doesn't catch all variations, so if we hit an
+	 * error and did want to link, let's try again without trying
+	 * to link.
+	 */
+	if (error < 0 && link) {
+		flags &= ~GIT_CPDIR_LINK_FILES;
+		error = git_futils_cp_r(git_buf_cstr(&src_odb), git_buf_cstr(&dst_odb),
+					flags, GIT_OBJECT_DIR_MODE);
+	}
+
+	if (error < 0)
+		goto cleanup;
+
+	git_buf_printf(&reflog_message, "clone: from %s", git_remote_url(remote));
+
+	if ((error = git_remote_fetch(remote, NULL, fetch_opts, git_buf_cstr(&reflog_message))) != 0)
+		goto cleanup;
+
+	error = checkout_branch(repo, remote, co_opts, branch, git_buf_cstr(&reflog_message));
+
+cleanup:
+	git_buf_dispose(&reflog_message);
+	git_buf_dispose(&src_path);
+	git_buf_dispose(&src_odb);
+	git_buf_dispose(&dst_odb);
+	git_repository_free(src);
+	return error;
+}

node_modules/nodegit/vendor/libgit2/src/clone.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_clone_h__
+#define INCLUDE_clone_h__
+
+#include "common.h"
+
+#include "git2/clone.h"
+
+extern int git_clone__submodule(git_repository **out,
+	const char *url, const char *local_path,
+	const git_clone_options *_options);
+
+extern int git_clone__should_clone_local(const char *url, git_clone_local_t local);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/commit.c

@@ -0,0 +1,959 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "commit.h"
+
+#include "git2/common.h"
+#include "git2/object.h"
+#include "git2/repository.h"
+#include "git2/signature.h"
+#include "git2/mailmap.h"
+#include "git2/sys/commit.h"
+
+#include "odb.h"
+#include "commit.h"
+#include "signature.h"
+#include "message.h"
+#include "refs.h"
+#include "object.h"
+#include "array.h"
+#include "oidarray.h"
+
+void git_commit__free(void *_commit)
+{
+	git_commit *commit = _commit;
+
+	git_array_clear(commit->parent_ids);
+
+	git_signature_free(commit->author);
+	git_signature_free(commit->committer);
+
+	git__free(commit->raw_header);
+	git__free(commit->raw_message);
+	git__free(commit->message_encoding);
+	git__free(commit->summary);
+	git__free(commit->body);
+
+	git__free(commit);
+}
+
+static int git_commit__create_buffer_internal(
+	git_buf *out,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_oid *tree,
+	git_array_oid_t *parents)
+{
+	size_t i = 0;
+	const git_oid *parent;
+
+	assert(out && tree);
+
+	git_oid__writebuf(out, "tree ", tree);
+
+	for (i = 0; i < git_array_size(*parents); i++) {
+		parent = git_array_get(*parents, i);
+		git_oid__writebuf(out, "parent ", parent);
+	}
+
+	git_signature__writebuf(out, "author ", author);
+	git_signature__writebuf(out, "committer ", committer);
+
+	if (message_encoding != NULL)
+		git_buf_printf(out, "encoding %s\n", message_encoding);
+
+	git_buf_putc(out, '\n');
+
+	if (git_buf_puts(out, message) < 0)
+		goto on_error;
+
+	return 0;
+
+on_error:
+	git_buf_dispose(out);
+	return -1;
+}
+
+static int validate_tree_and_parents(git_array_oid_t *parents, git_repository *repo, const git_oid *tree,
+	git_commit_parent_callback parent_cb, void *parent_payload,
+	const git_oid *current_id, bool validate)
+{
+	size_t i;
+	int error;
+	git_oid *parent_cpy;
+	const git_oid *parent;
+
+	if (validate && !git_object__is_valid(repo, tree, GIT_OBJECT_TREE))
+		return -1;
+
+	i = 0;
+	while ((parent = parent_cb(i, parent_payload)) != NULL) {
+		if (validate && !git_object__is_valid(repo, parent, GIT_OBJECT_COMMIT)) {
+			error = -1;
+			goto on_error;
+		}
+
+		parent_cpy = git_array_alloc(*parents);
+		GIT_ERROR_CHECK_ALLOC(parent_cpy);
+
+		git_oid_cpy(parent_cpy, parent);
+		i++;
+	}
+
+	if (current_id && (parents->size == 0 || git_oid_cmp(current_id, git_array_get(*parents, 0)))) {
+		git_error_set(GIT_ERROR_OBJECT, "failed to create commit: current tip is not the first parent");
+		error = GIT_EMODIFIED;
+		goto on_error;
+	}
+
+	return 0;
+
+on_error:
+	git_array_clear(*parents);
+	return error;
+}
+
+static int git_commit__create_internal(
+	git_oid *id,
+	git_repository *repo,
+	const char *update_ref,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_oid *tree,
+	git_commit_parent_callback parent_cb,
+	void *parent_payload,
+	bool validate)
+{
+	int error;
+	git_odb *odb;
+	git_reference *ref = NULL;
+	git_buf buf = GIT_BUF_INIT;
+	const git_oid *current_id = NULL;
+	git_array_oid_t parents = GIT_ARRAY_INIT;
+
+	if (update_ref) {
+		error = git_reference_lookup_resolved(&ref, repo, update_ref, 10);
+		if (error < 0 && error != GIT_ENOTFOUND)
+			return error;
+	}
+	git_error_clear();
+
+	if (ref)
+		current_id = git_reference_target(ref);
+
+	if ((error = validate_tree_and_parents(&parents, repo, tree, parent_cb, parent_payload, current_id, validate)) < 0)
+		goto cleanup;
+
+	error = git_commit__create_buffer_internal(&buf, author, committer,
+		message_encoding, message, tree,
+		&parents);
+
+	if (error < 0)
+		goto cleanup;
+
+	if (git_repository_odb__weakptr(&odb, repo) < 0)
+		goto cleanup;
+
+	if (git_odb__freshen(odb, tree) < 0)
+		goto cleanup;
+
+	if (git_odb_write(id, odb, buf.ptr, buf.size, GIT_OBJECT_COMMIT) < 0)
+		goto cleanup;
+
+
+	if (update_ref != NULL) {
+		error = git_reference__update_for_commit(
+			repo, ref, update_ref, id, "commit");
+		goto cleanup;
+	}
+
+cleanup:
+	git_array_clear(parents);
+	git_reference_free(ref);
+	git_buf_dispose(&buf);
+	return error;
+}
+
+int git_commit_create_from_callback(
+	git_oid *id,
+	git_repository *repo,
+	const char *update_ref,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_oid *tree,
+	git_commit_parent_callback parent_cb,
+	void *parent_payload)
+{
+	return git_commit__create_internal(
+		id, repo, update_ref, author, committer, message_encoding, message,
+		tree, parent_cb, parent_payload, true);
+}
+
+typedef struct {
+	size_t total;
+	va_list args;
+} commit_parent_varargs;
+
+static const git_oid *commit_parent_from_varargs(size_t curr, void *payload)
+{
+	commit_parent_varargs *data = payload;
+	const git_commit *commit;
+	if (curr >= data->total)
+		return NULL;
+	commit = va_arg(data->args, const git_commit *);
+	return commit ? git_commit_id(commit) : NULL;
+}
+
+int git_commit_create_v(
+	git_oid *id,
+	git_repository *repo,
+	const char *update_ref,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_tree *tree,
+	size_t parent_count,
+	...)
+{
+	int error = 0;
+	commit_parent_varargs data;
+
+	assert(tree && git_tree_owner(tree) == repo);
+
+	data.total = parent_count;
+	va_start(data.args, parent_count);
+
+	error = git_commit__create_internal(
+		id, repo, update_ref, author, committer,
+		message_encoding, message, git_tree_id(tree),
+		commit_parent_from_varargs, &data, false);
+
+	va_end(data.args);
+	return error;
+}
+
+typedef struct {
+	size_t total;
+	const git_oid **parents;
+} commit_parent_oids;
+
+static const git_oid *commit_parent_from_ids(size_t curr, void *payload)
+{
+	commit_parent_oids *data = payload;
+	return (curr < data->total) ? data->parents[curr] : NULL;
+}
+
+int git_commit_create_from_ids(
+	git_oid *id,
+	git_repository *repo,
+	const char *update_ref,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_oid *tree,
+	size_t parent_count,
+	const git_oid *parents[])
+{
+	commit_parent_oids data = { parent_count, parents };
+
+	return git_commit__create_internal(
+		id, repo, update_ref, author, committer,
+		message_encoding, message, tree,
+		commit_parent_from_ids, &data, true);
+}
+
+typedef struct {
+	size_t total;
+	const git_commit **parents;
+	git_repository *repo;
+} commit_parent_data;
+
+static const git_oid *commit_parent_from_array(size_t curr, void *payload)
+{
+	commit_parent_data *data = payload;
+	const git_commit *commit;
+	if (curr >= data->total)
+		return NULL;
+	commit = data->parents[curr];
+	if (git_commit_owner(commit) != data->repo)
+		return NULL;
+	return git_commit_id(commit);
+}
+
+int git_commit_create(
+	git_oid *id,
+	git_repository *repo,
+	const char *update_ref,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_tree *tree,
+	size_t parent_count,
+	const git_commit *parents[])
+{
+	commit_parent_data data = { parent_count, parents, repo };
+
+	assert(tree && git_tree_owner(tree) == repo);
+
+	return git_commit__create_internal(
+		id, repo, update_ref, author, committer,
+		message_encoding, message, git_tree_id(tree),
+		commit_parent_from_array, &data, false);
+}
+
+static const git_oid *commit_parent_for_amend(size_t curr, void *payload)
+{
+	const git_commit *commit_to_amend = payload;
+	if (curr >= git_array_size(commit_to_amend->parent_ids))
+		return NULL;
+	return git_array_get(commit_to_amend->parent_ids, curr);
+}
+
+int git_commit_amend(
+	git_oid *id,
+	const git_commit *commit_to_amend,
+	const char *update_ref,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_tree *tree)
+{
+	git_repository *repo;
+	git_oid tree_id;
+	git_reference *ref;
+	int error;
+
+	assert(id && commit_to_amend);
+
+	repo = git_commit_owner(commit_to_amend);
+
+	if (!author)
+		author = git_commit_author(commit_to_amend);
+	if (!committer)
+		committer = git_commit_committer(commit_to_amend);
+	if (!message_encoding)
+		message_encoding = git_commit_message_encoding(commit_to_amend);
+	if (!message)
+		message = git_commit_message(commit_to_amend);
+
+	if (!tree) {
+		git_tree *old_tree;
+		GIT_ERROR_CHECK_ERROR( git_commit_tree(&old_tree, commit_to_amend) );
+		git_oid_cpy(&tree_id, git_tree_id(old_tree));
+		git_tree_free(old_tree);
+	} else {
+		assert(git_tree_owner(tree) == repo);
+		git_oid_cpy(&tree_id, git_tree_id(tree));
+	}
+
+	if (update_ref) {
+		if ((error = git_reference_lookup_resolved(&ref, repo, update_ref, 5)) < 0)
+			return error;
+
+		if (git_oid_cmp(git_commit_id(commit_to_amend), git_reference_target(ref))) {
+			git_reference_free(ref);
+			git_error_set(GIT_ERROR_REFERENCE, "commit to amend is not the tip of the given branch");
+			return -1;
+		}
+	}
+
+	error = git_commit__create_internal(
+		id, repo, NULL, author, committer, message_encoding, message,
+		&tree_id, commit_parent_for_amend, (void *)commit_to_amend, false);
+
+	if (!error && update_ref) {
+		error = git_reference__update_for_commit(
+			repo, ref, NULL, id, "commit");
+		git_reference_free(ref);
+	}
+
+	return error;
+}
+
+static int commit_parse(git_commit *commit, const char *data, size_t size, unsigned int flags)
+{
+	const char *buffer_start = data, *buffer;
+	const char *buffer_end = buffer_start + size;
+	git_oid parent_id;
+	size_t header_len;
+	git_signature dummy_sig;
+
+	assert(commit && data);
+
+	buffer = buffer_start;
+
+	/* Allocate for one, which will allow not to realloc 90% of the time  */
+	git_array_init_to_size(commit->parent_ids, 1);
+	GIT_ERROR_CHECK_ARRAY(commit->parent_ids);
+
+	/* The tree is always the first field */
+	if (!(flags & GIT_COMMIT_PARSE_QUICK)) {
+	    if (git_oid__parse(&commit->tree_id, &buffer, buffer_end, "tree ") < 0)
+			goto bad_buffer;
+	} else {
+		size_t tree_len = strlen("tree ") + GIT_OID_HEXSZ + 1;
+		if (buffer + tree_len > buffer_end)
+			goto bad_buffer;
+		buffer += tree_len;
+	}
+
+	/*
+	 * TODO: commit grafts!
+	 */
+
+	while (git_oid__parse(&parent_id, &buffer, buffer_end, "parent ") == 0) {
+		git_oid *new_id = git_array_alloc(commit->parent_ids);
+		GIT_ERROR_CHECK_ALLOC(new_id);
+
+		git_oid_cpy(new_id, &parent_id);
+	}
+
+	if (!(flags & GIT_COMMIT_PARSE_QUICK)) {
+		commit->author = git__malloc(sizeof(git_signature));
+		GIT_ERROR_CHECK_ALLOC(commit->author);
+
+		if (git_signature__parse(commit->author, &buffer, buffer_end, "author ", '\n') < 0)
+			return -1;
+	}
+
+	/* Some tools create multiple author fields, ignore the extra ones */
+	while (!git__prefixncmp(buffer, buffer_end - buffer, "author ")) {
+		if (git_signature__parse(&dummy_sig, &buffer, buffer_end, "author ", '\n') < 0)
+			return -1;
+
+		git__free(dummy_sig.name);
+		git__free(dummy_sig.email);
+	}
+
+	/* Always parse the committer; we need the commit time */
+	commit->committer = git__malloc(sizeof(git_signature));
+	GIT_ERROR_CHECK_ALLOC(commit->committer);
+
+	if (git_signature__parse(commit->committer, &buffer, buffer_end, "committer ", '\n') < 0)
+		return -1;
+
+	if (flags & GIT_COMMIT_PARSE_QUICK)
+		return 0;
+
+	/* Parse add'l header entries */
+	while (buffer < buffer_end) {
+		const char *eoln = buffer;
+		if (buffer[-1] == '\n' && buffer[0] == '\n')
+			break;
+
+		while (eoln < buffer_end && *eoln != '\n')
+			++eoln;
+
+		if (git__prefixncmp(buffer, buffer_end - buffer, "encoding ") == 0) {
+			buffer += strlen("encoding ");
+
+			commit->message_encoding = git__strndup(buffer, eoln - buffer);
+			GIT_ERROR_CHECK_ALLOC(commit->message_encoding);
+		}
+
+		if (eoln < buffer_end && *eoln == '\n')
+			++eoln;
+		buffer = eoln;
+	}
+
+	header_len = buffer - buffer_start;
+	commit->raw_header = git__strndup(buffer_start, header_len);
+	GIT_ERROR_CHECK_ALLOC(commit->raw_header);
+
+	/* point "buffer" to data after header, +1 for the final LF */
+	buffer = buffer_start + header_len + 1;
+
+	/* extract commit message */
+	if (buffer <= buffer_end)
+		commit->raw_message = git__strndup(buffer, buffer_end - buffer);
+	else
+		commit->raw_message = git__strdup("");
+	GIT_ERROR_CHECK_ALLOC(commit->raw_message);
+
+	return 0;
+
+bad_buffer:
+	git_error_set(GIT_ERROR_OBJECT, "failed to parse bad commit object");
+	return -1;
+}
+
+int git_commit__parse_raw(void *commit, const char *data, size_t size)
+{
+	return commit_parse(commit, data, size, 0);
+}
+
+int git_commit__parse_ext(git_commit *commit, git_odb_object *odb_obj, unsigned int flags)
+{
+	return commit_parse(commit, git_odb_object_data(odb_obj), git_odb_object_size(odb_obj), flags);
+}
+
+int git_commit__parse(void *_commit, git_odb_object *odb_obj)
+{
+	return git_commit__parse_ext(_commit, odb_obj, 0);
+}
+
+#define GIT_COMMIT_GETTER(_rvalue, _name, _return) \
+	_rvalue git_commit_##_name(const git_commit *commit) \
+	{\
+		assert(commit); \
+		return _return; \
+	}
+
+GIT_COMMIT_GETTER(const git_signature *, author, commit->author)
+GIT_COMMIT_GETTER(const git_signature *, committer, commit->committer)
+GIT_COMMIT_GETTER(const char *, message_raw, commit->raw_message)
+GIT_COMMIT_GETTER(const char *, message_encoding, commit->message_encoding)
+GIT_COMMIT_GETTER(const char *, raw_header, commit->raw_header)
+GIT_COMMIT_GETTER(git_time_t, time, commit->committer->when.time)
+GIT_COMMIT_GETTER(int, time_offset, commit->committer->when.offset)
+GIT_COMMIT_GETTER(unsigned int, parentcount, (unsigned int)git_array_size(commit->parent_ids))
+GIT_COMMIT_GETTER(const git_oid *, tree_id, &commit->tree_id)
+
+const char *git_commit_message(const git_commit *commit)
+{
+	const char *message;
+
+	assert(commit);
+
+	message = commit->raw_message;
+
+	/* trim leading newlines from raw message */
+	while (*message && *message == '\n')
+		++message;
+
+	return message;
+}
+
+const char *git_commit_summary(git_commit *commit)
+{
+	git_buf summary = GIT_BUF_INIT;
+	const char *msg, *space;
+	bool space_contains_newline = false;
+
+	assert(commit);
+
+	if (!commit->summary) {
+		for (msg = git_commit_message(commit), space = NULL; *msg; ++msg) {
+			char next_character = msg[0];
+			/* stop processing at the end of the first paragraph */
+			if (next_character == '\n' && (!msg[1] || msg[1] == '\n'))
+				break;
+			/* record the beginning of contiguous whitespace runs */
+			else if (git__isspace(next_character)) {
+				if(space == NULL) {
+					space = msg;
+					space_contains_newline = false;
+				}
+				space_contains_newline |= next_character == '\n';
+			}
+			/* the next character is non-space */
+			else {
+				/* process any recorded whitespace */
+				if (space) {
+					if(space_contains_newline)
+						git_buf_putc(&summary, ' '); /* if the space contains a newline, collapse to ' ' */
+					else
+						git_buf_put(&summary, space, (msg - space)); /* otherwise copy it */
+					space = NULL;
+				}
+				/* copy the next character */
+				git_buf_putc(&summary, next_character);
+			}
+		}
+
+		commit->summary = git_buf_detach(&summary);
+		if (!commit->summary)
+			commit->summary = git__strdup("");
+	}
+
+	return commit->summary;
+}
+
+const char *git_commit_body(git_commit *commit)
+{
+	const char *msg, *end;
+
+	assert(commit);
+
+	if (!commit->body) {
+		/* search for end of summary */
+		for (msg = git_commit_message(commit); *msg; ++msg)
+			if (msg[0] == '\n' && (!msg[1] || msg[1] == '\n'))
+				break;
+
+		/* trim leading and trailing whitespace */
+		for (; *msg; ++msg)
+			if (!git__isspace(*msg))
+				break;
+		for (end = msg + strlen(msg) - 1; msg <= end; --end)
+			if (!git__isspace(*end))
+				break;
+
+		if (*msg)
+			commit->body = git__strndup(msg, end - msg + 1);
+	}
+
+	return commit->body;
+}
+
+int git_commit_tree(git_tree **tree_out, const git_commit *commit)
+{
+	assert(commit);
+	return git_tree_lookup(tree_out, commit->object.repo, &commit->tree_id);
+}
+
+const git_oid *git_commit_parent_id(
+	const git_commit *commit, unsigned int n)
+{
+	assert(commit);
+
+	return git_array_get(commit->parent_ids, n);
+}
+
+int git_commit_parent(
+	git_commit **parent, const git_commit *commit, unsigned int n)
+{
+	const git_oid *parent_id;
+	assert(commit);
+
+	parent_id = git_commit_parent_id(commit, n);
+	if (parent_id == NULL) {
+		git_error_set(GIT_ERROR_INVALID, "parent %u does not exist", n);
+		return GIT_ENOTFOUND;
+	}
+
+	return git_commit_lookup(parent, commit->object.repo, parent_id);
+}
+
+int git_commit_nth_gen_ancestor(
+	git_commit **ancestor,
+	const git_commit *commit,
+	unsigned int n)
+{
+	git_commit *current, *parent = NULL;
+	int error;
+
+	assert(ancestor && commit);
+
+	if (git_commit_dup(&current, (git_commit *)commit) < 0)
+		return -1;
+
+	if (n == 0) {
+		*ancestor = current;
+		return 0;
+	}
+
+	while (n--) {
+		error = git_commit_parent(&parent, current, 0);
+
+		git_commit_free(current);
+
+		if (error < 0)
+			return error;
+
+		current = parent;
+	}
+
+	*ancestor = parent;
+	return 0;
+}
+
+int git_commit_header_field(git_buf *out, const git_commit *commit, const char *field)
+{
+	const char *eol, *buf = commit->raw_header;
+
+	git_buf_clear(out);
+
+	while ((eol = strchr(buf, '\n'))) {
+		/* We can skip continuations here */
+		if (buf[0] == ' ') {
+			buf = eol + 1;
+			continue;
+		}
+
+		/* Skip until we find the field we're after */
+		if (git__prefixcmp(buf, field)) {
+			buf = eol + 1;
+			continue;
+		}
+
+		buf += strlen(field);
+		/* Check that we're not matching a prefix but the field itself */
+		if (buf[0] != ' ') {
+			buf = eol + 1;
+			continue;
+		}
+
+		buf++; /* skip the SP */
+
+		git_buf_put(out, buf, eol - buf);
+		if (git_buf_oom(out))
+			goto oom;
+
+		/* If the next line starts with SP, it's multi-line, we must continue */
+		while (eol[1] == ' ') {
+			git_buf_putc(out, '\n');
+			buf = eol + 2;
+			eol = strchr(buf, '\n');
+			if (!eol)
+				goto malformed;
+
+			git_buf_put(out, buf, eol - buf);
+		}
+
+		if (git_buf_oom(out))
+			goto oom;
+
+		return 0;
+	}
+
+	git_error_set(GIT_ERROR_OBJECT, "no such field '%s'", field);
+	return GIT_ENOTFOUND;
+
+malformed:
+	git_error_set(GIT_ERROR_OBJECT, "malformed header");
+	return -1;
+oom:
+	git_error_set_oom();
+	return -1;
+}
+
+int git_commit_extract_signature(git_buf *signature, git_buf *signed_data, git_repository *repo, git_oid *commit_id, const char *field)
+{
+	git_odb_object *obj;
+	git_odb *odb;
+	const char *buf;
+	const char *h, *eol;
+	int error;
+
+	git_buf_clear(signature);
+	git_buf_clear(signed_data);
+
+	if (!field)
+		field = "gpgsig";
+
+	if ((error = git_repository_odb__weakptr(&odb, repo)) < 0)
+		return error;
+
+	if ((error = git_odb_read(&obj, odb, commit_id)) < 0)
+		return error;
+
+	if (obj->cached.type != GIT_OBJECT_COMMIT) {
+		git_error_set(GIT_ERROR_INVALID, "the requested type does not match the type in ODB");
+		error = GIT_ENOTFOUND;
+		goto cleanup;
+	}
+
+	buf = git_odb_object_data(obj);
+
+	while ((h = strchr(buf, '\n')) && h[1] != '\0') {
+		h++;
+		if (git__prefixcmp(buf, field)) {
+			if (git_buf_put(signed_data, buf, h - buf) < 0)
+				return -1;
+
+			buf = h;
+			continue;
+		}
+
+		h = buf;
+		h += strlen(field);
+		eol = strchr(h, '\n');
+		if (h[0] != ' ') {
+			buf = h;
+			continue;
+		}
+		if (!eol)
+			goto malformed;
+
+		h++; /* skip the SP */
+
+		git_buf_put(signature, h, eol - h);
+		if (git_buf_oom(signature))
+			goto oom;
+
+		/* If the next line starts with SP, it's multi-line, we must continue */
+		while (eol[1] == ' ') {
+			git_buf_putc(signature, '\n');
+			h = eol + 2;
+			eol = strchr(h, '\n');
+			if (!eol)
+				goto malformed;
+
+			git_buf_put(signature, h, eol - h);
+		}
+
+		if (git_buf_oom(signature))
+			goto oom;
+
+		error = git_buf_puts(signed_data, eol+1);
+		git_odb_object_free(obj);
+		return error;
+	}
+
+	git_error_set(GIT_ERROR_OBJECT, "this commit is not signed");
+	error = GIT_ENOTFOUND;
+	goto cleanup;
+
+malformed:
+	git_error_set(GIT_ERROR_OBJECT, "malformed header");
+	error = -1;
+	goto cleanup;
+oom:
+	git_error_set_oom();
+	error = -1;
+	goto cleanup;
+
+cleanup:
+	git_odb_object_free(obj);
+	git_buf_clear(signature);
+	git_buf_clear(signed_data);
+	return error;
+}
+
+int git_commit_create_buffer(git_buf *out,
+	git_repository *repo,
+	const git_signature *author,
+	const git_signature *committer,
+	const char *message_encoding,
+	const char *message,
+	const git_tree *tree,
+	size_t parent_count,
+	const git_commit *parents[])
+{
+	int error;
+	commit_parent_data data = { parent_count, parents, repo };
+	git_array_oid_t parents_arr = GIT_ARRAY_INIT;
+	const git_oid *tree_id;
+
+	assert(tree && git_tree_owner(tree) == repo);
+
+	tree_id = git_tree_id(tree);
+
+	if ((error = validate_tree_and_parents(&parents_arr, repo, tree_id, commit_parent_from_array, &data, NULL, true)) < 0)
+		return error;
+
+	error = git_commit__create_buffer_internal(
+		out, author, committer,
+		message_encoding, message, tree_id,
+		&parents_arr);
+
+	git_array_clear(parents_arr);
+	return error;
+}
+
+/**
+ * Append to 'out' properly marking continuations when there's a newline in 'content'
+ */
+static void format_header_field(git_buf *out, const char *field, const char *content)
+{
+	const char *lf;
+
+	assert(out && field && content);
+
+	git_buf_puts(out, field);
+	git_buf_putc(out, ' ');
+
+	while ((lf = strchr(content, '\n')) != NULL) {
+		git_buf_put(out, content, lf - content);
+		git_buf_puts(out, "\n ");
+		content = lf + 1;
+	}
+
+	git_buf_puts(out, content);
+	git_buf_putc(out, '\n');
+}
+
+static const git_oid *commit_parent_from_commit(size_t n, void *payload)
+{
+	const git_commit *commit = (const git_commit *) payload;
+
+	return git_array_get(commit->parent_ids, n);
+
+}
+
+int git_commit_create_with_signature(
+	git_oid *out,
+	git_repository *repo,
+	const char *commit_content,
+	const char *signature,
+	const char *signature_field)
+{
+	git_odb *odb;
+	int error = 0;
+	const char *field;
+	const char *header_end;
+	git_buf commit = GIT_BUF_INIT;
+	git_commit *parsed;
+	git_array_oid_t parents = GIT_ARRAY_INIT;
+
+	/* The first step is to verify that all the tree and parents exist */
+	parsed = git__calloc(1, sizeof(git_commit));
+	GIT_ERROR_CHECK_ALLOC(parsed);
+	if ((error = commit_parse(parsed, commit_content, strlen(commit_content), 0)) < 0)
+		goto cleanup;
+
+	if ((error = validate_tree_and_parents(&parents, repo, &parsed->tree_id, commit_parent_from_commit, parsed, NULL, true)) < 0)
+		goto cleanup;
+
+	git_array_clear(parents);
+
+	/* Then we start appending by identifying the end of the commit header */
+	header_end = strstr(commit_content, "\n\n");
+	if (!header_end) {
+		git_error_set(GIT_ERROR_INVALID, "malformed commit contents");
+		error = -1;
+		goto cleanup;
+	}
+
+	/* The header ends after the first LF */
+	header_end++;
+	git_buf_put(&commit, commit_content, header_end - commit_content);
+
+	if (signature != NULL) {
+		field = signature_field ? signature_field : "gpgsig";
+		format_header_field(&commit, field, signature);
+	}
+
+	git_buf_puts(&commit, header_end);
+
+	if (git_buf_oom(&commit))
+		return -1;
+
+	if ((error = git_repository_odb__weakptr(&odb, repo)) < 0)
+		goto cleanup;
+
+	if ((error = git_odb_write(out, odb, commit.ptr, commit.size, GIT_OBJECT_COMMIT)) < 0)
+		goto cleanup;
+
+cleanup:
+	git_commit__free(parsed);
+	git_buf_dispose(&commit);
+	return error;
+}
+
+int git_commit_committer_with_mailmap(
+	git_signature **out, const git_commit *commit, const git_mailmap *mailmap)
+{
+	return git_mailmap_resolve_signature(out, mailmap, commit->committer);
+}
+
+int git_commit_author_with_mailmap(
+	git_signature **out, const git_commit *commit, const git_mailmap *mailmap)
+{
+	return git_mailmap_resolve_signature(out, mailmap, commit->author);
+}

node_modules/nodegit/vendor/libgit2/src/commit.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_commit_h__
+#define INCLUDE_commit_h__
+
+#include "common.h"
+
+#include "git2/commit.h"
+#include "tree.h"
+#include "repository.h"
+#include "array.h"
+
+#include <time.h>
+
+struct git_commit {
+	git_object object;
+
+	git_array_t(git_oid) parent_ids;
+	git_oid tree_id;
+
+	git_signature *author;
+	git_signature *committer;
+
+	char *message_encoding;
+	char *raw_message;
+	char *raw_header;
+
+	char *summary;
+	char *body;
+};
+
+void git_commit__free(void *commit);
+int git_commit__parse(void *commit, git_odb_object *obj);
+int git_commit__parse_raw(void *commit, const char *data, size_t size);
+
+typedef enum {
+	GIT_COMMIT_PARSE_QUICK = (1 << 0), /**< Only parse parents and committer info */
+} git_commit__parse_flags;
+
+int git_commit__parse_ext(git_commit *commit, git_odb_object *odb_obj, unsigned int flags);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/commit_list.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "commit_list.h"
+
+#include "revwalk.h"
+#include "pool.h"
+#include "odb.h"
+#include "commit.h"
+
+int git_commit_list_time_cmp(const void *a, const void *b)
+{
+	int64_t time_a = ((git_commit_list_node *) a)->time;
+	int64_t time_b = ((git_commit_list_node *) b)->time;
+
+	if (time_a < time_b)
+		return 1;
+	if (time_a > time_b)
+		return -1;
+
+	return 0;
+}
+
+git_commit_list *git_commit_list_insert(git_commit_list_node *item, git_commit_list **list_p)
+{
+	git_commit_list *new_list = git__malloc(sizeof(git_commit_list));
+	if (new_list != NULL) {
+		new_list->item = item;
+		new_list->next = *list_p;
+	}
+	*list_p = new_list;
+	return new_list;
+}
+
+git_commit_list *git_commit_list_insert_by_date(git_commit_list_node *item, git_commit_list **list_p)
+{
+	git_commit_list **pp = list_p;
+	git_commit_list *p;
+
+	while ((p = *pp) != NULL) {
+		if (git_commit_list_time_cmp(p->item, item) > 0)
+			break;
+
+		pp = &p->next;
+	}
+
+	return git_commit_list_insert(item, pp);
+}
+
+git_commit_list_node *git_commit_list_alloc_node(git_revwalk *walk)
+{
+	return (git_commit_list_node *)git_pool_mallocz(&walk->commit_pool, 1);
+}
+
+static git_commit_list_node **alloc_parents(
+	git_revwalk *walk, git_commit_list_node *commit, size_t n_parents)
+{
+	size_t bytes;
+
+	if (n_parents <= PARENTS_PER_COMMIT)
+		return (git_commit_list_node **)((char *)commit + sizeof(git_commit_list_node));
+
+	if (git__multiply_sizet_overflow(&bytes, n_parents, sizeof(git_commit_list_node *)))
+		return NULL;
+
+	return (git_commit_list_node **)git_pool_malloc(&walk->commit_pool, bytes);
+}
+
+
+void git_commit_list_free(git_commit_list **list_p)
+{
+	git_commit_list *list = *list_p;
+
+	if (list == NULL)
+		return;
+
+	while (list) {
+		git_commit_list *temp = list;
+		list = temp->next;
+		git__free(temp);
+	}
+
+	*list_p = NULL;
+}
+
+git_commit_list_node *git_commit_list_pop(git_commit_list **stack)
+{
+	git_commit_list *top = *stack;
+	git_commit_list_node *item = top ? top->item : NULL;
+
+	if (top) {
+		*stack = top->next;
+		git__free(top);
+	}
+	return item;
+}
+
+static int commit_quick_parse(
+	git_revwalk *walk,
+	git_commit_list_node *node,
+	git_odb_object *obj)
+{
+	git_oid *parent_oid;
+	git_commit *commit;
+	int error;
+	size_t i;
+
+	commit = git__calloc(1, sizeof(*commit));
+	GIT_ERROR_CHECK_ALLOC(commit);
+	commit->object.repo = walk->repo;
+
+	if ((error = git_commit__parse_ext(commit, obj, GIT_COMMIT_PARSE_QUICK)) < 0) {
+		git__free(commit);
+		return error;
+	}
+
+	if (!git__is_uint16(git_array_size(commit->parent_ids))) {
+		git__free(commit);
+		git_error_set(GIT_ERROR_INVALID, "commit has more than 2^16 parents");
+		return -1;
+	}
+
+	node->time = commit->committer->when.time;
+	node->out_degree = (uint16_t) git_array_size(commit->parent_ids);
+	node->parents = alloc_parents(walk, node, node->out_degree);
+	GIT_ERROR_CHECK_ALLOC(node->parents);
+
+	git_array_foreach(commit->parent_ids, i, parent_oid) {
+		node->parents[i] = git_revwalk__commit_lookup(walk, parent_oid);
+	}
+
+	git_commit__free(commit);
+
+	node->parsed = 1;
+
+	return 0;
+}
+
+int git_commit_list_parse(git_revwalk *walk, git_commit_list_node *commit)
+{
+	git_odb_object *obj;
+	int error;
+
+	if (commit->parsed)
+		return 0;
+
+	if ((error = git_odb_read(&obj, walk->odb, &commit->oid)) < 0)
+		return error;
+
+	if (obj->cached.type != GIT_OBJECT_COMMIT) {
+		git_error_set(GIT_ERROR_INVALID, "object is no commit object");
+		error = -1;
+	} else
+		error = commit_quick_parse(walk, commit, obj);
+
+	git_odb_object_free(obj);
+	return error;
+}
+

node_modules/nodegit/vendor/libgit2/src/commit_list.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_commit_list_h__
+#define INCLUDE_commit_list_h__
+
+#include "common.h"
+
+#include "git2/oid.h"
+
+#define PARENT1  (1 << 0)
+#define PARENT2  (1 << 1)
+#define RESULT   (1 << 2)
+#define STALE    (1 << 3)
+#define ALL_FLAGS (PARENT1 | PARENT2 | STALE | RESULT)
+
+#define PARENTS_PER_COMMIT	2
+#define COMMIT_ALLOC \
+	(sizeof(git_commit_list_node) + PARENTS_PER_COMMIT * sizeof(git_commit_list_node *))
+
+#define FLAG_BITS 4
+
+typedef struct git_commit_list_node {
+	git_oid oid;
+	int64_t time;
+	unsigned int seen:1,
+			 uninteresting:1,
+			 topo_delay:1,
+			 parsed:1,
+			 added:1,
+			 flags : FLAG_BITS;
+
+	uint16_t in_degree;
+	uint16_t out_degree;
+
+	struct git_commit_list_node **parents;
+} git_commit_list_node;
+
+typedef struct git_commit_list {
+	git_commit_list_node *item;
+	struct git_commit_list *next;
+} git_commit_list;
+
+git_commit_list_node *git_commit_list_alloc_node(git_revwalk *walk);
+int git_commit_list_time_cmp(const void *a, const void *b);
+void git_commit_list_free(git_commit_list **list_p);
+git_commit_list *git_commit_list_insert(git_commit_list_node *item, git_commit_list **list_p);
+git_commit_list *git_commit_list_insert_by_date(git_commit_list_node *item, git_commit_list **list_p);
+int git_commit_list_parse(git_revwalk *walk, git_commit_list_node *commit);
+git_commit_list_node *git_commit_list_pop(git_commit_list **stack);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/common.h

@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_common_h__
+#define INCLUDE_common_h__
+
+#ifndef LIBGIT2_NO_FEATURES_H
+# include "git2/sys/features.h"
+#endif
+
+#include "git2/common.h"
+#include "cc-compat.h"
+
+/** Declare a function as always inlined. */
+#if defined(_MSC_VER)
+# define GIT_INLINE(type) static __inline type
+#elif defined(__GNUC__)
+# define GIT_INLINE(type) static __inline__ type
+#else
+# define GIT_INLINE(type) static type
+#endif
+
+/** Support for gcc/clang __has_builtin intrinsic */
+#ifndef __has_builtin
+# define __has_builtin(x) 0
+#endif
+
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef GIT_WIN32
+
+# include <io.h>
+# include <direct.h>
+# include <winsock2.h>
+# include <windows.h>
+# include <ws2tcpip.h>
+# include "win32/msvc-compat.h"
+# include "win32/mingw-compat.h"
+# include "win32/w32_common.h"
+# include "win32/win32-compat.h"
+# include "win32/error.h"
+# include "win32/version.h"
+# ifdef GIT_THREADS
+#	include "win32/thread.h"
+# endif
+
+#else
+
+# include <unistd.h>
+# include <strings.h>
+# ifdef GIT_THREADS
+#	include <pthread.h>
+#	include <sched.h>
+# endif
+#define GIT_STDLIB_CALL
+
+#ifdef GIT_USE_STAT_ATIMESPEC
+# define st_atim st_atimespec
+# define st_ctim st_ctimespec
+# define st_mtim st_mtimespec
+#endif
+
+# include <arpa/inet.h>
+
+#endif
+
+#include "git2/types.h"
+#include "git2/errors.h"
+#include "errors.h"
+#include "thread-utils.h"
+#include "integer.h"
+
+/*
+ * Include the declarations for deprecated functions; this ensures
+ * that they're decorated with the proper extern/visibility attributes.
+ */
+#include "git2/deprecated.h"
+
+#include "posix.h"
+
+#define DEFAULT_BUFSIZE 65536
+#define FILEIO_BUFSIZE DEFAULT_BUFSIZE
+#define FILTERIO_BUFSIZE DEFAULT_BUFSIZE
+#define NETIO_BUFSIZE DEFAULT_BUFSIZE
+
+/**
+ * Check a pointer allocation result, returning -1 if it failed.
+ */
+#define GIT_ERROR_CHECK_ALLOC(ptr) if (ptr == NULL) { return -1; }
+
+/**
+ * Check a buffer allocation result, returning -1 if it failed.
+ */
+#define GIT_ERROR_CHECK_ALLOC_BUF(buf) if ((void *)(buf) == NULL || git_buf_oom(buf)) { return -1; }
+
+/**
+ * Check a return value and propagate result if non-zero.
+ */
+#define GIT_ERROR_CHECK_ERROR(code) \
+	do { int _err = (code); if (_err) return _err; } while (0)
+
+/**
+ * Check a versioned structure for validity
+ */
+GIT_INLINE(int) git_error__check_version(const void *structure, unsigned int expected_max, const char *name)
+{
+	unsigned int actual;
+
+	if (!structure)
+		return 0;
+
+	actual = *(const unsigned int*)structure;
+	if (actual > 0 && actual <= expected_max)
+		return 0;
+
+	git_error_set(GIT_ERROR_INVALID, "invalid version %d on %s", actual, name);
+	return -1;
+}
+#define GIT_ERROR_CHECK_VERSION(S,V,N) if (git_error__check_version(S,V,N) < 0) return -1
+
+/**
+ * Initialize a structure with a version.
+ */
+GIT_INLINE(void) git__init_structure(void *structure, size_t len, unsigned int version)
+{
+	memset(structure, 0, len);
+	*((int*)structure) = version;
+}
+#define GIT_INIT_STRUCTURE(S,V) git__init_structure(S, sizeof(*S), V)
+
+#define GIT_INIT_STRUCTURE_FROM_TEMPLATE(PTR,VERSION,TYPE,TPL) do { \
+	TYPE _tmpl = TPL; \
+	GIT_ERROR_CHECK_VERSION(&(VERSION), _tmpl.version, #TYPE);	\
+	memcpy((PTR), &_tmpl, sizeof(_tmpl)); } while (0)
+
+
+/** Check for additive overflow, setting an error if would occur. */
+#define GIT_ADD_SIZET_OVERFLOW(out, one, two) \
+	(git__add_sizet_overflow(out, one, two) ? (git_error_set_oom(), 1) : 0)
+
+/** Check for additive overflow, setting an error if would occur. */
+#define GIT_MULTIPLY_SIZET_OVERFLOW(out, nelem, elsize) \
+	(git__multiply_sizet_overflow(out, nelem, elsize) ? (git_error_set_oom(), 1) : 0)
+
+/** Check for additive overflow, failing if it would occur. */
+#define GIT_ERROR_CHECK_ALLOC_ADD(out, one, two) \
+	if (GIT_ADD_SIZET_OVERFLOW(out, one, two)) { return -1; }
+
+#define GIT_ERROR_CHECK_ALLOC_ADD3(out, one, two, three) \
+	if (GIT_ADD_SIZET_OVERFLOW(out, one, two) || \
+		GIT_ADD_SIZET_OVERFLOW(out, *(out), three)) { return -1; }
+
+#define GIT_ERROR_CHECK_ALLOC_ADD4(out, one, two, three, four) \
+	if (GIT_ADD_SIZET_OVERFLOW(out, one, two) || \
+		GIT_ADD_SIZET_OVERFLOW(out, *(out), three) || \
+		GIT_ADD_SIZET_OVERFLOW(out, *(out), four)) { return -1; }
+
+#define GIT_ERROR_CHECK_ALLOC_ADD5(out, one, two, three, four, five) \
+	if (GIT_ADD_SIZET_OVERFLOW(out, one, two) || \
+		GIT_ADD_SIZET_OVERFLOW(out, *(out), three) || \
+		GIT_ADD_SIZET_OVERFLOW(out, *(out), four) || \
+		GIT_ADD_SIZET_OVERFLOW(out, *(out), five)) { return -1; }
+
+/** Check for multiplicative overflow, failing if it would occur. */
+#define GIT_ERROR_CHECK_ALLOC_MULTIPLY(out, nelem, elsize) \
+	if (GIT_MULTIPLY_SIZET_OVERFLOW(out, nelem, elsize)) { return -1; }
+
+/* NOTE: other git_error functions are in the public errors.h header file */
+
+#include "util.h"
+
+#endif

node_modules/nodegit/vendor/libgit2/src/config.h

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_config_h__
+#define INCLUDE_config_h__
+
+#include "common.h"
+
+#include "git2.h"
+#include "git2/config.h"
+#include "vector.h"
+#include "repository.h"
+
+#define GIT_CONFIG_FILENAME_PROGRAMDATA "config"
+#define GIT_CONFIG_FILENAME_SYSTEM "gitconfig"
+#define GIT_CONFIG_FILENAME_GLOBAL ".gitconfig"
+#define GIT_CONFIG_FILENAME_XDG    "config"
+
+#define GIT_CONFIG_FILENAME_INREPO "config"
+#define GIT_CONFIG_FILE_MODE 0666
+
+struct git_config {
+	git_refcount rc;
+	git_vector backends;
+};
+
+extern int git_config__global_location(git_buf *buf);
+
+extern int git_config_rename_section(
+	git_repository *repo,
+	const char *old_section_name,	/* eg "branch.dummy" */
+	const char *new_section_name);	/* NULL to drop the old section */
+
+extern int git_config__normalize_name(const char *in, char **out);
+
+/* internal only: does not normalize key and sets out to NULL if not found */
+extern int git_config__lookup_entry(
+	git_config_entry **out,
+	const git_config *cfg,
+	const char *key,
+	bool no_errors);
+
+/* internal only: update and/or delete entry string with constraints */
+extern int git_config__update_entry(
+	git_config *cfg,
+	const char *key,
+	const char *value,
+	bool overwrite_existing,
+	bool only_if_existing);
+
+/*
+ * Lookup functions that cannot fail.  These functions look up a config
+ * value and return a fallback value if the value is missing or if any
+ * failures occur while trying to access the value.
+ */
+
+extern char *git_config__get_string_force(
+	const git_config *cfg, const char *key, const char *fallback_value);
+
+extern int git_config__get_bool_force(
+	const git_config *cfg, const char *key, int fallback_value);
+
+extern int git_config__get_int_force(
+	const git_config *cfg, const char *key, int fallback_value);
+
+/* API for repository configmap-style lookups from config - not cached, but
+ * uses configmap value maps and fallbacks
+ */
+extern int git_config__configmap_lookup(
+	int *out, git_config *config, git_configmap_item item);
+
+/**
+ * The opposite of git_config_lookup_map_value, we take an enum value
+ * and map it to the string or bool value on the config.
+ */
+int git_config_lookup_map_enum(git_configmap_t *type_out,
+	const char **str_out, const git_configmap *maps,
+	size_t map_n, int enum_val);
+
+/**
+ * Unlock the backend with the highest priority
+ *
+ * Unlocking will allow other writers to updat the configuration
+ * file. Optionally, any changes performed since the lock will be
+ * applied to the configuration.
+ *
+ * @param cfg the configuration
+ * @param commit boolean which indicates whether to commit any changes
+ * done since locking
+ * @return 0 or an error code
+ */
+GIT_EXTERN(int) git_config_unlock(git_config *cfg, int commit);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/config_backend.h

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_config_file_h__
+#define INCLUDE_config_file_h__
+
+#include "common.h"
+
+#include "git2/sys/config.h"
+#include "git2/config.h"
+
+/**
+ * Create a configuration file backend for ondisk files
+ *
+ * These are the normal `.gitconfig` files that Core Git
+ * processes. Note that you first have to add this file to a
+ * configuration object before you can query it for configuration
+ * variables.
+ *
+ * @param out the new backend
+ * @param path where the config file is located
+ */
+extern int git_config_backend_from_file(git_config_backend **out, const char *path);
+
+/**
+ * Create a readonly configuration file backend from another backend
+ *
+ * This copies the complete contents of the source backend to the
+ * new backend. The new backend will be completely read-only and
+ * cannot be modified.
+ *
+ * @param out the new snapshotted backend
+ * @param source the backend to copy
+ */
+extern int git_config_backend_snapshot(git_config_backend **out, git_config_backend *source);
+
+/**
+ * Create an in-memory configuration file backend
+ *
+ * @param out the new backend
+ * @param cfg the configuration that is to be parsed
+ * @param len the length of the string pointed to by `cfg`
+ */
+extern int git_config_backend_from_string(git_config_backend **out, const char *cfg, size_t len);
+
+GIT_INLINE(int) git_config_backend_open(git_config_backend *cfg, unsigned int level, const git_repository *repo)
+{
+	return cfg->open(cfg, level, repo);
+}
+
+GIT_INLINE(void) git_config_backend_free(git_config_backend *cfg)
+{
+	if (cfg)
+		cfg->free(cfg);
+}
+
+GIT_INLINE(int) git_config_backend_get_string(
+	git_config_entry **out, git_config_backend *cfg, const char *name)
+{
+	return cfg->get(cfg, name, out);
+}
+
+GIT_INLINE(int) git_config_backend_set_string(
+	git_config_backend *cfg, const char *name, const char *value)
+{
+	return cfg->set(cfg, name, value);
+}
+
+GIT_INLINE(int) git_config_backend_delete(
+	git_config_backend *cfg, const char *name)
+{
+	return cfg->del(cfg, name);
+}
+
+GIT_INLINE(int) git_config_backend_foreach(
+	git_config_backend *cfg,
+	int (*fn)(const git_config_entry *entry, void *data),
+	void *data)
+{
+	return git_config_backend_foreach_match(cfg, NULL, fn, data);
+}
+
+GIT_INLINE(int) git_config_backend_lock(git_config_backend *cfg)
+{
+	return cfg->lock(cfg);
+}
+
+GIT_INLINE(int) git_config_backend_unlock(git_config_backend *cfg, int success)
+{
+	return cfg->unlock(cfg, success);
+}
+
+#endif

node_modules/nodegit/vendor/libgit2/src/config_cache.c

@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "futils.h"
+#include "repository.h"
+#include "config.h"
+#include "git2/config.h"
+#include "vector.h"
+#include "filter.h"
+
+struct map_data {
+	const char *name;
+	git_configmap *maps;
+	size_t map_count;
+	int default_value;
+};
+
+/*
+ *	core.eol
+ *		Sets the line ending type to use in the working directory for
+ *	files that have the text property set. Alternatives are lf, crlf
+ *	and native, which uses the platform's native line ending. The default
+ *	value is native. See gitattributes(5) for more information on
+ *	end-of-line conversion.
+ */
+static git_configmap _configmap_eol[] = {
+	{GIT_CONFIGMAP_FALSE, NULL, GIT_EOL_UNSET},
+	{GIT_CONFIGMAP_STRING, "lf", GIT_EOL_LF},
+	{GIT_CONFIGMAP_STRING, "crlf", GIT_EOL_CRLF},
+	{GIT_CONFIGMAP_STRING, "native", GIT_EOL_NATIVE}
+};
+
+/*
+ *	core.autocrlf
+ *		Setting this variable to "true" is almost the same as setting
+ *	the text attribute to "auto" on all files except that text files are
+ *	not guaranteed to be normalized: files that contain CRLF in the
+ *	repository will not be touched. Use this setting if you want to have
+ *	CRLF line endings in your working directory even though the repository
+ *	does not have normalized line endings. This variable can be set to input,
+ *	in which case no output conversion is performed.
+ */
+static git_configmap _configmap_autocrlf[] = {
+	{GIT_CONFIGMAP_FALSE, NULL, GIT_AUTO_CRLF_FALSE},
+	{GIT_CONFIGMAP_TRUE, NULL, GIT_AUTO_CRLF_TRUE},
+	{GIT_CONFIGMAP_STRING, "input", GIT_AUTO_CRLF_INPUT}
+};
+
+static git_configmap _configmap_safecrlf[] = {
+	{GIT_CONFIGMAP_FALSE, NULL, GIT_SAFE_CRLF_FALSE},
+	{GIT_CONFIGMAP_TRUE, NULL, GIT_SAFE_CRLF_FAIL},
+	{GIT_CONFIGMAP_STRING, "warn", GIT_SAFE_CRLF_WARN}
+};
+
+static git_configmap _configmap_logallrefupdates[] = {
+	{GIT_CONFIGMAP_FALSE, NULL, GIT_LOGALLREFUPDATES_FALSE},
+	{GIT_CONFIGMAP_TRUE, NULL, GIT_LOGALLREFUPDATES_TRUE},
+	{GIT_CONFIGMAP_STRING, "always", GIT_LOGALLREFUPDATES_ALWAYS},
+};
+
+/*
+ * Generic map for integer values
+ */
+static git_configmap _configmap_int[] = {
+	{GIT_CONFIGMAP_INT32, NULL, 0},
+};
+
+static struct map_data _configmaps[] = {
+	{"core.autocrlf", _configmap_autocrlf, ARRAY_SIZE(_configmap_autocrlf), GIT_AUTO_CRLF_DEFAULT},
+	{"core.eol", _configmap_eol, ARRAY_SIZE(_configmap_eol), GIT_EOL_DEFAULT},
+	{"core.symlinks", NULL, 0, GIT_SYMLINKS_DEFAULT },
+	{"core.ignorecase", NULL, 0, GIT_IGNORECASE_DEFAULT },
+	{"core.filemode", NULL, 0, GIT_FILEMODE_DEFAULT },
+	{"core.ignorestat", NULL, 0, GIT_IGNORESTAT_DEFAULT },
+	{"core.trustctime", NULL, 0, GIT_TRUSTCTIME_DEFAULT },
+	{"core.abbrev", _configmap_int, 1, GIT_ABBREV_DEFAULT },
+	{"core.precomposeunicode", NULL, 0, GIT_PRECOMPOSE_DEFAULT },
+	{"core.safecrlf", _configmap_safecrlf, ARRAY_SIZE(_configmap_safecrlf), GIT_SAFE_CRLF_DEFAULT},
+	{"core.logallrefupdates", _configmap_logallrefupdates, ARRAY_SIZE(_configmap_logallrefupdates), GIT_LOGALLREFUPDATES_DEFAULT},
+	{"core.protecthfs", NULL, 0, GIT_PROTECTHFS_DEFAULT },
+	{"core.protectntfs", NULL, 0, GIT_PROTECTNTFS_DEFAULT },
+	{"core.fsyncobjectfiles", NULL, 0, GIT_FSYNCOBJECTFILES_DEFAULT },
+};
+
+int git_config__configmap_lookup(int *out, git_config *config, git_configmap_item item)
+{
+	int error = 0;
+	struct map_data *data = &_configmaps[(int)item];
+	git_config_entry *entry;
+
+	if ((error = git_config__lookup_entry(&entry, config, data->name, false)) < 0)
+		return error;
+
+	if (!entry)
+		*out = data->default_value;
+	else if (data->maps)
+		error = git_config_lookup_map_value(
+			out, data->maps, data->map_count, entry->value);
+	else
+		error = git_config_parse_bool(out, entry->value);
+
+	git_config_entry_free(entry);
+	return error;
+}
+
+int git_repository__configmap_lookup(int *out, git_repository *repo, git_configmap_item item)
+{
+	*out = repo->configmap_cache[(int)item];
+
+	if (*out == GIT_CONFIGMAP_NOT_CACHED) {
+		int error;
+		git_config *config;
+
+		if ((error = git_repository_config__weakptr(&config, repo)) < 0 ||
+			(error = git_config__configmap_lookup(out, config, item)) < 0)
+			return error;
+
+		repo->configmap_cache[(int)item] = *out;
+	}
+
+	return 0;
+}
+
+void git_repository__configmap_lookup_cache_clear(git_repository *repo)
+{
+	int i;
+
+	for (i = 0; i < GIT_CONFIGMAP_CACHE_MAX; ++i)
+		repo->configmap_cache[i] = GIT_CONFIGMAP_NOT_CACHED;
+}
+

node_modules/nodegit/vendor/libgit2/src/config_entries.c

@@ -0,0 +1,229 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "config_entries.h"
+
+typedef struct config_entry_list {
+	struct config_entry_list *next;
+	struct config_entry_list *last;
+	git_config_entry *entry;
+	bool first;
+} config_entry_list;
+
+typedef struct config_entries_iterator {
+	git_config_iterator parent;
+	git_config_entries *entries;
+	config_entry_list *head;
+} config_entries_iterator;
+
+struct git_config_entries {
+	git_refcount rc;
+	git_strmap *map;
+	config_entry_list *list;
+};
+
+int git_config_entries_new(git_config_entries **out)
+{
+	git_config_entries *entries;
+	int error;
+
+	entries = git__calloc(1, sizeof(git_config_entries));
+	GIT_ERROR_CHECK_ALLOC(entries);
+	GIT_REFCOUNT_INC(entries);
+
+	if ((error = git_strmap_new(&entries->map)) < 0)
+		git__free(entries);
+	else
+		*out = entries;
+
+	return error;
+}
+
+int git_config_entries_dup_entry(git_config_entries *entries, const git_config_entry *entry)
+{
+	git_config_entry *duplicated;
+	int error;
+
+	duplicated = git__calloc(1, sizeof(git_config_entry));
+	GIT_ERROR_CHECK_ALLOC(duplicated);
+
+	duplicated->name = git__strdup(entry->name);
+	GIT_ERROR_CHECK_ALLOC(duplicated->name);
+
+	if (entry->value) {
+		duplicated->value = git__strdup(entry->value);
+		GIT_ERROR_CHECK_ALLOC(duplicated->value);
+	}
+	duplicated->level = entry->level;
+	duplicated->include_depth = entry->include_depth;
+
+	if ((error = git_config_entries_append(entries, duplicated)) < 0)
+		goto out;
+
+out:
+	if (error && duplicated) {
+		git__free((char *) duplicated->name);
+		git__free((char *) duplicated->value);
+		git__free(duplicated);
+	}
+	return error;
+}
+
+int git_config_entries_dup(git_config_entries **out, git_config_entries *entries)
+{
+	git_config_entries *result = NULL;
+	config_entry_list *head;
+	int error;
+
+	if ((error = git_config_entries_new(&result)) < 0)
+		goto out;
+
+	for (head = entries->list; head; head = head->next)
+		if ((git_config_entries_dup_entry(result, head->entry)) < 0)
+			goto out;
+
+	*out = result;
+	result = NULL;
+
+out:
+	git_config_entries_free(result);
+	return error;
+}
+
+void git_config_entries_incref(git_config_entries *entries)
+{
+	GIT_REFCOUNT_INC(entries);
+}
+
+static void config_entries_free(git_config_entries *entries)
+{
+	config_entry_list *list = NULL, *next;
+
+	git_strmap_free(entries->map);
+
+	list = entries->list;
+	while (list != NULL) {
+		next = list->next;
+		if (list->first)
+			git__free((char *) list->entry->name);
+		git__free((char *) list->entry->value);
+		git__free(list->entry);
+		git__free(list);
+		list = next;
+	}
+
+	git__free(entries);
+}
+
+void git_config_entries_free(git_config_entries *entries)
+{
+	if (entries)
+		GIT_REFCOUNT_DEC(entries, config_entries_free);
+}
+
+int git_config_entries_append(git_config_entries *entries, git_config_entry *entry)
+{
+	config_entry_list *existing, *head;
+
+	head = git__calloc(1, sizeof(config_entry_list));
+	GIT_ERROR_CHECK_ALLOC(head);
+	head->entry = entry;
+
+	/*
+	 * This is a micro-optimization for configuration files
+	 * with a lot of same keys. As for multivars the entry's
+	 * key will be the same for all entries, we can just free
+	 * all except the first entry's name and just re-use it.
+	 */
+	if ((existing = git_strmap_get(entries->map, entry->name)) != NULL) {
+		git__free((char *) entry->name);
+		entry->name = existing->entry->name;
+	} else {
+		head->first = 1;
+	}
+
+	if (entries->list)
+		entries->list->last->next = head;
+	else
+		entries->list = head;
+	entries->list->last = head;
+
+	if (git_strmap_set(entries->map, entry->name, head) < 0)
+		return -1;
+
+	return 0;
+}
+
+int git_config_entries_get(git_config_entry **out, git_config_entries *entries, const char *key)
+{
+	config_entry_list *entry;
+	if ((entry = git_strmap_get(entries->map, key)) == NULL)
+		return GIT_ENOTFOUND;
+	*out = entry->entry;
+	return 0;
+}
+
+int git_config_entries_get_unique(git_config_entry **out, git_config_entries *entries, const char *key)
+{
+	config_entry_list *entry;
+
+	if ((entry = git_strmap_get(entries->map, key)) == NULL)
+		return GIT_ENOTFOUND;
+
+	if (!entry->first) {
+		git_error_set(GIT_ERROR_CONFIG, "entry is not unique due to being a multivar");
+		return -1;
+	}
+
+	if (entry->entry->include_depth) {
+		git_error_set(GIT_ERROR_CONFIG, "entry is not unique due to being included");
+		return -1;
+	}
+
+	*out = entry->entry;
+
+	return 0;
+}
+
+static void config_iterator_free(git_config_iterator *iter)
+{
+	config_entries_iterator *it = (config_entries_iterator *) iter;
+	git_config_entries_free(it->entries);
+	git__free(it);
+}
+
+static int config_iterator_next(
+	git_config_entry **entry,
+	git_config_iterator *iter)
+{
+	config_entries_iterator *it = (config_entries_iterator *) iter;
+
+	if (!it->head)
+		return GIT_ITEROVER;
+
+	*entry = it->head->entry;
+	it->head = it->head->next;
+
+	return 0;
+}
+
+int git_config_entries_iterator_new(git_config_iterator **out, git_config_entries *entries)
+{
+	config_entries_iterator *it;
+
+	it = git__calloc(1, sizeof(config_entries_iterator));
+	GIT_ERROR_CHECK_ALLOC(it);
+	it->parent.next = config_iterator_next;
+	it->parent.free = config_iterator_free;
+	it->head = entries->list;
+	it->entries = entries;
+
+	git_config_entries_incref(entries);
+	*out = &it->parent;
+
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/config_entries.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "git2/sys/config.h"
+#include "config.h"
+
+typedef struct git_config_entries git_config_entries;
+
+int git_config_entries_new(git_config_entries **out);
+int git_config_entries_dup(git_config_entries **out, git_config_entries *entries);
+int git_config_entries_dup_entry(git_config_entries *entries, const git_config_entry *entry);
+void git_config_entries_incref(git_config_entries *entries);
+void git_config_entries_free(git_config_entries *entries);
+/* Add or append the new config option */
+int git_config_entries_append(git_config_entries *entries, git_config_entry *entry);
+int git_config_entries_get(git_config_entry **out, git_config_entries *entries, const char *key);
+int git_config_entries_get_unique(git_config_entry **out, git_config_entries *entries, const char *key);
+int git_config_entries_iterator_new(git_config_iterator **out, git_config_entries *entries);

node_modules/nodegit/vendor/libgit2/src/config_mem.c

@@ -0,0 +1,220 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "config.h"
+
+#include "config_backend.h"
+#include "config_parse.h"
+#include "config_entries.h"
+
+typedef struct {
+	git_config_backend parent;
+	git_config_entries *entries;
+	git_buf cfg;
+} config_memory_backend;
+
+typedef struct {
+	git_config_entries *entries;
+	git_config_level_t level;
+} config_memory_parse_data;
+
+static int config_error_readonly(void)
+{
+	git_error_set(GIT_ERROR_CONFIG, "this backend is read-only");
+	return -1;
+}
+
+static int read_variable_cb(
+	git_config_parser *reader,
+	const char *current_section,
+	const char *var_name,
+	const char *var_value,
+	const char *line,
+	size_t line_len,
+	void *payload)
+{
+	config_memory_parse_data *parse_data = (config_memory_parse_data *) payload;
+	git_buf buf = GIT_BUF_INIT;
+	git_config_entry *entry;
+	const char *c;
+	int result;
+
+	GIT_UNUSED(reader);
+	GIT_UNUSED(line);
+	GIT_UNUSED(line_len);
+
+	if (current_section) {
+		/* TODO: Once warnings land, we should likely warn
+		 * here. Git appears to warn in most cases if it sees
+		 * un-namespaced config options.
+		 */
+		git_buf_puts(&buf, current_section);
+		git_buf_putc(&buf, '.');
+	}
+
+	for (c = var_name; *c; c++)
+		git_buf_putc(&buf, git__tolower(*c));
+
+	if (git_buf_oom(&buf))
+		return -1;
+
+	entry = git__calloc(1, sizeof(git_config_entry));
+	GIT_ERROR_CHECK_ALLOC(entry);
+	entry->name = git_buf_detach(&buf);
+	entry->value = var_value ? git__strdup(var_value) : NULL;
+	entry->level = parse_data->level;
+	entry->include_depth = 0;
+
+	if ((result = git_config_entries_append(parse_data->entries, entry)) < 0)
+		return result;
+
+	return result;
+}
+
+static int config_memory_open(git_config_backend *backend, git_config_level_t level, const git_repository *repo)
+{
+	config_memory_backend *memory_backend = (config_memory_backend *) backend;
+	git_config_parser parser = GIT_PARSE_CTX_INIT;
+	config_memory_parse_data parse_data;
+	int error;
+
+	GIT_UNUSED(repo);
+
+	if ((error = git_config_parser_init(&parser, "in-memory", memory_backend->cfg.ptr,
+					    memory_backend->cfg.size)) < 0)
+		goto out;
+	parse_data.entries = memory_backend->entries;
+	parse_data.level = level;
+
+	if ((error = git_config_parse(&parser, NULL, read_variable_cb, NULL, NULL, &parse_data)) < 0)
+		goto out;
+
+out:
+	git_config_parser_dispose(&parser);
+	return error;
+}
+
+static int config_memory_get(git_config_backend *backend, const char *key, git_config_entry **out)
+{
+	config_memory_backend *memory_backend = (config_memory_backend *) backend;
+	return git_config_entries_get(out, memory_backend->entries, key);
+}
+
+static int config_memory_iterator(
+	git_config_iterator **iter,
+	git_config_backend *backend)
+{
+	config_memory_backend *memory_backend = (config_memory_backend *) backend;
+	git_config_entries *entries;
+	int error;
+
+	if ((error = git_config_entries_dup(&entries, memory_backend->entries)) < 0)
+		goto out;
+
+	if ((error = git_config_entries_iterator_new(iter, entries)) < 0)
+		goto out;
+
+out:
+	/* Let iterator delete duplicated entries when it's done */
+	git_config_entries_free(entries);
+	return error;
+}
+
+static int config_memory_set(git_config_backend *backend, const char *name, const char *value)
+{
+	GIT_UNUSED(backend);
+	GIT_UNUSED(name);
+	GIT_UNUSED(value);
+	return config_error_readonly();
+}
+
+static int config_memory_set_multivar(
+	git_config_backend *backend, const char *name, const char *regexp, const char *value)
+{
+	GIT_UNUSED(backend);
+	GIT_UNUSED(name);
+	GIT_UNUSED(regexp);
+	GIT_UNUSED(value);
+	return config_error_readonly();
+}
+
+static int config_memory_delete(git_config_backend *backend, const char *name)
+{
+	GIT_UNUSED(backend);
+	GIT_UNUSED(name);
+	return config_error_readonly();
+}
+
+static int config_memory_delete_multivar(git_config_backend *backend, const char *name, const char *regexp)
+{
+	GIT_UNUSED(backend);
+	GIT_UNUSED(name);
+	GIT_UNUSED(regexp);
+	return config_error_readonly();
+}
+
+static int config_memory_lock(git_config_backend *backend)
+{
+	GIT_UNUSED(backend);
+	return config_error_readonly();
+}
+
+static int config_memory_unlock(git_config_backend *backend, int success)
+{
+	GIT_UNUSED(backend);
+	GIT_UNUSED(success);
+	return config_error_readonly();
+}
+
+static void config_memory_free(git_config_backend *_backend)
+{
+	config_memory_backend *backend = (config_memory_backend *)_backend;
+
+	if (backend == NULL)
+		return;
+
+	git_config_entries_free(backend->entries);
+	git_buf_dispose(&backend->cfg);
+	git__free(backend);
+}
+
+int git_config_backend_from_string(git_config_backend **out, const char *cfg, size_t len)
+{
+	config_memory_backend *backend;
+
+	backend = git__calloc(1, sizeof(config_memory_backend));
+	GIT_ERROR_CHECK_ALLOC(backend);
+
+	if (git_config_entries_new(&backend->entries) < 0) {
+		git__free(backend);
+		return -1;
+	}
+
+	if (git_buf_set(&backend->cfg, cfg, len) < 0) {
+		git_config_entries_free(backend->entries);
+		git__free(backend);
+		return -1;
+	}
+
+	backend->parent.version = GIT_CONFIG_BACKEND_VERSION;
+	backend->parent.readonly = 1;
+	backend->parent.open = config_memory_open;
+	backend->parent.get = config_memory_get;
+	backend->parent.set = config_memory_set;
+	backend->parent.set_multivar = config_memory_set_multivar;
+	backend->parent.del = config_memory_delete;
+	backend->parent.del_multivar = config_memory_delete_multivar;
+	backend->parent.iterator = config_memory_iterator;
+	backend->parent.lock = config_memory_lock;
+	backend->parent.unlock = config_memory_unlock;
+	backend->parent.snapshot = git_config_backend_snapshot;
+	backend->parent.free = config_memory_free;
+
+	*out = (git_config_backend *)backend;
+
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/config_parse.c

@@ -0,0 +1,578 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "config_parse.h"
+
+#include "buf_text.h"
+
+#include <ctype.h>
+
+const char *git_config_escapes = "ntb\"\\";
+const char *git_config_escaped = "\n\t\b\"\\";
+
+static void set_parse_error(git_config_parser *reader, int col, const char *error_str)
+{
+	if (col)
+		git_error_set(GIT_ERROR_CONFIG,
+		              "failed to parse config file: %s (in %s:%"PRIuZ", column %d)",
+		              error_str, reader->path, reader->ctx.line_num, col);
+	else
+		git_error_set(GIT_ERROR_CONFIG,
+		              "failed to parse config file: %s (in %s:%"PRIuZ")",
+		              error_str, reader->path, reader->ctx.line_num);
+}
+
+
+GIT_INLINE(int) config_keychar(int c)
+{
+	return isalnum(c) || c == '-';
+}
+
+static int strip_comments(char *line, int in_quotes)
+{
+	int quote_count = in_quotes, backslash_count = 0;
+	char *ptr;
+
+	for (ptr = line; *ptr; ++ptr) {
+		if (ptr[0] == '"' && ptr > line && ptr[-1] != '\\')
+			quote_count++;
+
+		if ((ptr[0] == ';' || ptr[0] == '#') &&
+			(quote_count % 2) == 0 &&
+			(backslash_count % 2) == 0) {
+			ptr[0] = '\0';
+			break;
+		}
+
+		if (ptr[0] == '\\')
+			backslash_count++;
+		else
+			backslash_count = 0;
+	}
+
+	/* skip any space at the end */
+	while (ptr > line && git__isspace(ptr[-1])) {
+		ptr--;
+	}
+	ptr[0] = '\0';
+
+	return quote_count;
+}
+
+
+static int parse_subsection_header(git_config_parser *reader, const char *line, size_t pos, const char *base_name, char **section_name)
+{
+	int c, rpos;
+	const char *first_quote, *last_quote;
+	const char *line_start = line;
+	git_buf buf = GIT_BUF_INIT;
+	size_t quoted_len, alloc_len, base_name_len = strlen(base_name);
+
+	/* Skip any additional whitespace before our section name */
+	while (git__isspace(line[pos]))
+		pos++;
+
+	/* We should be at the first quotation mark. */
+	if (line[pos] != '"') {
+		set_parse_error(reader, 0, "missing quotation marks in section header");
+		goto end_error;
+	}
+
+	first_quote = &line[pos];
+	last_quote = strrchr(line, '"');
+	quoted_len = last_quote - first_quote;
+
+	if ((last_quote - line) > INT_MAX) {
+		set_parse_error(reader, 0, "invalid section header, line too long");
+		goto end_error;
+	}
+
+	if (quoted_len == 0) {
+		set_parse_error(reader, 0, "missing closing quotation mark in section header");
+		goto end_error;
+	}
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, base_name_len, quoted_len);
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, 2);
+
+	if (git_buf_grow(&buf, alloc_len) < 0 ||
+	    git_buf_printf(&buf, "%s.", base_name) < 0)
+		goto end_error;
+
+	rpos = 0;
+
+	line = first_quote;
+	c = line[++rpos];
+
+	/*
+	 * At the end of each iteration, whatever is stored in c will be
+	 * added to the string. In case of error, jump to out
+	 */
+	do {
+
+		switch (c) {
+		case 0:
+			set_parse_error(reader, 0, "unexpected end-of-line in section header");
+			goto end_error;
+
+		case '"':
+			goto end_parse;
+
+		case '\\':
+			c = line[++rpos];
+
+			if (c == 0) {
+				set_parse_error(reader, rpos, "unexpected end-of-line in section header");
+				goto end_error;
+			}
+
+		default:
+			break;
+		}
+
+		git_buf_putc(&buf, (char)c);
+		c = line[++rpos];
+	} while (line + rpos < last_quote);
+
+end_parse:
+	if (git_buf_oom(&buf))
+		goto end_error;
+
+	if (line[rpos] != '"' || line[rpos + 1] != ']') {
+		set_parse_error(reader, rpos, "unexpected text after closing quotes");
+		git_buf_dispose(&buf);
+		return -1;
+	}
+
+	*section_name = git_buf_detach(&buf);
+	return (int)(&line[rpos + 2] - line_start); /* rpos is at the closing quote */
+
+end_error:
+	git_buf_dispose(&buf);
+
+	return -1;
+}
+
+static int parse_section_header(git_config_parser *reader, char **section_out)
+{
+	char *name, *name_end;
+	int name_length, c, pos;
+	int result;
+	char *line;
+	size_t line_len;
+
+	git_parse_advance_ws(&reader->ctx);
+	line = git__strndup(reader->ctx.line, reader->ctx.line_len);
+	if (line == NULL)
+		return -1;
+
+	/* find the end of the variable's name */
+	name_end = strrchr(line, ']');
+	if (name_end == NULL) {
+		git__free(line);
+		set_parse_error(reader, 0, "missing ']' in section header");
+		return -1;
+	}
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&line_len, (size_t)(name_end - line), 1);
+	name = git__malloc(line_len);
+	GIT_ERROR_CHECK_ALLOC(name);
+
+	name_length = 0;
+	pos = 0;
+
+	/* Make sure we were given a section header */
+	c = line[pos++];
+	assert(c == '[');
+
+	c = line[pos++];
+
+	do {
+		if (git__isspace(c)){
+			name[name_length] = '\0';
+			result = parse_subsection_header(reader, line, pos, name, section_out);
+			git__free(line);
+			git__free(name);
+			return result;
+		}
+
+		if (!config_keychar(c) && c != '.') {
+			set_parse_error(reader, pos, "unexpected character in header");
+			goto fail_parse;
+		}
+
+		name[name_length++] = (char)git__tolower(c);
+
+	} while ((c = line[pos++]) != ']');
+
+	if (line[pos - 1] != ']') {
+		set_parse_error(reader, pos, "unexpected end of file");
+		goto fail_parse;
+	}
+
+	git__free(line);
+
+	name[name_length] = 0;
+	*section_out = name;
+
+	return pos;
+
+fail_parse:
+	git__free(line);
+	git__free(name);
+	return -1;
+}
+
+static int skip_bom(git_parse_ctx *parser)
+{
+	git_buf buf = GIT_BUF_INIT_CONST(parser->content, parser->content_len);
+	git_bom_t bom;
+	int bom_offset = git_buf_text_detect_bom(&bom, &buf);
+
+	if (bom == GIT_BOM_UTF8)
+		git_parse_advance_chars(parser, bom_offset);
+
+	/* TODO: reference implementation is pretty stupid with BoM */
+
+	return 0;
+}
+
+/*
+	(* basic types *)
+	digit = "0".."9"
+	integer = digit { digit }
+	alphabet = "a".."z" + "A" .. "Z"
+
+	section_char = alphabet | "." | "-"
+	extension_char = (* any character except newline *)
+	any_char = (* any character *)
+	variable_char = "alphabet" | "-"
+
+
+	(* actual grammar *)
+	config = { section }
+
+	section = header { definition }
+
+	header = "[" section [subsection | subsection_ext] "]"
+
+	subsection = "." section
+	subsection_ext = "\"" extension "\""
+
+	section = section_char { section_char }
+	extension = extension_char { extension_char }
+
+	definition = variable_name ["=" variable_value] "\n"
+
+	variable_name = variable_char { variable_char }
+	variable_value = string | boolean | integer
+
+	string = quoted_string | plain_string
+	quoted_string = "\"" plain_string "\""
+	plain_string = { any_char }
+
+	boolean = boolean_true | boolean_false
+	boolean_true = "yes" | "1" | "true" | "on"
+	boolean_false = "no" | "0" | "false" | "off"
+*/
+
+/* '\"' -> '"' etc */
+static int unescape_line(
+	char **out, bool *is_multi, const char *ptr, int quote_count)
+{
+	char *str, *fixed, *esc;
+	size_t ptr_len = strlen(ptr), alloc_len;
+
+	*is_multi = false;
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloc_len, ptr_len, 1) ||
+		(str = git__malloc(alloc_len)) == NULL) {
+		return -1;
+	}
+
+	fixed = str;
+
+	while (*ptr != '\0') {
+		if (*ptr == '"') {
+			quote_count++;
+		} else if (*ptr != '\\') {
+			*fixed++ = *ptr;
+		} else {
+			/* backslash, check the next char */
+			ptr++;
+			/* if we're at the end, it's a multiline, so keep the backslash */
+			if (*ptr == '\0') {
+				*is_multi = true;
+				goto done;
+			}
+			if ((esc = strchr(git_config_escapes, *ptr)) != NULL) {
+				*fixed++ = git_config_escaped[esc - git_config_escapes];
+			} else {
+				git__free(str);
+				git_error_set(GIT_ERROR_CONFIG, "invalid escape at %s", ptr);
+				return -1;
+			}
+		}
+		ptr++;
+	}
+
+done:
+	*fixed = '\0';
+	*out = str;
+
+	return 0;
+}
+
+static int parse_multiline_variable(git_config_parser *reader, git_buf *value, int in_quotes)
+{
+	int quote_count;
+	bool multiline = true;
+
+	while (multiline) {
+		char *line = NULL, *proc_line = NULL;
+		int error;
+
+		/* Check that the next line exists */
+		git_parse_advance_line(&reader->ctx);
+		line = git__strndup(reader->ctx.line, reader->ctx.line_len);
+		GIT_ERROR_CHECK_ALLOC(line);
+
+		/*
+		 * We've reached the end of the file, there is no continuation.
+		 * (this is not an error).
+		 */
+		if (line[0] == '\0') {
+			error = 0;
+			goto out;
+		}
+
+		/* If it was just a comment, pretend it didn't exist */
+		quote_count = strip_comments(line, !!in_quotes);
+		if (line[0] == '\0')
+			goto next;
+
+		if ((error = unescape_line(&proc_line, &multiline,
+					   line, in_quotes)) < 0)
+			goto out;
+
+		/* Add this line to the multiline var */
+		if ((error = git_buf_puts(value, proc_line)) < 0)
+			goto out;
+
+next:
+		git__free(line);
+		git__free(proc_line);
+		in_quotes = quote_count;
+		continue;
+
+out:
+		git__free(line);
+		git__free(proc_line);
+		return error;
+	}
+
+	return 0;
+}
+
+GIT_INLINE(bool) is_namechar(char c)
+{
+	return isalnum(c) || c == '-';
+}
+
+static int parse_name(
+	char **name, const char **value, git_config_parser *reader, const char *line)
+{
+	const char *name_end = line, *value_start;
+
+	*name = NULL;
+	*value = NULL;
+
+	while (*name_end && is_namechar(*name_end))
+		name_end++;
+
+	if (line == name_end) {
+		set_parse_error(reader, 0, "invalid configuration key");
+		return -1;
+	}
+
+	value_start = name_end;
+
+	while (*value_start && git__isspace(*value_start))
+		value_start++;
+
+	if (*value_start == '=') {
+		*value = value_start + 1;
+	} else if (*value_start) {
+		set_parse_error(reader, 0, "invalid configuration key");
+		return -1;
+	}
+
+	if ((*name = git__strndup(line, name_end - line)) == NULL)
+		return -1;
+
+	return 0;
+}
+
+static int parse_variable(git_config_parser *reader, char **var_name, char **var_value)
+{
+	const char *value_start = NULL;
+	char *line = NULL, *name = NULL, *value = NULL;
+	int quote_count, error;
+	bool multiline;
+
+	*var_name = NULL;
+	*var_value = NULL;
+
+	git_parse_advance_ws(&reader->ctx);
+	line = git__strndup(reader->ctx.line, reader->ctx.line_len);
+	GIT_ERROR_CHECK_ALLOC(line);
+
+	quote_count = strip_comments(line, 0);
+
+	if ((error = parse_name(&name, &value_start, reader, line)) < 0)
+		goto out;
+
+	/*
+	 * Now, let's try to parse the value
+	 */
+	if (value_start != NULL) {
+		while (git__isspace(value_start[0]))
+			value_start++;
+
+		if ((error = unescape_line(&value, &multiline, value_start, 0)) < 0)
+			goto out;
+
+		if (multiline) {
+			git_buf multi_value = GIT_BUF_INIT;
+			git_buf_attach(&multi_value, value, 0);
+			value = NULL;
+
+			if (parse_multiline_variable(reader, &multi_value, quote_count) < 0 ||
+			    git_buf_oom(&multi_value)) {
+				error = -1;
+				git_buf_dispose(&multi_value);
+				goto out;
+			}
+
+			value = git_buf_detach(&multi_value);
+		}
+	}
+
+	*var_name = name;
+	*var_value = value;
+	name = NULL;
+	value = NULL;
+
+out:
+	git__free(name);
+	git__free(value);
+	git__free(line);
+	return error;
+}
+
+int git_config_parser_init(git_config_parser *out, const char *path, const char *data, size_t datalen)
+{
+	out->path = path;
+	return git_parse_ctx_init(&out->ctx, data, datalen);
+}
+
+void git_config_parser_dispose(git_config_parser *parser)
+{
+	git_parse_ctx_clear(&parser->ctx);
+}
+
+int git_config_parse(
+	git_config_parser *parser,
+	git_config_parser_section_cb on_section,
+	git_config_parser_variable_cb on_variable,
+	git_config_parser_comment_cb on_comment,
+	git_config_parser_eof_cb on_eof,
+	void *payload)
+{
+	git_parse_ctx *ctx;
+	char *current_section = NULL, *var_name = NULL, *var_value = NULL;
+	int result = 0;
+
+	ctx = &parser->ctx;
+
+	skip_bom(ctx);
+
+	for (; ctx->remain_len > 0; git_parse_advance_line(ctx)) {
+		const char *line_start;
+		size_t line_len;
+		char c;
+
+	restart:
+		line_start = ctx->line;
+		line_len = ctx->line_len;
+
+		/*
+		 * Get either first non-whitespace character or, if that does
+		 * not exist, the first whitespace character. This is required
+		 * to preserve whitespaces when writing back the file.
+		 */
+		if (git_parse_peek(&c, ctx, GIT_PARSE_PEEK_SKIP_WHITESPACE) < 0 &&
+		    git_parse_peek(&c, ctx, 0) < 0)
+			continue;
+
+		switch (c) {
+		case '[': /* section header, new section begins */
+			git__free(current_section);
+			current_section = NULL;
+
+			result = parse_section_header(parser, &current_section);
+			if (result < 0)
+				break;
+
+			git_parse_advance_chars(ctx, result);
+
+			if (on_section)
+				result = on_section(parser, current_section, line_start, line_len, payload);
+			/*
+			 * After we've parsed the section header we may not be
+			 * done with the line. If there's still data in there,
+			 * run the next loop with the rest of the current line
+			 * instead of moving forward.
+			 */
+
+			if (!git_parse_peek(&c, ctx, GIT_PARSE_PEEK_SKIP_WHITESPACE))
+				goto restart;
+
+			break;
+
+		case '\n': /* comment or whitespace-only */
+		case '\r':
+		case ' ':
+		case '\t':
+		case ';':
+		case '#':
+			if (on_comment) {
+				result = on_comment(parser, line_start, line_len, payload);
+			}
+			break;
+
+		default: /* assume variable declaration */
+			if ((result = parse_variable(parser, &var_name, &var_value)) == 0 && on_variable) {
+				result = on_variable(parser, current_section, var_name, var_value, line_start, line_len, payload);
+				git__free(var_name);
+				git__free(var_value);
+			}
+
+			break;
+		}
+
+		if (result < 0)
+			goto out;
+	}
+
+	if (on_eof)
+		result = on_eof(parser, current_section, payload);
+
+out:
+	git__free(current_section);
+	return result;
+}

node_modules/nodegit/vendor/libgit2/src/config_parse.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_config_parse_h__
+#define INCLUDE_config_parse_h__
+
+#include "common.h"
+
+#include "array.h"
+#include "futils.h"
+#include "oid.h"
+#include "parse.h"
+
+extern const char *git_config_escapes;
+extern const char *git_config_escaped;
+
+typedef struct {
+	const char *path;
+	git_parse_ctx ctx;
+} git_config_parser;
+
+#define GIT_CONFIG_PARSER_INIT { NULL, GIT_PARSE_CTX_INIT }
+
+typedef int (*git_config_parser_section_cb)(
+	git_config_parser *parser,
+	const char *current_section,
+	const char *line,
+	size_t line_len,
+	void *payload);
+
+typedef int (*git_config_parser_variable_cb)(
+	git_config_parser *parser,
+	const char *current_section,
+	const char *var_name,
+	const char *var_value,
+	const char *line,
+	size_t line_len,
+	void *payload);
+
+typedef int (*git_config_parser_comment_cb)(
+	git_config_parser *parser,
+	const char *line,
+	size_t line_len,
+	void *payload);
+
+typedef int (*git_config_parser_eof_cb)(
+	git_config_parser *parser,
+	const char *current_section,
+	void *payload);
+
+int git_config_parser_init(git_config_parser *out, const char *path, const char *data, size_t datalen);
+void git_config_parser_dispose(git_config_parser *parser);
+
+int git_config_parse(
+	git_config_parser *parser,
+	git_config_parser_section_cb on_section,
+	git_config_parser_variable_cb on_variable,
+	git_config_parser_comment_cb on_comment,
+	git_config_parser_eof_cb on_eof,
+	void *payload);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/config_snapshot.c

@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "config.h"
+
+#include "config_entries.h"
+
+typedef struct {
+	git_config_backend parent;
+	git_mutex values_mutex;
+	git_config_entries *entries;
+	git_config_backend *source;
+} config_snapshot_backend;
+
+static int config_error_readonly(void)
+{
+	git_error_set(GIT_ERROR_CONFIG, "this backend is read-only");
+	return -1;
+}
+
+static int config_snapshot_iterator(
+	git_config_iterator **iter,
+	struct git_config_backend *backend)
+{
+	config_snapshot_backend *b = GIT_CONTAINER_OF(backend, config_snapshot_backend, parent);
+	git_config_entries *entries = NULL;
+	int error;
+
+	if ((error = git_config_entries_dup(&entries, b->entries)) < 0 ||
+	    (error = git_config_entries_iterator_new(iter, entries)) < 0)
+		goto out;
+
+out:
+	/* Let iterator delete duplicated entries when it's done */
+	git_config_entries_free(entries);
+	return error;
+}
+
+/* release the map containing the entry as an equivalent to freeing it */
+static void config_snapshot_entry_free(git_config_entry *entry)
+{
+	git_config_entries *entries = (git_config_entries *) entry->payload;
+	git_config_entries_free(entries);
+}
+
+static int config_snapshot_get(git_config_backend *cfg, const char *key, git_config_entry **out)
+{
+	config_snapshot_backend *b = GIT_CONTAINER_OF(cfg, config_snapshot_backend, parent);
+	git_config_entries *entries = NULL;
+	git_config_entry *entry;
+	int error = 0;
+
+	if (git_mutex_lock(&b->values_mutex) < 0) {
+	    git_error_set(GIT_ERROR_OS, "failed to lock config backend");
+	    return -1;
+	}
+
+	entries = b->entries;
+	git_config_entries_incref(entries);
+	git_mutex_unlock(&b->values_mutex);
+
+	if ((error = (git_config_entries_get(&entry, entries, key))) < 0) {
+		git_config_entries_free(entries);
+		return error;
+	}
+
+	entry->free = config_snapshot_entry_free;
+	entry->payload = entries;
+	*out = entry;
+
+	return 0;
+}
+
+static int config_snapshot_set(git_config_backend *cfg, const char *name, const char *value)
+{
+	GIT_UNUSED(cfg);
+	GIT_UNUSED(name);
+	GIT_UNUSED(value);
+
+	return config_error_readonly();
+}
+
+static int config_snapshot_set_multivar(
+	git_config_backend *cfg, const char *name, const char *regexp, const char *value)
+{
+	GIT_UNUSED(cfg);
+	GIT_UNUSED(name);
+	GIT_UNUSED(regexp);
+	GIT_UNUSED(value);
+
+	return config_error_readonly();
+}
+
+static int config_snapshot_delete_multivar(git_config_backend *cfg, const char *name, const char *regexp)
+{
+	GIT_UNUSED(cfg);
+	GIT_UNUSED(name);
+	GIT_UNUSED(regexp);
+
+	return config_error_readonly();
+}
+
+static int config_snapshot_delete(git_config_backend *cfg, const char *name)
+{
+	GIT_UNUSED(cfg);
+	GIT_UNUSED(name);
+
+	return config_error_readonly();
+}
+
+static int config_snapshot_lock(git_config_backend *_cfg)
+{
+	GIT_UNUSED(_cfg);
+
+	return config_error_readonly();
+}
+
+static int config_snapshot_unlock(git_config_backend *_cfg, int success)
+{
+	GIT_UNUSED(_cfg);
+	GIT_UNUSED(success);
+
+	return config_error_readonly();
+}
+
+static void config_snapshot_free(git_config_backend *_backend)
+{
+	config_snapshot_backend *backend = GIT_CONTAINER_OF(_backend, config_snapshot_backend, parent);
+
+	if (backend == NULL)
+		return;
+
+	git_config_entries_free(backend->entries);
+	git_mutex_free(&backend->values_mutex);
+	git__free(backend);
+}
+
+static int config_snapshot_open(git_config_backend *cfg, git_config_level_t level, const git_repository *repo)
+{
+	config_snapshot_backend *b = GIT_CONTAINER_OF(cfg, config_snapshot_backend, parent);
+	git_config_entries *entries = NULL;
+	git_config_iterator *it = NULL;
+	git_config_entry *entry;
+	int error;
+
+	/* We're just copying data, don't care about the level or repo*/
+	GIT_UNUSED(level);
+	GIT_UNUSED(repo);
+
+	if ((error = git_config_entries_new(&entries)) < 0 ||
+	    (error = b->source->iterator(&it, b->source)) < 0)
+		goto out;
+
+	while ((error = git_config_next(&entry, it)) == 0)
+		if ((error = git_config_entries_dup_entry(entries, entry)) < 0)
+			goto out;
+
+	if (error < 0) {
+		if (error != GIT_ITEROVER)
+			goto out;
+		error = 0;
+	}
+
+	b->entries = entries;
+
+out:
+	git_config_iterator_free(it);
+	if (error)
+		git_config_entries_free(entries);
+	return error;
+}
+
+int git_config_backend_snapshot(git_config_backend **out, git_config_backend *source)
+{
+	config_snapshot_backend *backend;
+
+	backend = git__calloc(1, sizeof(config_snapshot_backend));
+	GIT_ERROR_CHECK_ALLOC(backend);
+
+	backend->parent.version = GIT_CONFIG_BACKEND_VERSION;
+	git_mutex_init(&backend->values_mutex);
+
+	backend->source = source;
+
+	backend->parent.readonly = 1;
+	backend->parent.version = GIT_CONFIG_BACKEND_VERSION;
+	backend->parent.open = config_snapshot_open;
+	backend->parent.get = config_snapshot_get;
+	backend->parent.set = config_snapshot_set;
+	backend->parent.set_multivar = config_snapshot_set_multivar;
+	backend->parent.snapshot = git_config_backend_snapshot;
+	backend->parent.del = config_snapshot_delete;
+	backend->parent.del_multivar = config_snapshot_delete_multivar;
+	backend->parent.iterator = config_snapshot_iterator;
+	backend->parent.lock = config_snapshot_lock;
+	backend->parent.unlock = config_snapshot_unlock;
+	backend->parent.free = config_snapshot_free;
+
+	*out = &backend->parent;
+
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/crlf.c

@@ -0,0 +1,413 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "git2/attr.h"
+#include "git2/blob.h"
+#include "git2/index.h"
+#include "git2/sys/filter.h"
+
+#include "futils.h"
+#include "hash.h"
+#include "filter.h"
+#include "buf_text.h"
+#include "repository.h"
+
+typedef enum {
+	GIT_CRLF_UNDEFINED,
+	GIT_CRLF_BINARY,
+	GIT_CRLF_TEXT,
+	GIT_CRLF_TEXT_INPUT,
+	GIT_CRLF_TEXT_CRLF,
+	GIT_CRLF_AUTO,
+	GIT_CRLF_AUTO_INPUT,
+	GIT_CRLF_AUTO_CRLF,
+} git_crlf_t;
+
+struct crlf_attrs {
+	int attr_action; /* the .gitattributes setting */
+	int crlf_action; /* the core.autocrlf setting */
+
+	int auto_crlf;
+	int safe_crlf;
+	int core_eol;
+};
+
+struct crlf_filter {
+	git_filter f;
+};
+
+static git_crlf_t check_crlf(const char *value)
+{
+	if (GIT_ATTR_IS_TRUE(value))
+		return GIT_CRLF_TEXT;
+	else if (GIT_ATTR_IS_FALSE(value))
+		return GIT_CRLF_BINARY;
+	else if (GIT_ATTR_IS_UNSPECIFIED(value))
+		;
+	else if (strcmp(value, "input") == 0)
+		return GIT_CRLF_TEXT_INPUT;
+	else if (strcmp(value, "auto") == 0)
+		return GIT_CRLF_AUTO;
+
+	return GIT_CRLF_UNDEFINED;
+}
+
+static git_configmap_value check_eol(const char *value)
+{
+	if (GIT_ATTR_IS_UNSPECIFIED(value))
+		;
+	else if (strcmp(value, "lf") == 0)
+		return GIT_EOL_LF;
+	else if (strcmp(value, "crlf") == 0)
+		return GIT_EOL_CRLF;
+
+	return GIT_EOL_UNSET;
+}
+
+static int has_cr_in_index(const git_filter_source *src)
+{
+	git_repository *repo = git_filter_source_repo(src);
+	const char *path = git_filter_source_path(src);
+	git_index *index;
+	const git_index_entry *entry;
+	git_blob *blob;
+	const void *blobcontent;
+	git_object_size_t blobsize;
+	bool found_cr;
+
+	if (!path)
+		return false;
+
+	if (git_repository_index__weakptr(&index, repo) < 0) {
+		git_error_clear();
+		return false;
+	}
+
+	if (!(entry = git_index_get_bypath(index, path, 0)) &&
+		!(entry = git_index_get_bypath(index, path, 1)))
+		return false;
+
+	if (!S_ISREG(entry->mode)) /* don't crlf filter non-blobs */
+		return true;
+
+	if (git_blob_lookup(&blob, repo, &entry->id) < 0)
+		return false;
+
+	blobcontent = git_blob_rawcontent(blob);
+	blobsize    = git_blob_rawsize(blob);
+	if (!git__is_sizet(blobsize))
+		blobsize = (size_t)-1;
+
+	found_cr = (blobcontent != NULL &&
+		blobsize > 0 &&
+		memchr(blobcontent, '\r', (size_t)blobsize) != NULL);
+
+	git_blob_free(blob);
+	return found_cr;
+}
+
+static int text_eol_is_crlf(struct crlf_attrs *ca)
+{
+	if (ca->auto_crlf == GIT_AUTO_CRLF_TRUE)
+		return 1;
+	else if (ca->auto_crlf == GIT_AUTO_CRLF_INPUT)
+		return 0;
+
+	if (ca->core_eol == GIT_EOL_CRLF)
+		return 1;
+	if (ca->core_eol == GIT_EOL_UNSET && GIT_EOL_NATIVE == GIT_EOL_CRLF)
+		return 1;
+
+	return 0;
+}
+
+static git_configmap_value output_eol(struct crlf_attrs *ca)
+{
+	switch (ca->crlf_action) {
+	case GIT_CRLF_BINARY:
+		return GIT_EOL_UNSET;
+	case GIT_CRLF_TEXT_CRLF:
+		return GIT_EOL_CRLF;
+	case GIT_CRLF_TEXT_INPUT:
+		return GIT_EOL_LF;
+	case GIT_CRLF_UNDEFINED:
+	case GIT_CRLF_AUTO_CRLF:
+		return GIT_EOL_CRLF;
+	case GIT_CRLF_AUTO_INPUT:
+		return GIT_EOL_LF;
+	case GIT_CRLF_TEXT:
+	case GIT_CRLF_AUTO:
+		return text_eol_is_crlf(ca) ? GIT_EOL_CRLF : GIT_EOL_LF;
+	}
+
+	/* TODO: warn when available */
+	return ca->core_eol;
+}
+
+GIT_INLINE(int) check_safecrlf(
+	struct crlf_attrs *ca,
+	const git_filter_source *src,
+	git_buf_text_stats *stats)
+{
+	const char *filename = git_filter_source_path(src);
+
+	if (!ca->safe_crlf)
+		return 0;
+
+	if (output_eol(ca) == GIT_EOL_LF) {
+		/*
+		 * CRLFs would not be restored by checkout:
+		 * check if we'd remove CRLFs
+		 */
+		if (stats->crlf) {
+			if (ca->safe_crlf == GIT_SAFE_CRLF_WARN) {
+				/* TODO: issue a warning when available */
+			} else {
+				if (filename && *filename)
+					git_error_set(
+						GIT_ERROR_FILTER, "CRLF would be replaced by LF in '%s'",
+						filename);
+				else
+					git_error_set(
+						GIT_ERROR_FILTER, "CRLF would be replaced by LF");
+
+				return -1;
+			}
+		}
+	} else if (output_eol(ca) == GIT_EOL_CRLF) {
+		/*
+		 * CRLFs would be added by checkout:
+		 * check if we have "naked" LFs
+		 */
+		if (stats->crlf != stats->lf) {
+			if (ca->safe_crlf == GIT_SAFE_CRLF_WARN) {
+				/* TODO: issue a warning when available */
+			} else {
+				if (filename && *filename)
+					git_error_set(
+						GIT_ERROR_FILTER, "LF would be replaced by CRLF in '%s'",
+						filename);
+				else
+					git_error_set(
+						GIT_ERROR_FILTER, "LF would be replaced by CRLF");
+
+				return -1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int crlf_apply_to_odb(
+	struct crlf_attrs *ca,
+	git_buf *to,
+	const git_buf *from,
+	const git_filter_source *src)
+{
+	git_buf_text_stats stats;
+	bool is_binary;
+	int error;
+
+	/* Binary attribute? Empty file? Nothing to do */
+	if (ca->crlf_action == GIT_CRLF_BINARY || !git_buf_len(from))
+		return GIT_PASSTHROUGH;
+
+	is_binary = git_buf_text_gather_stats(&stats, from, false);
+
+	/* Heuristics to see if we can skip the conversion.
+	 * Straight from Core Git.
+	 */
+	if (ca->crlf_action == GIT_CRLF_AUTO ||
+		ca->crlf_action == GIT_CRLF_AUTO_INPUT ||
+		ca->crlf_action == GIT_CRLF_AUTO_CRLF) {
+
+		if (is_binary)
+			return GIT_PASSTHROUGH;
+
+		/*
+		 * If the file in the index has any CR in it, do not convert.
+		 * This is the new safer autocrlf handling.
+		 */
+		if (has_cr_in_index(src))
+			return GIT_PASSTHROUGH;
+	}
+
+	if ((error = check_safecrlf(ca, src, &stats)) < 0)
+		return error;
+
+	/* If there are no CR characters to filter out, then just pass */
+	if (!stats.crlf)
+		return GIT_PASSTHROUGH;
+
+	/* Actually drop the carriage returns */
+	return git_buf_text_crlf_to_lf(to, from);
+}
+
+static int crlf_apply_to_workdir(
+	struct crlf_attrs *ca,
+	git_buf *to,
+	const git_buf *from)
+{
+	git_buf_text_stats stats;
+	bool is_binary;
+
+	/* Empty file? Nothing to do. */
+	if (git_buf_len(from) == 0 || output_eol(ca) != GIT_EOL_CRLF)
+		return GIT_PASSTHROUGH;
+
+	is_binary = git_buf_text_gather_stats(&stats, from, false);
+
+	/* If there are no LFs, or all LFs are part of a CRLF, nothing to do */
+	if (stats.lf == 0 || stats.lf == stats.crlf)
+		return GIT_PASSTHROUGH;
+
+	if (ca->crlf_action == GIT_CRLF_AUTO ||
+		ca->crlf_action == GIT_CRLF_AUTO_INPUT ||
+		ca->crlf_action == GIT_CRLF_AUTO_CRLF) {
+
+		/* If we have any existing CR or CRLF line endings, do nothing */
+		if (stats.cr > 0)
+			return GIT_PASSTHROUGH;
+
+		/* Don't filter binary files */
+		if (is_binary)
+			return GIT_PASSTHROUGH;
+	}
+
+	return git_buf_text_lf_to_crlf(to, from);
+}
+
+static int convert_attrs(
+	struct crlf_attrs *ca,
+	const char **attr_values,
+	const git_filter_source *src)
+{
+	int error;
+
+	memset(ca, 0, sizeof(struct crlf_attrs));
+
+	if ((error = git_repository__configmap_lookup(&ca->auto_crlf,
+		 git_filter_source_repo(src), GIT_CONFIGMAP_AUTO_CRLF)) < 0 ||
+		(error = git_repository__configmap_lookup(&ca->safe_crlf,
+		 git_filter_source_repo(src), GIT_CONFIGMAP_SAFE_CRLF)) < 0 ||
+		(error = git_repository__configmap_lookup(&ca->core_eol,
+		 git_filter_source_repo(src), GIT_CONFIGMAP_EOL)) < 0)
+		return error;
+
+	/* downgrade FAIL to WARN if ALLOW_UNSAFE option is used */
+	if ((git_filter_source_flags(src) & GIT_FILTER_ALLOW_UNSAFE) &&
+		ca->safe_crlf == GIT_SAFE_CRLF_FAIL)
+		ca->safe_crlf = GIT_SAFE_CRLF_WARN;
+
+	if (attr_values) {
+		/* load the text attribute */
+		ca->crlf_action = check_crlf(attr_values[2]); /* text */
+
+		if (ca->crlf_action == GIT_CRLF_UNDEFINED)
+			ca->crlf_action = check_crlf(attr_values[0]); /* crlf */
+
+		if (ca->crlf_action != GIT_CRLF_BINARY) {
+			/* load the eol attribute */
+			int eol_attr = check_eol(attr_values[1]);
+
+			if (ca->crlf_action == GIT_CRLF_AUTO && eol_attr == GIT_EOL_LF)
+				ca->crlf_action = GIT_CRLF_AUTO_INPUT;
+			else if (ca->crlf_action == GIT_CRLF_AUTO && eol_attr == GIT_EOL_CRLF)
+				ca->crlf_action = GIT_CRLF_AUTO_CRLF;
+			else if (eol_attr == GIT_EOL_LF)
+				ca->crlf_action = GIT_CRLF_TEXT_INPUT;
+			else if (eol_attr == GIT_EOL_CRLF)
+				ca->crlf_action = GIT_CRLF_TEXT_CRLF;
+		}
+
+		ca->attr_action = ca->crlf_action;
+	} else {
+		ca->crlf_action = GIT_CRLF_UNDEFINED;
+	}
+
+	if (ca->crlf_action == GIT_CRLF_TEXT)
+		ca->crlf_action = text_eol_is_crlf(ca) ? GIT_CRLF_TEXT_CRLF : GIT_CRLF_TEXT_INPUT;
+	if (ca->crlf_action == GIT_CRLF_UNDEFINED && ca->auto_crlf == GIT_AUTO_CRLF_FALSE)
+		ca->crlf_action = GIT_CRLF_BINARY;
+	if (ca->crlf_action == GIT_CRLF_UNDEFINED && ca->auto_crlf == GIT_AUTO_CRLF_TRUE)
+		ca->crlf_action = GIT_CRLF_AUTO_CRLF;
+	if (ca->crlf_action == GIT_CRLF_UNDEFINED && ca->auto_crlf == GIT_AUTO_CRLF_INPUT)
+		ca->crlf_action = GIT_CRLF_AUTO_INPUT;
+
+	return 0;
+}
+
+static int crlf_check(
+	git_filter *self,
+	void **payload, /* points to NULL ptr on entry, may be set */
+	const git_filter_source *src,
+	const char **attr_values)
+{
+	struct crlf_attrs ca;
+
+	GIT_UNUSED(self);
+
+	convert_attrs(&ca, attr_values, src);
+
+	if (ca.crlf_action == GIT_CRLF_BINARY)
+		return GIT_PASSTHROUGH;
+
+	*payload = git__malloc(sizeof(ca));
+	GIT_ERROR_CHECK_ALLOC(*payload);
+	memcpy(*payload, &ca, sizeof(ca));
+
+	return 0;
+}
+
+static int crlf_apply(
+	git_filter *self,
+	void **payload, /* may be read and/or set */
+	git_buf *to,
+	const git_buf *from,
+	const git_filter_source *src)
+{
+	/* initialize payload in case `check` was bypassed */
+	if (!*payload) {
+		int error = crlf_check(self, payload, src, NULL);
+
+		if (error < 0)
+			return error;
+	}
+
+	if (git_filter_source_mode(src) == GIT_FILTER_SMUDGE)
+		return crlf_apply_to_workdir(*payload, to, from);
+	else
+		return crlf_apply_to_odb(*payload, to, from, src);
+}
+
+static void crlf_cleanup(
+	git_filter *self,
+	void       *payload)
+{
+	GIT_UNUSED(self);
+	git__free(payload);
+}
+
+git_filter *git_crlf_filter_new(void)
+{
+	struct crlf_filter *f = git__calloc(1, sizeof(struct crlf_filter));
+	if (f == NULL)
+		return NULL;
+
+	f->f.version = GIT_FILTER_VERSION;
+	f->f.attributes = "crlf eol text";
+	f->f.initialize = NULL;
+	f->f.shutdown = git_filter_free;
+	f->f.check    = crlf_check;
+	f->f.apply    = crlf_apply;
+	f->f.cleanup  = crlf_cleanup;
+
+	return (git_filter *)f;
+}

node_modules/nodegit/vendor/libgit2/src/date.c

@@ -0,0 +1,904 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+
+#include "common.h"
+
+#ifndef GIT_WIN32
+#include <sys/time.h>
+#endif
+
+#include "util.h"
+#include "cache.h"
+#include "posix.h"
+
+#include <ctype.h>
+#include <time.h>
+
+typedef enum {
+	DATE_NORMAL = 0,
+	DATE_RELATIVE,
+	DATE_SHORT,
+	DATE_LOCAL,
+	DATE_ISO8601,
+	DATE_RFC2822,
+	DATE_RAW
+} date_mode;
+
+/*
+ * This is like mktime, but without normalization of tm_wday and tm_yday.
+ */
+static git_time_t tm_to_time_t(const struct tm *tm)
+{
+	static const int mdays[] = {
+	    0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+	};
+	int year = tm->tm_year - 70;
+	int month = tm->tm_mon;
+	int day = tm->tm_mday;
+
+	if (year < 0 || year > 129) /* algo only works for 1970-2099 */
+		return -1;
+	if (month < 0 || month > 11) /* array bounds */
+		return -1;
+	if (month < 2 || (year + 2) % 4)
+		day--;
+	if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0)
+		return -1;
+	return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL +
+		tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec;
+}
+
+static const char *month_names[] = {
+	"January", "February", "March", "April", "May", "June",
+	"July", "August", "September", "October", "November", "December"
+};
+
+static const char *weekday_names[] = {
+	"Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays"
+};
+
+
+
+/*
+ * Check these. And note how it doesn't do the summer-time conversion.
+ *
+ * In my world, it's always summer, and things are probably a bit off
+ * in other ways too.
+ */
+static const struct {
+	const char *name;
+	int offset;
+	int dst;
+} timezone_names[] = {
+	{ "IDLW", -12, 0, },	/* International Date Line West */
+	{ "NT",   -11, 0, },	/* Nome */
+	{ "CAT",  -10, 0, },	/* Central Alaska */
+	{ "HST",  -10, 0, },	/* Hawaii Standard */
+	{ "HDT",  -10, 1, },	/* Hawaii Daylight */
+	{ "YST",   -9, 0, },	/* Yukon Standard */
+	{ "YDT",   -9, 1, },	/* Yukon Daylight */
+	{ "PST",   -8, 0, },	/* Pacific Standard */
+	{ "PDT",   -8, 1, },	/* Pacific Daylight */
+	{ "MST",   -7, 0, },	/* Mountain Standard */
+	{ "MDT",   -7, 1, },	/* Mountain Daylight */
+	{ "CST",   -6, 0, },	/* Central Standard */
+	{ "CDT",   -6, 1, },	/* Central Daylight */
+	{ "EST",   -5, 0, },	/* Eastern Standard */
+	{ "EDT",   -5, 1, },	/* Eastern Daylight */
+	{ "AST",   -3, 0, },	/* Atlantic Standard */
+	{ "ADT",   -3, 1, },	/* Atlantic Daylight */
+	{ "WAT",   -1, 0, },	/* West Africa */
+
+	{ "GMT",    0, 0, },	/* Greenwich Mean */
+	{ "UTC",    0, 0, },	/* Universal (Coordinated) */
+	{ "Z",      0, 0, },    /* Zulu, alias for UTC */
+
+	{ "WET",    0, 0, },	/* Western European */
+	{ "BST",    0, 1, },	/* British Summer */
+	{ "CET",   +1, 0, },	/* Central European */
+	{ "MET",   +1, 0, },	/* Middle European */
+	{ "MEWT",  +1, 0, },	/* Middle European Winter */
+	{ "MEST",  +1, 1, },	/* Middle European Summer */
+	{ "CEST",  +1, 1, },	/* Central European Summer */
+	{ "MESZ",  +1, 1, },	/* Middle European Summer */
+	{ "FWT",   +1, 0, },	/* French Winter */
+	{ "FST",   +1, 1, },	/* French Summer */
+	{ "EET",   +2, 0, },	/* Eastern Europe */
+	{ "EEST",  +2, 1, },	/* Eastern European Daylight */
+	{ "WAST",  +7, 0, },	/* West Australian Standard */
+	{ "WADT",  +7, 1, },	/* West Australian Daylight */
+	{ "CCT",   +8, 0, },	/* China Coast */
+	{ "JST",   +9, 0, },	/* Japan Standard */
+	{ "EAST", +10, 0, },	/* Eastern Australian Standard */
+	{ "EADT", +10, 1, },	/* Eastern Australian Daylight */
+	{ "GST",  +10, 0, },	/* Guam Standard */
+	{ "NZT",  +12, 0, },	/* New Zealand */
+	{ "NZST", +12, 0, },	/* New Zealand Standard */
+	{ "NZDT", +12, 1, },	/* New Zealand Daylight */
+	{ "IDLE", +12, 0, },	/* International Date Line East */
+};
+
+static size_t match_string(const char *date, const char *str)
+{
+	size_t i = 0;
+
+	for (i = 0; *date; date++, str++, i++) {
+		if (*date == *str)
+			continue;
+		if (toupper(*date) == toupper(*str))
+			continue;
+		if (!isalnum(*date))
+			break;
+		return 0;
+	}
+	return i;
+}
+
+static int skip_alpha(const char *date)
+{
+	int i = 0;
+	do {
+		i++;
+	} while (isalpha(date[i]));
+	return i;
+}
+
+/*
+* Parse month, weekday, or timezone name
+*/
+static size_t match_alpha(const char *date, struct tm *tm, int *offset)
+{
+	unsigned int i;
+
+	for (i = 0; i < 12; i++) {
+		size_t match = match_string(date, month_names[i]);
+		if (match >= 3) {
+			tm->tm_mon = i;
+			return match;
+		}
+	}
+
+	for (i = 0; i < 7; i++) {
+		size_t match = match_string(date, weekday_names[i]);
+		if (match >= 3) {
+			tm->tm_wday = i;
+			return match;
+		}
+	}
+
+	for (i = 0; i < ARRAY_SIZE(timezone_names); i++) {
+		size_t match = match_string(date, timezone_names[i].name);
+		if (match >= 3 || match == strlen(timezone_names[i].name)) {
+			int off = timezone_names[i].offset;
+
+			/* This is bogus, but we like summer */
+			off += timezone_names[i].dst;
+
+			/* Only use the tz name offset if we don't have anything better */
+			if (*offset == -1)
+				*offset = 60*off;
+
+			return match;
+		}
+	}
+
+	if (match_string(date, "PM") == 2) {
+		tm->tm_hour = (tm->tm_hour % 12) + 12;
+		return 2;
+	}
+
+	if (match_string(date, "AM") == 2) {
+		tm->tm_hour = (tm->tm_hour % 12) + 0;
+		return 2;
+	}
+
+	/* BAD */
+	return skip_alpha(date);
+}
+
+static int is_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm)
+{
+	if (month > 0 && month < 13 && day > 0 && day < 32) {
+		struct tm check = *tm;
+		struct tm *r = (now_tm ? &check : tm);
+		time_t specified;
+
+		r->tm_mon = month - 1;
+		r->tm_mday = day;
+		if (year == -1) {
+			if (!now_tm)
+				return 1;
+			r->tm_year = now_tm->tm_year;
+		}
+		else if (year >= 1970 && year < 2100)
+			r->tm_year = year - 1900;
+		else if (year > 70 && year < 100)
+			r->tm_year = year;
+		else if (year < 38)
+			r->tm_year = year + 100;
+		else
+			return 0;
+		if (!now_tm)
+			return 1;
+
+		specified = tm_to_time_t(r);
+
+		/* Be it commit time or author time, it does not make
+		 * sense to specify timestamp way into the future.  Make
+		 * sure it is not later than ten days from now...
+		 */
+		if (now + 10*24*3600 < specified)
+			return 0;
+		tm->tm_mon = r->tm_mon;
+		tm->tm_mday = r->tm_mday;
+		if (year != -1)
+			tm->tm_year = r->tm_year;
+		return 1;
+	}
+	return 0;
+}
+
+static size_t match_multi_number(unsigned long num, char c, const char *date, char *end, struct tm *tm)
+{
+	time_t now;
+	struct tm now_tm;
+	struct tm *refuse_future;
+	long num2, num3;
+
+	num2 = strtol(end+1, &end, 10);
+	num3 = -1;
+	if (*end == c && isdigit(end[1]))
+		num3 = strtol(end+1, &end, 10);
+
+	/* Time? Date? */
+	switch (c) {
+	case ':':
+		if (num3 < 0)
+			num3 = 0;
+		if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) {
+			tm->tm_hour = num;
+			tm->tm_min = num2;
+			tm->tm_sec = num3;
+			break;
+		}
+		return 0;
+
+	case '-':
+	case '/':
+	case '.':
+		now = time(NULL);
+		refuse_future = NULL;
+		if (p_gmtime_r(&now, &now_tm))
+			refuse_future = &now_tm;
+
+		if (num > 70) {
+			/* yyyy-mm-dd? */
+			if (is_date(num, num2, num3, refuse_future, now, tm))
+				break;
+			/* yyyy-dd-mm? */
+			if (is_date(num, num3, num2, refuse_future, now, tm))
+				break;
+		}
+		/* Our eastern European friends say dd.mm.yy[yy]
+		 * is the norm there, so giving precedence to
+		 * mm/dd/yy[yy] form only when separator is not '.'
+		 */
+		if (c != '.' &&
+		    is_date(num3, num, num2, refuse_future, now, tm))
+			break;
+		/* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */
+		if (is_date(num3, num2, num, refuse_future, now, tm))
+			break;
+		/* Funny European mm.dd.yy */
+		if (c == '.' &&
+		    is_date(num3, num, num2, refuse_future, now, tm))
+			break;
+		return 0;
+	}
+	return end - date;
+}
+
+/*
+ * Have we filled in any part of the time/date yet?
+ * We just do a binary 'and' to see if the sign bit
+ * is set in all the values.
+ */
+static int nodate(struct tm *tm)
+{
+	return (tm->tm_year &
+		tm->tm_mon &
+		tm->tm_mday &
+		tm->tm_hour &
+		tm->tm_min &
+		tm->tm_sec) < 0;
+}
+
+/*
+ * We've seen a digit. Time? Year? Date?
+ */
+static size_t match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt)
+{
+	size_t n;
+	char *end;
+	unsigned long num;
+
+	num = strtoul(date, &end, 10);
+
+	/*
+	 * Seconds since 1970? We trigger on that for any numbers with
+	 * more than 8 digits. This is because we don't want to rule out
+	 * numbers like 20070606 as a YYYYMMDD date.
+	 */
+	if (num >= 100000000 && nodate(tm)) {
+		time_t time = num;
+		if (p_gmtime_r(&time, tm)) {
+			*tm_gmt = 1;
+			return end - date;
+		}
+	}
+
+	/*
+	 * Check for special formats: num[-.:/]num[same]num
+	 */
+	switch (*end) {
+	case ':':
+	case '.':
+	case '/':
+	case '-':
+		if (isdigit(end[1])) {
+			size_t match = match_multi_number(num, *end, date, end, tm);
+			if (match)
+				return match;
+		}
+	}
+
+	/*
+	 * None of the special formats? Try to guess what
+	 * the number meant. We use the number of digits
+	 * to make a more educated guess..
+	 */
+	n = 0;
+	do {
+		n++;
+	} while (isdigit(date[n]));
+
+	/* Four-digit year or a timezone? */
+	if (n == 4) {
+		if (num <= 1400 && *offset == -1) {
+			unsigned int minutes = num % 100;
+			unsigned int hours = num / 100;
+			*offset = hours*60 + minutes;
+		} else if (num > 1900 && num < 2100)
+			tm->tm_year = num - 1900;
+		return n;
+	}
+
+	/*
+	 * Ignore lots of numerals. We took care of 4-digit years above.
+	 * Days or months must be one or two digits.
+	 */
+	if (n > 2)
+		return n;
+
+	/*
+	 * NOTE! We will give precedence to day-of-month over month or
+	 * year numbers in the 1-12 range. So 05 is always "mday 5",
+	 * unless we already have a mday..
+	 *
+	 * IOW, 01 Apr 05 parses as "April 1st, 2005".
+	 */
+	if (num > 0 && num < 32 && tm->tm_mday < 0) {
+		tm->tm_mday = num;
+		return n;
+	}
+
+	/* Two-digit year? */
+	if (n == 2 && tm->tm_year < 0) {
+		if (num < 10 && tm->tm_mday >= 0) {
+			tm->tm_year = num + 100;
+			return n;
+		}
+		if (num >= 70) {
+			tm->tm_year = num;
+			return n;
+		}
+	}
+
+	if (num > 0 && num < 13 && tm->tm_mon < 0)
+		tm->tm_mon = num-1;
+
+	return n;
+}
+
+static size_t match_tz(const char *date, int *offp)
+{
+	char *end;
+	int hour = strtoul(date + 1, &end, 10);
+	size_t n = end - (date + 1);
+	int min = 0;
+
+	if (n == 4) {
+		/* hhmm */
+		min = hour % 100;
+		hour = hour / 100;
+	} else if (n != 2) {
+		min = 99; /* random stuff */
+	} else if (*end == ':') {
+		/* hh:mm? */
+		min = strtoul(end + 1, &end, 10);
+		if (end - (date + 1) != 5)
+			min = 99; /* random stuff */
+	} /* otherwise we parsed "hh" */
+
+	/*
+	 * Don't accept any random stuff. Even though some places have
+	 * offset larger than 12 hours (e.g. Pacific/Kiritimati is at
+	 * UTC+14), there is something wrong if hour part is much
+	 * larger than that. We might also want to check that the
+	 * minutes are divisible by 15 or something too. (Offset of
+	 * Kathmandu, Nepal is UTC+5:45)
+	 */
+	if (min < 60 && hour < 24) {
+		int offset = hour * 60 + min;
+		if (*date == '-')
+			offset = -offset;
+		*offp = offset;
+	}
+	return end - date;
+}
+
+/*
+ * Parse a string like "0 +0000" as ancient timestamp near epoch, but
+ * only when it appears not as part of any other string.
+ */
+static int match_object_header_date(const char *date, git_time_t *timestamp, int *offset)
+{
+	char *end;
+	unsigned long stamp;
+	int ofs;
+
+	if (*date < '0' || '9' <= *date)
+		return -1;
+	stamp = strtoul(date, &end, 10);
+	if (*end != ' ' || stamp == ULONG_MAX || (end[1] != '+' && end[1] != '-'))
+		return -1;
+	date = end + 2;
+	ofs = strtol(date, &end, 10);
+	if ((*end != '\0' && (*end != '\n')) || end != date + 4)
+		return -1;
+	ofs = (ofs / 100) * 60 + (ofs % 100);
+	if (date[-1] == '-')
+		ofs = -ofs;
+	*timestamp = stamp;
+	*offset = ofs;
+	return 0;
+}
+
+/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
+   (i.e. English) day/month names, and it doesn't work correctly with %z. */
+static int parse_date_basic(const char *date, git_time_t *timestamp, int *offset)
+{
+	struct tm tm;
+	int tm_gmt;
+	git_time_t dummy_timestamp;
+	int dummy_offset;
+
+	if (!timestamp)
+		timestamp = &dummy_timestamp;
+	if (!offset)
+		offset = &dummy_offset;
+
+	memset(&tm, 0, sizeof(tm));
+	tm.tm_year = -1;
+	tm.tm_mon = -1;
+	tm.tm_mday = -1;
+	tm.tm_isdst = -1;
+	tm.tm_hour = -1;
+	tm.tm_min = -1;
+	tm.tm_sec = -1;
+	*offset = -1;
+	tm_gmt = 0;
+
+	if (*date == '@' &&
+	    !match_object_header_date(date + 1, timestamp, offset))
+		return 0; /* success */
+	for (;;) {
+		size_t match = 0;
+		unsigned char c = *date;
+
+		/* Stop at end of string or newline */
+		if (!c || c == '\n')
+			break;
+
+		if (isalpha(c))
+			match = match_alpha(date, &tm, offset);
+		else if (isdigit(c))
+			match = match_digit(date, &tm, offset, &tm_gmt);
+		else if ((c == '-' || c == '+') && isdigit(date[1]))
+			match = match_tz(date, offset);
+
+		if (!match) {
+			/* BAD */
+			match = 1;
+		}
+
+		date += match;
+	}
+
+	/* mktime uses local timezone */
+	*timestamp = tm_to_time_t(&tm);
+	if (*offset == -1)
+		*offset = (int)((time_t)*timestamp - mktime(&tm)) / 60;
+
+	if (*timestamp == (git_time_t)-1)
+		return -1;
+
+	if (!tm_gmt)
+		*timestamp -= *offset * 60;
+	return 0; /* success */
+}
+
+
+/*
+ * Relative time update (eg "2 days ago").  If we haven't set the time
+ * yet, we need to set it from current time.
+ */
+static git_time_t update_tm(struct tm *tm, struct tm *now, unsigned long sec)
+{
+	time_t n;
+
+	if (tm->tm_mday < 0)
+		tm->tm_mday = now->tm_mday;
+	if (tm->tm_mon < 0)
+		tm->tm_mon = now->tm_mon;
+	if (tm->tm_year < 0) {
+		tm->tm_year = now->tm_year;
+		if (tm->tm_mon > now->tm_mon)
+			tm->tm_year--;
+	}
+
+	n = mktime(tm) - sec;
+	p_localtime_r(&n, tm);
+	return n;
+}
+
+static void date_now(struct tm *tm, struct tm *now, int *num)
+{
+   GIT_UNUSED(num);
+	update_tm(tm, now, 0);
+}
+
+static void date_yesterday(struct tm *tm, struct tm *now, int *num)
+{
+   GIT_UNUSED(num);
+	update_tm(tm, now, 24*60*60);
+}
+
+static void date_time(struct tm *tm, struct tm *now, int hour)
+{
+	if (tm->tm_hour < hour)
+		date_yesterday(tm, now, NULL);
+	tm->tm_hour = hour;
+	tm->tm_min = 0;
+	tm->tm_sec = 0;
+}
+
+static void date_midnight(struct tm *tm, struct tm *now, int *num)
+{
+   GIT_UNUSED(num);
+	date_time(tm, now, 0);
+}
+
+static void date_noon(struct tm *tm, struct tm *now, int *num)
+{
+   GIT_UNUSED(num);
+	date_time(tm, now, 12);
+}
+
+static void date_tea(struct tm *tm, struct tm *now, int *num)
+{
+   GIT_UNUSED(num);
+	date_time(tm, now, 17);
+}
+
+static void date_pm(struct tm *tm, struct tm *now, int *num)
+{
+	int hour, n = *num;
+	*num = 0;
+   GIT_UNUSED(now);
+
+	hour = tm->tm_hour;
+	if (n) {
+		hour = n;
+		tm->tm_min = 0;
+		tm->tm_sec = 0;
+	}
+	tm->tm_hour = (hour % 12) + 12;
+}
+
+static void date_am(struct tm *tm, struct tm *now, int *num)
+{
+	int hour, n = *num;
+	*num = 0;
+   GIT_UNUSED(now);
+
+	hour = tm->tm_hour;
+	if (n) {
+		hour = n;
+		tm->tm_min = 0;
+		tm->tm_sec = 0;
+	}
+	tm->tm_hour = (hour % 12);
+}
+
+static void date_never(struct tm *tm, struct tm *now, int *num)
+{
+	time_t n = 0;
+   GIT_UNUSED(now);
+   GIT_UNUSED(num);
+	p_localtime_r(&n, tm);
+}
+
+static const struct special {
+	const char *name;
+	void (*fn)(struct tm *, struct tm *, int *);
+} special[] = {
+	{ "yesterday", date_yesterday },
+	{ "noon", date_noon },
+	{ "midnight", date_midnight },
+	{ "tea", date_tea },
+	{ "PM", date_pm },
+	{ "AM", date_am },
+	{ "never", date_never },
+	{ "now", date_now },
+	{ NULL }
+};
+
+static const char *number_name[] = {
+	"zero", "one", "two", "three", "four",
+	"five", "six", "seven", "eight", "nine", "ten",
+};
+
+static const struct typelen {
+	const char *type;
+	int length;
+} typelen[] = {
+	{ "seconds", 1 },
+	{ "minutes", 60 },
+	{ "hours", 60*60 },
+	{ "days", 24*60*60 },
+	{ "weeks", 7*24*60*60 },
+	{ NULL }
+};
+
+static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched)
+{
+	const struct typelen *tl;
+	const struct special *s;
+	const char *end = date;
+	int i;
+
+	while (isalpha(*++end))
+		/* scan to non-alpha */;
+
+	for (i = 0; i < 12; i++) {
+		size_t match = match_string(date, month_names[i]);
+		if (match >= 3) {
+			tm->tm_mon = i;
+			*touched = 1;
+			return end;
+		}
+	}
+
+	for (s = special; s->name; s++) {
+		size_t len = strlen(s->name);
+		if (match_string(date, s->name) == len) {
+			s->fn(tm, now, num);
+			*touched = 1;
+			return end;
+		}
+	}
+
+	if (!*num) {
+		for (i = 1; i < 11; i++) {
+			size_t len = strlen(number_name[i]);
+			if (match_string(date, number_name[i]) == len) {
+				*num = i;
+				*touched = 1;
+				return end;
+			}
+		}
+		if (match_string(date, "last") == 4) {
+			*num = 1;
+			*touched = 1;
+		}
+		return end;
+	}
+
+	tl = typelen;
+	while (tl->type) {
+		size_t len = strlen(tl->type);
+		if (match_string(date, tl->type) >= len-1) {
+			update_tm(tm, now, tl->length * *num);
+			*num = 0;
+			*touched = 1;
+			return end;
+		}
+		tl++;
+	}
+
+	for (i = 0; i < 7; i++) {
+		size_t match = match_string(date, weekday_names[i]);
+		if (match >= 3) {
+			int diff, n = *num -1;
+			*num = 0;
+
+			diff = tm->tm_wday - i;
+			if (diff <= 0)
+				n++;
+			diff += 7*n;
+
+			update_tm(tm, now, diff * 24 * 60 * 60);
+			*touched = 1;
+			return end;
+		}
+	}
+
+	if (match_string(date, "months") >= 5) {
+		int n;
+		update_tm(tm, now, 0); /* fill in date fields if needed */
+		n = tm->tm_mon - *num;
+		*num = 0;
+		while (n < 0) {
+			n += 12;
+			tm->tm_year--;
+		}
+		tm->tm_mon = n;
+		*touched = 1;
+		return end;
+	}
+
+	if (match_string(date, "years") >= 4) {
+		update_tm(tm, now, 0); /* fill in date fields if needed */
+		tm->tm_year -= *num;
+		*num = 0;
+		*touched = 1;
+		return end;
+	}
+
+	return end;
+}
+
+static const char *approxidate_digit(const char *date, struct tm *tm, int *num)
+{
+	char *end;
+	unsigned long number = strtoul(date, &end, 10);
+
+	switch (*end) {
+	case ':':
+	case '.':
+	case '/':
+	case '-':
+		if (isdigit(end[1])) {
+			size_t match = match_multi_number(number, *end, date, end, tm);
+			if (match)
+				return date + match;
+		}
+	}
+
+	/* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */
+	if (date[0] != '0' || end - date <= 2)
+		*num = number;
+	return end;
+}
+
+/*
+ * Do we have a pending number at the end, or when
+ * we see a new one? Let's assume it's a month day,
+ * as in "Dec 6, 1992"
+ */
+static void pending_number(struct tm *tm, int *num)
+{
+	int number = *num;
+
+	if (number) {
+		*num = 0;
+		if (tm->tm_mday < 0 && number < 32)
+			tm->tm_mday = number;
+		else if (tm->tm_mon < 0 && number < 13)
+			tm->tm_mon = number-1;
+		else if (tm->tm_year < 0) {
+			if (number > 1969 && number < 2100)
+				tm->tm_year = number - 1900;
+			else if (number > 69 && number < 100)
+				tm->tm_year = number;
+			else if (number < 38)
+				tm->tm_year = 100 + number;
+			/* We mess up for number = 00 ? */
+		}
+	}
+}
+
+static git_time_t approxidate_str(const char *date,
+	time_t time_sec,
+	int *error_ret)
+{
+	int number = 0;
+	int touched = 0;
+	struct tm tm = {0}, now;
+
+	p_localtime_r(&time_sec, &tm);
+	now = tm;
+
+	tm.tm_year = -1;
+	tm.tm_mon = -1;
+	tm.tm_mday = -1;
+
+	for (;;) {
+		unsigned char c = *date;
+		if (!c)
+			break;
+		date++;
+		if (isdigit(c)) {
+			pending_number(&tm, &number);
+			date = approxidate_digit(date-1, &tm, &number);
+			touched = 1;
+			continue;
+		}
+		if (isalpha(c))
+			date = approxidate_alpha(date-1, &tm, &now, &number, &touched);
+	}
+	pending_number(&tm, &number);
+	if (!touched)
+		*error_ret = 1;
+	return update_tm(&tm, &now, 0);
+}
+
+int git__date_parse(git_time_t *out, const char *date)
+{
+	time_t time_sec;
+	git_time_t timestamp;
+	int offset, error_ret=0;
+
+	if (!parse_date_basic(date, &timestamp, &offset)) {
+		*out = timestamp;
+		return 0;
+	}
+
+	if (time(&time_sec) == -1)
+		return -1;
+
+	*out = approxidate_str(date, time_sec, &error_ret);
+   return error_ret;
+}
+
+int git__date_rfc2822_fmt(char *out, size_t len, const git_time *date)
+{
+	int written;
+	struct tm gmt;
+	time_t t;
+
+	assert(out && date);
+
+	t = (time_t) (date->time + date->offset * 60);
+
+	if (p_gmtime_r (&t, &gmt) == NULL)
+		return -1;
+
+	written = p_snprintf(out, len, "%.3s, %u %.3s %.4u %02u:%02u:%02u %+03d%02d",
+		weekday_names[gmt.tm_wday],
+		gmt.tm_mday,
+		month_names[gmt.tm_mon],
+		gmt.tm_year + 1900,
+		gmt.tm_hour, gmt.tm_min, gmt.tm_sec,
+		date->offset / 60, date->offset % 60);
+
+	if (written < 0 || (written > (int) len - 1))
+		return -1;
+
+	return 0;
+}
+

node_modules/nodegit/vendor/libgit2/src/delta.c

@@ -0,0 +1,628 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "delta.h"
+
+/* maximum hash entry list for the same hash bucket */
+#define HASH_LIMIT 64
+
+#define RABIN_SHIFT 23
+#define RABIN_WINDOW 16
+
+static const unsigned int T[256] = {
+	0x00000000, 0xab59b4d1, 0x56b369a2, 0xfdeadd73, 0x063f6795, 0xad66d344,
+	0x508c0e37, 0xfbd5bae6, 0x0c7ecf2a, 0xa7277bfb, 0x5acda688, 0xf1941259,
+	0x0a41a8bf, 0xa1181c6e, 0x5cf2c11d, 0xf7ab75cc, 0x18fd9e54, 0xb3a42a85,
+	0x4e4ef7f6, 0xe5174327, 0x1ec2f9c1, 0xb59b4d10, 0x48719063, 0xe32824b2,
+	0x1483517e, 0xbfdae5af, 0x423038dc, 0xe9698c0d, 0x12bc36eb, 0xb9e5823a,
+	0x440f5f49, 0xef56eb98, 0x31fb3ca8, 0x9aa28879, 0x6748550a, 0xcc11e1db,
+	0x37c45b3d, 0x9c9defec, 0x6177329f, 0xca2e864e, 0x3d85f382, 0x96dc4753,
+	0x6b369a20, 0xc06f2ef1, 0x3bba9417, 0x90e320c6, 0x6d09fdb5, 0xc6504964,
+	0x2906a2fc, 0x825f162d, 0x7fb5cb5e, 0xd4ec7f8f, 0x2f39c569, 0x846071b8,
+	0x798aaccb, 0xd2d3181a, 0x25786dd6, 0x8e21d907, 0x73cb0474, 0xd892b0a5,
+	0x23470a43, 0x881ebe92, 0x75f463e1, 0xdeadd730, 0x63f67950, 0xc8afcd81,
+	0x354510f2, 0x9e1ca423, 0x65c91ec5, 0xce90aa14, 0x337a7767, 0x9823c3b6,
+	0x6f88b67a, 0xc4d102ab, 0x393bdfd8, 0x92626b09, 0x69b7d1ef, 0xc2ee653e,
+	0x3f04b84d, 0x945d0c9c, 0x7b0be704, 0xd05253d5, 0x2db88ea6, 0x86e13a77,
+	0x7d348091, 0xd66d3440, 0x2b87e933, 0x80de5de2, 0x7775282e, 0xdc2c9cff,
+	0x21c6418c, 0x8a9ff55d, 0x714a4fbb, 0xda13fb6a, 0x27f92619, 0x8ca092c8,
+	0x520d45f8, 0xf954f129, 0x04be2c5a, 0xafe7988b, 0x5432226d, 0xff6b96bc,
+	0x02814bcf, 0xa9d8ff1e, 0x5e738ad2, 0xf52a3e03, 0x08c0e370, 0xa39957a1,
+	0x584ced47, 0xf3155996, 0x0eff84e5, 0xa5a63034, 0x4af0dbac, 0xe1a96f7d,
+	0x1c43b20e, 0xb71a06df, 0x4ccfbc39, 0xe79608e8, 0x1a7cd59b, 0xb125614a,
+	0x468e1486, 0xedd7a057, 0x103d7d24, 0xbb64c9f5, 0x40b17313, 0xebe8c7c2,
+	0x16021ab1, 0xbd5bae60, 0x6cb54671, 0xc7ecf2a0, 0x3a062fd3, 0x915f9b02,
+	0x6a8a21e4, 0xc1d39535, 0x3c394846, 0x9760fc97, 0x60cb895b, 0xcb923d8a,
+	0x3678e0f9, 0x9d215428, 0x66f4eece, 0xcdad5a1f, 0x3047876c, 0x9b1e33bd,
+	0x7448d825, 0xdf116cf4, 0x22fbb187, 0x89a20556, 0x7277bfb0, 0xd92e0b61,
+	0x24c4d612, 0x8f9d62c3, 0x7836170f, 0xd36fa3de, 0x2e857ead, 0x85dcca7c,
+	0x7e09709a, 0xd550c44b, 0x28ba1938, 0x83e3ade9, 0x5d4e7ad9, 0xf617ce08,
+	0x0bfd137b, 0xa0a4a7aa, 0x5b711d4c, 0xf028a99d, 0x0dc274ee, 0xa69bc03f,
+	0x5130b5f3, 0xfa690122, 0x0783dc51, 0xacda6880, 0x570fd266, 0xfc5666b7,
+	0x01bcbbc4, 0xaae50f15, 0x45b3e48d, 0xeeea505c, 0x13008d2f, 0xb85939fe,
+	0x438c8318, 0xe8d537c9, 0x153feaba, 0xbe665e6b, 0x49cd2ba7, 0xe2949f76,
+	0x1f7e4205, 0xb427f6d4, 0x4ff24c32, 0xe4abf8e3, 0x19412590, 0xb2189141,
+	0x0f433f21, 0xa41a8bf0, 0x59f05683, 0xf2a9e252, 0x097c58b4, 0xa225ec65,
+	0x5fcf3116, 0xf49685c7, 0x033df00b, 0xa86444da, 0x558e99a9, 0xfed72d78,
+	0x0502979e, 0xae5b234f, 0x53b1fe3c, 0xf8e84aed, 0x17bea175, 0xbce715a4,
+	0x410dc8d7, 0xea547c06, 0x1181c6e0, 0xbad87231, 0x4732af42, 0xec6b1b93,
+	0x1bc06e5f, 0xb099da8e, 0x4d7307fd, 0xe62ab32c, 0x1dff09ca, 0xb6a6bd1b,
+	0x4b4c6068, 0xe015d4b9, 0x3eb80389, 0x95e1b758, 0x680b6a2b, 0xc352defa,
+	0x3887641c, 0x93ded0cd, 0x6e340dbe, 0xc56db96f, 0x32c6cca3, 0x999f7872,
+	0x6475a501, 0xcf2c11d0, 0x34f9ab36, 0x9fa01fe7, 0x624ac294, 0xc9137645,
+	0x26459ddd, 0x8d1c290c, 0x70f6f47f, 0xdbaf40ae, 0x207afa48, 0x8b234e99,
+	0x76c993ea, 0xdd90273b, 0x2a3b52f7, 0x8162e626, 0x7c883b55, 0xd7d18f84,
+	0x2c043562, 0x875d81b3, 0x7ab75cc0, 0xd1eee811
+};
+
+static const unsigned int U[256] = {
+	0x00000000, 0x7eb5200d, 0x5633f4cb, 0x2886d4c6, 0x073e5d47, 0x798b7d4a,
+	0x510da98c, 0x2fb88981, 0x0e7cba8e, 0x70c99a83, 0x584f4e45, 0x26fa6e48,
+	0x0942e7c9, 0x77f7c7c4, 0x5f711302, 0x21c4330f, 0x1cf9751c, 0x624c5511,
+	0x4aca81d7, 0x347fa1da, 0x1bc7285b, 0x65720856, 0x4df4dc90, 0x3341fc9d,
+	0x1285cf92, 0x6c30ef9f, 0x44b63b59, 0x3a031b54, 0x15bb92d5, 0x6b0eb2d8,
+	0x4388661e, 0x3d3d4613, 0x39f2ea38, 0x4747ca35, 0x6fc11ef3, 0x11743efe,
+	0x3eccb77f, 0x40799772, 0x68ff43b4, 0x164a63b9, 0x378e50b6, 0x493b70bb,
+	0x61bda47d, 0x1f088470, 0x30b00df1, 0x4e052dfc, 0x6683f93a, 0x1836d937,
+	0x250b9f24, 0x5bbebf29, 0x73386bef, 0x0d8d4be2, 0x2235c263, 0x5c80e26e,
+	0x740636a8, 0x0ab316a5, 0x2b7725aa, 0x55c205a7, 0x7d44d161, 0x03f1f16c,
+	0x2c4978ed, 0x52fc58e0, 0x7a7a8c26, 0x04cfac2b, 0x73e5d470, 0x0d50f47d,
+	0x25d620bb, 0x5b6300b6, 0x74db8937, 0x0a6ea93a, 0x22e87dfc, 0x5c5d5df1,
+	0x7d996efe, 0x032c4ef3, 0x2baa9a35, 0x551fba38, 0x7aa733b9, 0x041213b4,
+	0x2c94c772, 0x5221e77f, 0x6f1ca16c, 0x11a98161, 0x392f55a7, 0x479a75aa,
+	0x6822fc2b, 0x1697dc26, 0x3e1108e0, 0x40a428ed, 0x61601be2, 0x1fd53bef,
+	0x3753ef29, 0x49e6cf24, 0x665e46a5, 0x18eb66a8, 0x306db26e, 0x4ed89263,
+	0x4a173e48, 0x34a21e45, 0x1c24ca83, 0x6291ea8e, 0x4d29630f, 0x339c4302,
+	0x1b1a97c4, 0x65afb7c9, 0x446b84c6, 0x3adea4cb, 0x1258700d, 0x6ced5000,
+	0x4355d981, 0x3de0f98c, 0x15662d4a, 0x6bd30d47, 0x56ee4b54, 0x285b6b59,
+	0x00ddbf9f, 0x7e689f92, 0x51d01613, 0x2f65361e, 0x07e3e2d8, 0x7956c2d5,
+	0x5892f1da, 0x2627d1d7, 0x0ea10511, 0x7014251c, 0x5facac9d, 0x21198c90,
+	0x099f5856, 0x772a785b, 0x4c921c31, 0x32273c3c, 0x1aa1e8fa, 0x6414c8f7,
+	0x4bac4176, 0x3519617b, 0x1d9fb5bd, 0x632a95b0, 0x42eea6bf, 0x3c5b86b2,
+	0x14dd5274, 0x6a687279, 0x45d0fbf8, 0x3b65dbf5, 0x13e30f33, 0x6d562f3e,
+	0x506b692d, 0x2ede4920, 0x06589de6, 0x78edbdeb, 0x5755346a, 0x29e01467,
+	0x0166c0a1, 0x7fd3e0ac, 0x5e17d3a3, 0x20a2f3ae, 0x08242768, 0x76910765,
+	0x59298ee4, 0x279caee9, 0x0f1a7a2f, 0x71af5a22, 0x7560f609, 0x0bd5d604,
+	0x235302c2, 0x5de622cf, 0x725eab4e, 0x0ceb8b43, 0x246d5f85, 0x5ad87f88,
+	0x7b1c4c87, 0x05a96c8a, 0x2d2fb84c, 0x539a9841, 0x7c2211c0, 0x029731cd,
+	0x2a11e50b, 0x54a4c506, 0x69998315, 0x172ca318, 0x3faa77de, 0x411f57d3,
+	0x6ea7de52, 0x1012fe5f, 0x38942a99, 0x46210a94, 0x67e5399b, 0x19501996,
+	0x31d6cd50, 0x4f63ed5d, 0x60db64dc, 0x1e6e44d1, 0x36e89017, 0x485db01a,
+	0x3f77c841, 0x41c2e84c, 0x69443c8a, 0x17f11c87, 0x38499506, 0x46fcb50b,
+	0x6e7a61cd, 0x10cf41c0, 0x310b72cf, 0x4fbe52c2, 0x67388604, 0x198da609,
+	0x36352f88, 0x48800f85, 0x6006db43, 0x1eb3fb4e, 0x238ebd5d, 0x5d3b9d50,
+	0x75bd4996, 0x0b08699b, 0x24b0e01a, 0x5a05c017, 0x728314d1, 0x0c3634dc,
+	0x2df207d3, 0x534727de, 0x7bc1f318, 0x0574d315, 0x2acc5a94, 0x54797a99,
+	0x7cffae5f, 0x024a8e52, 0x06852279, 0x78300274, 0x50b6d6b2, 0x2e03f6bf,
+	0x01bb7f3e, 0x7f0e5f33, 0x57888bf5, 0x293dabf8, 0x08f998f7, 0x764cb8fa,
+	0x5eca6c3c, 0x207f4c31, 0x0fc7c5b0, 0x7172e5bd, 0x59f4317b, 0x27411176,
+	0x1a7c5765, 0x64c97768, 0x4c4fa3ae, 0x32fa83a3, 0x1d420a22, 0x63f72a2f,
+	0x4b71fee9, 0x35c4dee4, 0x1400edeb, 0x6ab5cde6, 0x42331920, 0x3c86392d,
+	0x133eb0ac, 0x6d8b90a1, 0x450d4467, 0x3bb8646a
+};
+
+struct index_entry {
+	const unsigned char *ptr;
+	unsigned int val;
+	struct index_entry *next;
+};
+
+struct git_delta_index {
+	unsigned long memsize;
+	const void *src_buf;
+	size_t src_size;
+	unsigned int hash_mask;
+	struct index_entry *hash[GIT_FLEX_ARRAY];
+};
+
+static int lookup_index_alloc(
+	void **out, unsigned long *out_len, size_t entries, size_t hash_count)
+{
+	size_t entries_len, hash_len, index_len;
+
+	GIT_ERROR_CHECK_ALLOC_MULTIPLY(&entries_len, entries, sizeof(struct index_entry));
+	GIT_ERROR_CHECK_ALLOC_MULTIPLY(&hash_len, hash_count, sizeof(struct index_entry *));
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&index_len, sizeof(struct git_delta_index), entries_len);
+	GIT_ERROR_CHECK_ALLOC_ADD(&index_len, index_len, hash_len);
+
+	if (!git__is_ulong(index_len)) {
+		git_error_set(GIT_ERROR_NOMEMORY, "overly large delta");
+		return -1;
+	}
+
+	*out = git__malloc(index_len);
+	GIT_ERROR_CHECK_ALLOC(*out);
+
+	*out_len = (unsigned long)index_len;
+	return 0;
+}
+
+int git_delta_index_init(
+	git_delta_index **out, const void *buf, size_t bufsize)
+{
+	unsigned int i, hsize, hmask, entries, prev_val, *hash_count;
+	const unsigned char *data, *buffer = buf;
+	struct git_delta_index *index;
+	struct index_entry *entry, **hash;
+	void *mem;
+	unsigned long memsize;
+
+	*out = NULL;
+
+	if (!buf || !bufsize)
+		return 0;
+
+	/* Determine index hash size.  Note that indexing skips the
+	   first byte to allow for optimizing the rabin polynomial
+	   initialization in create_delta(). */
+	entries = (unsigned int)(bufsize - 1) / RABIN_WINDOW;
+	if (bufsize >= 0xffffffffUL) {
+		/*
+		 * Current delta format can't encode offsets into
+		 * reference buffer with more than 32 bits.
+		 */
+		entries = 0xfffffffeU / RABIN_WINDOW;
+	}
+	hsize = entries / 4;
+	for (i = 4; i < 31 && (1u << i) < hsize; i++);
+	hsize = 1 << i;
+	hmask = hsize - 1;
+
+	if (lookup_index_alloc(&mem, &memsize, entries, hsize) < 0)
+		return -1;
+
+	index = mem;
+	mem = index->hash;
+	hash = mem;
+	mem = hash + hsize;
+	entry = mem;
+
+	index->memsize = memsize;
+	index->src_buf = buf;
+	index->src_size = bufsize;
+	index->hash_mask = hmask;
+	memset(hash, 0, hsize * sizeof(*hash));
+
+	/* allocate an array to count hash entries */
+	hash_count = git__calloc(hsize, sizeof(*hash_count));
+	if (!hash_count) {
+		git__free(index);
+		return -1;
+	}
+
+	/* then populate the index */
+	prev_val = ~0;
+	for (data = buffer + entries * RABIN_WINDOW - RABIN_WINDOW;
+	     data >= buffer;
+	     data -= RABIN_WINDOW) {
+		unsigned int val = 0;
+		for (i = 1; i <= RABIN_WINDOW; i++)
+			val = ((val << 8) | data[i]) ^ T[val >> RABIN_SHIFT];
+		if (val == prev_val) {
+			/* keep the lowest of consecutive identical blocks */
+			entry[-1].ptr = data + RABIN_WINDOW;
+		} else {
+			prev_val = val;
+			i = val & hmask;
+			entry->ptr = data + RABIN_WINDOW;
+			entry->val = val;
+			entry->next = hash[i];
+			hash[i] = entry++;
+			hash_count[i]++;
+		}
+	}
+
+	/*
+	 * Determine a limit on the number of entries in the same hash
+	 * bucket.  This guard us against patological data sets causing
+	 * really bad hash distribution with most entries in the same hash
+	 * bucket that would bring us to O(m*n) computing costs (m and n
+	 * corresponding to reference and target buffer sizes).
+	 *
+	 * Make sure none of the hash buckets has more entries than
+	 * we're willing to test.  Otherwise we cull the entry list
+	 * uniformly to still preserve a good repartition across
+	 * the reference buffer.
+	 */
+	for (i = 0; i < hsize; i++) {
+		if (hash_count[i] < HASH_LIMIT)
+			continue;
+
+		entry = hash[i];
+		do {
+			struct index_entry *keep = entry;
+			int skip = hash_count[i] / HASH_LIMIT / 2;
+			do {
+				entry = entry->next;
+			} while(--skip && entry);
+			keep->next = entry;
+		} while (entry);
+	}
+	git__free(hash_count);
+
+	*out = index;
+	return 0;
+}
+
+void git_delta_index_free(git_delta_index *index)
+{
+	git__free(index);
+}
+
+size_t git_delta_index_size(git_delta_index *index)
+{
+	assert(index);
+
+	return index->memsize;
+}
+
+/*
+ * The maximum size for any opcode sequence, including the initial header
+ * plus rabin window plus biggest copy.
+ */
+#define MAX_OP_SIZE	(5 + 5 + 1 + RABIN_WINDOW + 7)
+
+int git_delta_create_from_index(
+	void **out,
+	size_t *out_len,
+	const struct git_delta_index *index,
+	const void *trg_buf,
+	size_t trg_size,
+	size_t max_size)
+{
+	unsigned int i, bufpos, bufsize, moff, msize, val;
+	int inscnt;
+	const unsigned char *ref_data, *ref_top, *data, *top;
+	unsigned char *buf;
+
+	*out = NULL;
+	*out_len = 0;
+
+	if (!trg_buf || !trg_size)
+		return 0;
+
+	if (index->src_size > UINT_MAX ||
+	    trg_size > UINT_MAX ||
+	    max_size > (UINT_MAX - MAX_OP_SIZE - 1)) {
+		git_error_set(GIT_ERROR_INVALID, "buffer sizes too large for delta processing");
+		return -1;
+	}
+
+	bufpos = 0;
+	bufsize = 8192;
+	if (max_size && bufsize >= max_size)
+		bufsize = (unsigned int)(max_size + MAX_OP_SIZE + 1);
+	buf = git__malloc(bufsize);
+	GIT_ERROR_CHECK_ALLOC(buf);
+
+	/* store reference buffer size */
+	i = (unsigned int)index->src_size;
+	while (i >= 0x80) {
+		buf[bufpos++] = i | 0x80;
+		i >>= 7;
+	}
+	buf[bufpos++] = i;
+
+	/* store target buffer size */
+	i = (unsigned int)trg_size;
+	while (i >= 0x80) {
+		buf[bufpos++] = i | 0x80;
+		i >>= 7;
+	}
+	buf[bufpos++] = i;
+
+	ref_data = index->src_buf;
+	ref_top = ref_data + index->src_size;
+	data = trg_buf;
+	top = (const unsigned char *) trg_buf + trg_size;
+
+	bufpos++;
+	val = 0;
+	for (i = 0; i < RABIN_WINDOW && data < top; i++, data++) {
+		buf[bufpos++] = *data;
+		val = ((val << 8) | *data) ^ T[val >> RABIN_SHIFT];
+	}
+	inscnt = i;
+
+	moff = 0;
+	msize = 0;
+	while (data < top) {
+		if (msize < 4096) {
+			struct index_entry *entry;
+			val ^= U[data[-RABIN_WINDOW]];
+			val = ((val << 8) | *data) ^ T[val >> RABIN_SHIFT];
+			i = val & index->hash_mask;
+			for (entry = index->hash[i]; entry; entry = entry->next) {
+				const unsigned char *ref = entry->ptr;
+				const unsigned char *src = data;
+				unsigned int ref_size = (unsigned int)(ref_top - ref);
+				if (entry->val != val)
+					continue;
+				if (ref_size > (unsigned int)(top - src))
+					ref_size = (unsigned int)(top - src);
+				if (ref_size <= msize)
+					break;
+				while (ref_size-- && *src++ == *ref)
+					ref++;
+				if (msize < (unsigned int)(ref - entry->ptr)) {
+					/* this is our best match so far */
+					msize = (unsigned int)(ref - entry->ptr);
+					moff = (unsigned int)(entry->ptr - ref_data);
+					if (msize >= 4096) /* good enough */
+						break;
+				}
+			}
+		}
+
+		if (msize < 4) {
+			if (!inscnt)
+				bufpos++;
+			buf[bufpos++] = *data++;
+			inscnt++;
+			if (inscnt == 0x7f) {
+				buf[bufpos - inscnt - 1] = inscnt;
+				inscnt = 0;
+			}
+			msize = 0;
+		} else {
+			unsigned int left;
+			unsigned char *op;
+
+			if (inscnt) {
+				while (moff && ref_data[moff-1] == data[-1]) {
+					/* we can match one byte back */
+					msize++;
+					moff--;
+					data--;
+					bufpos--;
+					if (--inscnt)
+						continue;
+					bufpos--;  /* remove count slot */
+					inscnt--;  /* make it -1 */
+					break;
+				}
+				buf[bufpos - inscnt - 1] = inscnt;
+				inscnt = 0;
+			}
+
+			/* A copy op is currently limited to 64KB (pack v2) */
+			left = (msize < 0x10000) ? 0 : (msize - 0x10000);
+			msize -= left;
+
+			op = buf + bufpos++;
+			i = 0x80;
+
+			if (moff & 0x000000ff)
+				buf[bufpos++] = moff >> 0,  i |= 0x01;
+			if (moff & 0x0000ff00)
+				buf[bufpos++] = moff >> 8,  i |= 0x02;
+			if (moff & 0x00ff0000)
+				buf[bufpos++] = moff >> 16, i |= 0x04;
+			if (moff & 0xff000000)
+				buf[bufpos++] = moff >> 24, i |= 0x08;
+
+			if (msize & 0x00ff)
+				buf[bufpos++] = msize >> 0, i |= 0x10;
+			if (msize & 0xff00)
+				buf[bufpos++] = msize >> 8, i |= 0x20;
+
+			*op = i;
+
+			data += msize;
+			moff += msize;
+			msize = left;
+
+			if (msize < 4096) {
+				int j;
+				val = 0;
+				for (j = -RABIN_WINDOW; j < 0; j++)
+					val = ((val << 8) | data[j])
+					      ^ T[val >> RABIN_SHIFT];
+			}
+		}
+
+		if (bufpos >= bufsize - MAX_OP_SIZE) {
+			void *tmp = buf;
+			bufsize = bufsize * 3 / 2;
+			if (max_size && bufsize >= max_size)
+				bufsize = (unsigned int)(max_size + MAX_OP_SIZE + 1);
+			if (max_size && bufpos > max_size)
+				break;
+			buf = git__realloc(buf, bufsize);
+			if (!buf) {
+				git__free(tmp);
+				return -1;
+			}
+		}
+	}
+
+	if (inscnt)
+		buf[bufpos - inscnt - 1] = inscnt;
+
+	if (max_size && bufpos > max_size) {
+		git_error_set(GIT_ERROR_NOMEMORY, "delta would be larger than maximum size");
+		git__free(buf);
+		return GIT_EBUFS;
+	}
+
+	*out_len = bufpos;
+	*out = buf;
+	return 0;
+}
+
+/*
+* Delta application was heavily cribbed from BinaryDelta.java in JGit, which
+* itself was heavily cribbed from <code>patch-delta.c</code> in the
+* GIT project.	The original delta patching code was written by
+* Nicolas Pitre <nico@cam.org>.
+*/
+
+static int hdr_sz(
+	size_t *size,
+	const unsigned char **delta,
+	const unsigned char *end)
+{
+	const unsigned char *d = *delta;
+	size_t r = 0;
+	unsigned int c, shift = 0;
+
+	do {
+		if (d == end) {
+			git_error_set(GIT_ERROR_INVALID, "truncated delta");
+			return -1;
+		}
+
+		c = *d++;
+		r |= (c & 0x7f) << shift;
+		shift += 7;
+	} while (c & 0x80);
+	*delta = d;
+	*size = r;
+	return 0;
+}
+
+int git_delta_read_header(
+	size_t *base_out,
+	size_t *result_out,
+	const unsigned char *delta,
+	size_t delta_len)
+{
+	const unsigned char *delta_end = delta + delta_len;
+	if ((hdr_sz(base_out, &delta, delta_end) < 0) ||
+		(hdr_sz(result_out, &delta, delta_end) < 0))
+		return -1;
+	return 0;
+}
+
+#define DELTA_HEADER_BUFFER_LEN 16
+int git_delta_read_header_fromstream(
+	size_t *base_sz, size_t *res_sz, git_packfile_stream *stream)
+{
+	static const size_t buffer_len = DELTA_HEADER_BUFFER_LEN;
+	unsigned char buffer[DELTA_HEADER_BUFFER_LEN];
+	const unsigned char *delta, *delta_end;
+	size_t len;
+	ssize_t read;
+
+	len = read = 0;
+	while (len < buffer_len) {
+		read = git_packfile_stream_read(stream, &buffer[len], buffer_len - len);
+
+		if (read == 0)
+			break;
+
+		if (read == GIT_EBUFS)
+			continue;
+
+		len += read;
+	}
+
+	delta = buffer;
+	delta_end = delta + len;
+	if ((hdr_sz(base_sz, &delta, delta_end) < 0) ||
+		(hdr_sz(res_sz, &delta, delta_end) < 0))
+		return -1;
+
+	return 0;
+}
+
+int git_delta_apply(
+	void **out,
+	size_t *out_len,
+	const unsigned char *base,
+	size_t base_len,
+	const unsigned char *delta,
+	size_t delta_len)
+{
+	const unsigned char *delta_end = delta + delta_len;
+	size_t base_sz, res_sz, alloc_sz;
+	unsigned char *res_dp;
+
+	*out = NULL;
+	*out_len = 0;
+
+	/*
+	 * Check that the base size matches the data we were given;
+	 * if not we would underflow while accessing data from the
+	 * base object, resulting in data corruption or segfault.
+	 */
+	if ((hdr_sz(&base_sz, &delta, delta_end) < 0) || (base_sz != base_len)) {
+		git_error_set(GIT_ERROR_INVALID, "failed to apply delta: base size does not match given data");
+		return -1;
+	}
+
+	if (hdr_sz(&res_sz, &delta, delta_end) < 0) {
+		git_error_set(GIT_ERROR_INVALID, "failed to apply delta: base size does not match given data");
+		return -1;
+	}
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloc_sz, res_sz, 1);
+	res_dp = git__malloc(alloc_sz);
+	GIT_ERROR_CHECK_ALLOC(res_dp);
+
+	res_dp[res_sz] = '\0';
+	*out = res_dp;
+	*out_len = res_sz;
+
+	while (delta < delta_end) {
+		unsigned char cmd = *delta++;
+		if (cmd & 0x80) {
+			/* cmd is a copy instruction; copy from the base. */
+			size_t off = 0, len = 0, end;
+
+#define ADD_DELTA(o, shift) { if (delta < delta_end) (o) |= ((unsigned) *delta++ << shift); else goto fail; }
+			if (cmd & 0x01) ADD_DELTA(off, 0UL);
+			if (cmd & 0x02) ADD_DELTA(off, 8UL);
+			if (cmd & 0x04) ADD_DELTA(off, 16UL);
+			if (cmd & 0x08) ADD_DELTA(off, 24UL);
+
+			if (cmd & 0x10) ADD_DELTA(len, 0UL);
+			if (cmd & 0x20) ADD_DELTA(len, 8UL);
+			if (cmd & 0x40) ADD_DELTA(len, 16UL);
+			if (!len)       len = 0x10000;
+#undef ADD_DELTA
+
+			if (GIT_ADD_SIZET_OVERFLOW(&end, off, len) ||
+			    base_len < end || res_sz < len)
+				goto fail;
+
+			memcpy(res_dp, base + off, len);
+			res_dp += len;
+			res_sz -= len;
+
+		} else if (cmd) {
+			/*
+			 * cmd is a literal insert instruction; copy from
+			 * the delta stream itself.
+			 */
+			if (delta_end - delta < cmd || res_sz < cmd)
+				goto fail;
+			memcpy(res_dp, delta, cmd);
+			delta += cmd;
+			res_dp += cmd;
+			res_sz -= cmd;
+
+		} else {
+			/* cmd == 0 is reserved for future encodings. */
+			goto fail;
+		}
+	}
+
+	if (delta != delta_end || res_sz)
+		goto fail;
+	return 0;
+
+fail:
+	git__free(*out);
+
+	*out = NULL;
+	*out_len = 0;
+
+	git_error_set(GIT_ERROR_INVALID, "failed to apply delta");
+	return -1;
+}

node_modules/nodegit/vendor/libgit2/src/delta.h

@@ -0,0 +1,136 @@
+/*
+ * diff-delta code taken from git.git. See diff-delta.c for details.
+ *
+ */
+#ifndef INCLUDE_git_delta_h__
+#define INCLUDE_git_delta_h__
+
+#include "common.h"
+
+#include "pack.h"
+
+typedef struct git_delta_index git_delta_index;
+
+/*
+ * git_delta_index_init: compute index data from given buffer
+ *
+ * This returns a pointer to a struct delta_index that should be passed to
+ * subsequent create_delta() calls, or to free_delta_index().  A NULL pointer
+ * is returned on failure.  The given buffer must not be freed nor altered
+ * before free_delta_index() is called.  The returned pointer must be freed
+ * using free_delta_index().
+ */
+extern int git_delta_index_init(
+	git_delta_index **out, const void *buf, size_t bufsize);
+
+/*
+ * Free the index created by git_delta_index_init()
+ */
+extern void git_delta_index_free(git_delta_index *index);
+
+/*
+ * Returns memory usage of delta index.
+ */
+extern size_t git_delta_index_size(git_delta_index *index);
+
+/*
+ * create_delta: create a delta from given index for the given buffer
+ *
+ * This function may be called multiple times with different buffers using
+ * the same delta_index pointer.  If max_delta_size is non-zero and the
+ * resulting delta is to be larger than max_delta_size then NULL is returned.
+ * On success, a non-NULL pointer to the buffer with the delta data is
+ * returned and *delta_size is updated with its size.  The returned buffer
+ * must be freed by the caller.
+ */
+extern int git_delta_create_from_index(
+	void **out,
+	size_t *out_size,
+	const struct git_delta_index *index,
+	const void *buf,
+	size_t bufsize,
+	size_t max_delta_size);
+
+/*
+ * diff_delta: create a delta from source buffer to target buffer
+ *
+ * If max_delta_size is non-zero and the resulting delta is to be larger
+ * than max_delta_size then GIT_EBUFS is returned.  On success, a non-NULL
+ * pointer to the buffer with the delta data is returned and *delta_size is
+ * updated with its size.  The returned buffer must be freed by the caller.
+ */
+GIT_INLINE(int) git_delta(
+	void **out, size_t *out_len,
+	const void *src_buf, size_t src_bufsize,
+	const void *trg_buf, size_t trg_bufsize,
+	size_t max_delta_size)
+{
+	git_delta_index *index;
+	int error = 0;
+
+	*out = NULL;
+	*out_len = 0;
+
+	if ((error = git_delta_index_init(&index, src_buf, src_bufsize)) < 0)
+		return error;
+
+	if (index) {
+		error = git_delta_create_from_index(out, out_len,
+			index, trg_buf, trg_bufsize, max_delta_size);
+
+		git_delta_index_free(index);
+	}
+
+	return error;
+}
+
+/* the smallest possible delta size is 4 bytes */
+#define GIT_DELTA_SIZE_MIN	4
+
+/**
+* Apply a git binary delta to recover the original content.
+* The caller is responsible for freeing the returned buffer.
+*
+* @param out the output buffer
+* @param out_len the length of the output buffer
+* @param base the base to copy from during copy instructions.
+* @param base_len number of bytes available at base.
+* @param delta the delta to execute copy/insert instructions from.
+* @param delta_len total number of bytes in the delta.
+* @return 0 on success or an error code
+*/
+extern int git_delta_apply(
+	void **out,
+	size_t *out_len,
+	const unsigned char *base,
+	size_t base_len,
+	const unsigned char *delta,
+	size_t delta_len);
+
+/**
+* Read the header of a git binary delta.
+*
+* @param base_out pointer to store the base size field.
+* @param result_out pointer to store the result size field.
+* @param delta the delta to execute copy/insert instructions from.
+* @param delta_len total number of bytes in the delta.
+* @return 0 on success or an error code
+*/
+extern int git_delta_read_header(
+	size_t *base_out,
+	size_t *result_out,
+	const unsigned char *delta,
+	size_t delta_len);
+
+/**
+ * Read the header of a git binary delta
+ *
+ * This variant reads just enough from the packfile stream to read the
+ * delta header.
+ */
+extern int git_delta_read_header_fromstream(
+	size_t *base_out,
+	size_t *result_out,
+	git_packfile_stream *stream);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/describe.c

@@ -0,0 +1,894 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "git2/describe.h"
+#include "git2/strarray.h"
+#include "git2/diff.h"
+#include "git2/status.h"
+
+#include "commit.h"
+#include "commit_list.h"
+#include "oidmap.h"
+#include "refs.h"
+#include "repository.h"
+#include "revwalk.h"
+#include "tag.h"
+#include "vector.h"
+#include "wildmatch.h"
+
+/* Ported from https://github.com/git/git/blob/89dde7882f71f846ccd0359756d27bebc31108de/builtin/describe.c */
+
+struct commit_name {
+	git_tag *tag;
+	unsigned prio:2; /* annotated tag = 2, tag = 1, head = 0 */
+	unsigned name_checked:1;
+	git_oid sha1;
+	char *path;
+
+	/* Khash workaround. They original key has to still be reachable */
+	git_oid peeled;
+};
+
+static void *oidmap_value_bykey(git_oidmap *map, const git_oid *key)
+{
+	return git_oidmap_get(map, key);
+}
+
+static struct commit_name *find_commit_name(
+	git_oidmap *names,
+	const git_oid *peeled)
+{
+	return (struct commit_name *)(oidmap_value_bykey(names, peeled));
+}
+
+static int replace_name(
+	git_tag **tag,
+	git_repository *repo,
+	struct commit_name *e,
+	unsigned int prio,
+	const git_oid *sha1)
+{
+	git_time_t e_time = 0, t_time = 0;
+
+	if (!e || e->prio < prio)
+		return 1;
+
+	if (e->prio == 2 && prio == 2) {
+		/* Multiple annotated tags point to the same commit.
+		 * Select one to keep based upon their tagger date.
+		 */
+		git_tag *t = NULL;
+
+		if (!e->tag) {
+			if (git_tag_lookup(&t, repo, &e->sha1) < 0)
+				return 1;
+			e->tag = t;
+		}
+
+		if (git_tag_lookup(&t, repo, sha1) < 0)
+			return 0;
+
+		*tag = t;
+
+		if (e->tag->tagger)
+			e_time = e->tag->tagger->when.time;
+
+		if (t->tagger)
+			t_time = t->tagger->when.time;
+
+		if (e_time < t_time)
+			return 1;
+	}
+
+	return 0;
+}
+
+static int add_to_known_names(
+	git_repository *repo,
+	git_oidmap *names,
+	const char *path,
+	const git_oid *peeled,
+	unsigned int prio,
+	const git_oid *sha1)
+{
+	struct commit_name *e = find_commit_name(names, peeled);
+	bool found = (e != NULL);
+
+	git_tag *tag = NULL;
+	if (replace_name(&tag, repo, e, prio, sha1)) {
+		if (!found) {
+			e = git__malloc(sizeof(struct commit_name));
+			GIT_ERROR_CHECK_ALLOC(e);
+
+			e->path = NULL;
+			e->tag = NULL;
+		}
+
+		if (e->tag)
+			git_tag_free(e->tag);
+		e->tag = tag;
+		e->prio = prio;
+		e->name_checked = 0;
+		git_oid_cpy(&e->sha1, sha1);
+		git__free(e->path);
+		e->path = git__strdup(path);
+		git_oid_cpy(&e->peeled, peeled);
+
+		if (!found && git_oidmap_set(names, &e->peeled, e) < 0)
+			return -1;
+	}
+	else
+		git_tag_free(tag);
+
+	return 0;
+}
+
+static int retrieve_peeled_tag_or_object_oid(
+	git_oid *peeled_out,
+	git_oid *ref_target_out,
+	git_repository *repo,
+	const char *refname)
+{
+	git_reference *ref;
+	git_object *peeled = NULL;
+	int error;
+
+	if ((error = git_reference_lookup_resolved(&ref, repo, refname, -1)) < 0)
+		return error;
+
+	if ((error = git_reference_peel(&peeled, ref, GIT_OBJECT_ANY)) < 0)
+		goto cleanup;
+
+	git_oid_cpy(ref_target_out, git_reference_target(ref));
+	git_oid_cpy(peeled_out, git_object_id(peeled));
+
+	if (git_oid_cmp(ref_target_out, peeled_out) != 0)
+		error = 1; /* The reference was pointing to a annotated tag */
+	else
+		error = 0; /* Any other object */
+
+cleanup:
+	git_reference_free(ref);
+	git_object_free(peeled);
+	return error;
+}
+
+struct git_describe_result {
+	int dirty;
+	int exact_match;
+	int fallback_to_id;
+	git_oid commit_id;
+	git_repository *repo;
+	struct commit_name *name;
+	struct possible_tag *tag;
+};
+
+struct get_name_data
+{
+	git_describe_options *opts;
+	git_repository *repo;
+	git_oidmap *names;
+	git_describe_result *result;
+};
+
+static int commit_name_dup(struct commit_name **out, struct commit_name *in)
+{
+	struct commit_name *name;
+
+	name = git__malloc(sizeof(struct commit_name));
+	GIT_ERROR_CHECK_ALLOC(name);
+
+	memcpy(name, in,  sizeof(struct commit_name));
+	name->tag = NULL;
+	name->path = NULL;
+
+	if (in->tag && git_tag_dup(&name->tag, in->tag) < 0)
+		return -1;
+
+	name->path = git__strdup(in->path);
+	GIT_ERROR_CHECK_ALLOC(name->path);
+
+	*out = name;
+	return 0;
+}
+
+static int get_name(const char *refname, void *payload)
+{
+	struct get_name_data *data;
+	bool is_tag, is_annotated, all;
+	git_oid peeled, sha1;
+	unsigned int prio;
+	int error = 0;
+
+	data = (struct get_name_data *)payload;
+	is_tag = !git__prefixcmp(refname, GIT_REFS_TAGS_DIR);
+	all = data->opts->describe_strategy == GIT_DESCRIBE_ALL;
+
+	/* Reject anything outside refs/tags/ unless --all */
+	if (!all && !is_tag)
+		return 0;
+
+	/* Accept only tags that match the pattern, if given */
+	if (data->opts->pattern && (!is_tag || wildmatch(data->opts->pattern,
+		refname + strlen(GIT_REFS_TAGS_DIR), 0)))
+				return 0;
+
+	/* Is it annotated? */
+	if ((error = retrieve_peeled_tag_or_object_oid(
+		&peeled, &sha1, data->repo, refname)) < 0)
+		return error;
+
+	is_annotated = error;
+
+	/*
+	 * By default, we only use annotated tags, but with --tags
+	 * we fall back to lightweight ones (even without --tags,
+	 * we still remember lightweight ones, only to give hints
+	 * in an error message).  --all allows any refs to be used.
+	 */
+	if (is_annotated)
+		prio = 2;
+	else if (is_tag)
+		prio = 1;
+	else
+		prio = 0;
+
+	add_to_known_names(data->repo, data->names,
+		all ? refname + strlen(GIT_REFS_DIR) : refname + strlen(GIT_REFS_TAGS_DIR),
+		&peeled, prio, &sha1);
+	return 0;
+}
+
+struct possible_tag {
+	struct commit_name *name;
+	int depth;
+	int found_order;
+	unsigned flag_within;
+};
+
+static int possible_tag_dup(struct possible_tag **out, struct possible_tag *in)
+{
+	struct possible_tag *tag;
+	int error;
+
+	tag = git__malloc(sizeof(struct possible_tag));
+	GIT_ERROR_CHECK_ALLOC(tag);
+
+	memcpy(tag, in, sizeof(struct possible_tag));
+	tag->name = NULL;
+
+	if ((error = commit_name_dup(&tag->name, in->name)) < 0) {
+		git__free(tag);
+		*out = NULL;
+		return error;
+	}
+
+	*out = tag;
+	return 0;
+}
+
+static int compare_pt(const void *a_, const void *b_)
+{
+	struct possible_tag *a = (struct possible_tag *)a_;
+	struct possible_tag *b = (struct possible_tag *)b_;
+	if (a->depth != b->depth)
+		return a->depth - b->depth;
+	if (a->found_order != b->found_order)
+		return a->found_order - b->found_order;
+	return 0;
+}
+
+#define SEEN (1u << 0)
+
+static unsigned long finish_depth_computation(
+	git_pqueue *list,
+	git_revwalk *walk,
+	struct possible_tag *best)
+{
+	unsigned long seen_commits = 0;
+	int error, i;
+
+	while (git_pqueue_size(list) > 0) {
+		git_commit_list_node *c = git_pqueue_pop(list);
+		seen_commits++;
+		if (c->flags & best->flag_within) {
+			size_t index = 0;
+			while (git_pqueue_size(list) > index) {
+				git_commit_list_node *i = git_pqueue_get(list, index);
+				if (!(i->flags & best->flag_within))
+					break;
+				index++;
+			}
+			if (index > git_pqueue_size(list))
+				break;
+		} else
+			best->depth++;
+		for (i = 0; i < c->out_degree; i++) {
+			git_commit_list_node *p = c->parents[i];
+			if ((error = git_commit_list_parse(walk, p)) < 0)
+				return error;
+			if (!(p->flags & SEEN))
+				if ((error = git_pqueue_insert(list, p)) < 0)
+					return error;
+			p->flags |= c->flags;
+		}
+	}
+	return seen_commits;
+}
+
+static int display_name(git_buf *buf, git_repository *repo, struct commit_name *n)
+{
+	if (n->prio == 2 && !n->tag) {
+		if (git_tag_lookup(&n->tag, repo, &n->sha1) < 0) {
+			git_error_set(GIT_ERROR_TAG, "annotated tag '%s' not available", n->path);
+			return -1;
+		}
+	}
+
+	if (n->tag && !n->name_checked) {
+		if (!git_tag_name(n->tag)) {
+			git_error_set(GIT_ERROR_TAG, "annotated tag '%s' has no embedded name", n->path);
+			return -1;
+		}
+
+		/* TODO: Cope with warnings
+		if (strcmp(n->tag->tag, all ? n->path + 5 : n->path))
+			warning(_("tag '%s' is really '%s' here"), n->tag->tag, n->path);
+		*/
+
+		n->name_checked = 1;
+	}
+
+	if (n->tag)
+		git_buf_printf(buf, "%s", git_tag_name(n->tag));
+	else
+		git_buf_printf(buf, "%s", n->path);
+
+	return 0;
+}
+
+static int find_unique_abbrev_size(
+	int *out,
+	git_repository *repo,
+	const git_oid *oid_in,
+	unsigned int abbreviated_size)
+{
+	size_t size = abbreviated_size;
+	git_odb *odb;
+	git_oid dummy;
+	int error;
+
+	if ((error = git_repository_odb__weakptr(&odb, repo)) < 0)
+		return error;
+
+	while (size < GIT_OID_HEXSZ) {
+		if ((error = git_odb_exists_prefix(&dummy, odb, oid_in, size)) == 0) {
+			*out = (int) size;
+			return 0;
+		}
+
+		/* If the error wasn't that it's not unique, then it's a proper error */
+		if (error != GIT_EAMBIGUOUS)
+			return error;
+
+		/* Try again with a larger size */
+		size++;
+	}
+
+	/* If we didn't find any shorter prefix, we have to do the whole thing */
+	*out = GIT_OID_HEXSZ;
+
+	return 0;
+}
+
+static int show_suffix(
+	git_buf *buf,
+	int depth,
+	git_repository *repo,
+	const git_oid* id,
+	unsigned int abbrev_size)
+{
+	int error, size = 0;
+
+	char hex_oid[GIT_OID_HEXSZ];
+
+	if ((error = find_unique_abbrev_size(&size, repo, id, abbrev_size)) < 0)
+		return error;
+
+	git_oid_fmt(hex_oid, id);
+
+	git_buf_printf(buf, "-%d-g", depth);
+
+	git_buf_put(buf, hex_oid, size);
+
+	return git_buf_oom(buf) ? -1 : 0;
+}
+
+#define MAX_CANDIDATES_TAGS FLAG_BITS - 1
+
+static int describe_not_found(const git_oid *oid, const char *message_format) {
+	char oid_str[GIT_OID_HEXSZ + 1];
+	git_oid_tostr(oid_str, sizeof(oid_str), oid);
+
+	git_error_set(GIT_ERROR_DESCRIBE, message_format, oid_str);
+	return GIT_ENOTFOUND;
+}
+
+static int describe(
+	struct get_name_data *data,
+	git_commit *commit)
+{
+	struct commit_name *n;
+	struct possible_tag *best;
+	bool all, tags;
+	git_revwalk *walk = NULL;
+	git_pqueue list;
+	git_commit_list_node *cmit, *gave_up_on = NULL;
+	git_vector all_matches = GIT_VECTOR_INIT;
+	unsigned int match_cnt = 0, annotated_cnt = 0, cur_match;
+	unsigned long seen_commits = 0;	/* TODO: Check long */
+	unsigned int unannotated_cnt = 0;
+	int error;
+
+	if (git_vector_init(&all_matches, MAX_CANDIDATES_TAGS, compare_pt) < 0)
+		return -1;
+
+	if ((error = git_pqueue_init(&list, 0, 2, git_commit_list_time_cmp)) < 0)
+		goto cleanup;
+
+	all = data->opts->describe_strategy == GIT_DESCRIBE_ALL;
+	tags = data->opts->describe_strategy == GIT_DESCRIBE_TAGS;
+
+	git_oid_cpy(&data->result->commit_id, git_commit_id(commit));
+
+	n = find_commit_name(data->names, git_commit_id(commit));
+	if (n && (tags || all || n->prio == 2)) {
+		/*
+		 * Exact match to an existing ref.
+		 */
+		data->result->exact_match = 1;
+		if ((error = commit_name_dup(&data->result->name, n)) < 0)
+			goto cleanup;
+
+		goto cleanup;
+	}
+
+	if (!data->opts->max_candidates_tags) {
+		error = describe_not_found(
+			git_commit_id(commit),
+			"cannot describe - no tag exactly matches '%s'");
+
+		goto cleanup;
+	}
+
+	if ((error = git_revwalk_new(&walk, git_commit_owner(commit))) < 0)
+		goto cleanup;
+
+	if ((cmit = git_revwalk__commit_lookup(walk, git_commit_id(commit))) == NULL)
+		goto cleanup;
+
+	if ((error = git_commit_list_parse(walk, cmit)) < 0)
+		goto cleanup;
+
+	cmit->flags = SEEN;
+
+	if ((error = git_pqueue_insert(&list, cmit)) < 0)
+		goto cleanup;
+
+	while (git_pqueue_size(&list) > 0)
+	{
+		int i;
+
+		git_commit_list_node *c = (git_commit_list_node *)git_pqueue_pop(&list);
+		seen_commits++;
+
+		n = find_commit_name(data->names, &c->oid);
+
+		if (n) {
+			if (!tags && !all && n->prio < 2) {
+				unannotated_cnt++;
+			} else if (match_cnt < data->opts->max_candidates_tags) {
+				struct possible_tag *t = git__malloc(sizeof(struct commit_name));
+				GIT_ERROR_CHECK_ALLOC(t);
+				if ((error = git_vector_insert(&all_matches, t)) < 0)
+					goto cleanup;
+
+				match_cnt++;
+
+				t->name = n;
+				t->depth = seen_commits - 1;
+				t->flag_within = 1u << match_cnt;
+				t->found_order = match_cnt;
+				c->flags |= t->flag_within;
+				if (n->prio == 2)
+					annotated_cnt++;
+			}
+			else {
+				gave_up_on = c;
+				break;
+			}
+		}
+
+		for (cur_match = 0; cur_match < match_cnt; cur_match++) {
+			struct possible_tag *t = git_vector_get(&all_matches, cur_match);
+			if (!(c->flags & t->flag_within))
+				t->depth++;
+		}
+
+		if (annotated_cnt && (git_pqueue_size(&list) == 0)) {
+			/*
+			if (debug) {
+				char oid_str[GIT_OID_HEXSZ + 1];
+				git_oid_tostr(oid_str, sizeof(oid_str), &c->oid);
+
+				fprintf(stderr, "finished search at %s\n", oid_str);
+			}
+			*/
+			break;
+		}
+		for (i = 0; i < c->out_degree; i++) {
+			git_commit_list_node *p = c->parents[i];
+			if ((error = git_commit_list_parse(walk, p)) < 0)
+				goto cleanup;
+			if (!(p->flags & SEEN))
+				if ((error = git_pqueue_insert(&list, p)) < 0)
+					goto cleanup;
+			p->flags |= c->flags;
+
+			if (data->opts->only_follow_first_parent)
+				break;
+		}
+	}
+
+	if (!match_cnt) {
+		if (data->opts->show_commit_oid_as_fallback) {
+			data->result->fallback_to_id = 1;
+			git_oid_cpy(&data->result->commit_id, &cmit->oid);
+
+			goto cleanup;
+		}
+		if (unannotated_cnt) {
+			error = describe_not_found(git_commit_id(commit),
+				"cannot describe - "
+				"no annotated tags can describe '%s'; "
+			    "however, there were unannotated tags.");
+			goto cleanup;
+		}
+		else {
+			error = describe_not_found(git_commit_id(commit),
+				"cannot describe - "
+				"no tags can describe '%s'.");
+			goto cleanup;
+		}
+	}
+
+	git_vector_sort(&all_matches);
+
+	best = (struct possible_tag *)git_vector_get(&all_matches, 0);
+
+	if (gave_up_on) {
+		if ((error = git_pqueue_insert(&list, gave_up_on)) < 0)
+			goto cleanup;
+		seen_commits--;
+	}
+	if ((error = finish_depth_computation(
+		&list, walk, best)) < 0)
+		goto cleanup;
+
+	seen_commits += error;
+	if ((error = possible_tag_dup(&data->result->tag, best)) < 0)
+		goto cleanup;
+
+	/*
+	{
+		static const char *prio_names[] = {
+			"head", "lightweight", "annotated",
+		};
+
+		char oid_str[GIT_OID_HEXSZ + 1];
+
+		if (debug) {
+			for (cur_match = 0; cur_match < match_cnt; cur_match++) {
+				struct possible_tag *t = (struct possible_tag *)git_vector_get(&all_matches, cur_match);
+				fprintf(stderr, " %-11s %8d %s\n",
+					prio_names[t->name->prio],
+					t->depth, t->name->path);
+			}
+			fprintf(stderr, "traversed %lu commits\n", seen_commits);
+			if (gave_up_on) {
+				git_oid_tostr(oid_str, sizeof(oid_str), &gave_up_on->oid);
+				fprintf(stderr,
+					"more than %i tags found; listed %i most recent\n"
+					"gave up search at %s\n",
+					data->opts->max_candidates_tags, data->opts->max_candidates_tags,
+					oid_str);
+			}
+		}
+	}
+	*/
+
+	git_oid_cpy(&data->result->commit_id, &cmit->oid);
+
+cleanup:
+	{
+		size_t i;
+		struct possible_tag *match;
+		git_vector_foreach(&all_matches, i, match) {
+			git__free(match);
+		}
+	}
+	git_vector_free(&all_matches);
+	git_pqueue_free(&list);
+	git_revwalk_free(walk);
+	return error;
+}
+
+static int normalize_options(
+	git_describe_options *dst,
+	const git_describe_options *src)
+{
+	git_describe_options default_options = GIT_DESCRIBE_OPTIONS_INIT;
+	if (!src) src = &default_options;
+
+	*dst = *src;
+
+	if (dst->max_candidates_tags > GIT_DESCRIBE_DEFAULT_MAX_CANDIDATES_TAGS)
+		dst->max_candidates_tags = GIT_DESCRIBE_DEFAULT_MAX_CANDIDATES_TAGS;
+
+	return 0;
+}
+
+int git_describe_commit(
+	git_describe_result **result,
+	git_object *committish,
+	git_describe_options *opts)
+{
+	struct get_name_data data;
+	struct commit_name *name;
+	git_commit *commit;
+	int error = -1;
+	git_describe_options normalized;
+
+	assert(committish);
+
+	data.result = git__calloc(1, sizeof(git_describe_result));
+	GIT_ERROR_CHECK_ALLOC(data.result);
+	data.result->repo = git_object_owner(committish);
+
+	data.repo = git_object_owner(committish);
+
+	if ((error = normalize_options(&normalized, opts)) < 0)
+		return error;
+
+	GIT_ERROR_CHECK_VERSION(
+		&normalized,
+		GIT_DESCRIBE_OPTIONS_VERSION,
+		"git_describe_options");
+	data.opts = &normalized;
+
+	if ((error = git_oidmap_new(&data.names)) < 0)
+		return error;
+
+	/** TODO: contains to be implemented */
+
+	if ((error = git_object_peel((git_object **)(&commit), committish, GIT_OBJECT_COMMIT)) < 0)
+		goto cleanup;
+
+	if ((error = git_reference_foreach_name(
+			git_object_owner(committish),
+			get_name, &data)) < 0)
+				goto cleanup;
+
+	if (git_oidmap_size(data.names) == 0 && !opts->show_commit_oid_as_fallback) {
+		git_error_set(GIT_ERROR_DESCRIBE, "cannot describe - "
+			"no reference found, cannot describe anything.");
+		error = -1;
+		goto cleanup;
+	}
+
+	if ((error = describe(&data, commit)) < 0)
+		goto cleanup;
+
+cleanup:
+	git_commit_free(commit);
+
+	git_oidmap_foreach_value(data.names, name, {
+		git_tag_free(name->tag);
+		git__free(name->path);
+		git__free(name);
+	});
+
+	git_oidmap_free(data.names);
+
+	if (error < 0)
+		git_describe_result_free(data.result);
+	else
+		*result = data.result;
+
+	return error;
+}
+
+int git_describe_workdir(
+	git_describe_result **out,
+	git_repository *repo,
+	git_describe_options *opts)
+{
+	int error;
+	git_oid current_id;
+	git_status_list *status = NULL;
+	git_status_options status_opts = GIT_STATUS_OPTIONS_INIT;
+	git_describe_result *result = NULL;
+	git_object *commit;
+
+	if ((error = git_reference_name_to_id(&current_id, repo, GIT_HEAD_FILE)) < 0)
+		return error;
+
+	if ((error = git_object_lookup(&commit, repo, &current_id, GIT_OBJECT_COMMIT)) < 0)
+		return error;
+
+	/* The first step is to perform a describe of HEAD, so we can leverage this */
+	if ((error = git_describe_commit(&result, commit, opts)) < 0)
+		goto out;
+
+	if ((error = git_status_list_new(&status, repo, &status_opts)) < 0)
+		goto out;
+
+
+	if (git_status_list_entrycount(status) > 0)
+		result->dirty = 1;
+
+out:
+	git_object_free(commit);
+	git_status_list_free(status);
+
+	if (error < 0)
+		git_describe_result_free(result);
+	else
+		*out = result;
+
+	return error;
+}
+
+static int normalize_format_options(
+	git_describe_format_options *dst,
+	const git_describe_format_options *src)
+{
+	if (!src) {
+		git_describe_format_options_init(dst, GIT_DESCRIBE_FORMAT_OPTIONS_VERSION);
+		return 0;
+	}
+
+	memcpy(dst, src, sizeof(git_describe_format_options));
+	return 0;
+}
+
+int git_describe_format(git_buf *out, const git_describe_result *result, const git_describe_format_options *given)
+{
+	int error;
+	git_repository *repo;
+	struct commit_name *name;
+	git_describe_format_options opts;
+
+	assert(out && result);
+
+	GIT_ERROR_CHECK_VERSION(given, GIT_DESCRIBE_FORMAT_OPTIONS_VERSION, "git_describe_format_options");
+	normalize_format_options(&opts, given);
+
+	git_buf_sanitize(out);
+
+
+	if (opts.always_use_long_format && opts.abbreviated_size == 0) {
+		git_error_set(GIT_ERROR_DESCRIBE, "cannot describe - "
+			"'always_use_long_format' is incompatible with a zero"
+			"'abbreviated_size'");
+		return -1;
+	}
+
+
+	repo = result->repo;
+
+	/* If we did find an exact match, then it's the easier method */
+	if (result->exact_match) {
+		name = result->name;
+		if ((error = display_name(out, repo, name)) < 0)
+			return error;
+
+		if (opts.always_use_long_format) {
+			const git_oid *id = name->tag ? git_tag_target_id(name->tag) : &result->commit_id;
+			if ((error = show_suffix(out, 0, repo, id, opts.abbreviated_size)) < 0)
+				return error;
+		}
+
+		if (result->dirty && opts.dirty_suffix)
+			git_buf_puts(out, opts.dirty_suffix);
+
+		return git_buf_oom(out) ? -1 : 0;
+	}
+
+	/* If we didn't find *any* tags, we fall back to the commit's id */
+	if (result->fallback_to_id) {
+		char hex_oid[GIT_OID_HEXSZ + 1] = {0};
+		int size = 0;
+
+		if ((error = find_unique_abbrev_size(
+			     &size, repo, &result->commit_id, opts.abbreviated_size)) < 0)
+			return -1;
+
+		git_oid_fmt(hex_oid, &result->commit_id);
+		git_buf_put(out, hex_oid, size);
+
+		if (result->dirty && opts.dirty_suffix)
+			git_buf_puts(out, opts.dirty_suffix);
+
+		return git_buf_oom(out) ? -1 : 0;
+	}
+
+	/* Lastly, if we found a matching tag, we show that */
+	name = result->tag->name;
+
+	if ((error = display_name(out, repo, name)) < 0)
+		return error;
+
+	if (opts.abbreviated_size) {
+		if ((error = show_suffix(out, result->tag->depth, repo,
+			&result->commit_id, opts.abbreviated_size)) < 0)
+			return error;
+	}
+
+	if (result->dirty && opts.dirty_suffix) {
+		git_buf_puts(out, opts.dirty_suffix);
+	}
+
+	return git_buf_oom(out) ? -1 : 0;
+}
+
+void git_describe_result_free(git_describe_result *result)
+{
+	if (result == NULL)
+		return;
+
+	if (result->name) {
+		git_tag_free(result->name->tag);
+		git__free(result->name->path);
+		git__free(result->name);
+	}
+
+	if (result->tag) {
+		git_tag_free(result->tag->name->tag);
+		git__free(result->tag->name->path);
+		git__free(result->tag->name);
+		git__free(result->tag);
+	}
+
+	git__free(result);
+}
+
+int git_describe_options_init(git_describe_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_describe_options, GIT_DESCRIBE_OPTIONS_INIT);
+	return 0;
+}
+
+int git_describe_init_options(git_describe_options *opts, unsigned int version)
+{
+	return git_describe_options_init(opts, version);
+}
+
+int git_describe_format_options_init(git_describe_format_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_describe_format_options, GIT_DESCRIBE_FORMAT_OPTIONS_INIT);
+	return 0;
+}
+
+int git_describe_init_format_options(git_describe_format_options *opts, unsigned int version)
+{
+	return git_describe_format_options_init(opts, version);
+}

node_modules/nodegit/vendor/libgit2/src/diff.c

@@ -0,0 +1,500 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "diff.h"
+
+#include "git2/version.h"
+#include "diff_generate.h"
+#include "patch.h"
+#include "commit.h"
+#include "index.h"
+
+struct patch_id_args {
+	git_hash_ctx ctx;
+	git_oid result;
+	int first_file;
+};
+
+GIT_INLINE(const char *) diff_delta__path(const git_diff_delta *delta)
+{
+	const char *str = delta->old_file.path;
+
+	if (!str ||
+		delta->status == GIT_DELTA_ADDED ||
+		delta->status == GIT_DELTA_RENAMED ||
+		delta->status == GIT_DELTA_COPIED)
+		str = delta->new_file.path;
+
+	return str;
+}
+
+const char *git_diff_delta__path(const git_diff_delta *delta)
+{
+	return diff_delta__path(delta);
+}
+
+int git_diff_delta__cmp(const void *a, const void *b)
+{
+	const git_diff_delta *da = a, *db = b;
+	int val = strcmp(diff_delta__path(da), diff_delta__path(db));
+	return val ? val : ((int)da->status - (int)db->status);
+}
+
+int git_diff_delta__casecmp(const void *a, const void *b)
+{
+	const git_diff_delta *da = a, *db = b;
+	int val = strcasecmp(diff_delta__path(da), diff_delta__path(db));
+	return val ? val : ((int)da->status - (int)db->status);
+}
+
+int git_diff__entry_cmp(const void *a, const void *b)
+{
+	const git_index_entry *entry_a = a;
+	const git_index_entry *entry_b = b;
+
+	return strcmp(entry_a->path, entry_b->path);
+}
+
+int git_diff__entry_icmp(const void *a, const void *b)
+{
+	const git_index_entry *entry_a = a;
+	const git_index_entry *entry_b = b;
+
+	return strcasecmp(entry_a->path, entry_b->path);
+}
+
+void git_diff_free(git_diff *diff)
+{
+	if (!diff)
+		return;
+
+	GIT_REFCOUNT_DEC(diff, diff->free_fn);
+}
+
+void git_diff_addref(git_diff *diff)
+{
+	GIT_REFCOUNT_INC(diff);
+}
+
+size_t git_diff_num_deltas(const git_diff *diff)
+{
+	assert(diff);
+	return diff->deltas.length;
+}
+
+size_t git_diff_num_deltas_of_type(const git_diff *diff, git_delta_t type)
+{
+	size_t i, count = 0;
+	const git_diff_delta *delta;
+
+	assert(diff);
+
+	git_vector_foreach(&diff->deltas, i, delta) {
+		count += (delta->status == type);
+	}
+
+	return count;
+}
+
+const git_diff_delta *git_diff_get_delta(const git_diff *diff, size_t idx)
+{
+	assert(diff);
+	return git_vector_get(&diff->deltas, idx);
+}
+
+int git_diff_is_sorted_icase(const git_diff *diff)
+{
+	return (diff->opts.flags & GIT_DIFF_IGNORE_CASE) != 0;
+}
+
+int git_diff_get_perfdata(git_diff_perfdata *out, const git_diff *diff)
+{
+	assert(out);
+	GIT_ERROR_CHECK_VERSION(out, GIT_DIFF_PERFDATA_VERSION, "git_diff_perfdata");
+	out->stat_calls = diff->perf.stat_calls;
+	out->oid_calculations = diff->perf.oid_calculations;
+	return 0;
+}
+
+int git_diff_foreach(
+	git_diff *diff,
+	git_diff_file_cb file_cb,
+	git_diff_binary_cb binary_cb,
+	git_diff_hunk_cb hunk_cb,
+	git_diff_line_cb data_cb,
+	void *payload)
+{
+	int error = 0;
+	git_diff_delta *delta;
+	size_t idx;
+
+	assert(diff);
+
+	git_vector_foreach(&diff->deltas, idx, delta) {
+		git_patch *patch;
+
+		/* check flags against patch status */
+		if (git_diff_delta__should_skip(&diff->opts, delta))
+			continue;
+
+		if ((error = git_patch_from_diff(&patch, diff, idx)) != 0)
+			break;
+
+		error = git_patch__invoke_callbacks(patch, file_cb, binary_cb,
+						    hunk_cb, data_cb, payload);
+		git_patch_free(patch);
+
+		if (error)
+			break;
+	}
+
+	return error;
+}
+
+int git_diff_format_email__append_header_tobuf(
+	git_buf *out,
+	const git_oid *id,
+	const git_signature *author,
+	const char *summary,
+	const char *body,
+	size_t patch_no,
+	size_t total_patches,
+	bool exclude_patchno_marker)
+{
+	char idstr[GIT_OID_HEXSZ + 1];
+	char date_str[GIT_DATE_RFC2822_SZ];
+	int error = 0;
+
+	git_oid_fmt(idstr, id);
+	idstr[GIT_OID_HEXSZ] = '\0';
+
+	if ((error = git__date_rfc2822_fmt(date_str, sizeof(date_str),
+		&author->when)) < 0)
+		return error;
+
+	error = git_buf_printf(out,
+				"From %s Mon Sep 17 00:00:00 2001\n" \
+				"From: %s <%s>\n" \
+				"Date: %s\n" \
+				"Subject: ",
+				idstr,
+				author->name, author->email,
+				date_str);
+
+	if (error < 0)
+		return error;
+
+	if (!exclude_patchno_marker) {
+		if (total_patches == 1) {
+			error = git_buf_puts(out, "[PATCH] ");
+		} else {
+			error = git_buf_printf(out, "[PATCH %"PRIuZ"/%"PRIuZ"] ",
+				patch_no, total_patches);
+		}
+
+		if (error < 0)
+			return error;
+	}
+
+	error = git_buf_printf(out, "%s\n\n", summary);
+
+	if (body) {
+		git_buf_puts(out, body);
+
+		if (out->ptr[out->size - 1] != '\n')
+			git_buf_putc(out, '\n');
+	}
+
+	return error;
+}
+
+int git_diff_format_email__append_patches_tobuf(
+	git_buf *out,
+	git_diff *diff)
+{
+	size_t i, deltas;
+	int error = 0;
+
+	deltas = git_diff_num_deltas(diff);
+
+	for (i = 0; i < deltas; ++i) {
+		git_patch *patch = NULL;
+
+		if ((error = git_patch_from_diff(&patch, diff, i)) >= 0)
+			error = git_patch_to_buf(out, patch);
+
+		git_patch_free(patch);
+
+		if (error < 0)
+			break;
+	}
+
+	return error;
+}
+
+int git_diff_format_email(
+	git_buf *out,
+	git_diff *diff,
+	const git_diff_format_email_options *opts)
+{
+	git_diff_stats *stats = NULL;
+	char *summary = NULL, *loc = NULL;
+	bool ignore_marker;
+	unsigned int format_flags = 0;
+	size_t allocsize;
+	int error;
+
+	assert(out && diff && opts);
+	assert(opts->summary && opts->id && opts->author);
+
+	GIT_ERROR_CHECK_VERSION(opts,
+		GIT_DIFF_FORMAT_EMAIL_OPTIONS_VERSION,
+		"git_format_email_options");
+
+	ignore_marker = (opts->flags &
+		GIT_DIFF_FORMAT_EMAIL_EXCLUDE_SUBJECT_PATCH_MARKER) != 0;
+
+	if (!ignore_marker) {
+		if (opts->patch_no > opts->total_patches) {
+			git_error_set(GIT_ERROR_INVALID,
+				"patch %"PRIuZ" out of range. max %"PRIuZ,
+				opts->patch_no, opts->total_patches);
+			return -1;
+		}
+
+		if (opts->patch_no == 0) {
+			git_error_set(GIT_ERROR_INVALID,
+				"invalid patch no %"PRIuZ". should be >0", opts->patch_no);
+			return -1;
+		}
+	}
+
+	/* the summary we receive may not be clean.
+	 * it could potentially contain new line characters
+	 * or not be set, sanitize, */
+	if ((loc = strpbrk(opts->summary, "\r\n")) != NULL) {
+		size_t offset = 0;
+
+		if ((offset = (loc - opts->summary)) == 0) {
+			git_error_set(GIT_ERROR_INVALID, "summary is empty");
+			error = -1;
+			goto on_error;
+		}
+
+		GIT_ERROR_CHECK_ALLOC_ADD(&allocsize, offset, 1);
+		summary = git__calloc(allocsize, sizeof(char));
+		GIT_ERROR_CHECK_ALLOC(summary);
+
+		strncpy(summary, opts->summary, offset);
+	}
+
+	error = git_diff_format_email__append_header_tobuf(out,
+		opts->id, opts->author, summary == NULL ? opts->summary : summary,
+		opts->body, opts->patch_no, opts->total_patches, ignore_marker);
+
+	if (error < 0)
+		goto on_error;
+
+	format_flags = GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_INCLUDE_SUMMARY;
+
+	if ((error = git_buf_puts(out, "---\n")) < 0 ||
+		(error = git_diff_get_stats(&stats, diff)) < 0 ||
+		(error = git_diff_stats_to_buf(out, stats, format_flags, 0)) < 0 ||
+		(error = git_buf_putc(out, '\n')) < 0 ||
+		(error = git_diff_format_email__append_patches_tobuf(out, diff)) < 0)
+			goto on_error;
+
+	error = git_buf_puts(out, "--\nlibgit2 " LIBGIT2_VERSION "\n\n");
+
+on_error:
+	git__free(summary);
+	git_diff_stats_free(stats);
+
+	return error;
+}
+
+int git_diff_commit_as_email(
+	git_buf *out,
+	git_repository *repo,
+	git_commit *commit,
+	size_t patch_no,
+	size_t total_patches,
+	uint32_t flags,
+	const git_diff_options *diff_opts)
+{
+	git_diff *diff = NULL;
+	git_diff_format_email_options opts =
+		GIT_DIFF_FORMAT_EMAIL_OPTIONS_INIT;
+	int error;
+
+	assert (out && repo && commit);
+
+	opts.flags = flags;
+	opts.patch_no = patch_no;
+	opts.total_patches = total_patches;
+	opts.id = git_commit_id(commit);
+	opts.summary = git_commit_summary(commit);
+	opts.body = git_commit_body(commit);
+	opts.author = git_commit_author(commit);
+
+	if ((error = git_diff__commit(&diff, repo, commit, diff_opts)) < 0)
+		return error;
+
+	error = git_diff_format_email(out, diff, &opts);
+
+	git_diff_free(diff);
+	return error;
+}
+
+int git_diff_options_init(git_diff_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_diff_options, GIT_DIFF_OPTIONS_INIT);
+	return 0;
+}
+
+int git_diff_init_options(git_diff_options *opts, unsigned int version)
+{
+	return git_diff_options_init(opts, version);
+}
+
+int git_diff_find_options_init(
+	git_diff_find_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_diff_find_options, GIT_DIFF_FIND_OPTIONS_INIT);
+	return 0;
+}
+
+int git_diff_find_init_options(
+	git_diff_find_options *opts, unsigned int version)
+{
+	return git_diff_find_options_init(opts, version);
+}
+
+int git_diff_format_email_options_init(
+	git_diff_format_email_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_diff_format_email_options,
+		GIT_DIFF_FORMAT_EMAIL_OPTIONS_INIT);
+	return 0;
+}
+
+int git_diff_format_email_init_options(
+	git_diff_format_email_options *opts, unsigned int version)
+{
+	return git_diff_format_email_options_init(opts, version);
+}
+
+static int flush_hunk(git_oid *result, git_hash_ctx *ctx)
+{
+	git_oid hash;
+	unsigned short carry = 0;
+	int error, i;
+
+	if ((error = git_hash_final(&hash, ctx)) < 0 ||
+	    (error = git_hash_init(ctx)) < 0)
+		return error;
+
+	for (i = 0; i < GIT_OID_RAWSZ; i++) {
+		carry += result->id[i] + hash.id[i];
+		result->id[i] = (unsigned char)carry;
+		carry >>= 8;
+	}
+
+	return 0;
+}
+
+static void strip_spaces(git_buf *buf)
+{
+	char *src = buf->ptr, *dst = buf->ptr;
+	char c;
+	size_t len = 0;
+
+	while ((c = *src++) != '\0') {
+		if (!git__isspace(c)) {
+			*dst++ = c;
+			len++;
+		}
+	}
+
+	git_buf_truncate(buf, len);
+}
+
+int git_diff_patchid_print_callback__to_buf(
+	const git_diff_delta *delta,
+	const git_diff_hunk *hunk,
+	const git_diff_line *line,
+	void *payload)
+{
+	struct patch_id_args *args = (struct patch_id_args *) payload;
+	git_buf buf = GIT_BUF_INIT;
+	int error = 0;
+
+	if (line->origin == GIT_DIFF_LINE_CONTEXT_EOFNL ||
+	    line->origin == GIT_DIFF_LINE_ADD_EOFNL ||
+	    line->origin == GIT_DIFF_LINE_DEL_EOFNL)
+		goto out;
+
+	if ((error = git_diff_print_callback__to_buf(delta, hunk,
+						     line, &buf)) < 0)
+		goto out;
+
+	strip_spaces(&buf);
+
+	if (line->origin == GIT_DIFF_LINE_FILE_HDR &&
+	    !args->first_file &&
+	    (error = flush_hunk(&args->result, &args->ctx) < 0))
+			goto out;
+
+	if ((error = git_hash_update(&args->ctx, buf.ptr, buf.size)) < 0)
+		goto out;
+
+	if (line->origin == GIT_DIFF_LINE_FILE_HDR && args->first_file)
+		args->first_file = 0;
+
+out:
+	git_buf_dispose(&buf);
+	return error;
+}
+
+int git_diff_patchid_options_init(git_diff_patchid_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_diff_patchid_options, GIT_DIFF_PATCHID_OPTIONS_INIT);
+	return 0;
+}
+
+int git_diff_patchid(git_oid *out, git_diff *diff, git_diff_patchid_options *opts)
+{
+	struct patch_id_args args;
+	int error;
+
+	GIT_ERROR_CHECK_VERSION(
+		opts, GIT_DIFF_PATCHID_OPTIONS_VERSION, "git_diff_patchid_options");
+
+	memset(&args, 0, sizeof(args));
+	args.first_file = 1;
+	if ((error = git_hash_ctx_init(&args.ctx)) < 0)
+		goto out;
+
+	if ((error = git_diff_print(diff,
+				    GIT_DIFF_FORMAT_PATCH_ID,
+				    git_diff_patchid_print_callback__to_buf,
+				    &args)) < 0)
+		goto out;
+
+	if ((error = (flush_hunk(&args.result, &args.ctx))) < 0)
+		goto out;
+
+	git_oid_cpy(out, &args.result);
+
+out:
+	git_hash_ctx_cleanup(&args.ctx);
+	return error;
+}

node_modules/nodegit/vendor/libgit2/src/diff.h

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_diff_h__
+#define INCLUDE_diff_h__
+
+#include "common.h"
+
+#include "git2/diff.h"
+#include "git2/patch.h"
+#include "git2/sys/diff.h"
+#include "git2/oid.h"
+
+#include <stdio.h>
+#include "vector.h"
+#include "buffer.h"
+#include "iterator.h"
+#include "repository.h"
+#include "pool.h"
+#include "odb.h"
+
+#define DIFF_OLD_PREFIX_DEFAULT "a/"
+#define DIFF_NEW_PREFIX_DEFAULT "b/"
+
+typedef enum {
+	GIT_DIFF_TYPE_UNKNOWN = 0,
+	GIT_DIFF_TYPE_GENERATED = 1,
+	GIT_DIFF_TYPE_PARSED = 2,
+} git_diff_origin_t;
+
+struct git_diff {
+	git_refcount     rc;
+	git_repository   *repo;
+	git_attr_session attrsession;
+	git_diff_origin_t type;
+	git_diff_options opts;
+	git_vector       deltas;    /* vector of git_diff_delta */
+	git_pool pool;
+	git_iterator_type_t old_src;
+	git_iterator_type_t new_src;
+	git_diff_perfdata perf;
+
+	int (*strcomp)(const char *, const char *);
+	int (*strncomp)(const char *, const char *, size_t);
+	int (*pfxcomp)(const char *str, const char *pfx);
+	int (*entrycomp)(const void *a, const void *b);
+
+	int (*patch_fn)(git_patch **out, git_diff *diff, size_t idx);
+	void (*free_fn)(git_diff *diff);
+};
+
+extern int git_diff_delta__format_file_header(
+	git_buf *out,
+	const git_diff_delta *delta,
+	const char *oldpfx,
+	const char *newpfx,
+	int oid_strlen,
+	bool print_index);
+
+extern int git_diff_delta__cmp(const void *a, const void *b);
+extern int git_diff_delta__casecmp(const void *a, const void *b);
+
+extern int git_diff__entry_cmp(const void *a, const void *b);
+extern int git_diff__entry_icmp(const void *a, const void *b);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/diff_driver.c

@@ -0,0 +1,520 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "diff_driver.h"
+
+#include "git2/attr.h"
+
+#include "common.h"
+#include "diff.h"
+#include "strmap.h"
+#include "map.h"
+#include "buf_text.h"
+#include "config.h"
+#include "regexp.h"
+#include "repository.h"
+
+typedef enum {
+	DIFF_DRIVER_AUTO = 0,
+	DIFF_DRIVER_BINARY = 1,
+	DIFF_DRIVER_TEXT = 2,
+	DIFF_DRIVER_PATTERNLIST = 3,
+} git_diff_driver_t;
+
+typedef struct {
+	git_regexp re;
+	int flags;
+} git_diff_driver_pattern;
+
+enum {
+	REG_NEGATE = (1 << 15) /* get out of the way of existing flags */
+};
+
+/* data for finding function context for a given file type */
+struct git_diff_driver {
+	git_diff_driver_t type;
+	uint32_t binary_flags;
+	uint32_t other_flags;
+	git_array_t(git_diff_driver_pattern) fn_patterns;
+	git_regexp  word_pattern;
+	char name[GIT_FLEX_ARRAY];
+};
+
+#include "userdiff.h"
+
+struct git_diff_driver_registry {
+	git_strmap *drivers;
+};
+
+#define FORCE_DIFFABLE (GIT_DIFF_FORCE_TEXT | GIT_DIFF_FORCE_BINARY)
+
+static git_diff_driver global_drivers[3] = {
+	{ DIFF_DRIVER_AUTO,   0, 0, },
+	{ DIFF_DRIVER_BINARY, GIT_DIFF_FORCE_BINARY, 0 },
+	{ DIFF_DRIVER_TEXT,   GIT_DIFF_FORCE_TEXT, 0 },
+};
+
+git_diff_driver_registry *git_diff_driver_registry_new(void)
+{
+	git_diff_driver_registry *reg =
+		git__calloc(1, sizeof(git_diff_driver_registry));
+	if (!reg)
+		return NULL;
+
+	if (git_strmap_new(&reg->drivers) < 0) {
+		git_diff_driver_registry_free(reg);
+		return NULL;
+	}
+
+	return reg;
+}
+
+void git_diff_driver_registry_free(git_diff_driver_registry *reg)
+{
+	git_diff_driver *drv;
+
+	if (!reg)
+		return;
+
+	git_strmap_foreach_value(reg->drivers, drv, git_diff_driver_free(drv));
+	git_strmap_free(reg->drivers);
+	git__free(reg);
+}
+
+static int diff_driver_add_patterns(
+	git_diff_driver *drv, const char *regex_str, int regex_flags)
+{
+	int error = 0;
+	const char *scan, *end;
+	git_diff_driver_pattern *pat = NULL;
+	git_buf buf = GIT_BUF_INIT;
+
+	for (scan = regex_str; scan; scan = end) {
+		/* get pattern to fill in */
+		if ((pat = git_array_alloc(drv->fn_patterns)) == NULL) {
+			return -1;
+		}
+
+		pat->flags = regex_flags;
+		if (*scan == '!') {
+			pat->flags |= REG_NEGATE;
+			++scan;
+		}
+
+		if ((end = strchr(scan, '\n')) != NULL) {
+			error = git_buf_set(&buf, scan, end - scan);
+			end++;
+		} else {
+			error = git_buf_sets(&buf, scan);
+		}
+		if (error < 0)
+			break;
+
+		if ((error = git_regexp_compile(&pat->re, buf.ptr, regex_flags)) != 0) {
+			/*
+			 * TODO: issue a warning
+			 */
+		}
+	}
+
+	if (error && pat != NULL)
+		(void)git_array_pop(drv->fn_patterns); /* release last item */
+	git_buf_dispose(&buf);
+
+	/* We want to ignore bad patterns, so return success regardless */
+	return 0;
+}
+
+static int diff_driver_xfuncname(const git_config_entry *entry, void *payload)
+{
+	return diff_driver_add_patterns(payload, entry->value, 0);
+}
+
+static int diff_driver_funcname(const git_config_entry *entry, void *payload)
+{
+	return diff_driver_add_patterns(payload, entry->value, 0);
+}
+
+static git_diff_driver_registry *git_repository_driver_registry(
+	git_repository *repo)
+{
+	if (!repo->diff_drivers) {
+		git_diff_driver_registry *reg = git_diff_driver_registry_new();
+		reg = git__compare_and_swap(&repo->diff_drivers, NULL, reg);
+
+		if (reg != NULL) /* if we race, free losing allocation */
+			git_diff_driver_registry_free(reg);
+	}
+
+	if (!repo->diff_drivers)
+		git_error_set(GIT_ERROR_REPOSITORY, "unable to create diff driver registry");
+
+	return repo->diff_drivers;
+}
+
+static int diff_driver_alloc(
+	git_diff_driver **out, size_t *namelen_out, const char *name)
+{
+	git_diff_driver *driver;
+	size_t driverlen = sizeof(git_diff_driver),
+		namelen = strlen(name),
+		alloclen;
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, driverlen, namelen);
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, alloclen, 1);
+
+	driver = git__calloc(1, alloclen);
+	GIT_ERROR_CHECK_ALLOC(driver);
+
+	memcpy(driver->name, name, namelen);
+
+	*out = driver;
+
+	if (namelen_out)
+		*namelen_out = namelen;
+
+	return 0;
+}
+
+static int git_diff_driver_builtin(
+	git_diff_driver **out,
+	git_diff_driver_registry *reg,
+	const char *driver_name)
+{
+	git_diff_driver_definition *ddef = NULL;
+	git_diff_driver *drv = NULL;
+	int error = 0;
+	size_t idx;
+
+	for (idx = 0; idx < ARRAY_SIZE(builtin_defs); ++idx) {
+		if (!strcasecmp(driver_name, builtin_defs[idx].name)) {
+			ddef = &builtin_defs[idx];
+			break;
+		}
+	}
+	if (!ddef)
+		goto done;
+
+	if ((error = diff_driver_alloc(&drv, NULL, ddef->name)) < 0)
+		goto done;
+
+	drv->type = DIFF_DRIVER_PATTERNLIST;
+
+	if (ddef->fns &&
+		(error = diff_driver_add_patterns(
+			drv, ddef->fns, ddef->flags)) < 0)
+		goto done;
+
+	if (ddef->words &&
+	    (error = git_regexp_compile(&drv->word_pattern, ddef->words, ddef->flags)) < 0)
+		goto done;
+
+	if ((error = git_strmap_set(reg->drivers, drv->name, drv)) < 0)
+		goto done;
+
+done:
+	if (error && drv)
+		git_diff_driver_free(drv);
+	else
+		*out = drv;
+
+	return error;
+}
+
+static int git_diff_driver_load(
+	git_diff_driver **out, git_repository *repo, const char *driver_name)
+{
+	int error = 0;
+	git_diff_driver_registry *reg;
+	git_diff_driver *drv;
+	size_t namelen;
+	git_config *cfg = NULL;
+	git_buf name = GIT_BUF_INIT;
+	git_config_entry *ce = NULL;
+	bool found_driver = false;
+
+	if ((reg = git_repository_driver_registry(repo)) == NULL)
+		return -1;
+
+	if ((drv = git_strmap_get(reg->drivers, driver_name)) != NULL) {
+		*out = drv;
+		return 0;
+	}
+
+	if ((error = diff_driver_alloc(&drv, &namelen, driver_name)) < 0)
+		goto done;
+
+	drv->type = DIFF_DRIVER_AUTO;
+
+	/* if you can't read config for repo, just use default driver */
+	if (git_repository_config_snapshot(&cfg, repo) < 0) {
+		git_error_clear();
+		goto done;
+	}
+
+	if ((error = git_buf_printf(&name, "diff.%s.binary", driver_name)) < 0)
+		goto done;
+
+	switch (git_config__get_bool_force(cfg, name.ptr, -1)) {
+	case true:
+		/* if diff.<driver>.binary is true, just return the binary driver */
+		*out = &global_drivers[DIFF_DRIVER_BINARY];
+		goto done;
+	case false:
+		/* if diff.<driver>.binary is false, force binary checks off */
+		/* but still may have custom function context patterns, etc. */
+		drv->binary_flags = GIT_DIFF_FORCE_TEXT;
+		found_driver = true;
+		break;
+	default:
+		/* diff.<driver>.binary unspecified or "auto", so just continue */
+		break;
+	}
+
+	/* TODO: warn if diff.<name>.command or diff.<name>.textconv are set */
+
+	git_buf_truncate(&name, namelen + strlen("diff.."));
+	if ((error = git_buf_PUTS(&name, "xfuncname")) < 0)
+		goto done;
+
+	if ((error = git_config_get_multivar_foreach(
+			cfg, name.ptr, NULL, diff_driver_xfuncname, drv)) < 0) {
+		if (error != GIT_ENOTFOUND)
+			goto done;
+		git_error_clear(); /* no diff.<driver>.xfuncname, so just continue */
+	}
+
+	git_buf_truncate(&name, namelen + strlen("diff.."));
+	if ((error = git_buf_PUTS(&name, "funcname")) < 0)
+		goto done;
+
+	if ((error = git_config_get_multivar_foreach(
+			cfg, name.ptr, NULL, diff_driver_funcname, drv)) < 0) {
+		if (error != GIT_ENOTFOUND)
+			goto done;
+		git_error_clear(); /* no diff.<driver>.funcname, so just continue */
+	}
+
+	/* if we found any patterns, set driver type to use correct callback */
+	if (git_array_size(drv->fn_patterns) > 0) {
+		drv->type = DIFF_DRIVER_PATTERNLIST;
+		found_driver = true;
+	}
+
+	git_buf_truncate(&name, namelen + strlen("diff.."));
+	if ((error = git_buf_PUTS(&name, "wordregex")) < 0)
+		goto done;
+
+	if ((error = git_config__lookup_entry(&ce, cfg, name.ptr, false)) < 0)
+		goto done;
+	if (!ce || !ce->value)
+		/* no diff.<driver>.wordregex, so just continue */;
+	else if (!(error = git_regexp_compile(&drv->word_pattern, ce->value, 0)))
+		found_driver = true;
+	else {
+		/* TODO: warn about bad regex instead of failure */
+		goto done;
+	}
+
+	/* TODO: look up diff.<driver>.algorithm to turn on minimal / patience
+	 * diff in drv->other_flags
+	 */
+
+	/* if no driver config found at all, fall back on AUTO driver */
+	if (!found_driver)
+		goto done;
+
+	/* store driver in registry */
+	if ((error = git_strmap_set(reg->drivers, drv->name, drv)) < 0)
+		goto done;
+
+	*out = drv;
+
+done:
+	git_config_entry_free(ce);
+	git_buf_dispose(&name);
+	git_config_free(cfg);
+
+	if (!*out) {
+		int error2 = git_diff_driver_builtin(out, reg, driver_name);
+		if (!error)
+			error = error2;
+	}
+
+	if (drv && drv != *out)
+		git_diff_driver_free(drv);
+
+	return error;
+}
+
+int git_diff_driver_lookup(
+	git_diff_driver **out, git_repository *repo,
+	git_attr_session *attrsession, const char *path)
+{
+	int error = 0;
+	const char *values[1], *attrs[] = { "diff" };
+
+	assert(out);
+	*out = NULL;
+
+	if (!repo || !path || !strlen(path))
+		/* just use the auto value */;
+	else if ((error = git_attr_get_many_with_session(values, repo,
+			attrsession, 0, path, 1, attrs)) < 0)
+		/* return error below */;
+
+	else if (GIT_ATTR_IS_UNSPECIFIED(values[0]))
+		/* just use the auto value */;
+	else if (GIT_ATTR_IS_FALSE(values[0]))
+		*out = &global_drivers[DIFF_DRIVER_BINARY];
+	else if (GIT_ATTR_IS_TRUE(values[0]))
+		*out = &global_drivers[DIFF_DRIVER_TEXT];
+
+	/* otherwise look for driver information in config and build driver */
+	else if ((error = git_diff_driver_load(out, repo, values[0])) < 0) {
+		if (error == GIT_ENOTFOUND) {
+			error = 0;
+			git_error_clear();
+		}
+	}
+
+	if (!*out)
+		*out = &global_drivers[DIFF_DRIVER_AUTO];
+
+	return error;
+}
+
+void git_diff_driver_free(git_diff_driver *driver)
+{
+	size_t i;
+
+	if (!driver)
+		return;
+
+	for (i = 0; i < git_array_size(driver->fn_patterns); ++i)
+		git_regexp_dispose(& git_array_get(driver->fn_patterns, i)->re);
+	git_array_clear(driver->fn_patterns);
+
+	git_regexp_dispose(&driver->word_pattern);
+
+	git__free(driver);
+}
+
+void git_diff_driver_update_options(
+	uint32_t *option_flags, git_diff_driver *driver)
+{
+	if ((*option_flags & FORCE_DIFFABLE) == 0)
+		*option_flags |= driver->binary_flags;
+
+	*option_flags |= driver->other_flags;
+}
+
+int git_diff_driver_content_is_binary(
+	git_diff_driver *driver, const char *content, size_t content_len)
+{
+	git_buf search = GIT_BUF_INIT;
+
+	GIT_UNUSED(driver);
+
+	git_buf_attach_notowned(&search, content,
+		min(content_len, GIT_FILTER_BYTES_TO_CHECK_NUL));
+
+	/* TODO: provide encoding / binary detection callbacks that can
+	 * be UTF-8 aware, etc.  For now, instead of trying to be smart,
+	 * let's just use the simple NUL-byte detection that core git uses.
+	 */
+
+	/* previously was: if (git_buf_text_is_binary(&search)) */
+	if (git_buf_text_contains_nul(&search))
+		return 1;
+
+	return 0;
+}
+
+static int diff_context_line__simple(
+	git_diff_driver *driver, git_buf *line)
+{
+	char firstch = line->ptr[0];
+	GIT_UNUSED(driver);
+	return (git__isalpha(firstch) || firstch == '_' || firstch == '$');
+}
+
+static int diff_context_line__pattern_match(
+	git_diff_driver *driver, git_buf *line)
+{
+	size_t i, maxi = git_array_size(driver->fn_patterns);
+	git_regmatch pmatch[2];
+
+	for (i = 0; i < maxi; ++i) {
+		git_diff_driver_pattern *pat = git_array_get(driver->fn_patterns, i);
+
+		if (!git_regexp_search(&pat->re, line->ptr, 2, pmatch)) {
+			if (pat->flags & REG_NEGATE)
+				return false;
+
+			/* use pmatch data to trim line data */
+			i = (pmatch[1].start >= 0) ? 1 : 0;
+			git_buf_consume(line, git_buf_cstr(line) + pmatch[i].start);
+			git_buf_truncate(line, pmatch[i].end - pmatch[i].start);
+			git_buf_rtrim(line);
+
+			return true;
+		}
+	}
+
+	return false;
+}
+
+static long diff_context_find(
+	const char *line,
+	long line_len,
+	char *out,
+	long out_size,
+	void *payload)
+{
+	git_diff_find_context_payload *ctxt = payload;
+
+	if (git_buf_set(&ctxt->line, line, (size_t)line_len) < 0)
+		return -1;
+	git_buf_rtrim(&ctxt->line);
+
+	if (!ctxt->line.size)
+		return -1;
+
+	if (!ctxt->match_line || !ctxt->match_line(ctxt->driver, &ctxt->line))
+		return -1;
+
+	if (out_size > (long)ctxt->line.size)
+		out_size = (long)ctxt->line.size;
+	memcpy(out, ctxt->line.ptr, (size_t)out_size);
+
+	return out_size;
+}
+
+void git_diff_find_context_init(
+	git_diff_find_context_fn *findfn_out,
+	git_diff_find_context_payload *payload_out,
+	git_diff_driver *driver)
+{
+	*findfn_out = driver ? diff_context_find : NULL;
+
+	memset(payload_out, 0, sizeof(*payload_out));
+	if (driver) {
+		payload_out->driver = driver;
+		payload_out->match_line = (driver->type == DIFF_DRIVER_PATTERNLIST) ?
+			diff_context_line__pattern_match : diff_context_line__simple;
+		git_buf_init(&payload_out->line, 0);
+	}
+}
+
+void git_diff_find_context_clear(git_diff_find_context_payload *payload)
+{
+	if (payload) {
+		git_buf_dispose(&payload->line);
+		payload->driver = NULL;
+	}
+}

node_modules/nodegit/vendor/libgit2/src/diff_driver.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_diff_driver_h__
+#define INCLUDE_diff_driver_h__
+
+#include "common.h"
+
+#include "attr_file.h"
+#include "buffer.h"
+
+typedef struct git_diff_driver_registry git_diff_driver_registry;
+
+git_diff_driver_registry *git_diff_driver_registry_new(void);
+void git_diff_driver_registry_free(git_diff_driver_registry *);
+
+typedef struct git_diff_driver git_diff_driver;
+
+int git_diff_driver_lookup(git_diff_driver **, git_repository *,
+	git_attr_session *attrsession, const char *);
+void git_diff_driver_free(git_diff_driver *);
+
+/* diff option flags to force off and on for this driver */
+void git_diff_driver_update_options(uint32_t *option_flags, git_diff_driver *);
+
+/* returns -1 meaning "unknown", 0 meaning not binary, 1 meaning binary */
+int git_diff_driver_content_is_binary(
+	git_diff_driver *, const char *content, size_t content_len);
+
+typedef long (*git_diff_find_context_fn)(
+	const char *, long, char *, long, void *);
+
+typedef int (*git_diff_find_context_line)(
+	git_diff_driver *, git_buf *);
+
+typedef struct {
+	git_diff_driver *driver;
+	git_diff_find_context_line match_line;
+	git_buf line;
+} git_diff_find_context_payload;
+
+void git_diff_find_context_init(
+	git_diff_find_context_fn *findfn_out,
+	git_diff_find_context_payload *payload_out,
+	git_diff_driver *driver);
+
+void git_diff_find_context_clear(git_diff_find_context_payload *);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/diff_file.c

@@ -0,0 +1,474 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "diff_file.h"
+
+#include "git2/blob.h"
+#include "git2/submodule.h"
+#include "diff.h"
+#include "diff_generate.h"
+#include "odb.h"
+#include "futils.h"
+#include "filter.h"
+
+#define DIFF_MAX_FILESIZE 0x20000000
+
+static bool diff_file_content_binary_by_size(git_diff_file_content *fc)
+{
+	/* if we have diff opts, check max_size vs file size */
+	if ((fc->file->flags & DIFF_FLAGS_KNOWN_BINARY) == 0 &&
+		fc->opts_max_size > 0 &&
+		fc->file->size > fc->opts_max_size)
+		fc->file->flags |= GIT_DIFF_FLAG_BINARY;
+
+	return ((fc->file->flags & GIT_DIFF_FLAG_BINARY) != 0);
+}
+
+static void diff_file_content_binary_by_content(git_diff_file_content *fc)
+{
+	if ((fc->file->flags & DIFF_FLAGS_KNOWN_BINARY) != 0)
+		return;
+
+	switch (git_diff_driver_content_is_binary(
+		fc->driver, fc->map.data, fc->map.len)) {
+	case 0: fc->file->flags |= GIT_DIFF_FLAG_NOT_BINARY; break;
+	case 1: fc->file->flags |= GIT_DIFF_FLAG_BINARY; break;
+	default: break;
+	}
+}
+
+static int diff_file_content_init_common(
+	git_diff_file_content *fc, const git_diff_options *opts)
+{
+	fc->opts_flags = opts ? opts->flags : GIT_DIFF_NORMAL;
+
+	if (opts && opts->max_size >= 0)
+		fc->opts_max_size = opts->max_size ?
+			opts->max_size : DIFF_MAX_FILESIZE;
+
+	if (fc->src == GIT_ITERATOR_TYPE_EMPTY)
+		fc->src = GIT_ITERATOR_TYPE_TREE;
+
+	if (!fc->driver &&
+		git_diff_driver_lookup(&fc->driver, fc->repo,
+		    NULL, fc->file->path) < 0)
+		return -1;
+
+	/* give driver a chance to modify options */
+	git_diff_driver_update_options(&fc->opts_flags, fc->driver);
+
+	/* make sure file is conceivable mmap-able */
+	if ((size_t)fc->file->size != fc->file->size)
+		fc->file->flags |= GIT_DIFF_FLAG_BINARY;
+	/* check if user is forcing text diff the file */
+	else if (fc->opts_flags & GIT_DIFF_FORCE_TEXT) {
+		fc->file->flags &= ~GIT_DIFF_FLAG_BINARY;
+		fc->file->flags |= GIT_DIFF_FLAG_NOT_BINARY;
+	}
+	/* check if user is forcing binary diff the file */
+	else if (fc->opts_flags & GIT_DIFF_FORCE_BINARY) {
+		fc->file->flags &= ~GIT_DIFF_FLAG_NOT_BINARY;
+		fc->file->flags |= GIT_DIFF_FLAG_BINARY;
+	}
+
+	diff_file_content_binary_by_size(fc);
+
+	if ((fc->flags & GIT_DIFF_FLAG__NO_DATA) != 0) {
+		fc->flags |= GIT_DIFF_FLAG__LOADED;
+		fc->map.len  = 0;
+		fc->map.data = "";
+	}
+
+	if ((fc->flags & GIT_DIFF_FLAG__LOADED) != 0)
+		diff_file_content_binary_by_content(fc);
+
+	return 0;
+}
+
+int git_diff_file_content__init_from_diff(
+	git_diff_file_content *fc,
+	git_diff *diff,
+	git_diff_delta *delta,
+	bool use_old)
+{
+	bool has_data = true;
+
+	memset(fc, 0, sizeof(*fc));
+	fc->repo = diff->repo;
+	fc->file = use_old ? &delta->old_file : &delta->new_file;
+	fc->src  = use_old ? diff->old_src : diff->new_src;
+
+	if (git_diff_driver_lookup(&fc->driver, fc->repo,
+		    &diff->attrsession, fc->file->path) < 0)
+		return -1;
+
+	switch (delta->status) {
+	case GIT_DELTA_ADDED:
+		has_data = !use_old; break;
+	case GIT_DELTA_DELETED:
+		has_data = use_old; break;
+	case GIT_DELTA_UNTRACKED:
+		has_data = !use_old &&
+			(diff->opts.flags & GIT_DIFF_SHOW_UNTRACKED_CONTENT) != 0;
+		break;
+	case GIT_DELTA_UNREADABLE:
+	case GIT_DELTA_MODIFIED:
+	case GIT_DELTA_COPIED:
+	case GIT_DELTA_RENAMED:
+		break;
+	default:
+		has_data = false;
+		break;
+	}
+
+	if (!has_data)
+		fc->flags |= GIT_DIFF_FLAG__NO_DATA;
+
+	return diff_file_content_init_common(fc, &diff->opts);
+}
+
+int git_diff_file_content__init_from_src(
+	git_diff_file_content *fc,
+	git_repository *repo,
+	const git_diff_options *opts,
+	const git_diff_file_content_src *src,
+	git_diff_file *as_file)
+{
+	memset(fc, 0, sizeof(*fc));
+	fc->repo = repo;
+	fc->file = as_file;
+
+	if (!src->blob && !src->buf) {
+		fc->flags |= GIT_DIFF_FLAG__NO_DATA;
+	} else {
+		fc->flags |= GIT_DIFF_FLAG__LOADED;
+		fc->file->flags |= GIT_DIFF_FLAG_VALID_ID;
+		fc->file->mode = GIT_FILEMODE_BLOB;
+
+		if (src->blob) {
+			git_blob_dup((git_blob **)&fc->blob, (git_blob *) src->blob);
+			fc->file->size = git_blob_rawsize(src->blob);
+			git_oid_cpy(&fc->file->id, git_blob_id(src->blob));
+			fc->file->id_abbrev = GIT_OID_HEXSZ;
+
+			fc->map.len  = (size_t)fc->file->size;
+			fc->map.data = (char *)git_blob_rawcontent(src->blob);
+
+			fc->flags |= GIT_DIFF_FLAG__FREE_BLOB;
+		} else {
+			fc->file->size = src->buflen;
+			git_odb_hash(&fc->file->id, src->buf, src->buflen, GIT_OBJECT_BLOB);
+			fc->file->id_abbrev = GIT_OID_HEXSZ;
+
+			fc->map.len  = src->buflen;
+			fc->map.data = (char *)src->buf;
+		}
+	}
+
+	return diff_file_content_init_common(fc, opts);
+}
+
+static int diff_file_content_commit_to_str(
+	git_diff_file_content *fc, bool check_status)
+{
+	char oid[GIT_OID_HEXSZ+1];
+	git_buf content = GIT_BUF_INIT;
+	const char *status = "";
+
+	if (check_status) {
+		int error = 0;
+		git_submodule *sm = NULL;
+		unsigned int sm_status = 0;
+		const git_oid *sm_head;
+
+		if ((error = git_submodule_lookup(&sm, fc->repo, fc->file->path)) < 0) {
+			/* GIT_EEXISTS means a "submodule" that has not been git added */
+			if (error == GIT_EEXISTS) {
+				git_error_clear();
+				error = 0;
+			}
+			return error;
+		}
+
+		if ((error = git_submodule_status(&sm_status, fc->repo, fc->file->path, GIT_SUBMODULE_IGNORE_UNSPECIFIED)) < 0) {
+			git_submodule_free(sm);
+			return error;
+		}
+
+		/* update OID if we didn't have it previously */
+		if ((fc->file->flags & GIT_DIFF_FLAG_VALID_ID) == 0 &&
+			((sm_head = git_submodule_wd_id(sm)) != NULL ||
+			 (sm_head = git_submodule_head_id(sm)) != NULL))
+		{
+			git_oid_cpy(&fc->file->id, sm_head);
+			fc->file->flags |= GIT_DIFF_FLAG_VALID_ID;
+		}
+
+		if (GIT_SUBMODULE_STATUS_IS_WD_DIRTY(sm_status))
+			status = "-dirty";
+
+		git_submodule_free(sm);
+	}
+
+	git_oid_tostr(oid, sizeof(oid), &fc->file->id);
+	if (git_buf_printf(&content, "Subproject commit %s%s\n", oid, status) < 0)
+		return -1;
+
+	fc->map.len  = git_buf_len(&content);
+	fc->map.data = git_buf_detach(&content);
+	fc->flags |= GIT_DIFF_FLAG__FREE_DATA;
+
+	return 0;
+}
+
+static int diff_file_content_load_blob(
+	git_diff_file_content *fc,
+	git_diff_options *opts)
+{
+	int error = 0;
+	git_odb_object *odb_obj = NULL;
+
+	if (git_oid_is_zero(&fc->file->id))
+		return 0;
+
+	if (fc->file->mode == GIT_FILEMODE_COMMIT)
+		return diff_file_content_commit_to_str(fc, false);
+
+	/* if we don't know size, try to peek at object header first */
+	if (!fc->file->size) {
+		if ((error = git_diff_file__resolve_zero_size(
+				fc->file, &odb_obj, fc->repo)) < 0)
+			return error;
+	}
+
+	if ((opts->flags & GIT_DIFF_SHOW_BINARY) == 0 &&
+		diff_file_content_binary_by_size(fc))
+		return 0;
+
+	if (odb_obj != NULL) {
+		error = git_object__from_odb_object(
+			(git_object **)&fc->blob, fc->repo, odb_obj, GIT_OBJECT_BLOB);
+		git_odb_object_free(odb_obj);
+	} else {
+		error = git_blob_lookup(
+			(git_blob **)&fc->blob, fc->repo, &fc->file->id);
+	}
+
+	if (!error) {
+		fc->flags |= GIT_DIFF_FLAG__FREE_BLOB;
+		fc->map.data = (void *)git_blob_rawcontent(fc->blob);
+		fc->map.len  = (size_t)git_blob_rawsize(fc->blob);
+	}
+
+	return error;
+}
+
+static int diff_file_content_load_workdir_symlink_fake(
+	git_diff_file_content *fc, git_buf *path)
+{
+	git_buf target = GIT_BUF_INIT;
+	int error;
+
+	if ((error = git_futils_readbuffer(&target, path->ptr)) < 0)
+		return error;
+
+	fc->map.len = git_buf_len(&target);
+	fc->map.data = git_buf_detach(&target);
+	fc->flags |= GIT_DIFF_FLAG__FREE_DATA;
+
+	git_buf_dispose(&target);
+	return error;
+}
+
+static int diff_file_content_load_workdir_symlink(
+	git_diff_file_content *fc, git_buf *path)
+{
+	ssize_t alloc_len, read_len;
+	int symlink_supported, error;
+
+	if ((error = git_repository__configmap_lookup(
+		&symlink_supported, fc->repo, GIT_CONFIGMAP_SYMLINKS)) < 0)
+		return -1;
+
+	if (!symlink_supported)
+		return diff_file_content_load_workdir_symlink_fake(fc, path);
+
+	/* link path on disk could be UTF-16, so prepare a buffer that is
+	 * big enough to handle some UTF-8 data expansion
+	 */
+	alloc_len = (ssize_t)(fc->file->size * 2) + 1;
+
+	fc->map.data = git__calloc(alloc_len, sizeof(char));
+	GIT_ERROR_CHECK_ALLOC(fc->map.data);
+
+	fc->flags |= GIT_DIFF_FLAG__FREE_DATA;
+
+	read_len = p_readlink(git_buf_cstr(path), fc->map.data, alloc_len);
+	if (read_len < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to read symlink '%s'", fc->file->path);
+		return -1;
+	}
+
+	fc->map.len = read_len;
+	return 0;
+}
+
+static int diff_file_content_load_workdir_file(
+	git_diff_file_content *fc,
+	git_buf *path,
+	git_diff_options *diff_opts)
+{
+	int error = 0;
+	git_filter_list *fl = NULL;
+	git_file fd = git_futils_open_ro(git_buf_cstr(path));
+	git_buf raw = GIT_BUF_INIT;
+
+	if (fd < 0)
+		return fd;
+
+	if (!fc->file->size)
+	    error = git_futils_filesize(&fc->file->size, fd);
+
+	if (error < 0 || !fc->file->size)
+		goto cleanup;
+
+	if ((diff_opts->flags & GIT_DIFF_SHOW_BINARY) == 0 &&
+		diff_file_content_binary_by_size(fc))
+		goto cleanup;
+
+	if ((error = git_filter_list_load(
+			&fl, fc->repo, NULL, fc->file->path,
+			GIT_FILTER_TO_ODB, GIT_FILTER_ALLOW_UNSAFE)) < 0)
+		goto cleanup;
+
+	/* if there are no filters, try to mmap the file */
+	if (fl == NULL) {
+		if (!(error = git_futils_mmap_ro(
+				&fc->map, fd, 0, (size_t)fc->file->size))) {
+			fc->flags |= GIT_DIFF_FLAG__UNMAP_DATA;
+			goto cleanup;
+		}
+
+		/* if mmap failed, fall through to try readbuffer below */
+		git_error_clear();
+	}
+
+	if (!(error = git_futils_readbuffer_fd(&raw, fd, (size_t)fc->file->size))) {
+		git_buf out = GIT_BUF_INIT;
+
+		error = git_filter_list_apply_to_data(&out, fl, &raw);
+
+		if (out.ptr != raw.ptr)
+			git_buf_dispose(&raw);
+
+		if (!error) {
+			fc->map.len  = out.size;
+			fc->map.data = out.ptr;
+			fc->flags |= GIT_DIFF_FLAG__FREE_DATA;
+		}
+	}
+
+cleanup:
+	git_filter_list_free(fl);
+	p_close(fd);
+
+	return error;
+}
+
+static int diff_file_content_load_workdir(
+	git_diff_file_content *fc,
+	git_diff_options *diff_opts)
+{
+	int error = 0;
+	git_buf path = GIT_BUF_INIT;
+
+	if (fc->file->mode == GIT_FILEMODE_COMMIT)
+		return diff_file_content_commit_to_str(fc, true);
+
+	if (fc->file->mode == GIT_FILEMODE_TREE)
+		return 0;
+
+	if (git_buf_joinpath(
+			&path, git_repository_workdir(fc->repo), fc->file->path) < 0)
+		return -1;
+
+	if (S_ISLNK(fc->file->mode))
+		error = diff_file_content_load_workdir_symlink(fc, &path);
+	else
+		error = diff_file_content_load_workdir_file(fc, &path, diff_opts);
+
+	/* once data is loaded, update OID if we didn't have it previously */
+	if (!error && (fc->file->flags & GIT_DIFF_FLAG_VALID_ID) == 0) {
+		error = git_odb_hash(
+			&fc->file->id, fc->map.data, fc->map.len, GIT_OBJECT_BLOB);
+		fc->file->flags |= GIT_DIFF_FLAG_VALID_ID;
+	}
+
+	git_buf_dispose(&path);
+	return error;
+}
+
+int git_diff_file_content__load(
+	git_diff_file_content *fc,
+	git_diff_options *diff_opts)
+{
+	int error = 0;
+
+	if ((fc->flags & GIT_DIFF_FLAG__LOADED) != 0)
+		return 0;
+
+	if ((fc->file->flags & GIT_DIFF_FLAG_BINARY) != 0 &&
+		(diff_opts->flags & GIT_DIFF_SHOW_BINARY) == 0)
+		return 0;
+
+	if (fc->src == GIT_ITERATOR_TYPE_WORKDIR)
+		error = diff_file_content_load_workdir(fc, diff_opts);
+	else
+		error = diff_file_content_load_blob(fc, diff_opts);
+	if (error)
+		return error;
+
+	fc->flags |= GIT_DIFF_FLAG__LOADED;
+
+	diff_file_content_binary_by_content(fc);
+
+	return 0;
+}
+
+void git_diff_file_content__unload(git_diff_file_content *fc)
+{
+	if ((fc->flags & GIT_DIFF_FLAG__LOADED) == 0)
+		return;
+
+	if (fc->flags & GIT_DIFF_FLAG__FREE_DATA) {
+		git__free(fc->map.data);
+		fc->map.data = "";
+		fc->map.len  = 0;
+		fc->flags &= ~GIT_DIFF_FLAG__FREE_DATA;
+	}
+	else if (fc->flags & GIT_DIFF_FLAG__UNMAP_DATA) {
+		git_futils_mmap_free(&fc->map);
+		fc->map.data = "";
+		fc->map.len  = 0;
+		fc->flags &= ~GIT_DIFF_FLAG__UNMAP_DATA;
+	}
+
+	if (fc->flags & GIT_DIFF_FLAG__FREE_BLOB) {
+		git_blob_free((git_blob *)fc->blob);
+		fc->blob = NULL;
+		fc->flags &= ~GIT_DIFF_FLAG__FREE_BLOB;
+	}
+
+	fc->flags &= ~GIT_DIFF_FLAG__LOADED;
+}
+
+void git_diff_file_content__clear(git_diff_file_content *fc)
+{
+	git_diff_file_content__unload(fc);
+
+	/* for now, nothing else to do */
+}

node_modules/nodegit/vendor/libgit2/src/diff_file.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_diff_file_h__
+#define INCLUDE_diff_file_h__
+
+#include "common.h"
+
+#include "diff.h"
+#include "diff_driver.h"
+#include "map.h"
+
+/* expanded information for one side of a delta */
+typedef struct {
+	git_repository *repo;
+	git_diff_file *file;
+	git_diff_driver *driver;
+	uint32_t flags;
+	uint32_t opts_flags;
+	git_object_size_t opts_max_size;
+	git_iterator_type_t src;
+	const git_blob *blob;
+	git_map map;
+} git_diff_file_content;
+
+extern int git_diff_file_content__init_from_diff(
+	git_diff_file_content *fc,
+	git_diff *diff,
+	git_diff_delta *delta,
+	bool use_old);
+
+typedef struct {
+	const git_blob *blob;
+	const void *buf;
+	size_t buflen;
+	const char *as_path;
+} git_diff_file_content_src;
+
+#define GIT_DIFF_FILE_CONTENT_SRC__BLOB(BLOB,PATH) { (BLOB),NULL,0,(PATH) }
+#define GIT_DIFF_FILE_CONTENT_SRC__BUF(BUF,LEN,PATH) { NULL,(BUF),(LEN),(PATH) }
+
+extern int git_diff_file_content__init_from_src(
+	git_diff_file_content *fc,
+	git_repository *repo,
+	const git_diff_options *opts,
+	const git_diff_file_content_src *src,
+	git_diff_file *as_file);
+
+/* this loads the blob/file-on-disk as needed */
+extern int git_diff_file_content__load(
+	git_diff_file_content *fc,
+	git_diff_options *diff_opts);
+
+/* this releases the blob/file-in-memory */
+extern void git_diff_file_content__unload(git_diff_file_content *fc);
+
+/* this unloads and also releases any other resources */
+extern void git_diff_file_content__clear(git_diff_file_content *fc);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/diff_generate.h

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_diff_generate_h__
+#define INCLUDE_diff_generate_h__
+
+#include "common.h"
+
+#include "diff.h"
+#include "pool.h"
+#include "index.h"
+
+enum {
+	GIT_DIFFCAPS_HAS_SYMLINKS     = (1 << 0), /* symlinks on platform? */
+	GIT_DIFFCAPS_IGNORE_STAT      = (1 << 1), /* use stat? */
+	GIT_DIFFCAPS_TRUST_MODE_BITS  = (1 << 2), /* use st_mode? */
+	GIT_DIFFCAPS_TRUST_CTIME      = (1 << 3), /* use st_ctime? */
+	GIT_DIFFCAPS_USE_DEV          = (1 << 4), /* use st_dev? */
+};
+
+#define DIFF_FLAGS_KNOWN_BINARY (GIT_DIFF_FLAG_BINARY|GIT_DIFF_FLAG_NOT_BINARY)
+#define DIFF_FLAGS_NOT_BINARY   (GIT_DIFF_FLAG_NOT_BINARY|GIT_DIFF_FLAG__NO_DATA)
+
+enum {
+	GIT_DIFF_FLAG__FREE_PATH  = (1 << 7),  /* `path` is allocated memory */
+	GIT_DIFF_FLAG__FREE_DATA  = (1 << 8),  /* internal file data is allocated */
+	GIT_DIFF_FLAG__UNMAP_DATA = (1 << 9),  /* internal file data is mmap'ed */
+	GIT_DIFF_FLAG__NO_DATA    = (1 << 10), /* file data should not be loaded */
+	GIT_DIFF_FLAG__FREE_BLOB  = (1 << 11), /* release the blob when done */
+	GIT_DIFF_FLAG__LOADED     = (1 << 12), /* file data has been loaded */
+
+	GIT_DIFF_FLAG__TO_DELETE  = (1 << 16), /* delete entry during rename det. */
+	GIT_DIFF_FLAG__TO_SPLIT   = (1 << 17), /* split entry during rename det. */
+	GIT_DIFF_FLAG__IS_RENAME_TARGET = (1 << 18),
+	GIT_DIFF_FLAG__IS_RENAME_SOURCE = (1 << 19),
+	GIT_DIFF_FLAG__HAS_SELF_SIMILARITY = (1 << 20),
+};
+
+#define GIT_DIFF_FLAG__CLEAR_INTERNAL(F) (F) = ((F) & 0x00FFFF)
+
+#define GIT_DIFF__VERBOSE  (1 << 30)
+
+extern void git_diff_addref(git_diff *diff);
+
+extern bool git_diff_delta__should_skip(
+	const git_diff_options *opts, const git_diff_delta *delta);
+
+extern int git_diff__from_iterators(
+	git_diff **diff_ptr,
+	git_repository *repo,
+	git_iterator *old_iter,
+	git_iterator *new_iter,
+	const git_diff_options *opts);
+
+extern int git_diff__commit(
+	git_diff **diff, git_repository *repo, const git_commit *commit, const git_diff_options *opts);
+
+extern int git_diff__paired_foreach(
+	git_diff *idx2head,
+	git_diff *wd2idx,
+	int (*cb)(git_diff_delta *i2h, git_diff_delta *w2i, void *payload),
+	void *payload);
+
+/* Merge two `git_diff`s according to the callback given by `cb`. */
+
+typedef git_diff_delta *(*git_diff__merge_cb)(
+	const git_diff_delta *left,
+	const git_diff_delta *right,
+	git_pool *pool);
+
+extern int git_diff__merge(
+	git_diff *onto, const git_diff *from, git_diff__merge_cb cb);
+
+extern git_diff_delta *git_diff__merge_like_cgit(
+	const git_diff_delta *a,
+	const git_diff_delta *b,
+	git_pool *pool);
+
+/* Duplicate a `git_diff_delta` out of the `git_pool` */
+extern git_diff_delta *git_diff__delta_dup(
+	const git_diff_delta *d, git_pool *pool);
+
+extern int git_diff__oid_for_file(
+	git_oid *out,
+	git_diff *diff,
+	const char *path,
+	uint16_t mode,
+	git_object_size_t size);
+
+extern int git_diff__oid_for_entry(
+	git_oid *out,
+	git_diff *diff,
+	const git_index_entry *src,
+	uint16_t mode,
+	const git_oid *update_match);
+
+/*
+ * Sometimes a git_diff_file will have a zero size; this attempts to
+ * fill in the size without loading the blob if possible.  If that is
+ * not possible, then it will return the git_odb_object that had to be
+ * loaded and the caller can use it or dispose of it as needed.
+ */
+GIT_INLINE(int) git_diff_file__resolve_zero_size(
+	git_diff_file *file, git_odb_object **odb_obj, git_repository *repo)
+{
+	int error;
+	git_odb *odb;
+	size_t len;
+	git_object_t type;
+
+	if ((error = git_repository_odb(&odb, repo)) < 0)
+		return error;
+
+	error = git_odb__read_header_or_object(
+		odb_obj, &len, &type, odb, &file->id);
+
+	git_odb_free(odb);
+
+	if (!error)
+		file->size = (git_object_size_t)len;
+
+	return error;
+}
+
+#endif

node_modules/nodegit/vendor/libgit2/src/diff_parse.c

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "diff_parse.h"
+
+#include "diff.h"
+#include "patch.h"
+#include "patch_parse.h"
+
+static void diff_parsed_free(git_diff *d)
+{
+	git_diff_parsed *diff = (git_diff_parsed *)d;
+	git_patch *patch;
+	size_t i;
+
+	git_vector_foreach(&diff->patches, i, patch)
+		git_patch_free(patch);
+
+	git_vector_free(&diff->patches);
+
+	git_vector_free(&diff->base.deltas);
+	git_pool_clear(&diff->base.pool);
+
+	git__memzero(diff, sizeof(*diff));
+	git__free(diff);
+}
+
+static git_diff_parsed *diff_parsed_alloc(void)
+{
+	git_diff_parsed *diff;
+
+	if ((diff = git__calloc(1, sizeof(git_diff_parsed))) == NULL)
+		return NULL;
+
+	GIT_REFCOUNT_INC(&diff->base);
+	diff->base.type = GIT_DIFF_TYPE_PARSED;
+	diff->base.strcomp = git__strcmp;
+	diff->base.strncomp = git__strncmp;
+	diff->base.pfxcomp = git__prefixcmp;
+	diff->base.entrycomp = git_diff__entry_cmp;
+	diff->base.patch_fn = git_patch_parsed_from_diff;
+	diff->base.free_fn = diff_parsed_free;
+
+	if (git_diff_options_init(&diff->base.opts, GIT_DIFF_OPTIONS_VERSION) < 0) {
+		git__free(diff);
+		return NULL;
+	}
+
+	diff->base.opts.flags &= ~GIT_DIFF_IGNORE_CASE;
+
+	git_pool_init(&diff->base.pool, 1);
+
+	if (git_vector_init(&diff->patches, 0, NULL) < 0 ||
+		git_vector_init(&diff->base.deltas, 0, git_diff_delta__cmp) < 0) {
+		git_diff_free(&diff->base);
+		return NULL;
+	}
+
+	git_vector_set_cmp(&diff->base.deltas, git_diff_delta__cmp);
+
+	return diff;
+}
+
+int git_diff_from_buffer(
+	git_diff **out,
+	const char *content,
+	size_t content_len)
+{
+	git_diff_parsed *diff;
+	git_patch *patch;
+	git_patch_parse_ctx *ctx = NULL;
+	int error = 0;
+
+	*out = NULL;
+
+	diff = diff_parsed_alloc();
+	GIT_ERROR_CHECK_ALLOC(diff);
+
+	ctx = git_patch_parse_ctx_init(content, content_len, NULL);
+	GIT_ERROR_CHECK_ALLOC(ctx);
+
+	while (ctx->parse_ctx.remain_len) {
+		if ((error = git_patch_parse(&patch, ctx)) < 0)
+			break;
+
+		git_vector_insert(&diff->patches, patch);
+		git_vector_insert(&diff->base.deltas, patch->delta);
+	}
+
+	if (error == GIT_ENOTFOUND && git_vector_length(&diff->patches) > 0) {
+		git_error_clear();
+		error = 0;
+	}
+
+	git_patch_parse_ctx_free(ctx);
+
+	if (error < 0)
+		git_diff_free(&diff->base);
+	else
+		*out = &diff->base;
+
+	return error;
+}
+

node_modules/nodegit/vendor/libgit2/src/diff_parse.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_diff_parse_h__
+#define INCLUDE_diff_parse_h__
+
+#include "common.h"
+
+#include "diff.h"
+
+typedef struct {
+	struct git_diff base;
+
+	git_vector patches;
+} git_diff_parsed;
+
+#endif

node_modules/nodegit/vendor/libgit2/src/diff_print.c

@@ -0,0 +1,802 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "diff.h"
+#include "diff_file.h"
+#include "patch_generate.h"
+#include "futils.h"
+#include "zstream.h"
+#include "blob.h"
+#include "delta.h"
+#include "git2/sys/diff.h"
+
+typedef struct {
+	git_diff_format_t format;
+	git_diff_line_cb print_cb;
+	void *payload;
+
+	git_buf *buf;
+	git_diff_line line;
+
+	const char *old_prefix;
+	const char *new_prefix;
+	uint32_t flags;
+	int id_strlen;
+
+	int (*strcomp)(const char *, const char *);
+} diff_print_info;
+
+static int diff_print_info_init__common(
+	diff_print_info *pi,
+	git_buf *out,
+	git_repository *repo,
+	git_diff_format_t format,
+	git_diff_line_cb cb,
+	void *payload)
+{
+	pi->format = format;
+	pi->print_cb = cb;
+	pi->payload = payload;
+	pi->buf = out;
+
+	if (!pi->id_strlen) {
+		if (!repo)
+			pi->id_strlen = GIT_ABBREV_DEFAULT;
+		else if (git_repository__configmap_lookup(&pi->id_strlen, repo, GIT_CONFIGMAP_ABBREV) < 0)
+			return -1;
+	}
+
+	if (pi->id_strlen > GIT_OID_HEXSZ)
+		pi->id_strlen = GIT_OID_HEXSZ;
+
+	memset(&pi->line, 0, sizeof(pi->line));
+	pi->line.old_lineno = -1;
+	pi->line.new_lineno = -1;
+	pi->line.num_lines = 1;
+
+	return 0;
+}
+
+static int diff_print_info_init_fromdiff(
+	diff_print_info *pi,
+	git_buf *out,
+	git_diff *diff,
+	git_diff_format_t format,
+	git_diff_line_cb cb,
+	void *payload)
+{
+	git_repository *repo = diff ? diff->repo : NULL;
+
+	memset(pi, 0, sizeof(diff_print_info));
+
+	if (diff) {
+		pi->flags = diff->opts.flags;
+		pi->id_strlen = diff->opts.id_abbrev;
+		pi->old_prefix = diff->opts.old_prefix;
+		pi->new_prefix = diff->opts.new_prefix;
+
+		pi->strcomp = diff->strcomp;
+	}
+
+	return diff_print_info_init__common(pi, out, repo, format, cb, payload);
+}
+
+static int diff_print_info_init_frompatch(
+	diff_print_info *pi,
+	git_buf *out,
+	git_patch *patch,
+	git_diff_format_t format,
+	git_diff_line_cb cb,
+	void *payload)
+{
+	assert(patch);
+
+	memset(pi, 0, sizeof(diff_print_info));
+
+	pi->flags = patch->diff_opts.flags;
+	pi->id_strlen = patch->diff_opts.id_abbrev;
+	pi->old_prefix = patch->diff_opts.old_prefix;
+	pi->new_prefix = patch->diff_opts.new_prefix;
+
+	return diff_print_info_init__common(pi, out, patch->repo, format, cb, payload);
+}
+
+static char diff_pick_suffix(int mode)
+{
+	if (S_ISDIR(mode))
+		return '/';
+	else if (GIT_PERMS_IS_EXEC(mode)) /* -V536 */
+		/* in git, modes are very regular, so we must have 0100755 mode */
+		return '*';
+	else
+		return ' ';
+}
+
+char git_diff_status_char(git_delta_t status)
+{
+	char code;
+
+	switch (status) {
+	case GIT_DELTA_ADDED:      code = 'A'; break;
+	case GIT_DELTA_DELETED:    code = 'D'; break;
+	case GIT_DELTA_MODIFIED:   code = 'M'; break;
+	case GIT_DELTA_RENAMED:    code = 'R'; break;
+	case GIT_DELTA_COPIED:     code = 'C'; break;
+	case GIT_DELTA_IGNORED:    code = 'I'; break;
+	case GIT_DELTA_UNTRACKED:  code = '?'; break;
+	case GIT_DELTA_TYPECHANGE: code = 'T'; break;
+	case GIT_DELTA_UNREADABLE: code = 'X'; break;
+	default:                   code = ' '; break;
+	}
+
+	return code;
+}
+
+static int diff_print_one_name_only(
+	const git_diff_delta *delta, float progress, void *data)
+{
+	diff_print_info *pi = data;
+	git_buf *out = pi->buf;
+
+	GIT_UNUSED(progress);
+
+	if ((pi->flags & GIT_DIFF_SHOW_UNMODIFIED) == 0 &&
+		delta->status == GIT_DELTA_UNMODIFIED)
+		return 0;
+
+	git_buf_clear(out);
+	git_buf_puts(out, delta->new_file.path);
+	git_buf_putc(out, '\n');
+	if (git_buf_oom(out))
+		return -1;
+
+	pi->line.origin      = GIT_DIFF_LINE_FILE_HDR;
+	pi->line.content     = git_buf_cstr(out);
+	pi->line.content_len = git_buf_len(out);
+
+	return pi->print_cb(delta, NULL, &pi->line, pi->payload);
+}
+
+static int diff_print_one_name_status(
+	const git_diff_delta *delta, float progress, void *data)
+{
+	diff_print_info *pi = data;
+	git_buf *out = pi->buf;
+	char old_suffix, new_suffix, code = git_diff_status_char(delta->status);
+	int(*strcomp)(const char *, const char *) = pi->strcomp ?
+		pi->strcomp : git__strcmp;
+
+	GIT_UNUSED(progress);
+
+	if ((pi->flags & GIT_DIFF_SHOW_UNMODIFIED) == 0 && code == ' ')
+		return 0;
+
+	old_suffix = diff_pick_suffix(delta->old_file.mode);
+	new_suffix = diff_pick_suffix(delta->new_file.mode);
+
+	git_buf_clear(out);
+
+	if (delta->old_file.path != delta->new_file.path &&
+		strcomp(delta->old_file.path,delta->new_file.path) != 0)
+		git_buf_printf(out, "%c\t%s%c %s%c\n", code,
+			delta->old_file.path, old_suffix, delta->new_file.path, new_suffix);
+	else if (delta->old_file.mode != delta->new_file.mode &&
+		delta->old_file.mode != 0 && delta->new_file.mode != 0)
+		git_buf_printf(out, "%c\t%s%c %s%c\n", code,
+			delta->old_file.path, old_suffix, delta->new_file.path, new_suffix);
+	else if (old_suffix != ' ')
+		git_buf_printf(out, "%c\t%s%c\n", code, delta->old_file.path, old_suffix);
+	else
+		git_buf_printf(out, "%c\t%s\n", code, delta->old_file.path);
+	if (git_buf_oom(out))
+		return -1;
+
+	pi->line.origin      = GIT_DIFF_LINE_FILE_HDR;
+	pi->line.content     = git_buf_cstr(out);
+	pi->line.content_len = git_buf_len(out);
+
+	return pi->print_cb(delta, NULL, &pi->line, pi->payload);
+}
+
+static int diff_print_one_raw(
+	const git_diff_delta *delta, float progress, void *data)
+{
+	diff_print_info *pi = data;
+	git_buf *out = pi->buf;
+	int id_abbrev;
+	char code = git_diff_status_char(delta->status);
+	char start_oid[GIT_OID_HEXSZ+1], end_oid[GIT_OID_HEXSZ+1];
+
+	GIT_UNUSED(progress);
+
+	if ((pi->flags & GIT_DIFF_SHOW_UNMODIFIED) == 0 && code == ' ')
+		return 0;
+
+	git_buf_clear(out);
+
+	id_abbrev = delta->old_file.mode ? delta->old_file.id_abbrev :
+		delta->new_file.id_abbrev;
+
+	if (pi->id_strlen > id_abbrev) {
+		git_error_set(GIT_ERROR_PATCH,
+			"the patch input contains %d id characters (cannot print %d)",
+			id_abbrev, pi->id_strlen);
+		return -1;
+	}
+
+	git_oid_tostr(start_oid, pi->id_strlen + 1, &delta->old_file.id);
+	git_oid_tostr(end_oid, pi->id_strlen + 1, &delta->new_file.id);
+
+	git_buf_printf(
+		out, (pi->id_strlen <= GIT_OID_HEXSZ) ?
+			":%06o %06o %s... %s... %c" : ":%06o %06o %s %s %c",
+		delta->old_file.mode, delta->new_file.mode, start_oid, end_oid, code);
+
+	if (delta->similarity > 0)
+		git_buf_printf(out, "%03u", delta->similarity);
+
+	if (delta->old_file.path != delta->new_file.path)
+		git_buf_printf(
+			out, "\t%s %s\n", delta->old_file.path, delta->new_file.path);
+	else
+		git_buf_printf(
+			out, "\t%s\n", delta->old_file.path ?
+			delta->old_file.path : delta->new_file.path);
+
+	if (git_buf_oom(out))
+		return -1;
+
+	pi->line.origin      = GIT_DIFF_LINE_FILE_HDR;
+	pi->line.content     = git_buf_cstr(out);
+	pi->line.content_len = git_buf_len(out);
+
+	return pi->print_cb(delta, NULL, &pi->line, pi->payload);
+}
+
+static int diff_print_modes(
+	git_buf *out, const git_diff_delta *delta)
+{
+	git_buf_printf(out, "old mode %o\n", delta->old_file.mode);
+	git_buf_printf(out, "new mode %o\n", delta->new_file.mode);
+
+	return git_buf_oom(out) ? -1 : 0;
+}
+
+static int diff_print_oid_range(
+	git_buf *out, const git_diff_delta *delta, int id_strlen,
+	bool print_index)
+{
+	char start_oid[GIT_OID_HEXSZ+1], end_oid[GIT_OID_HEXSZ+1];
+
+	if (delta->old_file.mode &&
+			id_strlen > delta->old_file.id_abbrev) {
+		git_error_set(GIT_ERROR_PATCH,
+			"the patch input contains %d id characters (cannot print %d)",
+			delta->old_file.id_abbrev, id_strlen);
+		return -1;
+	}
+
+	if ((delta->new_file.mode &&
+			id_strlen > delta->new_file.id_abbrev)) {
+		git_error_set(GIT_ERROR_PATCH,
+			"the patch input contains %d id characters (cannot print %d)",
+			delta->new_file.id_abbrev, id_strlen);
+		return -1;
+	}
+
+	git_oid_tostr(start_oid, id_strlen + 1, &delta->old_file.id);
+	git_oid_tostr(end_oid, id_strlen + 1, &delta->new_file.id);
+
+	if (delta->old_file.mode == delta->new_file.mode) {
+		if (print_index)
+			git_buf_printf(out, "index %s..%s %o\n",
+				start_oid, end_oid, delta->old_file.mode);
+	} else {
+		if (delta->old_file.mode == 0)
+			git_buf_printf(out, "new file mode %o\n", delta->new_file.mode);
+		else if (delta->new_file.mode == 0)
+			git_buf_printf(out, "deleted file mode %o\n", delta->old_file.mode);
+		else
+			diff_print_modes(out, delta);
+
+		if (print_index)
+			git_buf_printf(out, "index %s..%s\n", start_oid, end_oid);
+	}
+
+	return git_buf_oom(out) ? -1 : 0;
+}
+
+static int diff_delta_format_path(
+	git_buf *out, const char *prefix, const char *filename)
+{
+	if (git_buf_joinpath(out, prefix, filename) < 0)
+		return -1;
+
+	return git_buf_quote(out);
+}
+
+static int diff_delta_format_with_paths(
+	git_buf *out,
+	const git_diff_delta *delta,
+	const char *template,
+	const char *oldpath,
+	const char *newpath)
+{
+	if (git_oid_is_zero(&delta->old_file.id))
+		oldpath = "/dev/null";
+
+	if (git_oid_is_zero(&delta->new_file.id))
+		newpath = "/dev/null";
+
+	return git_buf_printf(out, template, oldpath, newpath);
+}
+
+int diff_delta_format_similarity_header(
+	git_buf *out,
+	const git_diff_delta *delta)
+{
+	git_buf old_path = GIT_BUF_INIT, new_path = GIT_BUF_INIT;
+	const char *type;
+	int error = 0;
+
+	if (delta->similarity > 100) {
+		git_error_set(GIT_ERROR_PATCH, "invalid similarity %d", delta->similarity);
+		error = -1;
+		goto done;
+	}
+
+	if (delta->status == GIT_DELTA_RENAMED)
+		type = "rename";
+	else if (delta->status == GIT_DELTA_COPIED)
+		type = "copy";
+	else
+		abort();
+
+	if ((error = git_buf_puts(&old_path, delta->old_file.path)) < 0 ||
+		(error = git_buf_puts(&new_path, delta->new_file.path)) < 0 ||
+		(error = git_buf_quote(&old_path)) < 0 ||
+		(error = git_buf_quote(&new_path)) < 0)
+		goto done;
+
+	git_buf_printf(out,
+		"similarity index %d%%\n"
+		"%s from %s\n"
+		"%s to %s\n",
+		delta->similarity,
+		type, old_path.ptr,
+		type, new_path.ptr);
+
+	if (git_buf_oom(out))
+		error = -1;
+
+done:
+	git_buf_dispose(&old_path);
+	git_buf_dispose(&new_path);
+
+	return error;
+}
+
+static bool delta_is_unchanged(const git_diff_delta *delta)
+{
+	if (git_oid_is_zero(&delta->old_file.id) &&
+		git_oid_is_zero(&delta->new_file.id))
+		return true;
+
+	if (delta->old_file.mode == GIT_FILEMODE_COMMIT ||
+		delta->new_file.mode == GIT_FILEMODE_COMMIT)
+		return false;
+
+	if (git_oid_equal(&delta->old_file.id, &delta->new_file.id))
+		return true;
+
+	return false;
+}
+
+int git_diff_delta__format_file_header(
+	git_buf *out,
+	const git_diff_delta *delta,
+	const char *oldpfx,
+	const char *newpfx,
+	int id_strlen,
+	bool print_index)
+{
+	git_buf old_path = GIT_BUF_INIT, new_path = GIT_BUF_INIT;
+	bool unchanged = delta_is_unchanged(delta);
+	int error = 0;
+
+	if (!oldpfx)
+		oldpfx = DIFF_OLD_PREFIX_DEFAULT;
+	if (!newpfx)
+		newpfx = DIFF_NEW_PREFIX_DEFAULT;
+	if (!id_strlen)
+		id_strlen = GIT_ABBREV_DEFAULT;
+
+	if ((error = diff_delta_format_path(
+			&old_path, oldpfx, delta->old_file.path)) < 0 ||
+		(error = diff_delta_format_path(
+			&new_path, newpfx, delta->new_file.path)) < 0)
+		goto done;
+
+	git_buf_clear(out);
+
+	git_buf_printf(out, "diff --git %s %s\n",
+		old_path.ptr, new_path.ptr);
+
+	if (delta->status == GIT_DELTA_RENAMED ||
+		(delta->status == GIT_DELTA_COPIED && unchanged)) {
+		if ((error = diff_delta_format_similarity_header(out, delta)) < 0)
+			goto done;
+	}
+
+	if (!unchanged) {
+		if ((error = diff_print_oid_range(out, delta,
+						  id_strlen, print_index)) < 0)
+			goto done;
+
+		if ((delta->flags & GIT_DIFF_FLAG_BINARY) == 0)
+			diff_delta_format_with_paths(out, delta,
+				"--- %s\n+++ %s\n", old_path.ptr, new_path.ptr);
+	}
+
+	if (unchanged && delta->old_file.mode != delta->new_file.mode)
+		diff_print_modes(out, delta);
+
+	if (git_buf_oom(out))
+		error = -1;
+
+done:
+	git_buf_dispose(&old_path);
+	git_buf_dispose(&new_path);
+
+	return error;
+}
+
+static int format_binary(
+	diff_print_info *pi,
+	git_diff_binary_t type,
+	const char *data,
+	size_t datalen,
+	size_t inflatedlen)
+{
+	const char *typename = type == GIT_DIFF_BINARY_DELTA ?
+		"delta" : "literal";
+	const char *scan, *end;
+
+	git_buf_printf(pi->buf, "%s %" PRIuZ "\n", typename, inflatedlen);
+	pi->line.num_lines++;
+
+	for (scan = data, end = data + datalen; scan < end; ) {
+		size_t chunk_len = end - scan;
+		if (chunk_len > 52)
+			chunk_len = 52;
+
+		if (chunk_len <= 26)
+			git_buf_putc(pi->buf, (char)chunk_len + 'A' - 1);
+		else
+			git_buf_putc(pi->buf, (char)chunk_len - 26 + 'a' - 1);
+
+		git_buf_encode_base85(pi->buf, scan, chunk_len);
+		git_buf_putc(pi->buf, '\n');
+
+		if (git_buf_oom(pi->buf))
+			return -1;
+
+		scan += chunk_len;
+		pi->line.num_lines++;
+	}
+	git_buf_putc(pi->buf, '\n');
+
+	return 0;
+}
+
+static int diff_print_patch_file_binary_noshow(
+	diff_print_info *pi, git_diff_delta *delta,
+	const char *old_pfx, const char *new_pfx)
+{
+	git_buf old_path = GIT_BUF_INIT, new_path = GIT_BUF_INIT;
+	int error;
+
+	if ((error = diff_delta_format_path(
+			&old_path, old_pfx, delta->old_file.path)) < 0 ||
+		(error = diff_delta_format_path(
+			&new_path, new_pfx, delta->new_file.path)) < 0)
+		goto done;
+
+	pi->line.num_lines = 1;
+	error = diff_delta_format_with_paths(
+		pi->buf, delta, "Binary files %s and %s differ\n",
+		old_path.ptr, new_path.ptr);
+
+done:
+	git_buf_dispose(&old_path);
+	git_buf_dispose(&new_path);
+
+	return error;
+}
+
+static int diff_print_patch_file_binary(
+	diff_print_info *pi, git_diff_delta *delta,
+	const char *old_pfx, const char *new_pfx,
+	const git_diff_binary *binary)
+{
+	size_t pre_binary_size;
+	int error;
+
+	if (delta->status == GIT_DELTA_UNMODIFIED)
+		return 0;
+
+	if ((pi->flags & GIT_DIFF_SHOW_BINARY) == 0 || !binary->contains_data)
+		return diff_print_patch_file_binary_noshow(
+			pi, delta, old_pfx, new_pfx);
+
+	pre_binary_size = pi->buf->size;
+	git_buf_printf(pi->buf, "GIT binary patch\n");
+	pi->line.num_lines++;
+
+	if ((error = format_binary(pi, binary->new_file.type, binary->new_file.data,
+		binary->new_file.datalen, binary->new_file.inflatedlen)) < 0 ||
+		(error = format_binary(pi, binary->old_file.type, binary->old_file.data,
+			binary->old_file.datalen, binary->old_file.inflatedlen)) < 0) {
+
+		if (error == GIT_EBUFS) {
+			git_error_clear();
+			git_buf_truncate(pi->buf, pre_binary_size);
+
+			return diff_print_patch_file_binary_noshow(
+				pi, delta, old_pfx, new_pfx);
+		}
+	}
+
+	pi->line.num_lines++;
+	return error;
+}
+
+static int diff_print_patch_file(
+	const git_diff_delta *delta, float progress, void *data)
+{
+	int error;
+	diff_print_info *pi = data;
+	const char *oldpfx =
+		pi->old_prefix ? pi->old_prefix : DIFF_OLD_PREFIX_DEFAULT;
+	const char *newpfx =
+		pi->new_prefix ? pi->new_prefix : DIFF_NEW_PREFIX_DEFAULT;
+
+	bool binary = (delta->flags & GIT_DIFF_FLAG_BINARY) ||
+		(pi->flags & GIT_DIFF_FORCE_BINARY);
+	bool show_binary = !!(pi->flags & GIT_DIFF_SHOW_BINARY);
+	int id_strlen = pi->id_strlen;
+	bool print_index = (pi->format != GIT_DIFF_FORMAT_PATCH_ID);
+
+	if (binary && show_binary)
+		id_strlen = delta->old_file.id_abbrev ? delta->old_file.id_abbrev :
+			delta->new_file.id_abbrev;
+
+	GIT_UNUSED(progress);
+
+	if (S_ISDIR(delta->new_file.mode) ||
+		delta->status == GIT_DELTA_UNMODIFIED ||
+		delta->status == GIT_DELTA_IGNORED ||
+		delta->status == GIT_DELTA_UNREADABLE ||
+		(delta->status == GIT_DELTA_UNTRACKED &&
+		 (pi->flags & GIT_DIFF_SHOW_UNTRACKED_CONTENT) == 0))
+		return 0;
+
+	if ((error = git_diff_delta__format_file_header(
+			pi->buf, delta, oldpfx, newpfx,
+			id_strlen, print_index)) < 0)
+		return error;
+
+	pi->line.origin      = GIT_DIFF_LINE_FILE_HDR;
+	pi->line.content     = git_buf_cstr(pi->buf);
+	pi->line.content_len = git_buf_len(pi->buf);
+
+	return pi->print_cb(delta, NULL, &pi->line, pi->payload);
+}
+
+static int diff_print_patch_binary(
+	const git_diff_delta *delta,
+	const git_diff_binary *binary,
+	void *data)
+{
+	diff_print_info *pi = data;
+	const char *old_pfx =
+		pi->old_prefix ? pi->old_prefix : DIFF_OLD_PREFIX_DEFAULT;
+	const char *new_pfx =
+		pi->new_prefix ? pi->new_prefix : DIFF_NEW_PREFIX_DEFAULT;
+	int error;
+
+	git_buf_clear(pi->buf);
+
+	if ((error = diff_print_patch_file_binary(
+		pi, (git_diff_delta *)delta, old_pfx, new_pfx, binary)) < 0)
+		return error;
+
+	pi->line.origin = GIT_DIFF_LINE_BINARY;
+	pi->line.content = git_buf_cstr(pi->buf);
+	pi->line.content_len = git_buf_len(pi->buf);
+
+	return pi->print_cb(delta, NULL, &pi->line, pi->payload);
+}
+
+static int diff_print_patch_hunk(
+	const git_diff_delta *d,
+	const git_diff_hunk *h,
+	void *data)
+{
+	diff_print_info *pi = data;
+
+	if (S_ISDIR(d->new_file.mode))
+		return 0;
+
+	pi->line.origin      = GIT_DIFF_LINE_HUNK_HDR;
+	pi->line.content     = h->header;
+	pi->line.content_len = h->header_len;
+
+	return pi->print_cb(d, h, &pi->line, pi->payload);
+}
+
+static int diff_print_patch_line(
+	const git_diff_delta *delta,
+	const git_diff_hunk *hunk,
+	const git_diff_line *line,
+	void *data)
+{
+	diff_print_info *pi = data;
+
+	if (S_ISDIR(delta->new_file.mode))
+		return 0;
+
+	return pi->print_cb(delta, hunk, line, pi->payload);
+}
+
+/* print a git_diff to an output callback */
+int git_diff_print(
+	git_diff *diff,
+	git_diff_format_t format,
+	git_diff_line_cb print_cb,
+	void *payload)
+{
+	int error;
+	git_buf buf = GIT_BUF_INIT;
+	diff_print_info pi;
+	git_diff_file_cb print_file = NULL;
+	git_diff_binary_cb print_binary = NULL;
+	git_diff_hunk_cb print_hunk = NULL;
+	git_diff_line_cb print_line = NULL;
+
+	switch (format) {
+	case GIT_DIFF_FORMAT_PATCH:
+		print_file = diff_print_patch_file;
+		print_binary = diff_print_patch_binary;
+		print_hunk = diff_print_patch_hunk;
+		print_line = diff_print_patch_line;
+		break;
+	case GIT_DIFF_FORMAT_PATCH_ID:
+		print_file = diff_print_patch_file;
+		print_binary = diff_print_patch_binary;
+		print_line = diff_print_patch_line;
+		break;
+	case GIT_DIFF_FORMAT_PATCH_HEADER:
+		print_file = diff_print_patch_file;
+		break;
+	case GIT_DIFF_FORMAT_RAW:
+		print_file = diff_print_one_raw;
+		break;
+	case GIT_DIFF_FORMAT_NAME_ONLY:
+		print_file = diff_print_one_name_only;
+		break;
+	case GIT_DIFF_FORMAT_NAME_STATUS:
+		print_file = diff_print_one_name_status;
+		break;
+	default:
+		git_error_set(GIT_ERROR_INVALID, "unknown diff output format (%d)", format);
+		return -1;
+	}
+
+	if (!(error = diff_print_info_init_fromdiff(
+			&pi, &buf, diff, format, print_cb, payload))) {
+		error = git_diff_foreach(
+			diff, print_file, print_binary, print_hunk, print_line, &pi);
+
+		if (error) /* make sure error message is set */
+			git_error_set_after_callback_function(error, "git_diff_print");
+	}
+
+	git_buf_dispose(&buf);
+
+	return error;
+}
+
+int git_diff_print_callback__to_buf(
+	const git_diff_delta *delta,
+	const git_diff_hunk *hunk,
+	const git_diff_line *line,
+	void *payload)
+{
+	git_buf *output = payload;
+	GIT_UNUSED(delta); GIT_UNUSED(hunk);
+
+	if (!output) {
+		git_error_set(GIT_ERROR_INVALID, "buffer pointer must be provided");
+		return -1;
+	}
+
+	if (line->origin == GIT_DIFF_LINE_ADDITION ||
+		line->origin == GIT_DIFF_LINE_DELETION ||
+		line->origin == GIT_DIFF_LINE_CONTEXT)
+		git_buf_putc(output, line->origin);
+
+	return git_buf_put(output, line->content, line->content_len);
+}
+
+int git_diff_print_callback__to_file_handle(
+	const git_diff_delta *delta,
+	const git_diff_hunk *hunk,
+	const git_diff_line *line,
+	void *payload)
+{
+	FILE *fp = payload ? payload : stdout;
+
+	GIT_UNUSED(delta); GIT_UNUSED(hunk);
+
+	if (line->origin == GIT_DIFF_LINE_CONTEXT ||
+		line->origin == GIT_DIFF_LINE_ADDITION ||
+		line->origin == GIT_DIFF_LINE_DELETION)
+		fputc(line->origin, fp);
+	fwrite(line->content, 1, line->content_len, fp);
+	return 0;
+}
+
+/* print a git_diff to a git_buf */
+int git_diff_to_buf(git_buf *out, git_diff *diff, git_diff_format_t format)
+{
+	assert(out && diff);
+	git_buf_sanitize(out);
+	return git_diff_print(
+		diff, format, git_diff_print_callback__to_buf, out);
+}
+
+/* print a git_patch to an output callback */
+int git_patch_print(
+	git_patch *patch,
+	git_diff_line_cb print_cb,
+	void *payload)
+{
+	int error;
+	git_buf temp = GIT_BUF_INIT;
+	diff_print_info pi;
+
+	assert(patch && print_cb);
+
+	if (!(error = diff_print_info_init_frompatch(
+		&pi, &temp, patch,
+		GIT_DIFF_FORMAT_PATCH, print_cb, payload)))
+	{
+		error = git_patch__invoke_callbacks(
+			patch,
+			diff_print_patch_file, diff_print_patch_binary,
+			diff_print_patch_hunk, diff_print_patch_line,
+			&pi);
+
+		if (error) /* make sure error message is set */
+			git_error_set_after_callback_function(error, "git_patch_print");
+	}
+
+	git_buf_dispose(&temp);
+
+	return error;
+}
+
+/* print a git_patch to a git_buf */
+int git_patch_to_buf(git_buf *out, git_patch *patch)
+{
+	assert(out && patch);
+	git_buf_sanitize(out);
+	return git_patch_print(patch, git_diff_print_callback__to_buf, out);
+}

node_modules/nodegit/vendor/libgit2/src/diff_stats.c

@@ -0,0 +1,362 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "vector.h"
+#include "diff.h"
+#include "patch_generate.h"
+
+#define DIFF_RENAME_FILE_SEPARATOR " => "
+#define STATS_FULL_MIN_SCALE 7
+
+typedef struct {
+	size_t insertions;
+	size_t deletions;
+} diff_file_stats;
+
+struct git_diff_stats {
+	git_diff *diff;
+	diff_file_stats *filestats;
+
+	size_t files_changed;
+	size_t insertions;
+	size_t deletions;
+	size_t renames;
+
+	size_t max_name;
+	size_t max_filestat;
+	int max_digits;
+};
+
+static int digits_for_value(size_t val)
+{
+	int count = 1;
+	size_t placevalue = 10;
+
+	while (val >= placevalue) {
+		++count;
+		placevalue *= 10;
+	}
+
+	return count;
+}
+
+int git_diff_file_stats__full_to_buf(
+	git_buf *out,
+	const git_diff_delta *delta,
+	const diff_file_stats *filestat,
+	const git_diff_stats *stats,
+	size_t width)
+{
+	const char *old_path = NULL, *new_path = NULL;
+	size_t padding;
+	git_object_size_t old_size, new_size;
+
+	old_path = delta->old_file.path;
+	new_path = delta->new_file.path;
+	old_size = delta->old_file.size;
+	new_size = delta->new_file.size;
+
+	if (strcmp(old_path, new_path) != 0) {
+		size_t common_dirlen;
+		int error;
+
+		padding = stats->max_name - strlen(old_path) - strlen(new_path);
+
+		if ((common_dirlen = git_path_common_dirlen(old_path, new_path)) &&
+		    common_dirlen <= INT_MAX) {
+			error = git_buf_printf(out, " %.*s{%s"DIFF_RENAME_FILE_SEPARATOR"%s}",
+					       (int) common_dirlen, old_path,
+					       old_path + common_dirlen,
+					       new_path + common_dirlen);
+		} else {
+			error = git_buf_printf(out, " %s" DIFF_RENAME_FILE_SEPARATOR "%s",
+					       old_path, new_path);
+		}
+
+		if (error < 0)
+			goto on_error;
+	} else {
+		if (git_buf_printf(out, " %s", old_path) < 0)
+			goto on_error;
+
+		padding = stats->max_name - strlen(old_path);
+
+		if (stats->renames > 0)
+			padding += strlen(DIFF_RENAME_FILE_SEPARATOR);
+	}
+
+	if (git_buf_putcn(out, ' ', padding) < 0 ||
+		git_buf_puts(out, " | ") < 0)
+		goto on_error;
+
+	if (delta->flags & GIT_DIFF_FLAG_BINARY) {
+		if (git_buf_printf(out,
+				"Bin %" PRId64 " -> %" PRId64 " bytes", old_size, new_size) < 0)
+			goto on_error;
+	}
+	else {
+		if (git_buf_printf(out,
+				"%*" PRIuZ, stats->max_digits,
+				filestat->insertions + filestat->deletions) < 0)
+			goto on_error;
+
+		if (filestat->insertions || filestat->deletions) {
+			if (git_buf_putc(out, ' ') < 0)
+				goto on_error;
+
+			if (!width) {
+				if (git_buf_putcn(out, '+', filestat->insertions) < 0 ||
+					git_buf_putcn(out, '-', filestat->deletions) < 0)
+					goto on_error;
+			} else {
+				size_t total = filestat->insertions + filestat->deletions;
+				size_t full = (total * width + stats->max_filestat / 2) /
+					stats->max_filestat;
+				size_t plus = full * filestat->insertions / total;
+				size_t minus = full - plus;
+
+				if (git_buf_putcn(out, '+', max(plus,  1)) < 0 ||
+					git_buf_putcn(out, '-', max(minus, 1)) < 0)
+					goto on_error;
+			}
+		}
+	}
+
+	git_buf_putc(out, '\n');
+
+on_error:
+	return (git_buf_oom(out) ? -1 : 0);
+}
+
+int git_diff_file_stats__number_to_buf(
+	git_buf *out,
+	const git_diff_delta *delta,
+	const diff_file_stats *filestats)
+{
+	int error;
+	const char *path = delta->new_file.path;
+
+	if (delta->flags & GIT_DIFF_FLAG_BINARY)
+		error = git_buf_printf(out, "%-8c" "%-8c" "%s\n", '-', '-', path);
+	else
+		error = git_buf_printf(out, "%-8" PRIuZ "%-8" PRIuZ "%s\n",
+			filestats->insertions, filestats->deletions, path);
+
+	return error;
+}
+
+int git_diff_file_stats__summary_to_buf(
+	git_buf *out,
+	const git_diff_delta *delta)
+{
+	if (delta->old_file.mode != delta->new_file.mode) {
+		if (delta->old_file.mode == 0) {
+			git_buf_printf(out, " create mode %06o %s\n",
+				delta->new_file.mode, delta->new_file.path);
+		}
+		else if (delta->new_file.mode == 0) {
+			git_buf_printf(out, " delete mode %06o %s\n",
+				delta->old_file.mode, delta->old_file.path);
+		}
+		else {
+			git_buf_printf(out, " mode change %06o => %06o %s\n",
+				delta->old_file.mode, delta->new_file.mode, delta->new_file.path);
+		}
+	}
+
+	return 0;
+}
+
+int git_diff_get_stats(
+	git_diff_stats **out,
+	git_diff *diff)
+{
+	size_t i, deltas;
+	size_t total_insertions = 0, total_deletions = 0;
+	git_diff_stats *stats = NULL;
+	int error = 0;
+
+	assert(out && diff);
+
+	stats = git__calloc(1, sizeof(git_diff_stats));
+	GIT_ERROR_CHECK_ALLOC(stats);
+
+	deltas = git_diff_num_deltas(diff);
+
+	stats->filestats = git__calloc(deltas, sizeof(diff_file_stats));
+	if (!stats->filestats) {
+		git__free(stats);
+		return -1;
+	}
+
+	stats->diff = diff;
+	GIT_REFCOUNT_INC(diff);
+
+	for (i = 0; i < deltas && !error; ++i) {
+		git_patch *patch = NULL;
+		size_t add = 0, remove = 0, namelen;
+		const git_diff_delta *delta;
+
+		if ((error = git_patch_from_diff(&patch, diff, i)) < 0)
+			break;
+
+		/* keep a count of renames because it will affect formatting */
+		delta = patch->delta;
+
+		/* TODO ugh */
+		namelen = strlen(delta->new_file.path);
+		if (strcmp(delta->old_file.path, delta->new_file.path) != 0) {
+			namelen += strlen(delta->old_file.path);
+			stats->renames++;
+		}
+
+		/* and, of course, count the line stats */
+		error = git_patch_line_stats(NULL, &add, &remove, patch);
+
+		git_patch_free(patch);
+
+		stats->filestats[i].insertions = add;
+		stats->filestats[i].deletions = remove;
+
+		total_insertions += add;
+		total_deletions += remove;
+
+		if (stats->max_name < namelen)
+			stats->max_name = namelen;
+		if (stats->max_filestat < add + remove)
+			stats->max_filestat = add + remove;
+	}
+
+	stats->files_changed = deltas;
+	stats->insertions = total_insertions;
+	stats->deletions = total_deletions;
+	stats->max_digits = digits_for_value(stats->max_filestat + 1);
+
+	if (error < 0) {
+		git_diff_stats_free(stats);
+		stats = NULL;
+	}
+
+	*out = stats;
+	return error;
+}
+
+size_t git_diff_stats_files_changed(
+	const git_diff_stats *stats)
+{
+	assert(stats);
+
+	return stats->files_changed;
+}
+
+size_t git_diff_stats_insertions(
+	const git_diff_stats *stats)
+{
+	assert(stats);
+
+	return stats->insertions;
+}
+
+size_t git_diff_stats_deletions(
+	const git_diff_stats *stats)
+{
+	assert(stats);
+
+	return stats->deletions;
+}
+
+int git_diff_stats_to_buf(
+	git_buf *out,
+	const git_diff_stats *stats,
+	git_diff_stats_format_t format,
+	size_t width)
+{
+	int error = 0;
+	size_t i;
+	const git_diff_delta *delta;
+
+	assert(out && stats);
+
+	if (format & GIT_DIFF_STATS_NUMBER) {
+		for (i = 0; i < stats->files_changed; ++i) {
+			if ((delta = git_diff_get_delta(stats->diff, i)) == NULL)
+				continue;
+
+			error = git_diff_file_stats__number_to_buf(
+				out, delta, &stats->filestats[i]);
+			if (error < 0)
+				return error;
+		}
+	}
+
+	if (format & GIT_DIFF_STATS_FULL) {
+		if (width > 0) {
+			if (width > stats->max_name + stats->max_digits + 5)
+				width -= (stats->max_name + stats->max_digits + 5);
+			if (width < STATS_FULL_MIN_SCALE)
+				width = STATS_FULL_MIN_SCALE;
+		}
+		if (width > stats->max_filestat)
+			width = 0;
+
+		for (i = 0; i < stats->files_changed; ++i) {
+			if ((delta = git_diff_get_delta(stats->diff, i)) == NULL)
+				continue;
+
+			error = git_diff_file_stats__full_to_buf(
+				out, delta, &stats->filestats[i], stats, width);
+			if (error < 0)
+				return error;
+		}
+	}
+
+	if (format & GIT_DIFF_STATS_FULL || format & GIT_DIFF_STATS_SHORT) {
+		git_buf_printf(
+			out, " %" PRIuZ " file%s changed",
+			stats->files_changed, stats->files_changed != 1 ? "s" : "");
+
+		if (stats->insertions || stats->deletions == 0)
+			git_buf_printf(
+				out, ", %" PRIuZ " insertion%s(+)",
+				stats->insertions, stats->insertions != 1 ? "s" : "");
+
+		if (stats->deletions || stats->insertions == 0)
+			git_buf_printf(
+				out, ", %" PRIuZ " deletion%s(-)",
+				stats->deletions, stats->deletions != 1 ? "s" : "");
+
+		git_buf_putc(out, '\n');
+
+		if (git_buf_oom(out))
+			return -1;
+	}
+
+	if (format & GIT_DIFF_STATS_INCLUDE_SUMMARY) {
+		for (i = 0; i < stats->files_changed; ++i) {
+			if ((delta = git_diff_get_delta(stats->diff, i)) == NULL)
+				continue;
+
+			error = git_diff_file_stats__summary_to_buf(out, delta);
+			if (error < 0)
+				return error;
+		}
+	}
+
+	return error;
+}
+
+void git_diff_stats_free(git_diff_stats *stats)
+{
+	if (stats == NULL)
+		return;
+
+	git_diff_free(stats->diff); /* bumped refcount in constructor */
+	git__free(stats->filestats);
+	git__free(stats);
+}

node_modules/nodegit/vendor/libgit2/src/diff_tform.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_diff_tform_h__
+#define INCLUDE_diff_tform_h__
+
+#include "common.h"
+
+#include "diff_file.h"
+
+extern int git_diff_find_similar__hashsig_for_file(
+	void **out, const git_diff_file *f, const char *path, void *p);
+
+extern int git_diff_find_similar__hashsig_for_buf(
+	void **out, const git_diff_file *f, const char *buf, size_t len, void *p);
+
+extern void git_diff_find_similar__hashsig_free(void *sig, void *payload);
+
+extern int git_diff_find_similar__calc_similarity(
+	int *score, void *siga, void *sigb, void *payload);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/diff_xdiff.c

@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "diff_xdiff.h"
+#include "util.h"
+
+#include "git2/errors.h"
+#include "diff.h"
+#include "diff_driver.h"
+#include "patch_generate.h"
+
+static int git_xdiff_scan_int(const char **str, int *value)
+{
+	const char *scan = *str;
+	int v = 0, digits = 0;
+	/* find next digit */
+	for (scan = *str; *scan && !git__isdigit(*scan); scan++);
+	/* parse next number */
+	for (; git__isdigit(*scan); scan++, digits++)
+		v = (v * 10) + (*scan - '0');
+	*str = scan;
+	*value = v;
+	return (digits > 0) ? 0 : -1;
+}
+
+static int git_xdiff_parse_hunk(git_diff_hunk *hunk, const char *header)
+{
+	/* expect something of the form "@@ -%d[,%d] +%d[,%d] @@" */
+	if (*header != '@')
+		goto fail;
+	if (git_xdiff_scan_int(&header, &hunk->old_start) < 0)
+		goto fail;
+	if (*header == ',') {
+		if (git_xdiff_scan_int(&header, &hunk->old_lines) < 0)
+			goto fail;
+	} else
+		hunk->old_lines = 1;
+	if (git_xdiff_scan_int(&header, &hunk->new_start) < 0)
+		goto fail;
+	if (*header == ',') {
+		if (git_xdiff_scan_int(&header, &hunk->new_lines) < 0)
+			goto fail;
+	} else
+		hunk->new_lines = 1;
+	if (hunk->old_start < 0 || hunk->new_start < 0)
+		goto fail;
+
+	return 0;
+
+fail:
+	git_error_set(GIT_ERROR_INVALID, "malformed hunk header from xdiff");
+	return -1;
+}
+
+typedef struct {
+	git_xdiff_output *xo;
+	git_patch_generated *patch;
+	git_diff_hunk hunk;
+	int old_lineno, new_lineno;
+	mmfile_t xd_old_data, xd_new_data;
+} git_xdiff_info;
+
+static int diff_update_lines(
+	git_xdiff_info *info,
+	git_diff_line *line,
+	const char *content,
+	size_t content_len)
+{
+	const char *scan = content, *scan_end = content + content_len;
+
+	for (line->num_lines = 0; scan < scan_end; ++scan)
+		if (*scan == '\n')
+			++line->num_lines;
+
+	line->content     = content;
+	line->content_len = content_len;
+
+	/* expect " "/"-"/"+", then data */
+	switch (line->origin) {
+	case GIT_DIFF_LINE_ADDITION:
+	case GIT_DIFF_LINE_DEL_EOFNL:
+		line->old_lineno = -1;
+		line->new_lineno = info->new_lineno;
+		info->new_lineno += (int)line->num_lines;
+		break;
+	case GIT_DIFF_LINE_DELETION:
+	case GIT_DIFF_LINE_ADD_EOFNL:
+		line->old_lineno = info->old_lineno;
+		line->new_lineno = -1;
+		info->old_lineno += (int)line->num_lines;
+		break;
+	case GIT_DIFF_LINE_CONTEXT:
+	case GIT_DIFF_LINE_CONTEXT_EOFNL:
+		line->old_lineno = info->old_lineno;
+		line->new_lineno = info->new_lineno;
+		info->old_lineno += (int)line->num_lines;
+		info->new_lineno += (int)line->num_lines;
+		break;
+	default:
+		git_error_set(GIT_ERROR_INVALID, "unknown diff line origin %02x",
+			(unsigned int)line->origin);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int git_xdiff_cb(void *priv, mmbuffer_t *bufs, int len)
+{
+	git_xdiff_info *info = priv;
+	git_patch_generated *patch = info->patch;
+	const git_diff_delta *delta = patch->base.delta;
+	git_patch_generated_output *output = &info->xo->output;
+	git_diff_line line;
+	size_t buffer_len;
+
+	if (len == 1) {
+		output->error = git_xdiff_parse_hunk(&info->hunk, bufs[0].ptr);
+		if (output->error < 0)
+			return output->error;
+
+		info->hunk.header_len = bufs[0].size;
+		if (info->hunk.header_len >= sizeof(info->hunk.header))
+			info->hunk.header_len = sizeof(info->hunk.header) - 1;
+
+		/* Sanitize the hunk header in case there is invalid Unicode */
+		buffer_len = git__utf8_valid_buf_length((const uint8_t *) bufs[0].ptr, info->hunk.header_len);
+		/* Sanitizing the hunk header may delete the newline, so add it back again if there is room */
+		if (buffer_len < info->hunk.header_len) {
+			bufs[0].ptr[buffer_len] = '\n';
+			buffer_len += 1;
+			info->hunk.header_len = buffer_len;
+		}
+
+		memcpy(info->hunk.header, bufs[0].ptr, info->hunk.header_len);
+		info->hunk.header[info->hunk.header_len] = '\0';
+
+		if (output->hunk_cb != NULL &&
+			(output->error = output->hunk_cb(
+				delta, &info->hunk, output->payload)))
+			return output->error;
+
+		info->old_lineno = info->hunk.old_start;
+		info->new_lineno = info->hunk.new_start;
+	}
+
+	if (len == 2 || len == 3) {
+		/* expect " "/"-"/"+", then data */
+		line.origin =
+			(*bufs[0].ptr == '+') ? GIT_DIFF_LINE_ADDITION :
+			(*bufs[0].ptr == '-') ? GIT_DIFF_LINE_DELETION :
+			GIT_DIFF_LINE_CONTEXT;
+
+		if (line.origin == GIT_DIFF_LINE_ADDITION)
+			line.content_offset = bufs[1].ptr - info->xd_new_data.ptr;
+		else if (line.origin == GIT_DIFF_LINE_DELETION)
+			line.content_offset = bufs[1].ptr - info->xd_old_data.ptr;
+		else
+			line.content_offset = -1;
+
+		output->error = diff_update_lines(
+			info, &line, bufs[1].ptr, bufs[1].size);
+
+		if (!output->error && output->data_cb != NULL)
+			output->error = output->data_cb(
+				delta, &info->hunk, &line, output->payload);
+	}
+
+	if (len == 3 && !output->error) {
+		/* If we have a '+' and a third buf, then we have added a line
+		 * without a newline and the old code had one, so DEL_EOFNL.
+		 * If we have a '-' and a third buf, then we have removed a line
+		 * with out a newline but added a blank line, so ADD_EOFNL.
+		 */
+		line.origin =
+			(*bufs[0].ptr == '+') ? GIT_DIFF_LINE_DEL_EOFNL :
+			(*bufs[0].ptr == '-') ? GIT_DIFF_LINE_ADD_EOFNL :
+			GIT_DIFF_LINE_CONTEXT_EOFNL;
+
+		line.content_offset = -1;
+
+		output->error = diff_update_lines(
+			info, &line, bufs[2].ptr, bufs[2].size);
+
+		if (!output->error && output->data_cb != NULL)
+			output->error = output->data_cb(
+				delta, &info->hunk, &line, output->payload);
+	}
+
+	return output->error;
+}
+
+static int git_xdiff(git_patch_generated_output *output, git_patch_generated *patch)
+{
+	git_xdiff_output *xo = (git_xdiff_output *)output;
+	git_xdiff_info info;
+	git_diff_find_context_payload findctxt;
+
+	memset(&info, 0, sizeof(info));
+	info.patch = patch;
+	info.xo    = xo;
+
+	xo->callback.priv = &info;
+
+	git_diff_find_context_init(
+		&xo->config.find_func, &findctxt, git_patch_generated_driver(patch));
+	xo->config.find_func_priv = &findctxt;
+
+	if (xo->config.find_func != NULL)
+		xo->config.flags |= XDL_EMIT_FUNCNAMES;
+	else
+		xo->config.flags &= ~XDL_EMIT_FUNCNAMES;
+
+	/* TODO: check ofile.opts_flags to see if driver-specific per-file
+	 * updates are needed to xo->params.flags
+	 */
+
+	git_patch_generated_old_data(&info.xd_old_data.ptr, &info.xd_old_data.size, patch);
+	git_patch_generated_new_data(&info.xd_new_data.ptr, &info.xd_new_data.size, patch);
+
+	if (info.xd_old_data.size > GIT_XDIFF_MAX_SIZE ||
+		info.xd_new_data.size > GIT_XDIFF_MAX_SIZE) {
+		git_error_set(GIT_ERROR_INVALID, "files too large for diff");
+		return -1;
+	}
+
+	xdl_diff(&info.xd_old_data, &info.xd_new_data,
+		&xo->params, &xo->config, &xo->callback);
+
+	git_diff_find_context_clear(&findctxt);
+
+	return xo->output.error;
+}
+
+void git_xdiff_init(git_xdiff_output *xo, const git_diff_options *opts)
+{
+	uint32_t flags = opts ? opts->flags : 0;
+
+	xo->output.diff_cb = git_xdiff;
+
+	xo->config.ctxlen = opts ? opts->context_lines : 3;
+	xo->config.interhunkctxlen = opts ? opts->interhunk_lines : 0;
+
+	if (flags & GIT_DIFF_IGNORE_WHITESPACE)
+		xo->params.flags |= XDF_WHITESPACE_FLAGS;
+	if (flags & GIT_DIFF_IGNORE_WHITESPACE_CHANGE)
+		xo->params.flags |= XDF_IGNORE_WHITESPACE_CHANGE;
+	if (flags & GIT_DIFF_IGNORE_WHITESPACE_EOL)
+		xo->params.flags |= XDF_IGNORE_WHITESPACE_AT_EOL;
+	if (flags & GIT_DIFF_INDENT_HEURISTIC)
+		xo->params.flags |= XDF_INDENT_HEURISTIC;
+
+	if (flags & GIT_DIFF_PATIENCE)
+		xo->params.flags |= XDF_PATIENCE_DIFF;
+	if (flags & GIT_DIFF_MINIMAL)
+		xo->params.flags |= XDF_NEED_MINIMAL;
+
+	xo->callback.outf = git_xdiff_cb;
+}

node_modules/nodegit/vendor/libgit2/src/diff_xdiff.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_diff_xdiff_h__
+#define INCLUDE_diff_xdiff_h__
+
+#include "common.h"
+
+#include "diff.h"
+#include "xdiff/xdiff.h"
+#include "patch_generate.h"
+
+/* xdiff cannot cope with large files.  these files should not be passed to
+ * xdiff.  callers should treat these large files as binary.
+ */
+#define GIT_XDIFF_MAX_SIZE (1024LL * 1024 * 1023)
+
+/* A git_xdiff_output is a git_patch_generate_output with extra fields
+ * necessary to use libxdiff.  Calling git_xdiff_init() will set the diff_cb
+ * field of the output to use xdiff to generate the diffs.
+ */
+typedef struct {
+	git_patch_generated_output output;
+
+	xdemitconf_t config;
+	xpparam_t    params;
+	xdemitcb_t   callback;
+} git_xdiff_output;
+
+void git_xdiff_init(git_xdiff_output *xo, const git_diff_options *opts);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/errors.c

@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "global.h"
+#include "posix.h"
+#include "buffer.h"
+
+/********************************************
+ * New error handling
+ ********************************************/
+
+static git_error g_git_oom_error = {
+	"Out of memory",
+	GIT_ERROR_NOMEMORY
+};
+
+static void set_error_from_buffer(int error_class)
+{
+	git_error *error = &GIT_GLOBAL->error_t;
+	git_buf *buf = &GIT_GLOBAL->error_buf;
+
+	error->message = buf->ptr;
+	error->klass = error_class;
+
+	GIT_GLOBAL->last_error = error;
+}
+
+static void set_error(int error_class, char *string)
+{
+	git_buf *buf = &GIT_GLOBAL->error_buf;
+
+	git_buf_clear(buf);
+	if (string) {
+		git_buf_puts(buf, string);
+		git__free(string);
+	}
+
+	set_error_from_buffer(error_class);
+}
+
+void git_error_set_oom(void)
+{
+	GIT_GLOBAL->last_error = &g_git_oom_error;
+}
+
+void git_error_set(int error_class, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	git_error_vset(error_class, fmt, ap);
+	va_end(ap);
+}
+
+void git_error_vset(int error_class, const char *fmt, va_list ap)
+{
+#ifdef GIT_WIN32
+	DWORD win32_error_code = (error_class == GIT_ERROR_OS) ? GetLastError() : 0;
+#endif
+	int error_code = (error_class == GIT_ERROR_OS) ? errno : 0;
+	git_buf *buf = &GIT_GLOBAL->error_buf;
+
+	git_buf_clear(buf);
+	if (fmt) {
+		git_buf_vprintf(buf, fmt, ap);
+		if (error_class == GIT_ERROR_OS)
+			git_buf_PUTS(buf, ": ");
+	}
+
+	if (error_class == GIT_ERROR_OS) {
+#ifdef GIT_WIN32
+		char * win32_error = git_win32_get_error_message(win32_error_code);
+		if (win32_error) {
+			git_buf_puts(buf, win32_error);
+			git__free(win32_error);
+
+			SetLastError(0);
+		}
+		else
+#endif
+		if (error_code)
+			git_buf_puts(buf, strerror(error_code));
+
+		if (error_code)
+			errno = 0;
+	}
+
+	if (!git_buf_oom(buf))
+		set_error_from_buffer(error_class);
+}
+
+void git_error_set_str(int error_class, const char *string)
+{
+	git_buf *buf = &GIT_GLOBAL->error_buf;
+
+	assert(string);
+
+	if (!string)
+		return;
+
+	git_buf_clear(buf);
+	git_buf_puts(buf, string);
+	if (!git_buf_oom(buf))
+		set_error_from_buffer(error_class);
+}
+
+void git_error_clear(void)
+{
+	if (GIT_GLOBAL->last_error != NULL) {
+		set_error(0, NULL);
+		GIT_GLOBAL->last_error = NULL;
+	}
+
+	errno = 0;
+#ifdef GIT_WIN32
+	SetLastError(0);
+#endif
+}
+
+const git_error *git_error_last(void)
+{
+	return GIT_GLOBAL->last_error;
+}
+
+int git_error_state_capture(git_error_state *state, int error_code)
+{
+	git_error *error = GIT_GLOBAL->last_error;
+	git_buf *error_buf = &GIT_GLOBAL->error_buf;
+
+	memset(state, 0, sizeof(git_error_state));
+
+	if (!error_code)
+		return 0;
+
+	state->error_code = error_code;
+	state->oom = (error == &g_git_oom_error);
+
+	if (error) {
+		state->error_msg.klass = error->klass;
+
+		if (state->oom)
+			state->error_msg.message = g_git_oom_error.message;
+		else
+			state->error_msg.message = git_buf_detach(error_buf);
+	}
+
+	git_error_clear();
+	return error_code;
+}
+
+int git_error_state_restore(git_error_state *state)
+{
+	int ret = 0;
+
+	git_error_clear();
+
+	if (state && state->error_msg.message) {
+		if (state->oom)
+			git_error_set_oom();
+		else
+			set_error(state->error_msg.klass, state->error_msg.message);
+
+		ret = state->error_code;
+		memset(state, 0, sizeof(git_error_state));
+	}
+
+	return ret;
+}
+
+void git_error_state_free(git_error_state *state)
+{
+	if (!state)
+		return;
+
+	if (!state->oom)
+		git__free(state->error_msg.message);
+
+	memset(state, 0, sizeof(git_error_state));
+}
+
+int git_error_system_last(void)
+{
+#ifdef GIT_WIN32
+	return GetLastError();
+#else
+	return errno;
+#endif
+}
+
+void git_error_system_set(int code)
+{
+#ifdef GIT_WIN32
+	SetLastError(code);
+#else
+	errno = code;
+#endif
+}
+
+/* Deprecated error values and functions */
+
+const git_error *giterr_last(void)
+{
+	return git_error_last();
+}
+
+void giterr_clear(void)
+{
+	git_error_clear();
+}
+
+void giterr_set_str(int error_class, const char *string)
+{
+	git_error_set_str(error_class, string);
+}
+
+void giterr_set_oom(void)
+{
+	git_error_set_oom();
+}

node_modules/nodegit/vendor/libgit2/src/errors.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_errors_h__
+#define INCLUDE_errors_h__
+
+#include "common.h"
+
+/*
+ * Set the error message for this thread, formatting as needed.
+ */
+void git_error_set(int error_class, const char *fmt, ...) GIT_FORMAT_PRINTF(2, 3);
+void git_error_vset(int error_class, const char *fmt, va_list ap);
+
+/**
+ * Set error message for user callback if needed.
+ *
+ * If the error code in non-zero and no error message is set, this
+ * sets a generic error message.
+ *
+ * @return This always returns the `error_code` parameter.
+ */
+GIT_INLINE(int) git_error_set_after_callback_function(
+	int error_code, const char *action)
+{
+	if (error_code) {
+		const git_error *e = git_error_last();
+		if (!e || !e->message)
+			git_error_set(e ? e->klass : GIT_ERROR_CALLBACK,
+				"%s callback returned %d", action, error_code);
+	}
+	return error_code;
+}
+
+#ifdef GIT_WIN32
+#define git_error_set_after_callback(code) \
+	git_error_set_after_callback_function((code), __FUNCTION__)
+#else
+#define git_error_set_after_callback(code) \
+	git_error_set_after_callback_function((code), __func__)
+#endif
+
+/**
+ * Gets the system error code for this thread.
+ */
+int git_error_system_last(void);
+
+/**
+ * Sets the system error code for this thread.
+ */
+void git_error_system_set(int code);
+
+/**
+ * Structure to preserve libgit2 error state
+ */
+typedef struct {
+	int error_code;
+	unsigned int oom : 1;
+	git_error error_msg;
+} git_error_state;
+
+/**
+ * Capture current error state to restore later, returning error code.
+ * If `error_code` is zero, this does not clear the current error state.
+ * You must either restore this error state, or free it.
+ */
+extern int git_error_state_capture(git_error_state *state, int error_code);
+
+/**
+ * Restore error state to a previous value, returning saved error code.
+ */
+extern int git_error_state_restore(git_error_state *state);
+
+/** Free an error state. */
+extern void git_error_state_free(git_error_state *state);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/features.h.in

@@ -0,0 +1,44 @@
+#ifndef INCLUDE_features_h__
+#define INCLUDE_features_h__
+
+#cmakedefine GIT_DEBUG_POOL 1
+#cmakedefine GIT_TRACE 1
+#cmakedefine GIT_THREADS 1
+#cmakedefine GIT_MSVC_CRTDBG 1
+
+#cmakedefine GIT_ARCH_64 1
+#cmakedefine GIT_ARCH_32 1
+
+#cmakedefine GIT_USE_ICONV 1
+#cmakedefine GIT_USE_NSEC 1
+#cmakedefine GIT_USE_STAT_MTIM 1
+#cmakedefine GIT_USE_STAT_MTIMESPEC 1
+#cmakedefine GIT_USE_STAT_MTIME_NSEC 1
+#cmakedefine GIT_USE_FUTIMENS 1
+
+#cmakedefine GIT_REGEX_REGCOMP_L
+#cmakedefine GIT_REGEX_REGCOMP
+#cmakedefine GIT_REGEX_PCRE
+#cmakedefine GIT_REGEX_PCRE2
+#cmakedefine GIT_REGEX_BUILTIN 1
+
+#cmakedefine GIT_SSH 1
+#cmakedefine GIT_SSH_MEMORY_CREDENTIALS 1
+
+#cmakedefine GIT_NTLM 1
+#cmakedefine GIT_GSSAPI 1
+#cmakedefine GIT_GSSFRAMEWORK 1
+
+#cmakedefine GIT_WINHTTP 1
+#cmakedefine GIT_HTTPS 1
+#cmakedefine GIT_OPENSSL 1
+#cmakedefine GIT_SECURE_TRANSPORT 1
+#cmakedefine GIT_MBEDTLS 1
+
+#cmakedefine GIT_SHA1_COLLISIONDETECT 1
+#cmakedefine GIT_SHA1_WIN32 1
+#cmakedefine GIT_SHA1_COMMON_CRYPTO 1
+#cmakedefine GIT_SHA1_OPENSSL 1
+#cmakedefine GIT_SHA1_MBEDTLS 1
+
+#endif

node_modules/nodegit/vendor/libgit2/src/fetch.c

@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "fetch.h"
+
+#include "git2/oid.h"
+#include "git2/refs.h"
+#include "git2/revwalk.h"
+#include "git2/transport.h"
+
+#include "remote.h"
+#include "refspec.h"
+#include "pack.h"
+#include "netops.h"
+#include "repository.h"
+#include "refs.h"
+
+static int maybe_want(git_remote *remote, git_remote_head *head, git_odb *odb, git_refspec *tagspec, git_remote_autotag_option_t tagopt)
+{
+	int match = 0;
+
+	if (!git_reference_is_valid_name(head->name))
+		return 0;
+
+	if (tagopt == GIT_REMOTE_DOWNLOAD_TAGS_ALL) {
+		/*
+		 * If tagopt is --tags, always request tags
+		 * in addition to the remote's refspecs
+		 */
+		if (git_refspec_src_matches(tagspec, head->name))
+			match = 1;
+	}
+
+	if (!match && git_remote__matching_refspec(remote, head->name))
+		match = 1;
+
+	if (!match)
+		return 0;
+
+	/* If we have the object, mark it so we don't ask for it */
+	if (git_odb_exists(odb, &head->oid)) {
+		head->local = 1;
+	}
+	else
+		remote->need_pack = 1;
+
+	return git_vector_insert(&remote->refs, head);
+}
+
+static int filter_wants(git_remote *remote, const git_fetch_options *opts)
+{
+	git_remote_head **heads;
+	git_refspec tagspec, head;
+	int error = 0;
+	git_odb *odb;
+	size_t i, heads_len;
+	git_remote_autotag_option_t tagopt = remote->download_tags;
+
+	if (opts && opts->download_tags != GIT_REMOTE_DOWNLOAD_TAGS_UNSPECIFIED)
+		tagopt = opts->download_tags;
+
+	git_vector_clear(&remote->refs);
+	if ((error = git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true)) < 0)
+		return error;
+
+	/*
+	 * The fetch refspec can be NULL, and what this means is that the
+	 * user didn't specify one. This is fine, as it means that we're
+	 * not interested in any particular branch but just the remote's
+	 * HEAD, which will be stored in FETCH_HEAD after the fetch.
+	 */
+	if (remote->active_refspecs.length == 0) {
+		if ((error = git_refspec__parse(&head, "HEAD", true)) < 0)
+			goto cleanup;
+
+		error = git_refspec__dwim_one(&remote->active_refspecs, &head, &remote->refs);
+		git_refspec__dispose(&head);
+
+		if (error < 0)
+			goto cleanup;
+	}
+
+	if (git_repository_odb__weakptr(&odb, remote->repo) < 0)
+		goto cleanup;
+
+	if (git_remote_ls((const git_remote_head ***)&heads, &heads_len, remote) < 0)
+		goto cleanup;
+
+	for (i = 0; i < heads_len; i++) {
+		if ((error = maybe_want(remote, heads[i], odb, &tagspec, tagopt)) < 0)
+			break;
+	}
+
+cleanup:
+	git_refspec__dispose(&tagspec);
+
+	return error;
+}
+
+/*
+ * In this first version, we push all our refs in and start sending
+ * them out. When we get an ACK we hide that commit and continue
+ * traversing until we're done
+ */
+int git_fetch_negotiate(git_remote *remote, const git_fetch_options *opts)
+{
+	git_transport *t = remote->transport;
+
+	remote->need_pack = 0;
+
+	if (filter_wants(remote, opts) < 0) {
+		git_error_set(GIT_ERROR_NET, "failed to filter the reference list for wants");
+		return -1;
+	}
+
+	/* Don't try to negotiate when we don't want anything */
+	if (!remote->need_pack)
+		return 0;
+
+	/*
+	 * Now we have everything set up so we can start tell the
+	 * server what we want and what we have.
+	 */
+	return t->negotiate_fetch(t,
+		remote->repo,
+		(const git_remote_head * const *)remote->refs.contents,
+		remote->refs.length);
+}
+
+int git_fetch_download_pack(git_remote *remote, const git_remote_callbacks *callbacks)
+{
+	git_transport *t = remote->transport;
+	git_indexer_progress_cb progress = NULL;
+	void *payload = NULL;
+
+	if (!remote->need_pack)
+		return 0;
+
+	if (callbacks) {
+		progress = callbacks->transfer_progress;
+		payload  = callbacks->payload;
+	}
+
+	return t->download_pack(t, remote->repo, &remote->stats, progress, payload);
+}
+
+int git_fetch_options_init(git_fetch_options *opts, unsigned int version)
+{
+	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+		opts, version, git_fetch_options, GIT_FETCH_OPTIONS_INIT);
+	return 0;
+}
+
+int git_fetch_init_options(git_fetch_options *opts, unsigned int version)
+{
+	return git_fetch_options_init(opts, version);
+}

node_modules/nodegit/vendor/libgit2/src/fetch.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_fetch_h__
+#define INCLUDE_fetch_h__
+
+#include "common.h"
+
+#include "git2/remote.h"
+
+#include "netops.h"
+
+int git_fetch_negotiate(git_remote *remote, const git_fetch_options *opts);
+
+int git_fetch_download_pack(git_remote *remote, const git_remote_callbacks *callbacks);
+
+int git_fetch_setup_walk(git_revwalk **out, git_repository *repo);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/fetchhead.c

@@ -0,0 +1,302 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "fetchhead.h"
+
+#include "git2/types.h"
+#include "git2/oid.h"
+
+#include "buffer.h"
+#include "futils.h"
+#include "filebuf.h"
+#include "refs.h"
+#include "repository.h"
+
+int git_fetchhead_ref_cmp(const void *a, const void *b)
+{
+	const git_fetchhead_ref *one = (const git_fetchhead_ref *)a;
+	const git_fetchhead_ref *two = (const git_fetchhead_ref *)b;
+
+	if (one->is_merge && !two->is_merge)
+		return -1;
+	if (two->is_merge && !one->is_merge)
+		return 1;
+
+	if (one->ref_name && two->ref_name)
+		return strcmp(one->ref_name, two->ref_name);
+	else if (one->ref_name)
+		return -1;
+	else if (two->ref_name)
+		return 1;
+
+	return 0;
+}
+
+int git_fetchhead_ref_create(
+	git_fetchhead_ref **out,
+	git_oid *oid,
+	unsigned int is_merge,
+	const char *ref_name,
+	const char *remote_url)
+{
+	git_fetchhead_ref *fetchhead_ref;
+
+	assert(out && oid);
+
+	*out = NULL;
+
+	fetchhead_ref = git__malloc(sizeof(git_fetchhead_ref));
+	GIT_ERROR_CHECK_ALLOC(fetchhead_ref);
+
+	memset(fetchhead_ref, 0x0, sizeof(git_fetchhead_ref));
+
+	git_oid_cpy(&fetchhead_ref->oid, oid);
+	fetchhead_ref->is_merge = is_merge;
+
+	if (ref_name)
+		fetchhead_ref->ref_name = git__strdup(ref_name);
+
+	if (remote_url)
+		fetchhead_ref->remote_url = git__strdup(remote_url);
+
+	*out = fetchhead_ref;
+
+	return 0;
+}
+
+static int fetchhead_ref_write(
+	git_filebuf *file,
+	git_fetchhead_ref *fetchhead_ref)
+{
+	char oid[GIT_OID_HEXSZ + 1];
+	const char *type, *name;
+	int head = 0;
+
+	assert(file && fetchhead_ref);
+
+	git_oid_fmt(oid, &fetchhead_ref->oid);
+	oid[GIT_OID_HEXSZ] = '\0';
+
+	if (git__prefixcmp(fetchhead_ref->ref_name, GIT_REFS_HEADS_DIR) == 0) {
+		type = "branch ";
+		name = fetchhead_ref->ref_name + strlen(GIT_REFS_HEADS_DIR);
+	} else if(git__prefixcmp(fetchhead_ref->ref_name,
+		GIT_REFS_TAGS_DIR) == 0) {
+		type = "tag ";
+		name = fetchhead_ref->ref_name + strlen(GIT_REFS_TAGS_DIR);
+	} else if (!git__strcmp(fetchhead_ref->ref_name, GIT_HEAD_FILE)) {
+		head = 1;
+	} else {
+		type = "";
+		name = fetchhead_ref->ref_name;
+	}
+
+	if (head)
+		return git_filebuf_printf(file, "%s\t\t%s\n", oid, fetchhead_ref->remote_url);
+
+	return git_filebuf_printf(file, "%s\t%s\t%s'%s' of %s\n",
+		oid,
+		(fetchhead_ref->is_merge) ? "" : "not-for-merge",
+		type,
+		name,
+		fetchhead_ref->remote_url);
+}
+
+int git_fetchhead_write(git_repository *repo, git_vector *fetchhead_refs)
+{
+	git_filebuf file = GIT_FILEBUF_INIT;
+	git_buf path = GIT_BUF_INIT;
+	unsigned int i;
+	git_fetchhead_ref *fetchhead_ref;
+
+	assert(repo && fetchhead_refs);
+
+	if (git_buf_joinpath(&path, repo->gitdir, GIT_FETCH_HEAD_FILE) < 0)
+		return -1;
+
+	if (git_filebuf_open(&file, path.ptr, GIT_FILEBUF_APPEND, GIT_REFS_FILE_MODE) < 0) {
+		git_buf_dispose(&path);
+		return -1;
+	}
+
+	git_buf_dispose(&path);
+
+	git_vector_sort(fetchhead_refs);
+
+	git_vector_foreach(fetchhead_refs, i, fetchhead_ref)
+		fetchhead_ref_write(&file, fetchhead_ref);
+
+	return git_filebuf_commit(&file);
+}
+
+static int fetchhead_ref_parse(
+	git_oid *oid,
+	unsigned int *is_merge,
+	git_buf *ref_name,
+	const char **remote_url,
+	char *line,
+	size_t line_num)
+{
+	char *oid_str, *is_merge_str, *desc, *name = NULL;
+	const char *type = NULL;
+	int error = 0;
+
+	*remote_url = NULL;
+
+	if (!*line) {
+		git_error_set(GIT_ERROR_FETCHHEAD,
+			"empty line in FETCH_HEAD line %"PRIuZ, line_num);
+		return -1;
+	}
+
+	/* Compat with old git clients that wrote FETCH_HEAD like a loose ref. */
+	if ((oid_str = git__strsep(&line, "\t")) == NULL) {
+		oid_str = line;
+		line += strlen(line);
+
+		*is_merge = 1;
+	}
+
+	if (strlen(oid_str) != GIT_OID_HEXSZ) {
+		git_error_set(GIT_ERROR_FETCHHEAD,
+			"invalid object ID in FETCH_HEAD line %"PRIuZ, line_num);
+		return -1;
+	}
+
+	if (git_oid_fromstr(oid, oid_str) < 0) {
+		const git_error *oid_err = git_error_last();
+		const char *err_msg = oid_err ? oid_err->message : "invalid object ID";
+
+		git_error_set(GIT_ERROR_FETCHHEAD, "%s in FETCH_HEAD line %"PRIuZ,
+			err_msg, line_num);
+		return -1;
+	}
+
+	/* Parse new data from newer git clients */
+	if (*line) {
+		if ((is_merge_str = git__strsep(&line, "\t")) == NULL) {
+			git_error_set(GIT_ERROR_FETCHHEAD,
+				"invalid description data in FETCH_HEAD line %"PRIuZ, line_num);
+			return -1;
+		}
+
+		if (*is_merge_str == '\0')
+			*is_merge = 1;
+		else if (strcmp(is_merge_str, "not-for-merge") == 0)
+			*is_merge = 0;
+		else {
+			git_error_set(GIT_ERROR_FETCHHEAD,
+				"invalid for-merge entry in FETCH_HEAD line %"PRIuZ, line_num);
+			return -1;
+		}
+
+		if ((desc = line) == NULL) {
+			git_error_set(GIT_ERROR_FETCHHEAD,
+				"invalid description in FETCH_HEAD line %"PRIuZ, line_num);
+			return -1;
+		}
+
+		if (git__prefixcmp(desc, "branch '") == 0) {
+			type = GIT_REFS_HEADS_DIR;
+			name = desc + 8;
+		} else if (git__prefixcmp(desc, "tag '") == 0) {
+			type = GIT_REFS_TAGS_DIR;
+			name = desc + 5;
+		} else if (git__prefixcmp(desc, "'") == 0)
+			name = desc + 1;
+
+		if (name) {
+			if ((desc = strstr(name, "' ")) == NULL ||
+				git__prefixcmp(desc, "' of ") != 0) {
+				git_error_set(GIT_ERROR_FETCHHEAD,
+					"invalid description in FETCH_HEAD line %"PRIuZ, line_num);
+				return -1;
+			}
+
+			*desc = '\0';
+			desc += 5;
+		}
+
+		*remote_url = desc;
+	}
+
+	git_buf_clear(ref_name);
+
+	if (type)
+		git_buf_join(ref_name, '/', type, name);
+	else if(name)
+		git_buf_puts(ref_name, name);
+
+	return error;
+}
+
+int git_repository_fetchhead_foreach(git_repository *repo,
+	git_repository_fetchhead_foreach_cb cb,
+	void *payload)
+{
+	git_buf path = GIT_BUF_INIT, file = GIT_BUF_INIT, name = GIT_BUF_INIT;
+	const char *ref_name;
+	git_oid oid;
+	const char *remote_url;
+	unsigned int is_merge = 0;
+	char *buffer, *line;
+	size_t line_num = 0;
+	int error = 0;
+
+	assert(repo && cb);
+
+	if (git_buf_joinpath(&path, repo->gitdir, GIT_FETCH_HEAD_FILE) < 0)
+		return -1;
+
+	if ((error = git_futils_readbuffer(&file, git_buf_cstr(&path))) < 0)
+		goto done;
+
+	buffer = file.ptr;
+
+	while ((line = git__strsep(&buffer, "\n")) != NULL) {
+		++line_num;
+
+		if ((error = fetchhead_ref_parse(
+				&oid, &is_merge, &name, &remote_url, line, line_num)) < 0)
+			goto done;
+
+		if (git_buf_len(&name) > 0)
+			ref_name = git_buf_cstr(&name);
+		else
+			ref_name = NULL;
+
+		error = cb(ref_name, remote_url, &oid, is_merge, payload);
+		if (error) {
+			git_error_set_after_callback(error);
+			goto done;
+		}
+	}
+
+	if (*buffer) {
+		git_error_set(GIT_ERROR_FETCHHEAD, "no EOL at line %"PRIuZ, line_num+1);
+		error = -1;
+		goto done;
+	}
+
+done:
+	git_buf_dispose(&file);
+	git_buf_dispose(&path);
+	git_buf_dispose(&name);
+
+	return error;
+}
+
+void git_fetchhead_ref_free(git_fetchhead_ref *fetchhead_ref)
+{
+	if (fetchhead_ref == NULL)
+		return;
+
+	git__free(fetchhead_ref->remote_url);
+	git__free(fetchhead_ref->ref_name);
+	git__free(fetchhead_ref);
+}
+

node_modules/nodegit/vendor/libgit2/src/fetchhead.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_fetchhead_h__
+#define INCLUDE_fetchhead_h__
+
+#include "common.h"
+
+#include "oid.h"
+#include "vector.h"
+
+typedef struct git_fetchhead_ref {
+	git_oid oid;
+	unsigned int is_merge;
+	char *ref_name;
+	char *remote_url;
+} git_fetchhead_ref;
+
+int git_fetchhead_ref_create(
+	git_fetchhead_ref **fetchhead_ref_out,
+	git_oid *oid,
+	unsigned int is_merge,
+	const char *ref_name,
+	const char *remote_url);
+
+int git_fetchhead_ref_cmp(const void *a, const void *b);
+
+int git_fetchhead_write(git_repository *repo, git_vector *fetchhead_refs);
+
+void git_fetchhead_ref_free(git_fetchhead_ref *fetchhead_ref);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/filebuf.c

@@ -0,0 +1,593 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "filebuf.h"
+
+#include "futils.h"
+
+static const size_t WRITE_BUFFER_SIZE = (4096 * 2);
+
+enum buferr_t {
+	BUFERR_OK = 0,
+	BUFERR_WRITE,
+	BUFERR_ZLIB,
+	BUFERR_MEM
+};
+
+#define ENSURE_BUF_OK(buf) if ((buf)->last_error != BUFERR_OK) { return -1; }
+
+static int verify_last_error(git_filebuf *file)
+{
+	switch (file->last_error) {
+	case BUFERR_WRITE:
+		git_error_set(GIT_ERROR_OS, "failed to write out file");
+		return -1;
+
+	case BUFERR_MEM:
+		git_error_set_oom();
+		return -1;
+
+	case BUFERR_ZLIB:
+		git_error_set(GIT_ERROR_ZLIB,
+			"Buffer error when writing out ZLib data");
+		return -1;
+
+	default:
+		return 0;
+	}
+}
+
+static int lock_file(git_filebuf *file, int flags, mode_t mode)
+{
+	if (git_path_exists(file->path_lock) == true) {
+		git_error_clear(); /* actual OS error code just confuses */
+		git_error_set(GIT_ERROR_OS,
+			"failed to lock file '%s' for writing", file->path_lock);
+		return GIT_ELOCKED;
+	}
+
+	/* create path to the file buffer is required */
+	if (flags & GIT_FILEBUF_CREATE_LEADING_DIRS) {
+		/* XXX: Should dirmode here be configurable? Or is 0777 always fine? */
+		file->fd = git_futils_creat_locked_withpath(file->path_lock, 0777, mode);
+	} else {
+		file->fd = git_futils_creat_locked(file->path_lock, mode);
+	}
+
+	if (file->fd < 0)
+		return file->fd;
+
+	file->fd_is_open = true;
+
+	if ((flags & GIT_FILEBUF_APPEND) && git_path_exists(file->path_original) == true) {
+		git_file source;
+		char buffer[FILEIO_BUFSIZE];
+		ssize_t read_bytes;
+		int error = 0;
+
+		source = p_open(file->path_original, O_RDONLY);
+		if (source < 0) {
+			git_error_set(GIT_ERROR_OS,
+				"failed to open file '%s' for reading",
+				file->path_original);
+			return -1;
+		}
+
+		while ((read_bytes = p_read(source, buffer, sizeof(buffer))) > 0) {
+			if ((error = p_write(file->fd, buffer, read_bytes)) < 0)
+				break;
+			if (file->compute_digest)
+				git_hash_update(&file->digest, buffer, read_bytes);
+		}
+
+		p_close(source);
+
+		if (read_bytes < 0) {
+			git_error_set(GIT_ERROR_OS, "failed to read file '%s'", file->path_original);
+			return -1;
+		} else if (error < 0) {
+			git_error_set(GIT_ERROR_OS, "failed to write file '%s'", file->path_lock);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+void git_filebuf_cleanup(git_filebuf *file)
+{
+	if (file->fd_is_open && file->fd >= 0)
+		p_close(file->fd);
+
+	if (file->created_lock && !file->did_rename && file->path_lock && git_path_exists(file->path_lock))
+		p_unlink(file->path_lock);
+
+	if (file->compute_digest) {
+		git_hash_ctx_cleanup(&file->digest);
+		file->compute_digest = 0;
+	}
+
+	if (file->buffer)
+		git__free(file->buffer);
+
+	/* use the presence of z_buf to decide if we need to deflateEnd */
+	if (file->z_buf) {
+		git__free(file->z_buf);
+		deflateEnd(&file->zs);
+	}
+
+	if (file->path_original)
+		git__free(file->path_original);
+	if (file->path_lock)
+		git__free(file->path_lock);
+
+	memset(file, 0x0, sizeof(git_filebuf));
+	file->fd = -1;
+}
+
+GIT_INLINE(int) flush_buffer(git_filebuf *file)
+{
+	int result = file->write(file, file->buffer, file->buf_pos);
+	file->buf_pos = 0;
+	return result;
+}
+
+int git_filebuf_flush(git_filebuf *file)
+{
+	return flush_buffer(file);
+}
+
+static int write_normal(git_filebuf *file, void *source, size_t len)
+{
+	if (len > 0) {
+		if (p_write(file->fd, (void *)source, len) < 0) {
+			file->last_error = BUFERR_WRITE;
+			return -1;
+		}
+
+		if (file->compute_digest)
+			git_hash_update(&file->digest, source, len);
+	}
+
+	return 0;
+}
+
+static int write_deflate(git_filebuf *file, void *source, size_t len)
+{
+	z_stream *zs = &file->zs;
+
+	if (len > 0 || file->flush_mode == Z_FINISH) {
+		zs->next_in = source;
+		zs->avail_in = (uInt)len;
+
+		do {
+			size_t have;
+
+			zs->next_out = file->z_buf;
+			zs->avail_out = (uInt)file->buf_size;
+
+			if (deflate(zs, file->flush_mode) == Z_STREAM_ERROR) {
+				file->last_error = BUFERR_ZLIB;
+				return -1;
+			}
+
+			have = file->buf_size - (size_t)zs->avail_out;
+
+			if (p_write(file->fd, file->z_buf, have) < 0) {
+				file->last_error = BUFERR_WRITE;
+				return -1;
+			}
+
+		} while (zs->avail_out == 0);
+
+		assert(zs->avail_in == 0);
+
+		if (file->compute_digest)
+			git_hash_update(&file->digest, source, len);
+	}
+
+	return 0;
+}
+
+#define MAX_SYMLINK_DEPTH 5
+
+static int resolve_symlink(git_buf *out, const char *path)
+{
+	int i, error, root;
+	ssize_t ret;
+	struct stat st;
+	git_buf curpath = GIT_BUF_INIT, target = GIT_BUF_INIT;
+
+	if ((error = git_buf_grow(&target, GIT_PATH_MAX + 1)) < 0 ||
+	    (error = git_buf_puts(&curpath, path)) < 0)
+		return error;
+
+	for (i = 0; i < MAX_SYMLINK_DEPTH; i++) {
+		error = p_lstat(curpath.ptr, &st);
+		if (error < 0 && errno == ENOENT) {
+			error = git_buf_puts(out, curpath.ptr);
+			goto cleanup;
+		}
+
+		if (error < 0) {
+			git_error_set(GIT_ERROR_OS, "failed to stat '%s'", curpath.ptr);
+			error = -1;
+			goto cleanup;
+		}
+
+		if (!S_ISLNK(st.st_mode)) {
+			error = git_buf_puts(out, curpath.ptr);
+			goto cleanup;
+		}
+
+		ret = p_readlink(curpath.ptr, target.ptr, GIT_PATH_MAX);
+		if (ret < 0) {
+			git_error_set(GIT_ERROR_OS, "failed to read symlink '%s'", curpath.ptr);
+			error = -1;
+			goto cleanup;
+		}
+
+		if (ret == GIT_PATH_MAX) {
+			git_error_set(GIT_ERROR_INVALID, "symlink target too long");
+			error = -1;
+			goto cleanup;
+		}
+
+		/* readlink(2) won't NUL-terminate for us */
+		target.ptr[ret] = '\0';
+		target.size = ret;
+
+		root = git_path_root(target.ptr);
+		if (root >= 0) {
+			if ((error = git_buf_sets(&curpath, target.ptr)) < 0)
+				goto cleanup;
+		} else {
+			git_buf dir = GIT_BUF_INIT;
+
+			if ((error = git_path_dirname_r(&dir, curpath.ptr)) < 0)
+				goto cleanup;
+
+			git_buf_swap(&curpath, &dir);
+			git_buf_dispose(&dir);
+
+			if ((error = git_path_apply_relative(&curpath, target.ptr)) < 0)
+				goto cleanup;
+		}
+	}
+
+	git_error_set(GIT_ERROR_INVALID, "maximum symlink depth reached");
+	error = -1;
+
+cleanup:
+	git_buf_dispose(&curpath);
+	git_buf_dispose(&target);
+	return error;
+}
+
+int git_filebuf_open(git_filebuf *file, const char *path, int flags, mode_t mode)
+{
+	return git_filebuf_open_withsize(file, path, flags, mode, WRITE_BUFFER_SIZE);
+}
+
+int git_filebuf_open_withsize(git_filebuf *file, const char *path, int flags, mode_t mode, size_t size)
+{
+	int compression, error = -1;
+	size_t path_len, alloc_len;
+
+	/* opening an already open buffer is a programming error;
+	 * assert that this never happens instead of returning
+	 * an error code */
+	assert(file && path && file->buffer == NULL);
+
+	memset(file, 0x0, sizeof(git_filebuf));
+
+	if (flags & GIT_FILEBUF_DO_NOT_BUFFER)
+		file->do_not_buffer = true;
+
+	if (flags & GIT_FILEBUF_FSYNC)
+		file->do_fsync = true;
+
+	file->buf_size = size;
+	file->buf_pos = 0;
+	file->fd = -1;
+	file->last_error = BUFERR_OK;
+
+	/* Allocate the main cache buffer */
+	if (!file->do_not_buffer) {
+		file->buffer = git__malloc(file->buf_size);
+		GIT_ERROR_CHECK_ALLOC(file->buffer);
+	}
+
+	/* If we are hashing on-write, allocate a new hash context */
+	if (flags & GIT_FILEBUF_HASH_CONTENTS) {
+		file->compute_digest = 1;
+
+		if (git_hash_ctx_init(&file->digest) < 0)
+			goto cleanup;
+	}
+
+	compression = flags >> GIT_FILEBUF_DEFLATE_SHIFT;
+
+	/* If we are deflating on-write, */
+	if (compression != 0) {
+		/* Initialize the ZLib stream */
+		if (deflateInit(&file->zs, compression) != Z_OK) {
+			git_error_set(GIT_ERROR_ZLIB, "failed to initialize zlib");
+			goto cleanup;
+		}
+
+		/* Allocate the Zlib cache buffer */
+		file->z_buf = git__malloc(file->buf_size);
+		GIT_ERROR_CHECK_ALLOC(file->z_buf);
+
+		/* Never flush */
+		file->flush_mode = Z_NO_FLUSH;
+		file->write = &write_deflate;
+	} else {
+		file->write = &write_normal;
+	}
+
+	/* If we are writing to a temp file */
+	if (flags & GIT_FILEBUF_TEMPORARY) {
+		git_buf tmp_path = GIT_BUF_INIT;
+
+		/* Open the file as temporary for locking */
+		file->fd = git_futils_mktmp(&tmp_path, path, mode);
+
+		if (file->fd < 0) {
+			git_buf_dispose(&tmp_path);
+			goto cleanup;
+		}
+		file->fd_is_open = true;
+		file->created_lock = true;
+
+		/* No original path */
+		file->path_original = NULL;
+		file->path_lock = git_buf_detach(&tmp_path);
+		GIT_ERROR_CHECK_ALLOC(file->path_lock);
+	} else {
+		git_buf resolved_path = GIT_BUF_INIT;
+
+		if ((error = resolve_symlink(&resolved_path, path)) < 0)
+			goto cleanup;
+
+		/* Save the original path of the file */
+		path_len = resolved_path.size;
+		file->path_original = git_buf_detach(&resolved_path);
+
+		/* create the locking path by appending ".lock" to the original */
+		GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, path_len, GIT_FILELOCK_EXTLENGTH);
+		file->path_lock = git__malloc(alloc_len);
+		GIT_ERROR_CHECK_ALLOC(file->path_lock);
+
+		memcpy(file->path_lock, file->path_original, path_len);
+		memcpy(file->path_lock + path_len, GIT_FILELOCK_EXTENSION, GIT_FILELOCK_EXTLENGTH);
+
+		if (git_path_isdir(file->path_original)) {
+			git_error_set(GIT_ERROR_FILESYSTEM, "path '%s' is a directory", file->path_original);
+			error = GIT_EDIRECTORY;
+			goto cleanup;
+		}
+
+		/* open the file for locking */
+		if ((error = lock_file(file, flags, mode)) < 0)
+			goto cleanup;
+
+		file->created_lock = true;
+	}
+
+	return 0;
+
+cleanup:
+	git_filebuf_cleanup(file);
+	return error;
+}
+
+int git_filebuf_hash(git_oid *oid, git_filebuf *file)
+{
+	assert(oid && file && file->compute_digest);
+
+	flush_buffer(file);
+
+	if (verify_last_error(file) < 0)
+		return -1;
+
+	git_hash_final(oid, &file->digest);
+	git_hash_ctx_cleanup(&file->digest);
+	file->compute_digest = 0;
+
+	return 0;
+}
+
+int git_filebuf_commit_at(git_filebuf *file, const char *path)
+{
+	git__free(file->path_original);
+	file->path_original = git__strdup(path);
+	GIT_ERROR_CHECK_ALLOC(file->path_original);
+
+	return git_filebuf_commit(file);
+}
+
+int git_filebuf_commit(git_filebuf *file)
+{
+	/* temporary files cannot be committed */
+	assert(file && file->path_original);
+
+	file->flush_mode = Z_FINISH;
+	flush_buffer(file);
+
+	if (verify_last_error(file) < 0)
+		goto on_error;
+
+	file->fd_is_open = false;
+
+	if (file->do_fsync && p_fsync(file->fd) < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to fsync '%s'", file->path_lock);
+		goto on_error;
+	}
+
+	if (p_close(file->fd) < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to close file at '%s'", file->path_lock);
+		goto on_error;
+	}
+
+	file->fd = -1;
+
+	if (p_rename(file->path_lock, file->path_original) < 0) {
+		git_error_set(GIT_ERROR_OS, "failed to rename lockfile to '%s'", file->path_original);
+		goto on_error;
+	}
+
+	if (file->do_fsync && git_futils_fsync_parent(file->path_original) < 0)
+		goto on_error;
+
+	file->did_rename = true;
+
+	git_filebuf_cleanup(file);
+	return 0;
+
+on_error:
+	git_filebuf_cleanup(file);
+	return -1;
+}
+
+GIT_INLINE(void) add_to_cache(git_filebuf *file, const void *buf, size_t len)
+{
+	memcpy(file->buffer + file->buf_pos, buf, len);
+	file->buf_pos += len;
+}
+
+int git_filebuf_write(git_filebuf *file, const void *buff, size_t len)
+{
+	const unsigned char *buf = buff;
+
+	ENSURE_BUF_OK(file);
+
+	if (file->do_not_buffer)
+		return file->write(file, (void *)buff, len);
+
+	for (;;) {
+		size_t space_left = file->buf_size - file->buf_pos;
+
+		/* cache if it's small */
+		if (space_left > len) {
+			add_to_cache(file, buf, len);
+			return 0;
+		}
+
+		add_to_cache(file, buf, space_left);
+		if (flush_buffer(file) < 0)
+			return -1;
+
+		len -= space_left;
+		buf += space_left;
+	}
+}
+
+int git_filebuf_reserve(git_filebuf *file, void **buffer, size_t len)
+{
+	size_t space_left = file->buf_size - file->buf_pos;
+
+	*buffer = NULL;
+
+	ENSURE_BUF_OK(file);
+
+	if (len > file->buf_size) {
+		file->last_error = BUFERR_MEM;
+		return -1;
+	}
+
+	if (space_left <= len) {
+		if (flush_buffer(file) < 0)
+			return -1;
+	}
+
+	*buffer = (file->buffer + file->buf_pos);
+	file->buf_pos += len;
+
+	return 0;
+}
+
+int git_filebuf_printf(git_filebuf *file, const char *format, ...)
+{
+	va_list arglist;
+	size_t space_left, len, alloclen;
+	int written, res;
+	char *tmp_buffer;
+
+	ENSURE_BUF_OK(file);
+
+	space_left = file->buf_size - file->buf_pos;
+
+	do {
+		va_start(arglist, format);
+		written = p_vsnprintf((char *)file->buffer + file->buf_pos, space_left, format, arglist);
+		va_end(arglist);
+
+		if (written < 0) {
+			file->last_error = BUFERR_MEM;
+			return -1;
+		}
+
+		len = written;
+		if (len + 1 <= space_left) {
+			file->buf_pos += len;
+			return 0;
+		}
+
+		if (flush_buffer(file) < 0)
+			return -1;
+
+		space_left = file->buf_size - file->buf_pos;
+
+	} while (len + 1 <= space_left);
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloclen, len, 1) ||
+		!(tmp_buffer = git__malloc(alloclen))) {
+		file->last_error = BUFERR_MEM;
+		return -1;
+	}
+
+	va_start(arglist, format);
+	written = p_vsnprintf(tmp_buffer, len + 1, format, arglist);
+	va_end(arglist);
+
+	if (written < 0) {
+		git__free(tmp_buffer);
+		file->last_error = BUFERR_MEM;
+		return -1;
+	}
+
+	res = git_filebuf_write(file, tmp_buffer, len);
+	git__free(tmp_buffer);
+
+	return res;
+}
+
+int git_filebuf_stats(time_t *mtime, size_t *size, git_filebuf *file)
+{
+	int res;
+	struct stat st;
+
+	if (file->fd_is_open)
+		res = p_fstat(file->fd, &st);
+	else
+		res = p_stat(file->path_original, &st);
+
+	if (res < 0) {
+		git_error_set(GIT_ERROR_OS, "could not get stat info for '%s'",
+			file->path_original);
+		return res;
+	}
+
+	if (mtime)
+		*mtime = st.st_mtime;
+	if (size)
+		*size = (size_t)st.st_size;
+
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/filebuf.h

@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_filebuf_h__
+#define INCLUDE_filebuf_h__
+
+#include "common.h"
+
+#include "futils.h"
+#include "hash.h"
+#include <zlib.h>
+
+#ifdef GIT_THREADS
+#	define GIT_FILEBUF_THREADS
+#endif
+
+#define GIT_FILEBUF_HASH_CONTENTS		(1 << 0)
+#define GIT_FILEBUF_APPEND				(1 << 2)
+#define GIT_FILEBUF_CREATE_LEADING_DIRS	(1 << 3)
+#define GIT_FILEBUF_TEMPORARY			(1 << 4)
+#define GIT_FILEBUF_DO_NOT_BUFFER		(1 << 5)
+#define GIT_FILEBUF_FSYNC				(1 << 6)
+#define GIT_FILEBUF_DEFLATE_SHIFT		(7)
+
+#define GIT_FILELOCK_EXTENSION ".lock\0"
+#define GIT_FILELOCK_EXTLENGTH 6
+
+typedef struct git_filebuf git_filebuf;
+struct git_filebuf {
+	char *path_original;
+	char *path_lock;
+
+	int (*write)(git_filebuf *file, void *source, size_t len);
+
+	bool compute_digest;
+	git_hash_ctx digest;
+
+	unsigned char *buffer;
+	unsigned char *z_buf;
+
+	z_stream zs;
+	int flush_mode;
+
+	size_t buf_size, buf_pos;
+	git_file fd;
+	bool fd_is_open;
+	bool created_lock;
+	bool did_rename;
+	bool do_not_buffer;
+	bool do_fsync;
+	int last_error;
+};
+
+#define GIT_FILEBUF_INIT {0}
+
+/*
+ * The git_filebuf object lifecycle is:
+ * - Allocate git_filebuf, preferably using GIT_FILEBUF_INIT.
+ *
+ * - Call git_filebuf_open() to initialize the filebuf for use.
+ *
+ * - Make as many calls to git_filebuf_write(), git_filebuf_printf(),
+ *   git_filebuf_reserve() as you like. The error codes for these
+ *   functions don't need to be checked. They are stored internally
+ *   by the file buffer.
+ *
+ * - While you are writing, you may call git_filebuf_hash() to get
+ *   the hash of all you have written so far. This function will
+ *   fail if any of the previous writes to the buffer failed.
+ *
+ * - To close the git_filebuf, you may call git_filebuf_commit() or
+ *   git_filebuf_commit_at() to save the file, or
+ *   git_filebuf_cleanup() to abandon the file.  All of these will
+ *   free the git_filebuf object. Likewise, all of these will fail
+ *   if any of the previous writes to the buffer failed, and set
+ *   an error code accordingly.
+ */
+int git_filebuf_write(git_filebuf *lock, const void *buff, size_t len);
+int git_filebuf_reserve(git_filebuf *file, void **buff, size_t len);
+int git_filebuf_printf(git_filebuf *file, const char *format, ...) GIT_FORMAT_PRINTF(2, 3);
+
+int git_filebuf_open(git_filebuf *lock, const char *path, int flags, mode_t mode);
+int git_filebuf_open_withsize(git_filebuf *file, const char *path, int flags, mode_t mode, size_t size);
+int git_filebuf_commit(git_filebuf *lock);
+int git_filebuf_commit_at(git_filebuf *lock, const char *path);
+void git_filebuf_cleanup(git_filebuf *lock);
+int git_filebuf_hash(git_oid *oid, git_filebuf *file);
+int git_filebuf_flush(git_filebuf *file);
+int git_filebuf_stats(time_t *mtime, size_t *size, git_filebuf *file);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/filter.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_filter_h__
+#define INCLUDE_filter_h__
+
+#include "common.h"
+
+#include "attr_file.h"
+#include "git2/filter.h"
+
+/* Amount of file to examine for NUL byte when checking binary-ness */
+#define GIT_FILTER_BYTES_TO_CHECK_NUL 8000
+
+typedef struct {
+	git_attr_session *attr_session;
+	git_buf *temp_buf;
+	uint32_t flags;
+} git_filter_options;
+
+#define GIT_FILTER_OPTIONS_INIT {0}
+
+extern int git_filter_global_init(void);
+
+extern void git_filter_free(git_filter *filter);
+
+extern int git_filter_list__load_ext(
+	git_filter_list **filters,
+	git_repository *repo,
+	git_blob *blob, /* can be NULL */
+	const char *path,
+	git_filter_mode_t mode,
+	git_filter_options *filter_opts);
+
+/*
+ * Available filters
+ */
+
+extern git_filter *git_crlf_filter_new(void);
+extern git_filter *git_ident_filter_new(void);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/futils.h

@@ -0,0 +1,390 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_futils_h__
+#define INCLUDE_futils_h__
+
+#include "common.h"
+
+#include "map.h"
+#include "posix.h"
+#include "path.h"
+#include "pool.h"
+#include "strmap.h"
+#include "oid.h"
+
+/**
+ * Filebuffer methods
+ *
+ * Read whole files into an in-memory buffer for processing
+ */
+extern int git_futils_readbuffer(git_buf *obj, const char *path);
+extern int git_futils_readbuffer_updated(
+	git_buf *obj, const char *path, git_oid *checksum, int *updated);
+extern int git_futils_readbuffer_fd(git_buf *obj, git_file fd, size_t len);
+
+/* Additional constants for `git_futils_writebuffer`'s `open_flags`.  We
+ * support these internally and they will be removed before the `open` call.
+ */
+#ifndef O_FSYNC
+# define O_FSYNC (1 << 31)
+#endif
+
+extern int git_futils_writebuffer(
+	const git_buf *buf, const char *path, int open_flags, mode_t mode);
+
+/**
+ * File utils
+ *
+ * These are custom filesystem-related helper methods. They are
+ * rather high level, and wrap the underlying POSIX methods
+ *
+ * All these methods return 0 on success,
+ * or an error code on failure and an error message is set.
+ */
+
+/**
+ * Create and open a file, while also
+ * creating all the folders in its path
+ */
+extern int git_futils_creat_withpath(const char *path, const mode_t dirmode, const mode_t mode);
+
+/**
+ * Create and open a process-locked file
+ */
+extern int git_futils_creat_locked(const char *path, const mode_t mode);
+
+/**
+ * Create and open a process-locked file, while
+ * also creating all the folders in its path
+ */
+extern int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode);
+
+/**
+ * Create a path recursively.
+ */
+extern int git_futils_mkdir_r(const char *path, const mode_t mode);
+
+/**
+ * Flags to pass to `git_futils_mkdir`.
+ *
+ * * GIT_MKDIR_EXCL is "exclusive" - i.e. generate an error if dir exists.
+ * * GIT_MKDIR_PATH says to make all components in the path.
+ * * GIT_MKDIR_CHMOD says to chmod the final directory entry after creation
+ * * GIT_MKDIR_CHMOD_PATH says to chmod each directory component in the path
+ * * GIT_MKDIR_SKIP_LAST says to leave off the last element of the path
+ * * GIT_MKDIR_SKIP_LAST2 says to leave off the last 2 elements of the path
+ * * GIT_MKDIR_VERIFY_DIR says confirm final item is a dir, not just EEXIST
+ * * GIT_MKDIR_REMOVE_FILES says to remove files and recreate dirs
+ * * GIT_MKDIR_REMOVE_SYMLINKS says to remove symlinks and recreate dirs
+ *
+ * Note that the chmod options will be executed even if the directory already
+ * exists, unless GIT_MKDIR_EXCL is given.
+ */
+typedef enum {
+	GIT_MKDIR_EXCL = 1,
+	GIT_MKDIR_PATH = 2,
+	GIT_MKDIR_CHMOD = 4,
+	GIT_MKDIR_CHMOD_PATH = 8,
+	GIT_MKDIR_SKIP_LAST = 16,
+	GIT_MKDIR_SKIP_LAST2 = 32,
+	GIT_MKDIR_VERIFY_DIR = 64,
+	GIT_MKDIR_REMOVE_FILES = 128,
+	GIT_MKDIR_REMOVE_SYMLINKS = 256,
+} git_futils_mkdir_flags;
+
+struct git_futils_mkdir_perfdata
+{
+	size_t stat_calls;
+	size_t mkdir_calls;
+	size_t chmod_calls;
+};
+
+struct git_futils_mkdir_options
+{
+	git_strmap *dir_map;
+	git_pool *pool;
+	struct git_futils_mkdir_perfdata perfdata;
+};
+
+/**
+ * Create a directory or entire path.
+ *
+ * This makes a directory (and the entire path leading up to it if requested),
+ * and optionally chmods the directory immediately after (or each part of the
+ * path if requested).
+ *
+ * @param path The path to create, relative to base.
+ * @param base Root for relative path.  These directories will never be made.
+ * @param mode The mode to use for created directories.
+ * @param flags Combination of the mkdir flags above.
+ * @param opts Extended options, or null.
+ * @return 0 on success, else error code
+ */
+extern int git_futils_mkdir_relative(const char *path, const char *base, mode_t mode, uint32_t flags, struct git_futils_mkdir_options *opts);
+
+/**
+ * Create a directory or entire path.  Similar to `git_futils_mkdir_relative`
+ * without performance data.
+ */
+extern int git_futils_mkdir(const char *path, mode_t mode, uint32_t flags);
+
+/**
+ * Create all the folders required to contain
+ * the full path of a file
+ */
+extern int git_futils_mkpath2file(const char *path, const mode_t mode);
+
+/**
+ * Flags to pass to `git_futils_rmdir_r`.
+ *
+ * * GIT_RMDIR_EMPTY_HIERARCHY - the default; remove hierarchy of empty
+ *       dirs and generate error if any files are found.
+ * * GIT_RMDIR_REMOVE_FILES    - attempt to remove files in the hierarchy.
+ * * GIT_RMDIR_SKIP_NONEMPTY   - skip non-empty directories with no error.
+ * * GIT_RMDIR_EMPTY_PARENTS   - remove containing directories up to base
+ *       if removing this item leaves them empty
+ * * GIT_RMDIR_REMOVE_BLOCKERS - remove blocking file that causes ENOTDIR
+ * * GIT_RMDIR_SKIP_ROOT       - don't remove root directory itself
+ */
+typedef enum {
+	GIT_RMDIR_EMPTY_HIERARCHY = 0,
+	GIT_RMDIR_REMOVE_FILES    = (1 << 0),
+	GIT_RMDIR_SKIP_NONEMPTY   = (1 << 1),
+	GIT_RMDIR_EMPTY_PARENTS   = (1 << 2),
+	GIT_RMDIR_REMOVE_BLOCKERS = (1 << 3),
+	GIT_RMDIR_SKIP_ROOT       = (1 << 4),
+} git_futils_rmdir_flags;
+
+/**
+ * Remove path and any files and directories beneath it.
+ *
+ * @param path Path to the top level directory to process.
+ * @param base Root for relative path.
+ * @param flags Combination of git_futils_rmdir_flags values
+ * @return 0 on success; -1 on error.
+ */
+extern int git_futils_rmdir_r(const char *path, const char *base, uint32_t flags);
+
+/**
+ * Create and open a temporary file with a `_git2_` suffix.
+ * Writes the filename into path_out.
+ * @return On success, an open file descriptor, else an error code < 0.
+ */
+extern int git_futils_mktmp(git_buf *path_out, const char *filename, mode_t mode);
+
+/**
+ * Move a file on the filesystem, create the
+ * destination path if it doesn't exist
+ */
+extern int git_futils_mv_withpath(const char *from, const char *to, const mode_t dirmode);
+
+/**
+ * Copy a file
+ *
+ * The filemode will be used for the newly created file.
+ */
+extern int git_futils_cp(
+	const char *from,
+	const char *to,
+	mode_t filemode);
+
+/**
+ * Set the files atime and mtime to the given time, or the current time
+ * if `ts` is NULL.
+ */
+extern int git_futils_touch(const char *path, time_t *when);
+
+/**
+ * Flags that can be passed to `git_futils_cp_r`.
+ *
+ * - GIT_CPDIR_CREATE_EMPTY_DIRS: create directories even if there are no
+ *   files under them (otherwise directories will only be created lazily
+ *   when a file inside them is copied).
+ * - GIT_CPDIR_COPY_SYMLINKS: copy symlinks, otherwise they are ignored.
+ * - GIT_CPDIR_COPY_DOTFILES: copy files with leading '.', otherwise ignored.
+ * - GIT_CPDIR_OVERWRITE: overwrite pre-existing files with source content,
+ *   otherwise they are silently skipped.
+ * - GIT_CPDIR_CHMOD_DIRS: explicitly chmod directories to `dirmode`
+ * - GIT_CPDIR_SIMPLE_TO_MODE: default tries to replicate the mode of the
+ *   source file to the target; with this flag, always use 0666 (or 0777 if
+ *   source has exec bits set) for target.
+ * - GIT_CPDIR_LINK_FILES will try to use hardlinks for the files
+ */
+typedef enum {
+	GIT_CPDIR_CREATE_EMPTY_DIRS = (1u << 0),
+	GIT_CPDIR_COPY_SYMLINKS     = (1u << 1),
+	GIT_CPDIR_COPY_DOTFILES     = (1u << 2),
+	GIT_CPDIR_OVERWRITE         = (1u << 3),
+	GIT_CPDIR_CHMOD_DIRS        = (1u << 4),
+	GIT_CPDIR_SIMPLE_TO_MODE    = (1u << 5),
+	GIT_CPDIR_LINK_FILES        = (1u << 6),
+} git_futils_cpdir_flags;
+
+/**
+ * Copy a directory tree.
+ *
+ * This copies directories and files from one root to another.  You can
+ * pass a combinationof GIT_CPDIR flags as defined above.
+ *
+ * If you pass the CHMOD flag, then the dirmode will be applied to all
+ * directories that are created during the copy, overiding the natural
+ * permissions.  If you do not pass the CHMOD flag, then the dirmode
+ * will actually be copied from the source files and the `dirmode` arg
+ * will be ignored.
+ */
+extern int git_futils_cp_r(
+	const char *from,
+	const char *to,
+	uint32_t flags,
+	mode_t dirmode);
+
+/**
+ * Open a file readonly and set error if needed.
+ */
+extern int git_futils_open_ro(const char *path);
+
+/**
+ * Truncate a file, creating it if it doesn't exist.
+ */
+extern int git_futils_truncate(const char *path, int mode);
+
+/**
+ * Get the filesize in bytes of a file
+ */
+extern int git_futils_filesize(uint64_t *out, git_file fd);
+
+#define GIT_PERMS_IS_EXEC(MODE)		(((MODE) & 0111) != 0)
+#define GIT_PERMS_CANONICAL(MODE)	(GIT_PERMS_IS_EXEC(MODE) ? 0755 : 0644)
+#define GIT_PERMS_FOR_WRITE(MODE)   (GIT_PERMS_IS_EXEC(MODE) ? 0777 : 0666)
+
+#define GIT_MODE_PERMS_MASK			0777
+#define GIT_MODE_TYPE_MASK			0170000
+#define GIT_MODE_TYPE(MODE)			((MODE) & GIT_MODE_TYPE_MASK)
+#define GIT_MODE_ISBLOB(MODE)		(GIT_MODE_TYPE(MODE) == GIT_MODE_TYPE(GIT_FILEMODE_BLOB))
+
+/**
+ * Convert a mode_t from the OS to a legal git mode_t value.
+ */
+extern mode_t git_futils_canonical_mode(mode_t raw_mode);
+
+
+/**
+ * Read-only map all or part of a file into memory.
+ * When possible this function should favor a virtual memory
+ * style mapping over some form of malloc()+read(), as the
+ * data access will be random and is not likely to touch the
+ * majority of the region requested.
+ *
+ * @param out buffer to populate with the mapping information.
+ * @param fd open descriptor to configure the mapping from.
+ * @param begin first byte to map, this should be page aligned.
+ * @param len number of bytes to map.
+ * @return
+ * - 0 on success;
+ * - -1 on error.
+ */
+extern int git_futils_mmap_ro(
+	git_map *out,
+	git_file fd,
+	off64_t begin,
+	size_t len);
+
+/**
+ * Read-only map an entire file.
+ *
+ * @param out buffer to populate with the mapping information.
+ * @param path path to file to be opened.
+ * @return
+ * - 0 on success;
+ * - GIT_ENOTFOUND if not found;
+ * - -1 on an unspecified OS related error.
+ */
+extern int git_futils_mmap_ro_file(
+	git_map *out,
+	const char *path);
+
+/**
+ * Release the memory associated with a previous memory mapping.
+ * @param map the mapping description previously configured.
+ */
+extern void git_futils_mmap_free(git_map *map);
+
+/**
+ * Create a "fake" symlink (text file containing the target path).
+ *
+ * @param new symlink file to be created
+ * @param old original symlink target
+ * @return 0 on success, -1 on error
+ */
+extern int git_futils_fake_symlink(const char *new, const char *old);
+
+/**
+ * A file stamp represents a snapshot of information about a file that can
+ * be used to test if the file changes.  This portable implementation is
+ * based on stat data about that file, but it is possible that OS specific
+ * versions could be implemented in the future.
+ */
+typedef struct {
+	struct timespec mtime;
+	uint64_t size;
+	unsigned int ino;
+} git_futils_filestamp;
+
+/**
+ * Compare stat information for file with reference info.
+ *
+ * This function updates the file stamp to current data for the given path
+ * and returns 0 if the file is up-to-date relative to the prior setting,
+ * 1 if the file has been changed, or GIT_ENOTFOUND if the file doesn't
+ * exist.  This will not call git_error_set, so you must set the error if you
+ * plan to return an error.
+ *
+ * @param stamp File stamp to be checked
+ * @param path Path to stat and check if changed
+ * @return 0 if up-to-date, 1 if out-of-date, GIT_ENOTFOUND if cannot stat
+ */
+extern int git_futils_filestamp_check(
+	git_futils_filestamp *stamp, const char *path);
+
+/**
+ * Set or reset file stamp data
+ *
+ * This writes the target file stamp.  If the source is NULL, this will set
+ * the target stamp to values that will definitely be out of date.  If the
+ * source is not NULL, this copies the source values to the target.
+ *
+ * @param tgt File stamp to write to
+ * @param src File stamp to copy from or NULL to clear the target
+ */
+extern void git_futils_filestamp_set(
+	git_futils_filestamp *tgt, const git_futils_filestamp *src);
+
+/**
+ * Set file stamp data from stat structure
+ */
+extern void git_futils_filestamp_set_from_stat(
+	git_futils_filestamp *stamp, struct stat *st);
+
+/**
+ * `fsync` the parent directory of the given path, if `fsync` is
+ * supported for directories on this platform.
+ *
+ * @param path Path of the directory to sync.
+ * @return 0 on success, -1 on error
+ */
+extern int git_futils_fsync_dir(const char *path);
+
+/**
+ * `fsync` the parent directory of the given path, if `fsync` is
+ * supported for directories on this platform.
+ *
+ * @param path Path of the file whose parent directory should be synced.
+ * @return 0 on success, -1 on error
+ */
+extern int git_futils_fsync_parent(const char *path);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/global.c

@@ -0,0 +1,361 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "global.h"
+
+#include "alloc.h"
+#include "hash.h"
+#include "sysdir.h"
+#include "filter.h"
+#include "merge_driver.h"
+#include "streams/registry.h"
+#include "streams/mbedtls.h"
+#include "streams/openssl.h"
+#include "thread-utils.h"
+#include "git2/global.h"
+#include "transports/ssh.h"
+
+#if defined(GIT_MSVC_CRTDBG)
+#include "win32/w32_stack.h"
+#include "win32/w32_crtdbg_stacktrace.h"
+#endif
+
+git_mutex git__mwindow_mutex;
+
+typedef int (*git_global_init_fn)(void);
+
+static git_global_init_fn git__init_callbacks[] = {
+	git_allocator_global_init,
+	git_hash_global_init,
+	git_sysdir_global_init,
+	git_filter_global_init,
+	git_merge_driver_global_init,
+	git_transport_ssh_global_init,
+	git_stream_registry_global_init,
+	git_openssl_stream_global_init,
+	git_mbedtls_stream_global_init,
+	git_mwindow_global_init
+};
+
+static git_global_shutdown_fn git__shutdown_callbacks[ARRAY_SIZE(git__init_callbacks)];
+
+static git_atomic git__n_shutdown_callbacks;
+static git_atomic git__n_inits;
+char *git__user_agent;
+char *git__ssl_ciphers;
+
+void git__on_shutdown(git_global_shutdown_fn callback)
+{
+	int count = git_atomic_inc(&git__n_shutdown_callbacks);
+	assert(count <= (int) ARRAY_SIZE(git__shutdown_callbacks) && count > 0);
+	git__shutdown_callbacks[count - 1] = callback;
+}
+
+static void git__global_state_cleanup(git_global_st *st)
+{
+	if (!st)
+		return;
+
+	git__free(st->error_t.message);
+	st->error_t.message = NULL;
+}
+
+static int init_common(void)
+{
+	size_t i;
+	int ret;
+
+	/* Initialize the CRT debug allocator first, before our first malloc */
+#if defined(GIT_MSVC_CRTDBG)
+	git_win32__crtdbg_stacktrace_init();
+	git_win32__stack_init();
+#endif
+
+	/* Initialize subsystems that have global state */
+	for (i = 0; i < ARRAY_SIZE(git__init_callbacks); i++)
+		if ((ret = git__init_callbacks[i]()) != 0)
+			break;
+
+	GIT_MEMORY_BARRIER;
+
+	return ret;
+}
+
+static void shutdown_common(void)
+{
+	int pos;
+
+	/* Shutdown subsystems that have registered */
+	for (pos = git_atomic_get(&git__n_shutdown_callbacks);
+		pos > 0;
+		pos = git_atomic_dec(&git__n_shutdown_callbacks)) {
+
+		git_global_shutdown_fn cb = git__swap(
+			git__shutdown_callbacks[pos - 1], NULL);
+
+		if (cb != NULL)
+			cb();
+	}
+
+	git__free(git__user_agent);
+	git__free(git__ssl_ciphers);
+}
+
+/**
+ * Handle the global state with TLS
+ *
+ * If libgit2 is built with GIT_THREADS enabled,
+ * the `git_libgit2_init()` function must be called
+ * before calling any other function of the library.
+ *
+ * This function allocates a TLS index (using pthreads
+ * or the native Win32 API) to store the global state
+ * on a per-thread basis.
+ *
+ * Any internal method that requires global state will
+ * then call `git__global_state()` which returns a pointer
+ * to the global state structure; this pointer is lazily
+ * allocated on each thread.
+ *
+ * Before shutting down the library, the
+ * `git_libgit2_shutdown` method must be called to free
+ * the previously reserved TLS index.
+ *
+ * If libgit2 is built without threading support, the
+ * `git__global_statestate()` call returns a pointer to a single,
+ * statically allocated global state. The `git_thread_`
+ * functions are not available in that case.
+ */
+
+/*
+ * `git_libgit2_init()` allows subsystems to perform global setup,
+ * which may take place in the global scope.  An explicit memory
+ * fence exists at the exit of `git_libgit2_init()`.  Without this,
+ * CPU cores are free to reorder cache invalidation of `_tls_init`
+ * before cache invalidation of the subsystems' newly written global
+ * state.
+ */
+#if defined(GIT_THREADS) && defined(GIT_WIN32)
+
+static DWORD _fls_index;
+static volatile LONG _mutex = 0;
+
+static void WINAPI fls_free(void *st)
+{
+	git__global_state_cleanup(st);
+	git__free(st);
+}
+
+static int synchronized_threads_init(void)
+{
+	int error;
+
+	if ((_fls_index = FlsAlloc(fls_free)) == FLS_OUT_OF_INDEXES)
+		return -1;
+
+	git_threads_init();
+
+	if (git_mutex_init(&git__mwindow_mutex))
+		return -1;
+
+	error = init_common();
+
+	return error;
+}
+
+int git_libgit2_init(void)
+{
+	int ret;
+
+	/* Enter the lock */
+	while (InterlockedCompareExchange(&_mutex, 1, 0)) { Sleep(0); }
+
+	/* Only do work on a 0 -> 1 transition of the refcount */
+	if ((ret = git_atomic_inc(&git__n_inits)) == 1) {
+		if (synchronized_threads_init() < 0)
+			ret = -1;
+	}
+
+	/* Exit the lock */
+	InterlockedExchange(&_mutex, 0);
+
+	return ret;
+}
+
+int git_libgit2_shutdown(void)
+{
+	int ret;
+
+	/* Enter the lock */
+	while (InterlockedCompareExchange(&_mutex, 1, 0)) { Sleep(0); }
+
+	/* Only do work on a 1 -> 0 transition of the refcount */
+	if ((ret = git_atomic_dec(&git__n_inits)) == 0) {
+		shutdown_common();
+
+		FlsFree(_fls_index);
+		git_mutex_free(&git__mwindow_mutex);
+
+#if defined(GIT_MSVC_CRTDBG)
+		git_win32__crtdbg_stacktrace_cleanup();
+		git_win32__stack_cleanup();
+#endif
+	}
+
+	/* Exit the lock */
+	InterlockedExchange(&_mutex, 0);
+
+	return ret;
+}
+
+git_global_st *git__global_state(void)
+{
+	git_global_st *ptr;
+
+	assert(git_atomic_get(&git__n_inits) > 0);
+
+	if ((ptr = FlsGetValue(_fls_index)) != NULL)
+		return ptr;
+
+	ptr = git__calloc(1, sizeof(git_global_st));
+	if (!ptr)
+		return NULL;
+
+	git_buf_init(&ptr->error_buf, 0);
+
+	FlsSetValue(_fls_index, ptr);
+	return ptr;
+}
+
+#elif defined(GIT_THREADS) && defined(_POSIX_THREADS)
+
+static pthread_key_t _tls_key;
+static pthread_mutex_t _init_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_once_t _once_init = PTHREAD_ONCE_INIT;
+int init_error = 0;
+
+static void cb__free_status(void *st)
+{
+	git__global_state_cleanup(st);
+	git__free(st);
+}
+
+static void init_once(void)
+{
+	if ((init_error = git_mutex_init(&git__mwindow_mutex)) != 0)
+		return;
+
+	pthread_key_create(&_tls_key, &cb__free_status);
+
+	init_error = init_common();
+}
+
+int git_libgit2_init(void)
+{
+	int ret, err;
+
+	if ((err = pthread_mutex_lock(&_init_mutex)) != 0)
+		return err;
+
+	ret = git_atomic_inc(&git__n_inits);
+	err = pthread_once(&_once_init, init_once);
+	err |= pthread_mutex_unlock(&_init_mutex);
+
+	if (err || init_error)
+		return err | init_error;
+
+	return ret;
+}
+
+int git_libgit2_shutdown(void)
+{
+	void *ptr = NULL;
+	pthread_once_t new_once = PTHREAD_ONCE_INIT;
+	int error, ret;
+
+	if ((error = pthread_mutex_lock(&_init_mutex)) != 0)
+		return error;
+
+	if ((ret = git_atomic_dec(&git__n_inits)) != 0)
+		goto out;
+
+	/* Shut down any subsystems that have global state */
+	shutdown_common();
+
+	ptr = pthread_getspecific(_tls_key);
+	pthread_setspecific(_tls_key, NULL);
+
+	git__global_state_cleanup(ptr);
+	git__free(ptr);
+
+	pthread_key_delete(_tls_key);
+	git_mutex_free(&git__mwindow_mutex);
+	_once_init = new_once;
+
+out:
+	if ((error = pthread_mutex_unlock(&_init_mutex)) != 0)
+		return error;
+
+	return ret;
+}
+
+git_global_st *git__global_state(void)
+{
+	git_global_st *ptr;
+
+	assert(git_atomic_get(&git__n_inits) > 0);
+
+	if ((ptr = pthread_getspecific(_tls_key)) != NULL)
+		return ptr;
+
+	ptr = git__calloc(1, sizeof(git_global_st));
+	if (!ptr)
+		return NULL;
+
+	git_buf_init(&ptr->error_buf, 0);
+	pthread_setspecific(_tls_key, ptr);
+	return ptr;
+}
+
+#else
+
+static git_global_st __state;
+
+int git_libgit2_init(void)
+{
+	int ret;
+
+	/* Only init subsystems the first time */
+	if ((ret = git_atomic_inc(&git__n_inits)) != 1)
+		return ret;
+
+	if ((ret = init_common()) < 0)
+		return ret;
+
+	return 1;
+}
+
+int git_libgit2_shutdown(void)
+{
+	int ret;
+
+	/* Shut down any subsystems that have global state */
+	if ((ret = git_atomic_dec(&git__n_inits)) == 0) {
+		shutdown_common();
+		git__global_state_cleanup(&__state);
+		memset(&__state, 0, sizeof(__state));
+	}
+
+	return ret;
+}
+
+git_global_st *git__global_state(void)
+{
+	return &__state;
+}
+
+#endif /* GIT_THREADS */

node_modules/nodegit/vendor/libgit2/src/global.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_global_h__
+#define INCLUDE_global_h__
+
+#include "common.h"
+
+#include "mwindow.h"
+#include "hash.h"
+
+typedef struct {
+	git_error *last_error;
+	git_error error_t;
+	git_buf error_buf;
+	char oid_fmt[GIT_OID_HEXSZ+1];
+
+	/* On Windows, this is the current child thread that was started by
+	 * `git_thread_create`.  This is used to set the thread's exit code
+	 * when terminated by `git_thread_exit`.  It is unused on POSIX.
+	 */
+	git_thread *current_thread;
+} git_global_st;
+
+git_global_st *git__global_state(void);
+
+extern git_mutex git__mwindow_mutex;
+
+#define GIT_GLOBAL (git__global_state())
+
+typedef void (*git_global_shutdown_fn)(void);
+
+extern void git__on_shutdown(git_global_shutdown_fn callback);
+
+extern const char *git_libgit2__user_agent(void);
+extern const char *git_libgit2__ssl_ciphers(void);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/graph.c

@@ -0,0 +1,194 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "revwalk.h"
+#include "merge.h"
+#include "git2/graph.h"
+
+static int interesting(git_pqueue *list, git_commit_list *roots)
+{
+	unsigned int i;
+
+	for (i = 0; i < git_pqueue_size(list); i++) {
+		git_commit_list_node *commit = git_pqueue_get(list, i);
+		if ((commit->flags & STALE) == 0)
+			return 1;
+	}
+
+	while(roots) {
+		if ((roots->item->flags & STALE) == 0)
+			return 1;
+		roots = roots->next;
+	}
+
+	return 0;
+}
+
+static int mark_parents(git_revwalk *walk, git_commit_list_node *one,
+	git_commit_list_node *two)
+{
+	unsigned int i;
+	git_commit_list *roots = NULL;
+	git_pqueue list;
+
+	/* if the commit is repeated, we have a our merge base already */
+	if (one == two) {
+		one->flags |= PARENT1 | PARENT2 | RESULT;
+		return 0;
+	}
+
+	if (git_pqueue_init(&list, 0, 2, git_commit_list_time_cmp) < 0)
+		return -1;
+
+	if (git_commit_list_parse(walk, one) < 0)
+		goto on_error;
+	one->flags |= PARENT1;
+	if (git_pqueue_insert(&list, one) < 0)
+		goto on_error;
+
+	if (git_commit_list_parse(walk, two) < 0)
+		goto on_error;
+	two->flags |= PARENT2;
+	if (git_pqueue_insert(&list, two) < 0)
+		goto on_error;
+
+	/* as long as there are non-STALE commits */
+	while (interesting(&list, roots)) {
+		git_commit_list_node *commit = git_pqueue_pop(&list);
+		unsigned int flags;
+
+		if (commit == NULL)
+			break;
+
+		flags = commit->flags & (PARENT1 | PARENT2 | STALE);
+		if (flags == (PARENT1 | PARENT2)) {
+			if (!(commit->flags & RESULT))
+				commit->flags |= RESULT;
+			/* we mark the parents of a merge stale */
+			flags |= STALE;
+		}
+
+		for (i = 0; i < commit->out_degree; i++) {
+			git_commit_list_node *p = commit->parents[i];
+			if ((p->flags & flags) == flags)
+				continue;
+
+			if (git_commit_list_parse(walk, p) < 0)
+				goto on_error;
+
+			p->flags |= flags;
+			if (git_pqueue_insert(&list, p) < 0)
+				goto on_error;
+		}
+
+		/* Keep track of root commits, to make sure the path gets marked */
+		if (commit->out_degree == 0) {
+			if (git_commit_list_insert(commit, &roots) == NULL)
+				goto on_error;
+		}
+	}
+
+	git_commit_list_free(&roots);
+	git_pqueue_free(&list);
+	return 0;
+
+on_error:
+	git_commit_list_free(&roots);
+	git_pqueue_free(&list);
+	return -1;
+}
+
+
+static int ahead_behind(git_commit_list_node *one, git_commit_list_node *two,
+	size_t *ahead, size_t *behind)
+{
+	git_commit_list_node *commit;
+	git_pqueue pq;
+	int error = 0, i;
+	*ahead = 0;
+	*behind = 0;
+
+	if (git_pqueue_init(&pq, 0, 2, git_commit_list_time_cmp) < 0)
+		return -1;
+
+	if ((error = git_pqueue_insert(&pq, one)) < 0 ||
+		(error = git_pqueue_insert(&pq, two)) < 0)
+		goto done;
+
+	while ((commit = git_pqueue_pop(&pq)) != NULL) {
+		if (commit->flags & RESULT ||
+			(commit->flags & (PARENT1 | PARENT2)) == (PARENT1 | PARENT2))
+			continue;
+		else if (commit->flags & PARENT1)
+			(*ahead)++;
+		else if (commit->flags & PARENT2)
+			(*behind)++;
+
+		for (i = 0; i < commit->out_degree; i++) {
+			git_commit_list_node *p = commit->parents[i];
+			if ((error = git_pqueue_insert(&pq, p)) < 0)
+				goto done;
+		}
+		commit->flags |= RESULT;
+	}
+
+done:
+	git_pqueue_free(&pq);
+	return error;
+}
+
+int git_graph_ahead_behind(size_t *ahead, size_t *behind, git_repository *repo,
+	const git_oid *local, const git_oid *upstream)
+{
+	git_revwalk *walk;
+	git_commit_list_node *commit_u, *commit_l;
+
+	if (git_revwalk_new(&walk, repo) < 0)
+		return -1;
+
+	commit_u = git_revwalk__commit_lookup(walk, upstream);
+	if (commit_u == NULL)
+		goto on_error;
+
+	commit_l = git_revwalk__commit_lookup(walk, local);
+	if (commit_l == NULL)
+		goto on_error;
+
+	if (mark_parents(walk, commit_l, commit_u) < 0)
+		goto on_error;
+	if (ahead_behind(commit_l, commit_u, ahead, behind) < 0)
+		goto on_error;
+
+	git_revwalk_free(walk);
+
+	return 0;
+
+on_error:
+	git_revwalk_free(walk);
+	return -1;
+}
+
+int git_graph_descendant_of(git_repository *repo, const git_oid *commit, const git_oid *ancestor)
+{
+	git_oid merge_base;
+	int error;
+
+	if (git_oid_equal(commit, ancestor))
+		return 0;
+
+	error = git_merge_base(&merge_base, repo, commit, ancestor);
+	/* No merge-base found, it's not a descendant */
+	if (error == GIT_ENOTFOUND)
+		return 0;
+
+	if (error < 0)
+		return error;
+
+	return git_oid_equal(&merge_base, ancestor);
+}

node_modules/nodegit/vendor/libgit2/src/hash.c

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "hash.h"
+
+int git_hash_global_init(void)
+{
+	return git_hash_sha1_global_init();
+}
+
+int git_hash_ctx_init(git_hash_ctx *ctx)
+{
+	int error;
+
+	if ((error = git_hash_sha1_ctx_init(&ctx->sha1)) < 0)
+		return error;
+
+	ctx->algo = GIT_HASH_ALGO_SHA1;
+
+	return 0;
+}
+
+void git_hash_ctx_cleanup(git_hash_ctx *ctx)
+{
+	switch (ctx->algo) {
+		case GIT_HASH_ALGO_SHA1:
+			git_hash_sha1_ctx_cleanup(&ctx->sha1);
+			return;
+		default:
+			assert(0);
+	}
+}
+
+int git_hash_init(git_hash_ctx *ctx)
+{
+	switch (ctx->algo) {
+		case GIT_HASH_ALGO_SHA1:
+			return git_hash_sha1_init(&ctx->sha1);
+		default:
+			assert(0);
+			return -1;
+	}
+}
+
+int git_hash_update(git_hash_ctx *ctx, const void *data, size_t len)
+{
+	switch (ctx->algo) {
+		case GIT_HASH_ALGO_SHA1:
+			return git_hash_sha1_update(&ctx->sha1, data, len);
+		default:
+			assert(0);
+			return -1;
+	}
+}
+
+int git_hash_final(git_oid *out, git_hash_ctx *ctx)
+{
+	switch (ctx->algo) {
+		case GIT_HASH_ALGO_SHA1:
+			return git_hash_sha1_final(out, &ctx->sha1);
+		default:
+			assert(0);
+			return -1;
+	}
+}
+
+int git_hash_buf(git_oid *out, const void *data, size_t len)
+{
+	git_hash_ctx ctx;
+	int error = 0;
+
+	if (git_hash_ctx_init(&ctx) < 0)
+		return -1;
+
+	if ((error = git_hash_update(&ctx, data, len)) >= 0)
+		error = git_hash_final(out, &ctx);
+
+	git_hash_ctx_cleanup(&ctx);
+	
+	return error;
+}
+
+int git_hash_vec(git_oid *out, git_buf_vec *vec, size_t n)
+{
+	git_hash_ctx ctx;
+	size_t i;
+	int error = 0;
+
+	if (git_hash_ctx_init(&ctx) < 0)
+		return -1;
+
+	for (i = 0; i < n; i++) {
+		if ((error = git_hash_update(&ctx, vec[i].data, vec[i].len)) < 0)
+			goto done;
+	}
+
+	error = git_hash_final(out, &ctx);
+
+done:
+	git_hash_ctx_cleanup(&ctx);
+
+	return error;
+}

node_modules/nodegit/vendor/libgit2/src/hash.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_hash_h__
+#define INCLUDE_hash_h__
+
+#include "common.h"
+
+#include "git2/oid.h"
+
+typedef struct {
+	void *data;
+	size_t len;
+} git_buf_vec;
+
+typedef enum {
+	GIT_HASH_ALGO_UNKNOWN = 0,
+	GIT_HASH_ALGO_SHA1,
+} git_hash_algo_t;
+
+#include "hash/sha1.h"
+
+typedef struct git_hash_ctx {
+	union {
+		git_hash_sha1_ctx sha1;
+	};
+	git_hash_algo_t algo;
+} git_hash_ctx;
+
+int git_hash_global_init(void);
+
+int git_hash_ctx_init(git_hash_ctx *ctx);
+void git_hash_ctx_cleanup(git_hash_ctx *ctx);
+
+int git_hash_init(git_hash_ctx *c);
+int git_hash_update(git_hash_ctx *c, const void *data, size_t len);
+int git_hash_final(git_oid *out, git_hash_ctx *c);
+
+int git_hash_buf(git_oid *out, const void *data, size_t len);
+int git_hash_vec(git_oid *out, git_buf_vec *vec, size_t n);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/hash/sha1.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_hash_sha1_h__
+#define INCLUDE_hash_sha1_h__
+
+#include "common.h"
+
+typedef struct git_hash_sha1_ctx git_hash_sha1_ctx;
+
+#if defined(GIT_SHA1_COLLISIONDETECT)
+# include "sha1/collisiondetect.h"
+#elif defined(GIT_SHA1_COMMON_CRYPTO)
+# include "sha1/common_crypto.h"
+#elif defined(GIT_SHA1_OPENSSL)
+# include "sha1/openssl.h"
+#elif defined(GIT_SHA1_WIN32)
+# include "sha1/win32.h"
+#elif defined(GIT_SHA1_MBEDTLS)
+# include "sha1/mbedtls.h"
+#else
+# include "sha1/generic.h"
+#endif
+
+int git_hash_sha1_global_init(void);
+
+int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx);
+void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx);
+
+int git_hash_sha1_init(git_hash_sha1_ctx *c);
+int git_hash_sha1_update(git_hash_sha1_ctx *c, const void *data, size_t len);
+int git_hash_sha1_final(git_oid *out, git_hash_sha1_ctx *c);
+
+#endif

node_modules/nodegit/vendor/libgit2/src/hash/sha1/collisiondetect.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "collisiondetect.h"
+
+int git_hash_sha1_global_init(void)
+{
+	return 0;
+}
+
+int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)
+{
+	return git_hash_sha1_init(ctx);
+}
+
+void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)
+{
+	GIT_UNUSED(ctx);
+}
+
+int git_hash_sha1_init(git_hash_sha1_ctx *ctx)
+{
+	assert(ctx);
+	SHA1DCInit(&ctx->c);
+	return 0;
+}
+
+int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *data, size_t len)
+{
+	assert(ctx);
+	SHA1DCUpdate(&ctx->c, data, len);
+	return 0;
+}
+
+int git_hash_sha1_final(git_oid *out, git_hash_sha1_ctx *ctx)
+{
+	assert(ctx);
+	if (SHA1DCFinal(out->id, &ctx->c)) {
+		git_error_set(GIT_ERROR_SHA1, "SHA1 collision attack detected");
+		return -1;
+	}
+
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/hash/sha1/collisiondetect.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_hash_sha1_collisiondetect_h__
+#define INCLUDE_hash_sha1_collisiondetect_h__
+
+#include "hash/sha1.h"
+
+#include "sha1dc/sha1.h"
+
+struct git_hash_sha1_ctx {
+	SHA1_CTX c;
+};
+
+#endif

node_modules/nodegit/vendor/libgit2/src/hash/sha1/common_crypto.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common_crypto.h"
+
+#define CC_LONG_MAX ((CC_LONG)-1)
+
+int git_hash_sha1_global_init(void)
+{
+	return 0;
+}
+
+int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)
+{
+	return git_hash_sha1_init(ctx);
+}
+
+void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)
+{
+	GIT_UNUSED(ctx);
+}
+
+int git_hash_sha1_init(git_hash_sha1_ctx *ctx)
+{
+	assert(ctx);
+	CC_SHA1_Init(&ctx->c);
+	return 0;
+}
+
+int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *_data, size_t len)
+{
+	const unsigned char *data = _data;
+
+	assert(ctx);
+
+	while (len > 0) {
+		CC_LONG chunk = (len > CC_LONG_MAX) ? CC_LONG_MAX : (CC_LONG)len;
+
+		CC_SHA1_Update(&ctx->c, data, chunk);
+
+		data += chunk;
+		len -= chunk;
+	}
+
+	return 0;
+}
+
+int git_hash_sha1_final(git_oid *out, git_hash_sha1_ctx *ctx)
+{
+	assert(ctx);
+	CC_SHA1_Final(out->id, &ctx->c);
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/src/hash/sha1/common_crypto.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_hash_sha1_common_crypto_h__
+#define INCLUDE_hash_sha1_common_crypto_h__
+
+#include "hash/sha1.h"
+
+#include <CommonCrypto/CommonDigest.h>
+
+struct git_hash_sha1_ctx {
+	CC_SHA1_CTX c;
+};
+
+#endif

node_modules/nodegit/vendor/libgit2/src/hash/sha1/generic.c

@@ -0,0 +1,300 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "generic.h"
+
+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+
+/*
+ * Force usage of rol or ror by selecting the one with the smaller constant.
+ * It _can_ generate slightly smaller code (a constant of 1 is special), but
+ * perhaps more importantly it's possibly faster on any uarch that does a
+ * rotate with a loop.
+ */
+
+#define SHA_ASM(op, x, n) (__extension__ ({ unsigned int __res; __asm__(op " %1,%0":"=r" (__res):"i" (n), "0" (x)); __res; }))
+#define SHA_ROL(x,n)	SHA_ASM("rol", x, n)
+#define SHA_ROR(x,n)	SHA_ASM("ror", x, n)
+
+#else
+
+#define SHA_ROT(X,l,r)	(((X) << (l)) | ((X) >> (r)))
+#define SHA_ROL(X,n)	SHA_ROT(X,n,32-(n))
+#define SHA_ROR(X,n)	SHA_ROT(X,32-(n),n)
+
+#endif
+
+/*
+ * If you have 32 registers or more, the compiler can (and should)
+ * try to change the array[] accesses into registers. However, on
+ * machines with less than ~25 registers, that won't really work,
+ * and at least gcc will make an unholy mess of it.
+ *
+ * So to avoid that mess which just slows things down, we force
+ * the stores to memory to actually happen (we might be better off
+ * with a 'W(t)=(val);asm("":"+m" (W(t))' there instead, as
+ * suggested by Artur Skawina - that will also make gcc unable to
+ * try to do the silly "optimize away loads" part because it won't
+ * see what the value will be).
+ *
+ * Ben Herrenschmidt reports that on PPC, the C version comes close
+ * to the optimized asm with this (ie on PPC you don't want that
+ * 'volatile', since there are lots of registers).
+ *
+ * On ARM we get the best code generation by forcing a full memory barrier
+ * between each SHA_ROUND, otherwise gcc happily get wild with spilling and
+ * the stack frame size simply explode and performance goes down the drain.
+ */
+
+#if defined(__i386__) || defined(__x86_64__)
+ #define setW(x, val) (*(volatile unsigned int *)&W(x) = (val))
+#elif defined(__GNUC__) && defined(__arm__)
+ #define setW(x, val) do { W(x) = (val); __asm__("":::"memory"); } while (0)
+#else
+ #define setW(x, val) (W(x) = (val))
+#endif
+
+/*
+ * Performance might be improved if the CPU architecture is OK with
+ * unaligned 32-bit loads and a fast ntohl() is available.
+ * Otherwise fall back to byte loads and shifts which is portable,
+ * and is faster on architectures with memory alignment issues.
+ */
+
+#if defined(__i386__) || defined(__x86_64__) || \
+	defined(_M_IX86) || defined(_M_X64) || \
+	defined(__ppc__) || defined(__ppc64__) || \
+	defined(__powerpc__) || defined(__powerpc64__) || \
+	defined(__s390__) || defined(__s390x__)
+
+#define get_be32(p)	ntohl(*(const unsigned int *)(p))
+#define put_be32(p, v)	do { *(unsigned int *)(p) = htonl(v); } while (0)
+
+#else
+
+#define get_be32(p)	( \
+	(*((const unsigned char *)(p) + 0) << 24) | \
+	(*((const unsigned char *)(p) + 1) << 16) | \
+	(*((const unsigned char *)(p) + 2) << 8) | \
+	(*((const unsigned char *)(p) + 3) << 0) )
+#define put_be32(p, v)	do { \
+	unsigned int __v = (v); \
+	*((unsigned char *)(p) + 0) = __v >> 24; \
+	*((unsigned char *)(p) + 1) = __v >> 16; \
+	*((unsigned char *)(p) + 2) = __v >> 8; \
+	*((unsigned char *)(p) + 3) = __v >> 0; } while (0)
+
+#endif
+
+/* This "rolls" over the 512-bit array */
+#define W(x) (array[(x)&15])
+
+/*
+ * Where do we get the source from? The first 16 iterations get it from
+ * the input data, the next mix it from the 512-bit array.
+ */
+#define SHA_SRC(t) get_be32(data + t)
+#define SHA_MIX(t) SHA_ROL(W(t+13) ^ W(t+8) ^ W(t+2) ^ W(t), 1)
+
+#define SHA_ROUND(t, input, fn, constant, A, B, C, D, E) do { \
+	unsigned int TEMP = input(t); setW(t, TEMP); \
+	E += TEMP + SHA_ROL(A,5) + (fn) + (constant); \
+	B = SHA_ROR(B, 2); } while (0)
+
+#define T_0_15(t, A, B, C, D, E) SHA_ROUND(t, SHA_SRC, (((C^D)&B)^D) , 0x5a827999, A, B, C, D, E )
+#define T_16_19(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (((C^D)&B)^D) , 0x5a827999, A, B, C, D, E )
+#define T_20_39(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) , 0x6ed9eba1, A, B, C, D, E )
+#define T_40_59(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, ((B&C)+(D&(B^C))) , 0x8f1bbcdc, A, B, C, D, E )
+#define T_60_79(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) , 0xca62c1d6, A, B, C, D, E )
+
+static void hash__block(git_hash_sha1_ctx *ctx, const unsigned int *data)
+{
+	unsigned int A,B,C,D,E;
+	unsigned int array[16];
+
+	A = ctx->H[0];
+	B = ctx->H[1];
+	C = ctx->H[2];
+	D = ctx->H[3];
+	E = ctx->H[4];
+
+	/* Round 1 - iterations 0-16 take their input from 'data' */
+	T_0_15( 0, A, B, C, D, E);
+	T_0_15( 1, E, A, B, C, D);
+	T_0_15( 2, D, E, A, B, C);
+	T_0_15( 3, C, D, E, A, B);
+	T_0_15( 4, B, C, D, E, A);
+	T_0_15( 5, A, B, C, D, E);
+	T_0_15( 6, E, A, B, C, D);
+	T_0_15( 7, D, E, A, B, C);
+	T_0_15( 8, C, D, E, A, B);
+	T_0_15( 9, B, C, D, E, A);
+	T_0_15(10, A, B, C, D, E);
+	T_0_15(11, E, A, B, C, D);
+	T_0_15(12, D, E, A, B, C);
+	T_0_15(13, C, D, E, A, B);
+	T_0_15(14, B, C, D, E, A);
+	T_0_15(15, A, B, C, D, E);
+
+	/* Round 1 - tail. Input from 512-bit mixing array */
+	T_16_19(16, E, A, B, C, D);
+	T_16_19(17, D, E, A, B, C);
+	T_16_19(18, C, D, E, A, B);
+	T_16_19(19, B, C, D, E, A);
+
+	/* Round 2 */
+	T_20_39(20, A, B, C, D, E);
+	T_20_39(21, E, A, B, C, D);
+	T_20_39(22, D, E, A, B, C);
+	T_20_39(23, C, D, E, A, B);
+	T_20_39(24, B, C, D, E, A);
+	T_20_39(25, A, B, C, D, E);
+	T_20_39(26, E, A, B, C, D);
+	T_20_39(27, D, E, A, B, C);
+	T_20_39(28, C, D, E, A, B);
+	T_20_39(29, B, C, D, E, A);
+	T_20_39(30, A, B, C, D, E);
+	T_20_39(31, E, A, B, C, D);
+	T_20_39(32, D, E, A, B, C);
+	T_20_39(33, C, D, E, A, B);
+	T_20_39(34, B, C, D, E, A);
+	T_20_39(35, A, B, C, D, E);
+	T_20_39(36, E, A, B, C, D);
+	T_20_39(37, D, E, A, B, C);
+	T_20_39(38, C, D, E, A, B);
+	T_20_39(39, B, C, D, E, A);
+
+	/* Round 3 */
+	T_40_59(40, A, B, C, D, E);
+	T_40_59(41, E, A, B, C, D);
+	T_40_59(42, D, E, A, B, C);
+	T_40_59(43, C, D, E, A, B);
+	T_40_59(44, B, C, D, E, A);
+	T_40_59(45, A, B, C, D, E);
+	T_40_59(46, E, A, B, C, D);
+	T_40_59(47, D, E, A, B, C);
+	T_40_59(48, C, D, E, A, B);
+	T_40_59(49, B, C, D, E, A);
+	T_40_59(50, A, B, C, D, E);
+	T_40_59(51, E, A, B, C, D);
+	T_40_59(52, D, E, A, B, C);
+	T_40_59(53, C, D, E, A, B);
+	T_40_59(54, B, C, D, E, A);
+	T_40_59(55, A, B, C, D, E);
+	T_40_59(56, E, A, B, C, D);
+	T_40_59(57, D, E, A, B, C);
+	T_40_59(58, C, D, E, A, B);
+	T_40_59(59, B, C, D, E, A);
+
+	/* Round 4 */
+	T_60_79(60, A, B, C, D, E);
+	T_60_79(61, E, A, B, C, D);
+	T_60_79(62, D, E, A, B, C);
+	T_60_79(63, C, D, E, A, B);
+	T_60_79(64, B, C, D, E, A);
+	T_60_79(65, A, B, C, D, E);
+	T_60_79(66, E, A, B, C, D);
+	T_60_79(67, D, E, A, B, C);
+	T_60_79(68, C, D, E, A, B);
+	T_60_79(69, B, C, D, E, A);
+	T_60_79(70, A, B, C, D, E);
+	T_60_79(71, E, A, B, C, D);
+	T_60_79(72, D, E, A, B, C);
+	T_60_79(73, C, D, E, A, B);
+	T_60_79(74, B, C, D, E, A);
+	T_60_79(75, A, B, C, D, E);
+	T_60_79(76, E, A, B, C, D);
+	T_60_79(77, D, E, A, B, C);
+	T_60_79(78, C, D, E, A, B);
+	T_60_79(79, B, C, D, E, A);
+
+	ctx->H[0] += A;
+	ctx->H[1] += B;
+	ctx->H[2] += C;
+	ctx->H[3] += D;
+	ctx->H[4] += E;
+}
+
+int git_hash_sha1_global_init(void)
+{
+	return 0;
+}
+
+int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)
+{
+	return git_hash_sha1_init(ctx);
+}
+
+void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)
+{
+	GIT_UNUSED(ctx);
+}
+
+int git_hash_sha1_init(git_hash_sha1_ctx *ctx)
+{
+	ctx->size = 0;
+
+	/* Initialize H with the magic constants (see FIPS180 for constants) */
+	ctx->H[0] = 0x67452301;
+	ctx->H[1] = 0xefcdab89;
+	ctx->H[2] = 0x98badcfe;
+	ctx->H[3] = 0x10325476;
+	ctx->H[4] = 0xc3d2e1f0;
+
+	return 0;
+}
+
+int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *data, size_t len)
+{
+	unsigned int lenW = ctx->size & 63;
+
+	ctx->size += len;
+
+	/* Read the data into W and process blocks as they get full */
+	if (lenW) {
+		unsigned int left = 64 - lenW;
+		if (len < left)
+			left = (unsigned int)len;
+		memcpy(lenW + (char *)ctx->W, data, left);
+		lenW = (lenW + left) & 63;
+		len -= left;
+		data = ((const char *)data + left);
+		if (lenW)
+			return 0;
+		hash__block(ctx, ctx->W);
+	}
+	while (len >= 64) {
+		hash__block(ctx, data);
+		data = ((const char *)data + 64);
+		len -= 64;
+	}
+	if (len)
+		memcpy(ctx->W, data, len);
+
+	return 0;
+}
+
+int git_hash_sha1_final(git_oid *out, git_hash_sha1_ctx *ctx)
+{
+	static const unsigned char pad[64] = { 0x80 };
+	unsigned int padlen[2];
+	int i;
+
+	/* Pad with a binary 1 (ie 0x80), then zeroes, then length */
+	padlen[0] = htonl((uint32_t)(ctx->size >> 29));
+	padlen[1] = htonl((uint32_t)(ctx->size << 3));
+
+	i = ctx->size & 63;
+	git_hash_sha1_update(ctx, pad, 1+ (63 & (55 - i)));
+	git_hash_sha1_update(ctx, padlen, 8);
+
+	/* Output hash */
+	for (i = 0; i < 5; i++)
+		put_be32(out->id + i*4, ctx->H[i]);
+
+	return 0;
+}