Initial commit - full huishou project

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

@@ -0,0 +1,15 @@
+INCLUDE_DIRECTORIES(${LIBGIT2_INCLUDES})
+INCLUDE_DIRECTORIES(SYSTEM ${LIBGIT2_SYSTEM_INCLUDES})
+
+FILE(GLOB LG2_SOURCES *.c *.h)
+ADD_EXECUTABLE(lg2 ${LG2_SOURCES})
+SET_TARGET_PROPERTIES(lg2 PROPERTIES C_STANDARD 90)
+
+# Ensure that we do not use deprecated functions internally
+ADD_DEFINITIONS(-DGIT_DEPRECATE_HARD)
+
+IF(WIN32 OR ANDROID)
+	TARGET_LINK_LIBRARIES(lg2 git2)
+ELSE()
+	TARGET_LINK_LIBRARIES(lg2 git2 pthread)
+ENDIF()

node_modules/nodegit/vendor/libgit2/examples/COPYING

@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
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+
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+be judged legally invalid or ineffective under applicable law, then the
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node_modules/nodegit/vendor/libgit2/examples/README.md

@@ -0,0 +1,22 @@
+libgit2 examples
+================
+
+These examples are a mixture of basic emulation of core Git command line
+functions and simple snippets demonstrating libgit2 API usage (for use
+with Docurium).  As a whole, they are not vetted carefully for bugs, error
+handling, and cross-platform compatibility in the same manner as the rest
+of the code in libgit2, so copy with caution.
+
+That being said, you are welcome to copy code from these examples as
+desired when using libgit2. They have been [released to the public domain][cc0],
+so there are no restrictions on their use.
+
+[cc0]: COPYING
+
+For annotated HTML versions, see the "Examples" section of:
+
+    http://libgit2.github.com/libgit2
+
+such as:
+
+    http://libgit2.github.com/libgit2/ex/HEAD/general.html

node_modules/nodegit/vendor/libgit2/examples/add.c

@@ -0,0 +1,170 @@
+/*
+ * libgit2 "add" example - shows how to modify the index
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * The following example demonstrates how to add files with libgit2.
+ *
+ * It will use the repository in the current working directory, and act
+ * on files passed as its parameters.
+ *
+ * Recognized options are:
+ *   -v/--verbose: show the file's status after acting on it.
+ *   -n/--dry-run: do not actually change the index.
+ *   -u/--update: update the index instead of adding to it.
+ */
+
+enum index_mode {
+	INDEX_NONE,
+	INDEX_ADD,
+};
+
+struct index_options {
+	int dry_run;
+	int verbose;
+	git_repository *repo;
+	enum index_mode mode;
+	int add_update;
+};
+
+/* Forward declarations for helpers */
+static void parse_opts(const char **repo_path, struct index_options *opts, struct args_info *args);
+int print_matched_cb(const char *path, const char *matched_pathspec, void *payload);
+
+int lg2_add(git_repository *repo, int argc, char **argv)
+{
+	git_index_matched_path_cb matched_cb = NULL;
+	git_index *index;
+	git_strarray array = {0};
+	struct index_options options;
+	struct args_info args = ARGS_INFO_INIT;
+
+	/* Parse the options & arguments. */
+	parse_opts(NULL, &options, &args);
+	strarray_from_args(&array, &args);
+
+	/* Grab the repository's index. */
+	check_lg2(git_repository_index(&index, repo), "Could not open repository index", NULL);
+
+	/* Setup a callback if the requested options need it */
+	if (options.verbose || options.dry_run) {
+		matched_cb = &print_matched_cb;
+	}
+
+	options.repo = repo;
+
+	/* Perform the requested action with the index and files */
+	if (options.add_update) {
+		git_index_update_all(index, &array, matched_cb, &options);
+	} else {
+		git_index_add_all(index, &array, 0, matched_cb, &options);
+	}
+
+	/* Cleanup memory */
+	git_index_write(index);
+	git_index_free(index);
+
+	return 0;
+}
+
+/*
+ * This callback is called for each file under consideration by
+ * git_index_(update|add)_all above.
+ * It makes uses of the callback's ability to abort the action.
+ */
+int print_matched_cb(const char *path, const char *matched_pathspec, void *payload)
+{
+	struct index_options *opts = (struct index_options *)(payload);
+	int ret;
+	unsigned status;
+	(void)matched_pathspec;
+
+	/* Get the file status */
+	if (git_status_file(&status, opts->repo, path) < 0)
+		return -1;
+
+	if ((status & GIT_STATUS_WT_MODIFIED) || (status & GIT_STATUS_WT_NEW)) {
+		printf("add '%s'\n", path);
+		ret = 0;
+	} else {
+		ret = 1;
+	}
+
+	if (opts->dry_run)
+		ret = 1;
+
+	return ret;
+}
+
+void init_array(git_strarray *array, int argc, char **argv)
+{
+	unsigned int i;
+
+	array->count = argc;
+	array->strings = calloc(array->count, sizeof(char *));
+	assert(array->strings != NULL);
+
+	for (i = 0; i < array->count; i++) {
+		array->strings[i] = argv[i];
+	}
+
+	return;
+}
+
+void print_usage(void)
+{
+	fprintf(stderr, "usage: add [options] [--] file-spec [file-spec] [...]\n\n");
+	fprintf(stderr, "\t-n, --dry-run    dry run\n");
+	fprintf(stderr, "\t-v, --verbose    be verbose\n");
+	fprintf(stderr, "\t-u, --update     update tracked files\n");
+	exit(1);
+}
+
+static void parse_opts(const char **repo_path, struct index_options *opts, struct args_info *args)
+{
+	if (args->argc <= 1)
+		print_usage();
+
+	for (args->pos = 1; args->pos < args->argc; ++args->pos) {
+		const char *curr = args->argv[args->pos];
+
+		if (curr[0] != '-') {
+			if (!strcmp("add", curr)) {
+				opts->mode = INDEX_ADD;
+				continue;
+			} else if (opts->mode == INDEX_NONE) {
+				fprintf(stderr, "missing command: %s", curr);
+				print_usage();
+				break;
+			} else {
+				/* We might be looking at a filename */
+				break;
+			}
+		} else if (match_bool_arg(&opts->verbose, args, "--verbose") ||
+				   match_bool_arg(&opts->dry_run, args, "--dry-run") ||
+				   match_str_arg(repo_path, args, "--git-dir") ||
+				   (opts->mode == INDEX_ADD && match_bool_arg(&opts->add_update, args, "--update"))) {
+			continue;
+		} else if (match_bool_arg(NULL, args, "--help")) {
+			print_usage();
+			break;
+		} else if (match_arg_separator(args)) {
+			break;
+		} else {
+			fprintf(stderr, "Unsupported option %s.\n", curr);
+			print_usage();
+		}
+	}
+}

node_modules/nodegit/vendor/libgit2/examples/args.c

@@ -0,0 +1,197 @@
+#include "common.h"
+#include "args.h"
+
+size_t is_prefixed(const char *str, const char *pfx)
+{
+	size_t len = strlen(pfx);
+	return strncmp(str, pfx, len) ? 0 : len;
+}
+
+int optional_str_arg(
+	const char **out, struct args_info *args, const char *opt, const char *def)
+{
+	const char *found = args->argv[args->pos];
+	size_t len = is_prefixed(found, opt);
+
+	if (!len)
+		return 0;
+
+	if (!found[len]) {
+		if (args->pos + 1 == args->argc) {
+			*out = def;
+			return 1;
+		}
+		args->pos += 1;
+		*out = args->argv[args->pos];
+		return 1;
+	}
+
+	if (found[len] == '=') {
+		*out = found + len + 1;
+		return 1;
+	}
+
+	return 0;
+}
+
+int match_str_arg(
+	const char **out, struct args_info *args, const char *opt)
+{
+	const char *found = args->argv[args->pos];
+	size_t len = is_prefixed(found, opt);
+
+	if (!len)
+		return 0;
+
+	if (!found[len]) {
+		if (args->pos + 1 == args->argc)
+			fatal("expected value following argument", opt);
+		args->pos += 1;
+		*out = args->argv[args->pos];
+		return 1;
+	}
+
+	if (found[len] == '=') {
+		*out = found + len + 1;
+		return 1;
+	}
+
+	return 0;
+}
+
+static const char *match_numeric_arg(struct args_info *args, const char *opt)
+{
+	const char *found = args->argv[args->pos];
+	size_t len = is_prefixed(found, opt);
+
+	if (!len)
+		return NULL;
+
+	if (!found[len]) {
+		if (args->pos + 1 == args->argc)
+			fatal("expected numeric value following argument", opt);
+		args->pos += 1;
+		found = args->argv[args->pos];
+	} else {
+		found = found + len;
+		if (*found == '=')
+			found++;
+	}
+
+	return found;
+}
+
+int match_uint16_arg(
+	uint16_t *out, struct args_info *args, const char *opt)
+{
+	const char *found = match_numeric_arg(args, opt);
+	uint16_t val;
+	char *endptr = NULL;
+
+	if (!found)
+		return 0;
+
+	val = (uint16_t)strtoul(found, &endptr, 0);
+	if (!endptr || *endptr != '\0')
+		fatal("expected number after argument", opt);
+
+	if (out)
+		*out = val;
+	return 1;
+}
+
+int match_uint32_arg(
+	uint32_t *out, struct args_info *args, const char *opt)
+{
+	const char *found = match_numeric_arg(args, opt);
+	uint16_t val;
+	char *endptr = NULL;
+
+	if (!found)
+		return 0;
+
+	val = (uint32_t)strtoul(found, &endptr, 0);
+	if (!endptr || *endptr != '\0')
+		fatal("expected number after argument", opt);
+
+	if (out)
+		*out = val;
+	return 1;
+}
+
+static int match_int_internal(
+	int *out, const char *str, int allow_negative, const char *opt)
+{
+	char *endptr = NULL;
+	int	  val = (int)strtol(str, &endptr, 10);
+
+	if (!endptr || *endptr != '\0')
+		fatal("expected number", opt);
+	else if (val < 0 && !allow_negative)
+		fatal("negative values are not allowed", opt);
+
+	if (out)
+		*out = val;
+
+	return 1;
+}
+
+int match_bool_arg(int *out, struct args_info *args, const char *opt)
+{
+	const char *found = args->argv[args->pos];
+
+	if (!strcmp(found, opt)) {
+		*out = 1;
+		return 1;
+	}
+
+	if (!strncmp(found, "--no-", strlen("--no-")) &&
+	    !strcmp(found + strlen("--no-"), opt + 2)) {
+		*out = 0;
+		return 1;
+	}
+
+	*out = -1;
+	return 0;
+}
+
+int is_integer(int *out, const char *str, int allow_negative)
+{
+	return match_int_internal(out, str, allow_negative, NULL);
+}
+
+int match_int_arg(
+	int *out, struct args_info *args, const char *opt, int allow_negative)
+{
+	const char *found = match_numeric_arg(args, opt);
+	if (!found)
+		return 0;
+	return match_int_internal(out, found, allow_negative, opt);
+}
+
+int match_arg_separator(struct args_info *args)
+{
+	if (args->opts_done)
+		return 1;
+
+	if (strcmp(args->argv[args->pos], "--") != 0)
+		return 0;
+
+	args->opts_done = 1;
+	args->pos++;
+	return 1;
+}
+
+void strarray_from_args(git_strarray *array, struct args_info *args)
+{
+	size_t i;
+
+	array->count = args->argc - args->pos;
+	array->strings = calloc(array->count, sizeof(char *));
+	assert(array->strings != NULL);
+
+	for (i = 0; args->pos < args->argc; ++args->pos) {
+		array->strings[i++] = args->argv[args->pos];
+	}
+	args->pos = args->argc;
+}

node_modules/nodegit/vendor/libgit2/examples/args.h

@@ -0,0 +1,90 @@
+#ifndef INCLUDE_examples_args_h__
+#define INCLUDE_examples_args_h__
+
+/**
+ * Argument-processing helper structure
+ */
+struct args_info {
+	int    argc;
+	char **argv;
+	int    pos;
+	int    opts_done : 1; /**< Did we see a -- separator */
+};
+#define ARGS_INFO_INIT { argc, argv, 0, 0 }
+#define ARGS_CURRENT(args) args->argv[args->pos]
+
+/**
+ * Check if a string has the given prefix.  Returns 0 if not prefixed
+ * or the length of the prefix if it is.
+ */
+extern size_t is_prefixed(const char *str, const char *pfx);
+
+/**
+ * Match an integer string, returning 1 if matched, 0 if not.
+ */
+extern int is_integer(int *out, const char *str, int allow_negative);
+
+/**
+ * Check current `args` entry against `opt` string.  If it matches
+ * exactly, take the next arg as a string; if it matches as a prefix with
+ * an equal sign, take the remainder as a string; if value not supplied,
+ * default value `def` will be given. otherwise return 0.
+ */
+extern int optional_str_arg(
+	const char **out, struct args_info *args, const char *opt, const char *def);
+
+/**
+ * Check current `args` entry against `opt` string.  If it matches
+ * exactly, take the next arg as a string; if it matches as a prefix with
+ * an equal sign, take the remainder as a string; otherwise return 0.
+ */
+extern int match_str_arg(
+	const char **out, struct args_info *args, const char *opt);
+
+/**
+ * Check current `args` entry against `opt` string parsing as uint16.  If
+ * `opt` matches exactly, take the next arg as a uint16_t value; if `opt`
+ * is a prefix (equal sign optional), take the remainder of the arg as a
+ * uint16_t value; otherwise return 0.
+ */
+extern int match_uint16_arg(
+	uint16_t *out, struct args_info *args, const char *opt);
+
+/**
+ * Check current `args` entry against `opt` string parsing as uint32.  If
+ * `opt` matches exactly, take the next arg as a uint16_t value; if `opt`
+ * is a prefix (equal sign optional), take the remainder of the arg as a
+ * uint32_t value; otherwise return 0.
+ */
+extern int match_uint32_arg(
+	uint32_t *out, struct args_info *args, const char *opt);
+
+/**
+ * Check current `args` entry against `opt` string parsing as int.  If
+ * `opt` matches exactly, take the next arg as an int value; if it matches
+ * as a prefix (equal sign optional), take the remainder of the arg as a
+ * int value; otherwise return 0.
+ */
+extern int match_int_arg(
+	int *out, struct args_info *args, const char *opt, int allow_negative);
+
+/**
+ * Check current `args` entry against a "bool" `opt` (ie. --[no-]progress).
+ * If `opt` matches positively, out will be set to 1, or if `opt` matches
+ * negatively, out will be set to 0, and in both cases 1 will be returned.
+ * If neither the positive or the negative form of opt matched, out will be -1,
+ * and 0 will be returned.
+ */
+extern int match_bool_arg(int *out, struct args_info *args, const char *opt);
+
+/**
+ * Check if we're processing past the single -- separator
+ */
+extern int match_arg_separator(struct args_info *args);
+
+/**
+ * Consume all remaining arguments in a git_strarray
+ */
+extern void strarray_from_args(git_strarray *array, struct args_info *args);
+
+#endif

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

@@ -0,0 +1,198 @@
+/*
+ * libgit2 "blame" example - shows how to use the blame API
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates how to invoke the libgit2 blame API to roughly
+ * simulate the output of `git blame` and a few of its command line arguments.
+ */
+
+struct blame_opts {
+	char *path;
+	char *commitspec;
+	int C;
+	int M;
+	int start_line;
+	int end_line;
+	int F;
+};
+static void parse_opts(struct blame_opts *o, int argc, char *argv[]);
+
+int lg2_blame(git_repository *repo, int argc, char *argv[])
+{
+	int line, break_on_null_hunk;
+	git_object_size_t i, rawsize;
+	char spec[1024] = {0};
+	struct blame_opts o = {0};
+	const char *rawdata;
+	git_revspec revspec = {0};
+	git_blame_options blameopts = GIT_BLAME_OPTIONS_INIT;
+	git_blame *blame = NULL;
+	git_blob *blob;
+	git_object *obj;
+
+	parse_opts(&o, argc, argv);
+	if (o.M) blameopts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES;
+	if (o.C) blameopts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES;
+	if (o.F) blameopts.flags |= GIT_BLAME_FIRST_PARENT;
+
+	/**
+	 * The commit range comes in "commitish" form. Use the rev-parse API to
+	 * nail down the end points.
+	 */
+	if (o.commitspec) {
+		check_lg2(git_revparse(&revspec, repo, o.commitspec), "Couldn't parse commit spec", NULL);
+		if (revspec.flags & GIT_REVPARSE_SINGLE) {
+			git_oid_cpy(&blameopts.newest_commit, git_object_id(revspec.from));
+			git_object_free(revspec.from);
+		} else {
+			git_oid_cpy(&blameopts.oldest_commit, git_object_id(revspec.from));
+			git_oid_cpy(&blameopts.newest_commit, git_object_id(revspec.to));
+			git_object_free(revspec.from);
+			git_object_free(revspec.to);
+		}
+	}
+
+	/** Run the blame. */
+	check_lg2(git_blame_file(&blame, repo, o.path, &blameopts), "Blame error", NULL);
+
+	/**
+	 * Get the raw data inside the blob for output. We use the
+	 * `commitish:path/to/file.txt` format to find it.
+	 */
+	if (git_oid_is_zero(&blameopts.newest_commit))
+		strcpy(spec, "HEAD");
+	else
+		git_oid_tostr(spec, sizeof(spec), &blameopts.newest_commit);
+	strcat(spec, ":");
+	strcat(spec, o.path);
+
+	check_lg2(git_revparse_single(&obj, repo, spec), "Object lookup error", NULL);
+	check_lg2(git_blob_lookup(&blob, repo, git_object_id(obj)), "Blob lookup error", NULL);
+	git_object_free(obj);
+
+	rawdata = git_blob_rawcontent(blob);
+	rawsize = git_blob_rawsize(blob);
+
+	/** Produce the output. */
+	line = 1;
+	i = 0;
+	break_on_null_hunk = 0;
+	while (i < rawsize) {
+		const char *eol = memchr(rawdata + i, '\n', (size_t)(rawsize - i));
+		char oid[10] = {0};
+		const git_blame_hunk *hunk = git_blame_get_hunk_byline(blame, line);
+
+		if (break_on_null_hunk && !hunk)
+			break;
+
+		if (hunk) {
+			char sig[128] = {0};
+			break_on_null_hunk = 1;
+
+			git_oid_tostr(oid, 10, &hunk->final_commit_id);
+			snprintf(sig, 30, "%s <%s>", hunk->final_signature->name, hunk->final_signature->email);
+
+			printf("%s ( %-30s %3d) %.*s\n",
+					oid,
+					sig,
+					line,
+					(int)(eol - rawdata - i),
+					rawdata + i);
+		}
+
+		i = (int)(eol - rawdata + 1);
+		line++;
+	}
+
+	/** Cleanup. */
+	git_blob_free(blob);
+	git_blame_free(blame);
+
+	return 0;
+}
+
+/** Tell the user how to make this thing work. */
+static void usage(const char *msg, const char *arg)
+{
+	if (msg && arg)
+		fprintf(stderr, "%s: %s\n", msg, arg);
+	else if (msg)
+		fprintf(stderr, "%s\n", msg);
+	fprintf(stderr, "usage: blame [options] [<commit range>] <path>\n");
+	fprintf(stderr, "\n");
+	fprintf(stderr, "   <commit range>      example: `HEAD~10..HEAD`, or `1234abcd`\n");
+	fprintf(stderr, "   -L <n,m>            process only line range n-m, counting from 1\n");
+	fprintf(stderr, "   -M                  find line moves within and across files\n");
+	fprintf(stderr, "   -C                  find line copies within and across files\n");
+	fprintf(stderr, "   -F                  follow only the first parent commits\n");
+	fprintf(stderr, "\n");
+	exit(1);
+}
+
+/** Parse the arguments. */
+static void parse_opts(struct blame_opts *o, int argc, char *argv[])
+{
+	int i;
+	char *bare_args[3] = {0};
+
+	if (argc < 2) usage(NULL, NULL);
+
+	for (i=1; i<argc; i++) {
+		char *a = argv[i];
+
+		if (a[0] != '-') {
+			int i=0;
+			while (bare_args[i] && i < 3) ++i;
+			if (i >= 3)
+				usage("Invalid argument set", NULL);
+			bare_args[i] = a;
+		}
+		else if (!strcmp(a, "--"))
+			continue;
+		else if (!strcasecmp(a, "-M"))
+			o->M = 1;
+		else if (!strcasecmp(a, "-C"))
+			o->C = 1;
+		else if (!strcasecmp(a, "-F"))
+			o->F = 1;
+		else if (!strcasecmp(a, "-L")) {
+			i++; a = argv[i];
+			if (i >= argc) fatal("Not enough arguments to -L", NULL);
+			check_lg2(sscanf(a, "%d,%d", &o->start_line, &o->end_line)-2, "-L format error", NULL);
+		}
+		else {
+			/* commit range */
+			if (o->commitspec) fatal("Only one commit spec allowed", NULL);
+			o->commitspec = a;
+		}
+	}
+
+	/* Handle the bare arguments */
+	if (!bare_args[0]) usage("Please specify a path", NULL);
+	o->path = bare_args[0];
+	if (bare_args[1]) {
+		/* <commitspec> <path> */
+		o->path = bare_args[1];
+		o->commitspec = bare_args[0];
+	}
+	if (bare_args[2]) {
+		/* <oldcommit> <newcommit> <path> */
+		char spec[128] = {0};
+		o->path = bare_args[2];
+		sprintf(spec, "%s..%s", bare_args[0], bare_args[1]);
+		o->commitspec = spec;
+	}
+}

node_modules/nodegit/vendor/libgit2/examples/cat-file.c

@@ -0,0 +1,239 @@
+/*
+ * libgit2 "cat-file" example - shows how to print data from the ODB
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+static void print_signature(const char *header, const git_signature *sig)
+{
+	char sign;
+	int offset, hours, minutes;
+
+	if (!sig)
+		return;
+
+	offset = sig->when.offset;
+	if (offset < 0) {
+		sign = '-';
+		offset = -offset;
+	} else {
+		sign = '+';
+	}
+
+	hours   = offset / 60;
+	minutes = offset % 60;
+
+	printf("%s %s <%s> %ld %c%02d%02d\n",
+		   header, sig->name, sig->email, (long)sig->when.time,
+		   sign, hours, minutes);
+}
+
+/** Printing out a blob is simple, get the contents and print */
+static void show_blob(const git_blob *blob)
+{
+	/* ? Does this need crlf filtering? */
+	fwrite(git_blob_rawcontent(blob), (size_t)git_blob_rawsize(blob), 1, stdout);
+}
+
+/** Show each entry with its type, id and attributes */
+static void show_tree(const git_tree *tree)
+{
+	size_t i, max_i = (int)git_tree_entrycount(tree);
+	char oidstr[GIT_OID_HEXSZ + 1];
+	const git_tree_entry *te;
+
+	for (i = 0; i < max_i; ++i) {
+		te = git_tree_entry_byindex(tree, i);
+
+		git_oid_tostr(oidstr, sizeof(oidstr), git_tree_entry_id(te));
+
+		printf("%06o %s %s\t%s\n",
+			git_tree_entry_filemode(te),
+			git_object_type2string(git_tree_entry_type(te)),
+			oidstr, git_tree_entry_name(te));
+	}
+}
+
+/**
+ * Commits and tags have a few interesting fields in their header.
+ */
+static void show_commit(const git_commit *commit)
+{
+	unsigned int i, max_i;
+	char oidstr[GIT_OID_HEXSZ + 1];
+
+	git_oid_tostr(oidstr, sizeof(oidstr), git_commit_tree_id(commit));
+	printf("tree %s\n", oidstr);
+
+	max_i = (unsigned int)git_commit_parentcount(commit);
+	for (i = 0; i < max_i; ++i) {
+		git_oid_tostr(oidstr, sizeof(oidstr), git_commit_parent_id(commit, i));
+		printf("parent %s\n", oidstr);
+	}
+
+	print_signature("author", git_commit_author(commit));
+	print_signature("committer", git_commit_committer(commit));
+
+	if (git_commit_message(commit))
+		printf("\n%s\n", git_commit_message(commit));
+}
+
+static void show_tag(const git_tag *tag)
+{
+	char oidstr[GIT_OID_HEXSZ + 1];
+
+	git_oid_tostr(oidstr, sizeof(oidstr), git_tag_target_id(tag));;
+	printf("object %s\n", oidstr);
+	printf("type %s\n", git_object_type2string(git_tag_target_type(tag)));
+	printf("tag %s\n", git_tag_name(tag));
+	print_signature("tagger", git_tag_tagger(tag));
+
+	if (git_tag_message(tag))
+		printf("\n%s\n", git_tag_message(tag));
+}
+
+typedef enum {
+	SHOW_TYPE = 1,
+	SHOW_SIZE = 2,
+	SHOW_NONE = 3,
+	SHOW_PRETTY = 4
+} catfile_mode;
+
+/* Forward declarations for option-parsing helper */
+struct catfile_options {
+	const char *dir;
+	const char *rev;
+	catfile_mode action;
+	int verbose;
+};
+
+static void parse_opts(struct catfile_options *o, int argc, char *argv[]);
+
+
+/** Entry point for this command */
+int lg2_cat_file(git_repository *repo, int argc, char *argv[])
+{
+	struct catfile_options o = { ".", NULL, 0, 0 };
+	git_object *obj = NULL;
+	char oidstr[GIT_OID_HEXSZ + 1];
+
+	parse_opts(&o, argc, argv);
+
+	check_lg2(git_revparse_single(&obj, repo, o.rev),
+			"Could not resolve", o.rev);
+
+	if (o.verbose) {
+		char oidstr[GIT_OID_HEXSZ + 1];
+		git_oid_tostr(oidstr, sizeof(oidstr), git_object_id(obj));
+
+		printf("%s %s\n--\n",
+			git_object_type2string(git_object_type(obj)), oidstr);
+	}
+
+	switch (o.action) {
+	case SHOW_TYPE:
+		printf("%s\n", git_object_type2string(git_object_type(obj)));
+		break;
+	case SHOW_SIZE: {
+		git_odb *odb;
+		git_odb_object *odbobj;
+
+		check_lg2(git_repository_odb(&odb, repo), "Could not open ODB", NULL);
+		check_lg2(git_odb_read(&odbobj, odb, git_object_id(obj)),
+			"Could not find obj", NULL);
+
+		printf("%ld\n", (long)git_odb_object_size(odbobj));
+
+		git_odb_object_free(odbobj);
+		git_odb_free(odb);
+		}
+		break;
+	case SHOW_NONE:
+		/* just want return result */
+		break;
+	case SHOW_PRETTY:
+
+		switch (git_object_type(obj)) {
+		case GIT_OBJECT_BLOB:
+			show_blob((const git_blob *)obj);
+			break;
+		case GIT_OBJECT_COMMIT:
+			show_commit((const git_commit *)obj);
+			break;
+		case GIT_OBJECT_TREE:
+			show_tree((const git_tree *)obj);
+			break;
+		case GIT_OBJECT_TAG:
+			show_tag((const git_tag *)obj);
+			break;
+		default:
+			printf("unknown %s\n", oidstr);
+			break;
+		}
+		break;
+	}
+
+	git_object_free(obj);
+
+	return 0;
+}
+
+/** Print out usage information */
+static void usage(const char *message, const char *arg)
+{
+	if (message && arg)
+		fprintf(stderr, "%s: %s\n", message, arg);
+	else if (message)
+		fprintf(stderr, "%s\n", message);
+	fprintf(stderr,
+			"usage: cat-file (-t | -s | -e | -p) [-v] [-q] "
+			"[-h|--help] [--git-dir=<dir>] <object>\n");
+	exit(1);
+}
+
+/** Parse the command-line options taken from git */
+static void parse_opts(struct catfile_options *o, int argc, char *argv[])
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		char *a = argv[args.pos];
+
+		if (a[0] != '-') {
+			if (o->rev != NULL)
+				usage("Only one rev should be provided", NULL);
+			else
+				o->rev = a;
+		}
+		else if (!strcmp(a, "-t"))
+			o->action = SHOW_TYPE;
+		else if (!strcmp(a, "-s"))
+			o->action = SHOW_SIZE;
+		else if (!strcmp(a, "-e"))
+			o->action = SHOW_NONE;
+		else if (!strcmp(a, "-p"))
+			o->action = SHOW_PRETTY;
+		else if (!strcmp(a, "-q"))
+			o->verbose = 0;
+		else if (!strcmp(a, "-v"))
+			o->verbose = 1;
+		else if (!strcmp(a, "--help") || !strcmp(a, "-h"))
+			usage(NULL, NULL);
+		else if (!match_str_arg(&o->dir, &args, "--git-dir"))
+			usage("Unknown option", a);
+	}
+
+	if (!o->action || !o->rev)
+		usage(NULL, NULL);
+
+}

node_modules/nodegit/vendor/libgit2/examples/checkout.c

@@ -0,0 +1,290 @@
+/*
+ * libgit2 "checkout" example - shows how to perform checkouts
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/* Define the printf format specifer to use for size_t output */
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#	define PRIuZ "Iu"
+#	define PRIxZ "Ix"
+#	define PRIdZ "Id"
+#else
+#	define PRIuZ "zu"
+#	define PRIxZ "zx"
+#	define PRIdZ "zd"
+#endif
+
+/**
+ * The following example demonstrates how to do checkouts with libgit2.
+ *
+ * Recognized options are :
+ *  --force: force the checkout to happen.
+ *  --[no-]progress: show checkout progress, on by default.
+ *  --perf: show performance data.
+ */
+
+typedef struct {
+	int force : 1;
+	int progress : 1;
+	int perf : 1;
+} checkout_options;
+
+static void print_usage(void)
+{
+	fprintf(stderr, "usage: checkout [options] <branch>\n"
+		"Options are :\n"
+		"  --git-dir: use the following git repository.\n"
+		"  --force: force the checkout.\n"
+		"  --[no-]progress: show checkout progress.\n"
+		"  --perf: show performance data.\n");
+	exit(1);
+}
+
+static void parse_options(const char **repo_path, checkout_options *opts, struct args_info *args)
+{
+	if (args->argc <= 1)
+		print_usage();
+
+	memset(opts, 0, sizeof(*opts));
+
+	/* Default values */
+	opts->progress = 1;
+
+	for (args->pos = 1; args->pos < args->argc; ++args->pos) {
+		const char *curr = args->argv[args->pos];
+		int bool_arg;
+
+		if (match_arg_separator(args)) {
+			break;
+		} else if (!strcmp(curr, "--force")) {
+			opts->force = 1;
+		} else if (match_bool_arg(&bool_arg, args, "--progress")) {
+			opts->progress = bool_arg;
+		} else if (match_bool_arg(&bool_arg, args, "--perf")) {
+			opts->perf = bool_arg;
+		} else if (match_str_arg(repo_path, args, "--git-dir")) {
+			continue;
+		} else {
+			break;
+		}
+	}
+}
+
+/**
+ * This function is called to report progression, ie. it's called once with
+ * a NULL path and the number of total steps, then for each subsequent path,
+ * the current completed_step value.
+ */
+static void print_checkout_progress(const char *path, size_t completed_steps, size_t total_steps, void *payload)
+{
+	(void)payload;
+	if (path == NULL) {
+		printf("checkout started: %" PRIuZ " steps\n", total_steps);
+	} else {
+		printf("checkout: %s %" PRIuZ "/%" PRIuZ "\n", path, completed_steps, total_steps);
+	}
+}
+
+/**
+ * This function is called when the checkout completes, and is used to report the
+ * number of syscalls performed.
+ */
+static void print_perf_data(const git_checkout_perfdata *perfdata, void *payload)
+{
+	(void)payload;
+	printf("perf: stat: %" PRIuZ " mkdir: %" PRIuZ " chmod: %" PRIuZ "\n",
+	       perfdata->stat_calls, perfdata->mkdir_calls, perfdata->chmod_calls);
+}
+
+/**
+ * This is the main "checkout <branch>" function, responsible for performing
+ * a branch-based checkout.
+ */
+static int perform_checkout_ref(git_repository *repo, git_annotated_commit *target, const char *target_ref, checkout_options *opts)
+{
+	git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
+	git_reference *ref = NULL, *branch = NULL;
+	git_commit *target_commit = NULL;
+	int err;
+
+	/** Setup our checkout options from the parsed options */
+	checkout_opts.checkout_strategy = GIT_CHECKOUT_SAFE;
+	if (opts->force)
+		checkout_opts.checkout_strategy = GIT_CHECKOUT_FORCE;
+
+	if (opts->progress)
+		checkout_opts.progress_cb = print_checkout_progress;
+
+	if (opts->perf)
+		checkout_opts.perfdata_cb = print_perf_data;
+
+	/** Grab the commit we're interested to move to */
+	err = git_commit_lookup(&target_commit, repo, git_annotated_commit_id(target));
+	if (err != 0) {
+		fprintf(stderr, "failed to lookup commit: %s\n", git_error_last()->message);
+		goto cleanup;
+	}
+
+	/**
+	 * Perform the checkout so the workdir corresponds to what target_commit
+	 * contains.
+	 *
+	 * Note that it's okay to pass a git_commit here, because it will be
+	 * peeled to a tree.
+	 */
+	err = git_checkout_tree(repo, (const git_object *)target_commit, &checkout_opts);
+	if (err != 0) {
+		fprintf(stderr, "failed to checkout tree: %s\n", git_error_last()->message);
+		goto cleanup;
+	}
+
+	/**
+	 * Now that the checkout has completed, we have to update HEAD.
+	 *
+	 * Depending on the "origin" of target (ie. it's an OID or a branch name),
+	 * we might need to detach HEAD.
+	 */
+	if (git_annotated_commit_ref(target)) {
+		const char *target_head;
+
+		if ((err = git_reference_lookup(&ref, repo, git_annotated_commit_ref(target))) < 0)
+			goto error;
+
+		if (git_reference_is_remote(ref)) {
+			if ((err = git_branch_create_from_annotated(&branch, repo, target_ref, target, 0)) < 0)
+				goto error;
+			target_head = git_reference_name(branch);
+		} else {
+			target_head = git_annotated_commit_ref(target);
+		}
+
+		err = git_repository_set_head(repo, target_head);
+	} else {
+		err = git_repository_set_head_detached_from_annotated(repo, target);
+	}
+
+error:
+	if (err != 0) {
+		fprintf(stderr, "failed to update HEAD reference: %s\n", git_error_last()->message);
+		goto cleanup;
+	}
+
+cleanup:
+	git_commit_free(target_commit);
+	git_reference_free(branch);
+	git_reference_free(ref);
+
+	return err;
+}
+
+/**
+ * This corresponds to `git switch --guess`: if a given ref does
+ * not exist, git will by default try to guess the reference by
+ * seeing whether any remote has a branch called <ref>. If there
+ * is a single remote only that has it, then it is assumed to be
+ * the desired reference and a local branch is created for it.
+ *
+ * The following is a simplified implementation. It will not try
+ * to check whether the ref is unique across all remotes.
+ */
+static int guess_refish(git_annotated_commit **out, git_repository *repo, const char *ref)
+{
+	git_strarray remotes = { NULL, 0 };
+	git_reference *remote_ref = NULL;
+	int error;
+	size_t i;
+
+	if ((error = git_remote_list(&remotes, repo)) < 0)
+		goto out;
+
+	for (i = 0; i < remotes.count; i++) {
+		char *refname = NULL;
+		size_t reflen;
+
+		reflen = snprintf(refname, 0, "refs/remotes/%s/%s", remotes.strings[i], ref);
+		if ((refname = malloc(reflen + 1)) == NULL) {
+			error = -1;
+			goto next;
+		}
+		snprintf(refname, reflen + 1, "refs/remotes/%s/%s", remotes.strings[i], ref);
+
+		if ((error = git_reference_lookup(&remote_ref, repo, refname)) < 0)
+			goto next;
+
+		break;
+next:
+		free(refname);
+		if (error < 0 && error != GIT_ENOTFOUND)
+			break;
+	}
+
+	if (!remote_ref) {
+		error = GIT_ENOTFOUND;
+		goto out;
+	}
+
+	if ((error = git_annotated_commit_from_ref(out, repo, remote_ref)) < 0)
+		goto out;
+
+out:
+	git_reference_free(remote_ref);
+	git_strarray_free(&remotes);
+	return error;
+}
+
+/** That example's entry point */
+int lg2_checkout(git_repository *repo, int argc, char **argv)
+{
+	struct args_info args = ARGS_INFO_INIT;
+	checkout_options opts;
+	git_repository_state_t state;
+	git_annotated_commit *checkout_target = NULL;
+	int err = 0;
+	const char *path = ".";
+
+	/** Parse our command line options */
+	parse_options(&path, &opts, &args);
+
+	/** Make sure we're not about to checkout while something else is going on */
+	state = git_repository_state(repo);
+	if (state != GIT_REPOSITORY_STATE_NONE) {
+		fprintf(stderr, "repository is in unexpected state %d\n", state);
+		goto cleanup;
+	}
+
+	if (match_arg_separator(&args)) {
+		/**
+		 * Try to checkout the given path
+		 */
+
+		fprintf(stderr, "unhandled path-based checkout\n");
+		err = 1;
+		goto cleanup;
+	} else {
+		/**
+		 * Try to resolve a "refish" argument to a target libgit2 can use
+		 */
+		if ((err = resolve_refish(&checkout_target, repo, args.argv[args.pos])) < 0 &&
+		    (err = guess_refish(&checkout_target, repo, args.argv[args.pos])) < 0) {
+			fprintf(stderr, "failed to resolve %s: %s\n", args.argv[args.pos], git_error_last()->message);
+			goto cleanup;
+		}
+		err = perform_checkout_ref(repo, checkout_target, args.argv[args.pos], &opts);
+	}
+
+cleanup:
+	git_annotated_commit_free(checkout_target);
+
+	return err;
+}

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

@@ -0,0 +1,104 @@
+#include "common.h"
+
+typedef struct progress_data {
+	git_indexer_progress fetch_progress;
+	size_t completed_steps;
+	size_t total_steps;
+	const char *path;
+} progress_data;
+
+static void print_progress(const progress_data *pd)
+{
+	int network_percent = pd->fetch_progress.total_objects > 0 ?
+		(100*pd->fetch_progress.received_objects) / pd->fetch_progress.total_objects :
+		0;
+	int index_percent = pd->fetch_progress.total_objects > 0 ?
+		(100*pd->fetch_progress.indexed_objects) / pd->fetch_progress.total_objects :
+		0;
+
+	int checkout_percent = pd->total_steps > 0
+		? (int)((100 * pd->completed_steps) / pd->total_steps)
+		: 0;
+	size_t kbytes = pd->fetch_progress.received_bytes / 1024;
+
+	if (pd->fetch_progress.total_objects &&
+		pd->fetch_progress.received_objects == pd->fetch_progress.total_objects) {
+		printf("Resolving deltas %u/%u\r",
+		       pd->fetch_progress.indexed_deltas,
+		       pd->fetch_progress.total_deltas);
+	} else {
+		printf("net %3d%% (%4" PRIuZ " kb, %5u/%5u)  /  idx %3d%% (%5u/%5u)  /  chk %3d%% (%4" PRIuZ "/%4" PRIuZ")%s\n",
+		   network_percent, kbytes,
+		   pd->fetch_progress.received_objects, pd->fetch_progress.total_objects,
+		   index_percent, pd->fetch_progress.indexed_objects, pd->fetch_progress.total_objects,
+		   checkout_percent,
+		   pd->completed_steps, pd->total_steps,
+		   pd->path);
+	}
+}
+
+static int sideband_progress(const char *str, int len, void *payload)
+{
+	(void)payload; /* unused */
+
+	printf("remote: %.*s", len, str);
+	fflush(stdout);
+	return 0;
+}
+
+static int fetch_progress(const git_indexer_progress *stats, void *payload)
+{
+	progress_data *pd = (progress_data*)payload;
+	pd->fetch_progress = *stats;
+	print_progress(pd);
+	return 0;
+}
+static void checkout_progress(const char *path, size_t cur, size_t tot, void *payload)
+{
+	progress_data *pd = (progress_data*)payload;
+	pd->completed_steps = cur;
+	pd->total_steps = tot;
+	pd->path = path;
+	print_progress(pd);
+}
+
+
+int lg2_clone(git_repository *repo, int argc, char **argv)
+{
+	progress_data pd = {{0}};
+	git_repository *cloned_repo = NULL;
+	git_clone_options clone_opts = GIT_CLONE_OPTIONS_INIT;
+	git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
+	const char *url = argv[1];
+	const char *path = argv[2];
+	int error;
+
+	(void)repo; /* unused */
+
+	/* Validate args */
+	if (argc < 3) {
+		printf ("USAGE: %s <url> <path>\n", argv[0]);
+		return -1;
+	}
+
+	/* Set up options */
+	checkout_opts.checkout_strategy = GIT_CHECKOUT_SAFE;
+	checkout_opts.progress_cb = checkout_progress;
+	checkout_opts.progress_payload = &pd;
+	clone_opts.checkout_opts = checkout_opts;
+	clone_opts.fetch_opts.callbacks.sideband_progress = sideband_progress;
+	clone_opts.fetch_opts.callbacks.transfer_progress = &fetch_progress;
+	clone_opts.fetch_opts.callbacks.credentials = cred_acquire_cb;
+	clone_opts.fetch_opts.callbacks.payload = &pd;
+
+	/* Do the clone */
+	error = git_clone(&cloned_repo, url, path, &clone_opts);
+	printf("\n");
+	if (error != 0) {
+		const git_error *err = git_error_last();
+		if (err) printf("ERROR %d: %s\n", err->klass, err->message);
+		else printf("ERROR %d: no detailed info\n", error);
+	}
+	else if (cloned_repo) git_repository_free(cloned_repo);
+	return error;
+}

node_modules/nodegit/vendor/libgit2/examples/common.c

@@ -0,0 +1,260 @@
+/*
+ * Utilities library for libgit2 examples
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+
+#include "common.h"
+
+#ifndef _WIN32
+# include <unistd.h>
+#endif
+#include <errno.h>
+
+void check_lg2(int error, const char *message, const char *extra)
+{
+	const git_error *lg2err;
+	const char *lg2msg = "", *lg2spacer = "";
+
+	if (!error)
+		return;
+
+	if ((lg2err = git_error_last()) != NULL && lg2err->message != NULL) {
+		lg2msg = lg2err->message;
+		lg2spacer = " - ";
+	}
+
+	if (extra)
+		fprintf(stderr, "%s '%s' [%d]%s%s\n",
+			message, extra, error, lg2spacer, lg2msg);
+	else
+		fprintf(stderr, "%s [%d]%s%s\n",
+			message, error, lg2spacer, lg2msg);
+
+	exit(1);
+}
+
+void fatal(const char *message, const char *extra)
+{
+	if (extra)
+		fprintf(stderr, "%s %s\n", message, extra);
+	else
+		fprintf(stderr, "%s\n", message);
+
+	exit(1);
+}
+
+int diff_output(
+	const git_diff_delta *d,
+	const git_diff_hunk *h,
+	const git_diff_line *l,
+	void *p)
+{
+	FILE *fp = (FILE*)p;
+
+	(void)d; (void)h;
+
+	if (!fp)
+		fp = stdout;
+
+	if (l->origin == GIT_DIFF_LINE_CONTEXT ||
+		l->origin == GIT_DIFF_LINE_ADDITION ||
+		l->origin == GIT_DIFF_LINE_DELETION)
+		fputc(l->origin, fp);
+
+	fwrite(l->content, 1, l->content_len, fp);
+
+	return 0;
+}
+
+void treeish_to_tree(
+	git_tree **out, git_repository *repo, const char *treeish)
+{
+	git_object *obj = NULL;
+
+	check_lg2(
+		git_revparse_single(&obj, repo, treeish),
+		"looking up object", treeish);
+
+	check_lg2(
+		git_object_peel((git_object **)out, obj, GIT_OBJECT_TREE),
+		"resolving object to tree", treeish);
+
+	git_object_free(obj);
+}
+
+void *xrealloc(void *oldp, size_t newsz)
+{
+	void *p = realloc(oldp, newsz);
+	if (p == NULL) {
+		fprintf(stderr, "Cannot allocate memory, exiting.\n");
+		exit(1);
+	}
+	return p;
+}
+
+int resolve_refish(git_annotated_commit **commit, git_repository *repo, const char *refish)
+{
+	git_reference *ref;
+	git_object *obj;
+	int err = 0;
+
+	assert(commit != NULL);
+
+	err = git_reference_dwim(&ref, repo, refish);
+	if (err == GIT_OK) {
+		git_annotated_commit_from_ref(commit, repo, ref);
+		git_reference_free(ref);
+		return 0;
+	}
+
+	err = git_revparse_single(&obj, repo, refish);
+	if (err == GIT_OK) {
+		err = git_annotated_commit_lookup(commit, repo, git_object_id(obj));
+		git_object_free(obj);
+	}
+
+	return err;
+}
+
+static int readline(char **out)
+{
+	int c, error = 0, length = 0, allocated = 0;
+	char *line = NULL;
+
+	errno = 0;
+
+	while ((c = getchar()) != EOF) {
+		if (length == allocated) {
+			allocated += 16;
+
+			if ((line = realloc(line, allocated)) == NULL) {
+				error = -1;
+				goto error;
+			}
+		}
+
+		if (c == '\n')
+			break;
+
+		line[length++] = c;
+	}
+
+	if (errno != 0) {
+		error = -1;
+		goto error;
+	}
+
+	line[length] = '\0';
+	*out = line;
+	line = NULL;
+	error = length;
+error:
+	free(line);
+	return error;
+}
+
+static int ask(char **out, const char *prompt, char optional)
+{
+	printf("%s ", prompt);
+	fflush(stdout);
+
+	if (!readline(out) && !optional) {
+		fprintf(stderr, "Could not read response: %s", strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+int cred_acquire_cb(git_cred **out,
+		const char *url,
+		const char *username_from_url,
+		unsigned int allowed_types,
+		void *payload)
+{
+	char *username = NULL, *password = NULL, *privkey = NULL, *pubkey = NULL;
+	int error = 1;
+
+	UNUSED(url);
+	UNUSED(payload);
+
+	if (username_from_url) {
+		if ((username = strdup(username_from_url)) == NULL)
+			goto out;
+	} else if ((error = ask(&username, "Username:", 0)) < 0) {
+		goto out;
+	}
+
+	if (allowed_types & GIT_CREDTYPE_SSH_KEY) {
+		int n;
+
+		if ((error = ask(&privkey, "SSH Key:", 0)) < 0 ||
+		    (error = ask(&password, "Password:", 1)) < 0)
+			goto out;
+
+		if ((n = snprintf(NULL, 0, "%s.pub", privkey)) < 0 ||
+		    (pubkey = malloc(n + 1)) == NULL ||
+		    (n = snprintf(pubkey, n + 1, "%s.pub", privkey)) < 0)
+			goto out;
+
+		error = git_cred_ssh_key_new(out, username, pubkey, privkey, password);
+	} else if (allowed_types & GIT_CREDTYPE_USERPASS_PLAINTEXT) {
+		if ((error = ask(&password, "Password:", 1)) < 0)
+			goto out;
+
+		error = git_cred_userpass_plaintext_new(out, username, password);
+	} else if (allowed_types & GIT_CREDTYPE_USERNAME) {
+		error = git_cred_username_new(out, username);
+	}
+
+out:
+	free(username);
+	free(password);
+	free(privkey);
+	free(pubkey);
+	return error;
+}
+
+char *read_file(const char *path)
+{
+	ssize_t total = 0;
+	char *buf = NULL;
+	struct stat st;
+	int fd = -1;
+
+	if ((fd = open(path, O_RDONLY)) < 0 || fstat(fd, &st) < 0)
+		goto out;
+
+	if ((buf = malloc(st.st_size + 1)) == NULL)
+		goto out;
+
+	while (total < st.st_size) {
+		ssize_t bytes = read(fd, buf + total, st.st_size - total);
+		if (bytes <= 0) {
+			if (errno == EAGAIN || errno == EINTR)
+				 continue;
+			free(buf);
+			buf = NULL;
+			goto out;
+		}
+		total += bytes;
+	}
+
+	buf[total] = '\0';
+
+out:
+	if (fd >= 0)
+		close(fd);
+	return buf;
+}
+

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

@@ -0,0 +1,134 @@
+/*
+ * Utilities library for libgit2 examples
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+#ifndef INCLUDE_examples_common_h__
+#define INCLUDE_examples_common_h__
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <git2.h>
+#include <fcntl.h>
+
+#ifdef _WIN32
+# include <io.h>
+# include <Windows.h>
+# define open _open
+# define read _read
+# define close _close
+# define ssize_t int
+# define sleep(a) Sleep(a * 1000)
+#else
+# include <unistd.h>
+#endif
+
+#ifndef PRIuZ
+/* Define the printf format specifer to use for size_t output */
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#	define PRIuZ "Iu"
+#else
+#	define PRIuZ "zu"
+#endif
+#endif
+
+#ifdef _MSC_VER
+#define snprintf sprintf_s
+#define strcasecmp strcmpi
+#endif
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x))
+#define UNUSED(x) (void)(x)
+
+#include "args.h"
+
+extern int lg2_add(git_repository *repo, int argc, char **argv);
+extern int lg2_blame(git_repository *repo, int argc, char **argv);
+extern int lg2_cat_file(git_repository *repo, int argc, char **argv);
+extern int lg2_checkout(git_repository *repo, int argc, char **argv);
+extern int lg2_clone(git_repository *repo, int argc, char **argv);
+extern int lg2_config(git_repository *repo, int argc, char **argv);
+extern int lg2_describe(git_repository *repo, int argc, char **argv);
+extern int lg2_diff(git_repository *repo, int argc, char **argv);
+extern int lg2_fetch(git_repository *repo, int argc, char **argv);
+extern int lg2_for_each_ref(git_repository *repo, int argc, char **argv);
+extern int lg2_general(git_repository *repo, int argc, char **argv);
+extern int lg2_index_pack(git_repository *repo, int argc, char **argv);
+extern int lg2_init(git_repository *repo, int argc, char **argv);
+extern int lg2_log(git_repository *repo, int argc, char **argv);
+extern int lg2_ls_files(git_repository *repo, int argc, char **argv);
+extern int lg2_ls_remote(git_repository *repo, int argc, char **argv);
+extern int lg2_merge(git_repository *repo, int argc, char **argv);
+extern int lg2_remote(git_repository *repo, int argc, char **argv);
+extern int lg2_rev_list(git_repository *repo, int argc, char **argv);
+extern int lg2_rev_parse(git_repository *repo, int argc, char **argv);
+extern int lg2_show_index(git_repository *repo, int argc, char **argv);
+extern int lg2_stash(git_repository *repo, int argc, char **argv);
+extern int lg2_status(git_repository *repo, int argc, char **argv);
+extern int lg2_tag(git_repository *repo, int argc, char **argv);
+
+/**
+ * Check libgit2 error code, printing error to stderr on failure and
+ * exiting the program.
+ */
+extern void check_lg2(int error, const char *message, const char *extra);
+
+/**
+ * Read a file into a buffer
+ *
+ * @param path The path to the file that shall be read
+ * @return NUL-terminated buffer if the file was successfully read, NULL-pointer otherwise
+ */
+extern char *read_file(const char *path);
+
+/**
+ * Exit the program, printing error to stderr
+ */
+extern void fatal(const char *message, const char *extra);
+
+/**
+ * Basic output function for plain text diff output
+ * Pass `FILE*` such as `stdout` or `stderr` as payload (or NULL == `stdout`)
+ */
+extern int diff_output(
+	const git_diff_delta*, const git_diff_hunk*, const git_diff_line*, void*);
+
+/**
+ * Convert a treeish argument to an actual tree; this will call check_lg2
+ * and exit the program if `treeish` cannot be resolved to a tree
+ */
+extern void treeish_to_tree(
+	git_tree **out, git_repository *repo, const char *treeish);
+
+/**
+ * A realloc that exits on failure
+ */
+extern void *xrealloc(void *oldp, size_t newsz);
+
+/**
+ * Convert a refish to an annotated commit.
+ */
+extern int resolve_refish(git_annotated_commit **commit, git_repository *repo, const char *refish);
+
+/**
+ * Acquire credentials via command line
+ */
+extern int cred_acquire_cb(git_cred **out,
+		const char *url,
+		const char *username_from_url,
+		unsigned int allowed_types,
+		void *payload);
+
+#endif

node_modules/nodegit/vendor/libgit2/examples/config.c

@@ -0,0 +1,62 @@
+/*
+ * libgit2 "config" example - shows how to use the config API
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+static int config_get(git_config *cfg, const char *key)
+{
+	git_config_entry *entry;
+	int error;
+
+	if ((error = git_config_get_entry(&entry, cfg, key)) < 0) {
+		if (error != GIT_ENOTFOUND)
+			printf("Unable to get configuration: %s\n", git_error_last()->message);
+		return 1;
+	}
+
+	puts(entry->value);
+	return 0;
+}
+
+static int config_set(git_config *cfg, const char *key, const char *value)
+{
+	if (git_config_set_string(cfg, key, value) < 0) {
+		printf("Unable to set configuration: %s\n", git_error_last()->message);
+		return 1;
+	}
+	return 0;
+}
+
+int lg2_config(git_repository *repo, int argc, char **argv)
+{
+	git_config *cfg;
+	int error;
+
+	if ((error = git_repository_config(&cfg, repo)) < 0) {
+		printf("Unable to obtain repository config: %s\n", git_error_last()->message);
+		goto out;
+	}
+
+	if (argc == 2) {
+		error = config_get(cfg, argv[1]);
+	} else if (argc == 3) {
+		error = config_set(cfg, argv[1], argv[2]);
+	} else {
+		printf("USAGE: %s config <KEY> [<VALUE>]\n", argv[0]);
+		error = 1;
+	}
+
+out:
+	return error;
+}

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

@@ -0,0 +1,162 @@
+/*
+ * libgit2 "describe" example - shows how to describe commits
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * The following example partially reimplements the `git describe` command
+ * and some of its options.
+ *
+ * These commands should work:
+
+ * - Describe HEAD with default options (`describe`)
+ * - Describe specified revision (`describe master~2`)
+ * - Describe specified revisions (`describe master~2 HEAD~3`)
+ * - Describe HEAD with dirty state suffix (`describe --dirty=*`)
+ * - Describe consider all refs (`describe --all master`)
+ * - Describe consider lightweight tags (`describe --tags temp-tag`)
+ * - Describe show non-default abbreviated size (`describe --abbrev=10`)
+ * - Describe always output the long format if matches a tag (`describe --long v1.0`)
+ * - Describe consider only tags of specified pattern (`describe --match v*-release`)
+ * - Describe show the fallback result (`describe --always`)
+ * - Describe follow only the first parent commit (`describe --first-parent`)
+ *
+ * The command line parsing logic is simplified and doesn't handle
+ * all of the use cases.
+ */
+
+/** describe_options represents the parsed command line options */
+struct describe_options {
+	const char **commits;
+	size_t commit_count;
+	git_describe_options describe_options;
+	git_describe_format_options format_options;
+};
+
+static void opts_add_commit(struct describe_options *opts, const char *commit)
+{
+	size_t sz;
+
+	assert(opts != NULL);
+
+	sz = ++opts->commit_count * sizeof(opts->commits[0]);
+	opts->commits = xrealloc((void *) opts->commits, sz);
+	opts->commits[opts->commit_count - 1] = commit;
+}
+
+static void do_describe_single(git_repository *repo, struct describe_options *opts, const char *rev)
+{
+	git_object *commit;
+	git_describe_result *describe_result;
+	git_buf buf = { 0 };
+
+	if (rev) {
+		check_lg2(git_revparse_single(&commit, repo, rev),
+			"Failed to lookup rev", rev);
+
+		check_lg2(git_describe_commit(&describe_result, commit, &opts->describe_options),
+			"Failed to describe rev", rev);
+	}
+	else
+		check_lg2(git_describe_workdir(&describe_result, repo, &opts->describe_options),
+			"Failed to describe workdir", NULL);
+
+	check_lg2(git_describe_format(&buf, describe_result, &opts->format_options),
+			"Failed to format describe rev", rev);
+
+	printf("%s\n", buf.ptr);
+}
+
+static void do_describe(git_repository *repo, struct describe_options *opts)
+{
+	if (opts->commit_count == 0)
+		do_describe_single(repo, opts, NULL);
+	else
+	{
+		size_t i;
+		for (i = 0; i < opts->commit_count; i++)
+			do_describe_single(repo, opts, opts->commits[i]);
+	}
+}
+
+static void print_usage(void)
+{
+	fprintf(stderr, "usage: see `git help describe`\n");
+	exit(1);
+}
+
+/** Parse command line arguments */
+static void parse_options(struct describe_options *opts, int argc, char **argv)
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		const char *curr = argv[args.pos];
+
+		if (curr[0] != '-') {
+			opts_add_commit(opts, curr);
+		} else if (!strcmp(curr, "--all")) {
+			opts->describe_options.describe_strategy = GIT_DESCRIBE_ALL;
+		} else if (!strcmp(curr, "--tags")) {
+			opts->describe_options.describe_strategy = GIT_DESCRIBE_TAGS;
+		} else if (!strcmp(curr, "--exact-match")) {
+			opts->describe_options.max_candidates_tags = 0;
+		} else if (!strcmp(curr, "--long")) {
+			opts->format_options.always_use_long_format = 1;
+		} else if (!strcmp(curr, "--always")) {
+			opts->describe_options.show_commit_oid_as_fallback = 1;
+		} else if (!strcmp(curr, "--first-parent")) {
+			opts->describe_options.only_follow_first_parent = 1;
+		} else if (optional_str_arg(&opts->format_options.dirty_suffix, &args, "--dirty", "-dirty")) {
+		} else if (match_int_arg((int *)&opts->format_options.abbreviated_size, &args, "--abbrev", 0)) {
+		} else if (match_int_arg((int *)&opts->describe_options.max_candidates_tags, &args, "--candidates", 0)) {
+		} else if (match_str_arg(&opts->describe_options.pattern, &args, "--match")) {
+		} else {
+			print_usage();
+		}
+	}
+
+	if (opts->commit_count > 0) {
+		if (opts->format_options.dirty_suffix)
+			fatal("--dirty is incompatible with commit-ishes", NULL);
+	}
+	else {
+		if (!opts->format_options.dirty_suffix || !opts->format_options.dirty_suffix[0]) {
+			opts_add_commit(opts, "HEAD");
+		}
+	}
+}
+
+/** Initialize describe_options struct */
+static void describe_options_init(struct describe_options *opts)
+{
+	memset(opts, 0, sizeof(*opts));
+
+	opts->commits = NULL;
+	opts->commit_count = 0;
+	git_describe_options_init(&opts->describe_options, GIT_DESCRIBE_OPTIONS_VERSION);
+	git_describe_format_options_init(&opts->format_options, GIT_DESCRIBE_FORMAT_OPTIONS_VERSION);
+}
+
+int lg2_describe(git_repository *repo, int argc, char **argv)
+{
+	struct describe_options opts;
+
+	describe_options_init(&opts);
+	parse_options(&opts, argc, argv);
+
+	do_describe(repo, &opts);
+
+	return 0;
+}

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

@@ -0,0 +1,369 @@
+/*
+ * libgit2 "diff" example - shows how to use the diff API
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates the use of the libgit2 diff APIs to
+ * create `git_diff` objects and display them, emulating a number of
+ * core Git `diff` command line options.
+ *
+ * This covers on a portion of the core Git diff options and doesn't
+ * have particularly good error handling, but it should show most of
+ * the core libgit2 diff APIs, including various types of diffs and
+ * how to do renaming detection and patch formatting.
+ */
+
+static const char *colors[] = {
+	"\033[m", /* reset */
+	"\033[1m", /* bold */
+	"\033[31m", /* red */
+	"\033[32m", /* green */
+	"\033[36m" /* cyan */
+};
+
+enum {
+	OUTPUT_DIFF = (1 << 0),
+	OUTPUT_STAT = (1 << 1),
+	OUTPUT_SHORTSTAT = (1 << 2),
+	OUTPUT_NUMSTAT = (1 << 3),
+	OUTPUT_SUMMARY = (1 << 4)
+};
+
+enum {
+	CACHE_NORMAL = 0,
+	CACHE_ONLY = 1,
+	CACHE_NONE = 2
+};
+
+/** The 'diff_options' struct captures all the various parsed command line options. */
+struct diff_options {
+	git_diff_options diffopts;
+	git_diff_find_options findopts;
+	int color;
+	int no_index;
+	int cache;
+	int output;
+	git_diff_format_t format;
+	const char *treeish1;
+	const char *treeish2;
+	const char *dir;
+};
+
+/** These functions are implemented at the end */
+static void usage(const char *message, const char *arg);
+static void parse_opts(struct diff_options *o, int argc, char *argv[]);
+static int color_printer(
+	const git_diff_delta*, const git_diff_hunk*, const git_diff_line*, void*);
+static void diff_print_stats(git_diff *diff, struct diff_options *o);
+static void compute_diff_no_index(git_diff **diff, struct diff_options *o);
+
+int lg2_diff(git_repository *repo, int argc, char *argv[])
+{
+	git_tree *t1 = NULL, *t2 = NULL;
+	git_diff *diff;
+	struct diff_options o = {
+		GIT_DIFF_OPTIONS_INIT, GIT_DIFF_FIND_OPTIONS_INIT,
+		-1, -1, 0, 0, GIT_DIFF_FORMAT_PATCH, NULL, NULL, "."
+	};
+
+	parse_opts(&o, argc, argv);
+
+	/**
+	 * Possible argument patterns:
+	 *
+	 *  * &lt;sha1&gt; &lt;sha2&gt;
+	 *  * &lt;sha1&gt; --cached
+	 *  * &lt;sha1&gt;
+	 *  * --cached
+	 *  * --nocache (don't use index data in diff at all)
+	 *  * --no-index &lt;file1&gt; &lt;file2&gt;
+	 *  * nothing
+	 *
+	 * Currently ranged arguments like &lt;sha1&gt;..&lt;sha2&gt; and &lt;sha1&gt;...&lt;sha2&gt;
+	 * are not supported in this example
+	 */
+
+	if (o.no_index >= 0) {
+		compute_diff_no_index(&diff, &o);
+	} else {
+		if (o.treeish1)
+			treeish_to_tree(&t1, repo, o.treeish1);
+		if (o.treeish2)
+			treeish_to_tree(&t2, repo, o.treeish2);
+
+		if (t1 && t2)
+			check_lg2(
+				git_diff_tree_to_tree(&diff, repo, t1, t2, &o.diffopts),
+				"diff trees", NULL);
+		else if (o.cache != CACHE_NORMAL) {
+			if (!t1)
+				treeish_to_tree(&t1, repo, "HEAD");
+
+			if (o.cache == CACHE_NONE)
+				check_lg2(
+					git_diff_tree_to_workdir(&diff, repo, t1, &o.diffopts),
+					"diff tree to working directory", NULL);
+			else
+				check_lg2(
+					git_diff_tree_to_index(&diff, repo, t1, NULL, &o.diffopts),
+					"diff tree to index", NULL);
+		}
+		else if (t1)
+			check_lg2(
+				git_diff_tree_to_workdir_with_index(&diff, repo, t1, &o.diffopts),
+				"diff tree to working directory", NULL);
+		else
+			check_lg2(
+				git_diff_index_to_workdir(&diff, repo, NULL, &o.diffopts),
+				"diff index to working directory", NULL);
+
+		/** Apply rename and copy detection if requested. */
+
+		if ((o.findopts.flags & GIT_DIFF_FIND_ALL) != 0)
+			check_lg2(
+				git_diff_find_similar(diff, &o.findopts),
+				"finding renames and copies", NULL);
+	}
+
+	/** Generate simple output using libgit2 display helper. */
+
+	if (!o.output)
+		o.output = OUTPUT_DIFF;
+
+	if (o.output != OUTPUT_DIFF)
+		diff_print_stats(diff, &o);
+
+	if ((o.output & OUTPUT_DIFF) != 0) {
+		if (o.color >= 0)
+			fputs(colors[0], stdout);
+
+		check_lg2(
+			git_diff_print(diff, o.format, color_printer, &o.color),
+			"displaying diff", NULL);
+
+		if (o.color >= 0)
+			fputs(colors[0], stdout);
+	}
+
+	/** Cleanup before exiting. */
+	git_diff_free(diff);
+	git_tree_free(t1);
+	git_tree_free(t2);
+
+	return 0;
+}
+
+static void compute_diff_no_index(git_diff **diff, struct diff_options *o) {
+	git_patch *patch = NULL;
+	char *file1_str = NULL;
+	char *file2_str = NULL;
+	git_buf buf = {0};
+
+	if (!o->treeish1 || !o->treeish2) {
+		usage("two files should be provided as arguments", NULL);
+	}
+	file1_str = read_file(o->treeish1);
+	if (file1_str == NULL) {
+		usage("file cannot be read", o->treeish1);
+	}
+	file2_str = read_file(o->treeish2);
+	if (file2_str == NULL) {
+		usage("file cannot be read", o->treeish2);
+	}
+	check_lg2(
+		git_patch_from_buffers(&patch, file1_str, strlen(file1_str), o->treeish1, file2_str, strlen(file2_str), o->treeish2, &o->diffopts),
+		"patch buffers", NULL);
+	check_lg2(
+		git_patch_to_buf(&buf, patch),
+		"patch to buf", NULL);
+	check_lg2(
+		git_diff_from_buffer(diff, buf.ptr, buf.size),
+		"diff from patch", NULL);
+	git_patch_free(patch);
+	git_buf_dispose(&buf);
+	free(file1_str);
+	free(file2_str);
+}
+
+static void usage(const char *message, const char *arg)
+{
+	if (message && arg)
+		fprintf(stderr, "%s: %s\n", message, arg);
+	else if (message)
+		fprintf(stderr, "%s\n", message);
+	fprintf(stderr, "usage: diff [<tree-oid> [<tree-oid>]]\n");
+	exit(1);
+}
+
+/** This implements very rudimentary colorized output. */
+static int color_printer(
+	const git_diff_delta *delta,
+	const git_diff_hunk *hunk,
+	const git_diff_line *line,
+	void *data)
+{
+	int *last_color = data, color = 0;
+
+	(void)delta; (void)hunk;
+
+	if (*last_color >= 0) {
+		switch (line->origin) {
+		case GIT_DIFF_LINE_ADDITION:  color = 3; break;
+		case GIT_DIFF_LINE_DELETION:  color = 2; break;
+		case GIT_DIFF_LINE_ADD_EOFNL: color = 3; break;
+		case GIT_DIFF_LINE_DEL_EOFNL: color = 2; break;
+		case GIT_DIFF_LINE_FILE_HDR:  color = 1; break;
+		case GIT_DIFF_LINE_HUNK_HDR:  color = 4; break;
+		default: break;
+		}
+
+		if (color != *last_color) {
+			if (*last_color == 1 || color == 1)
+				fputs(colors[0], stdout);
+			fputs(colors[color], stdout);
+			*last_color = color;
+		}
+	}
+
+	return diff_output(delta, hunk, line, stdout);
+}
+
+/** Parse arguments as copied from git-diff. */
+static void parse_opts(struct diff_options *o, int argc, char *argv[])
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		const char *a = argv[args.pos];
+
+		if (a[0] != '-') {
+			if (o->treeish1 == NULL)
+				o->treeish1 = a;
+			else if (o->treeish2 == NULL)
+				o->treeish2 = a;
+			else
+				usage("Only one or two tree identifiers can be provided", NULL);
+		}
+		else if (!strcmp(a, "-p") || !strcmp(a, "-u") ||
+				 !strcmp(a, "--patch")) {
+			o->output |= OUTPUT_DIFF;
+			o->format = GIT_DIFF_FORMAT_PATCH;
+		}
+		else if (!strcmp(a, "--cached")) {
+			o->cache = CACHE_ONLY;
+			if (o->no_index >= 0) usage("--cached and --no-index are incompatible", NULL);
+		} else if (!strcmp(a, "--nocache"))
+			o->cache = CACHE_NONE;
+		else if (!strcmp(a, "--name-only") || !strcmp(a, "--format=name"))
+			o->format = GIT_DIFF_FORMAT_NAME_ONLY;
+		else if (!strcmp(a, "--name-status") ||
+				!strcmp(a, "--format=name-status"))
+			o->format = GIT_DIFF_FORMAT_NAME_STATUS;
+		else if (!strcmp(a, "--raw") || !strcmp(a, "--format=raw"))
+			o->format = GIT_DIFF_FORMAT_RAW;
+		else if (!strcmp(a, "--format=diff-index")) {
+			o->format = GIT_DIFF_FORMAT_RAW;
+			o->diffopts.id_abbrev = 40;
+		}
+		else if (!strcmp(a, "--no-index")) {
+			o->no_index = 0;
+			if (o->cache == CACHE_ONLY) usage("--cached and --no-index are incompatible", NULL);
+		} else if (!strcmp(a, "--color"))
+			o->color = 0;
+		else if (!strcmp(a, "--no-color"))
+			o->color = -1;
+		else if (!strcmp(a, "-R"))
+			o->diffopts.flags |= GIT_DIFF_REVERSE;
+		else if (!strcmp(a, "-a") || !strcmp(a, "--text"))
+			o->diffopts.flags |= GIT_DIFF_FORCE_TEXT;
+		else if (!strcmp(a, "--ignore-space-at-eol"))
+			o->diffopts.flags |= GIT_DIFF_IGNORE_WHITESPACE_EOL;
+		else if (!strcmp(a, "-b") || !strcmp(a, "--ignore-space-change"))
+			o->diffopts.flags |= GIT_DIFF_IGNORE_WHITESPACE_CHANGE;
+		else if (!strcmp(a, "-w") || !strcmp(a, "--ignore-all-space"))
+			o->diffopts.flags |= GIT_DIFF_IGNORE_WHITESPACE;
+		else if (!strcmp(a, "--ignored"))
+			o->diffopts.flags |= GIT_DIFF_INCLUDE_IGNORED;
+		else if (!strcmp(a, "--untracked"))
+			o->diffopts.flags |= GIT_DIFF_INCLUDE_UNTRACKED;
+		else if (!strcmp(a, "--patience"))
+			o->diffopts.flags |= GIT_DIFF_PATIENCE;
+		else if (!strcmp(a, "--minimal"))
+			o->diffopts.flags |= GIT_DIFF_MINIMAL;
+		else if (!strcmp(a, "--stat"))
+			o->output |= OUTPUT_STAT;
+		else if (!strcmp(a, "--numstat"))
+			o->output |= OUTPUT_NUMSTAT;
+		else if (!strcmp(a, "--shortstat"))
+			o->output |= OUTPUT_SHORTSTAT;
+		else if (!strcmp(a, "--summary"))
+			o->output |= OUTPUT_SUMMARY;
+		else if (match_uint16_arg(
+				&o->findopts.rename_threshold, &args, "-M") ||
+			match_uint16_arg(
+				&o->findopts.rename_threshold, &args, "--find-renames"))
+			o->findopts.flags |= GIT_DIFF_FIND_RENAMES;
+		else if (match_uint16_arg(
+				&o->findopts.copy_threshold, &args, "-C") ||
+			match_uint16_arg(
+				&o->findopts.copy_threshold, &args, "--find-copies"))
+			o->findopts.flags |= GIT_DIFF_FIND_COPIES;
+		else if (!strcmp(a, "--find-copies-harder"))
+			o->findopts.flags |= GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED;
+		else if (is_prefixed(a, "-B") || is_prefixed(a, "--break-rewrites"))
+			/* TODO: parse thresholds */
+			o->findopts.flags |= GIT_DIFF_FIND_REWRITES;
+		else if (!match_uint32_arg(
+				&o->diffopts.context_lines, &args, "-U") &&
+			!match_uint32_arg(
+				&o->diffopts.context_lines, &args, "--unified") &&
+			!match_uint32_arg(
+				&o->diffopts.interhunk_lines, &args, "--inter-hunk-context") &&
+			!match_uint16_arg(
+				&o->diffopts.id_abbrev, &args, "--abbrev") &&
+			!match_str_arg(&o->diffopts.old_prefix, &args, "--src-prefix") &&
+			!match_str_arg(&o->diffopts.new_prefix, &args, "--dst-prefix") &&
+			!match_str_arg(&o->dir, &args, "--git-dir"))
+			usage("Unknown command line argument", a);
+	}
+}
+
+/** Display diff output with "--stat", "--numstat", or "--shortstat" */
+static void diff_print_stats(git_diff *diff, struct diff_options *o)
+{
+	git_diff_stats *stats;
+	git_buf b = GIT_BUF_INIT_CONST(NULL, 0);
+	git_diff_stats_format_t format = 0;
+
+	check_lg2(
+		git_diff_get_stats(&stats, diff), "generating stats for diff", NULL);
+
+	if (o->output & OUTPUT_STAT)
+		format |= GIT_DIFF_STATS_FULL;
+	if (o->output & OUTPUT_SHORTSTAT)
+		format |= GIT_DIFF_STATS_SHORT;
+	if (o->output & OUTPUT_NUMSTAT)
+		format |= GIT_DIFF_STATS_NUMBER;
+	if (o->output & OUTPUT_SUMMARY)
+		format |= GIT_DIFF_STATS_INCLUDE_SUMMARY;
+
+	check_lg2(
+		git_diff_stats_to_buf(&b, stats, format, 80), "formatting stats", NULL);
+
+	fputs(b.ptr, stdout);
+
+	git_buf_dispose(&b);
+	git_diff_stats_free(stats);
+}

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

@@ -0,0 +1,109 @@
+#include "common.h"
+
+static int progress_cb(const char *str, int len, void *data)
+{
+	(void)data;
+	printf("remote: %.*s", len, str);
+	fflush(stdout); /* We don't have the \n to force the flush */
+	return 0;
+}
+
+/**
+ * This function gets called for each remote-tracking branch that gets
+ * updated. The message we output depends on whether it's a new one or
+ * an update.
+ */
+static int update_cb(const char *refname, const git_oid *a, const git_oid *b, void *data)
+{
+	char a_str[GIT_OID_HEXSZ+1], b_str[GIT_OID_HEXSZ+1];
+	(void)data;
+
+	git_oid_fmt(b_str, b);
+	b_str[GIT_OID_HEXSZ] = '\0';
+
+	if (git_oid_is_zero(a)) {
+		printf("[new]     %.20s %s\n", b_str, refname);
+	} else {
+		git_oid_fmt(a_str, a);
+		a_str[GIT_OID_HEXSZ] = '\0';
+		printf("[updated] %.10s..%.10s %s\n", a_str, b_str, refname);
+	}
+
+	return 0;
+}
+
+/**
+ * This gets called during the download and indexing. Here we show
+ * processed and total objects in the pack and the amount of received
+ * data. Most frontends will probably want to show a percentage and
+ * the download rate.
+ */
+static int transfer_progress_cb(const git_indexer_progress *stats, void *payload)
+{
+	(void)payload;
+
+	if (stats->received_objects == stats->total_objects) {
+		printf("Resolving deltas %u/%u\r",
+		       stats->indexed_deltas, stats->total_deltas);
+	} else if (stats->total_objects > 0) {
+		printf("Received %u/%u objects (%u) in %" PRIuZ " bytes\r",
+		       stats->received_objects, stats->total_objects,
+		       stats->indexed_objects, stats->received_bytes);
+	}
+	return 0;
+}
+
+/** Entry point for this command */
+int lg2_fetch(git_repository *repo, int argc, char **argv)
+{
+	git_remote *remote = NULL;
+	const git_indexer_progress *stats;
+	git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
+
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s fetch <repo>\n", argv[-1]);
+		return EXIT_FAILURE;
+	}
+
+	/* Figure out whether it's a named remote or a URL */
+	printf("Fetching %s for repo %p\n", argv[1], repo);
+	if (git_remote_lookup(&remote, repo, argv[1]) < 0)
+		if (git_remote_create_anonymous(&remote, repo, argv[1]) < 0)
+			goto on_error;
+
+	/* Set up the callbacks (only update_tips for now) */
+	fetch_opts.callbacks.update_tips = &update_cb;
+	fetch_opts.callbacks.sideband_progress = &progress_cb;
+	fetch_opts.callbacks.transfer_progress = transfer_progress_cb;
+	fetch_opts.callbacks.credentials = cred_acquire_cb;
+
+	/**
+	 * Perform the fetch with the configured refspecs from the
+	 * config. Update the reflog for the updated references with
+	 * "fetch".
+	 */
+	if (git_remote_fetch(remote, NULL, &fetch_opts, "fetch") < 0)
+		goto on_error;
+
+	/**
+	 * If there are local objects (we got a thin pack), then tell
+	 * the user how many objects we saved from having to cross the
+	 * network.
+	 */
+	stats = git_remote_stats(remote);
+	if (stats->local_objects > 0) {
+		printf("\rReceived %u/%u objects in %" PRIuZ " bytes (used %u local objects)\n",
+		       stats->indexed_objects, stats->total_objects, stats->received_bytes, stats->local_objects);
+	} else{
+		printf("\rReceived %u/%u objects in %" PRIuZ "bytes\n",
+			stats->indexed_objects, stats->total_objects, stats->received_bytes);
+	}
+
+	git_remote_free(remote);
+
+	return 0;
+
+ on_error:
+	git_remote_free(remote);
+	return -1;
+}

node_modules/nodegit/vendor/libgit2/examples/for-each-ref.c

@@ -0,0 +1,44 @@
+#include <git2.h>
+#include "common.h"
+
+static int show_ref(git_reference *ref, void *data)
+{
+	git_repository *repo = data;
+	git_reference *resolved = NULL;
+	char hex[GIT_OID_HEXSZ+1];
+	const git_oid *oid;
+	git_object *obj;
+	
+	if (git_reference_type(ref) == GIT_REFERENCE_SYMBOLIC)
+		check_lg2(git_reference_resolve(&resolved, ref),
+				  "Unable to resolve symbolic reference",
+				  git_reference_name(ref));
+	
+	oid = git_reference_target(resolved ? resolved : ref);
+	git_oid_fmt(hex, oid);
+	hex[GIT_OID_HEXSZ] = 0;
+	check_lg2(git_object_lookup(&obj, repo, oid, GIT_OBJECT_ANY),
+			  "Unable to lookup object", hex);
+	
+	printf("%s %-6s\t%s\n",
+		   hex,
+		   git_object_type2string(git_object_type(obj)),
+		   git_reference_name(ref));
+	
+	if (resolved)
+		git_reference_free(resolved);
+	return 0;
+}
+
+int lg2_for_each_ref(git_repository *repo, int argc, char **argv)
+{
+	UNUSED(argv);
+	
+	if (argc != 1)
+		fatal("Sorry, no for-each-ref options supported yet", NULL);
+	
+	check_lg2(git_reference_foreach(repo, show_ref, repo),
+			  "Could not iterate over references", NULL);
+	
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/examples/general.c

@@ -0,0 +1,774 @@
+/*
+ * libgit2 "general" example - shows basic libgit2 concepts
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+/**
+ * [**libgit2**][lg] is a portable, pure C implementation of the Git core
+ * methods provided as a re-entrant linkable library with a solid API,
+ * allowing you to write native speed custom Git applications in any
+ * language which supports C bindings.
+ *
+ * This file is an example of using that API in a real, compilable C file.
+ * As the API is updated, this file will be updated to demonstrate the new
+ * functionality.
+ *
+ * If you're trying to write something in C using [libgit2][lg], you should
+ * also check out the generated [API documentation][ap]. We try to link to
+ * the relevant sections of the API docs in each section in this file.
+ *
+ * **libgit2** (for the most part) only implements the core plumbing
+ * functions, not really the higher level porcelain stuff. For a primer on
+ * Git Internals that you will need to know to work with Git at this level,
+ * check out [Chapter 10][pg] of the Pro Git book.
+ *
+ * [lg]: http://libgit2.github.com
+ * [ap]: http://libgit2.github.com/libgit2
+ * [pg]: https://git-scm.com/book/en/v2/Git-Internals-Plumbing-and-Porcelain
+ */
+
+#include "common.h"
+
+/**
+ * ### Includes
+ *
+ * Including the `git2.h` header will include all the other libgit2 headers
+ * that you need.  It should be the only thing you need to include in order
+ * to compile properly and get all the libgit2 API.
+ */
+#include "git2.h"
+
+static void oid_parsing(git_oid *out);
+static void object_database(git_repository *repo, git_oid *oid);
+static void commit_writing(git_repository *repo);
+static void commit_parsing(git_repository *repo);
+static void tag_parsing(git_repository *repo);
+static void tree_parsing(git_repository *repo);
+static void blob_parsing(git_repository *repo);
+static void revwalking(git_repository *repo);
+static void index_walking(git_repository *repo);
+static void reference_listing(git_repository *repo);
+static void config_files(const char *repo_path, git_repository *repo);
+
+/**
+ * Almost all libgit2 functions return 0 on success or negative on error.
+ * This is not production quality error checking, but should be sufficient
+ * as an example.
+ */
+static void check_error(int error_code, const char *action)
+{
+	const git_error *error = git_error_last();
+	if (!error_code)
+		return;
+
+	printf("Error %d %s - %s\n", error_code, action,
+			(error && error->message) ? error->message : "???");
+
+	exit(1);
+}
+
+int lg2_general(git_repository *repo, int argc, char** argv)
+{
+	int error;
+	git_oid oid;
+	char *repo_path;
+
+	/**
+	 * Initialize the library, this will set up any global state which libgit2 needs
+	 * including threading and crypto
+	 */
+	git_libgit2_init();
+
+	/**
+	 * ### Opening the Repository
+	 *
+	 * There are a couple of methods for opening a repository, this being the
+	 * simplest.  There are also [methods][me] for specifying the index file
+	 * and work tree locations, here we assume they are in the normal places.
+	 *
+	 * (Try running this program against tests/resources/testrepo.git.)
+	 *
+	 * [me]: http://libgit2.github.com/libgit2/#HEAD/group/repository
+	 */
+	repo_path = (argc > 1) ? argv[1] : "/opt/libgit2-test/.git";
+
+	error = git_repository_open(&repo, repo_path);
+	check_error(error, "opening repository");
+
+	oid_parsing(&oid);
+	object_database(repo, &oid);
+	commit_writing(repo);
+	commit_parsing(repo);
+	tag_parsing(repo);
+	tree_parsing(repo);
+	blob_parsing(repo);
+	revwalking(repo);
+	index_walking(repo);
+	reference_listing(repo);
+	config_files(repo_path, repo);
+
+	/**
+	 * Finally, when you're done with the repository, you can free it as well.
+	 */
+	git_repository_free(repo);
+
+	return 0;
+}
+
+/**
+ * ### SHA-1 Value Conversions
+ */
+static void oid_parsing(git_oid *oid)
+{
+	char out[GIT_OID_HEXSZ+1];
+	char hex[] = "4a202b346bb0fb0db7eff3cffeb3c70babbd2045";
+
+	printf("*Hex to Raw*\n");
+
+	/**
+	 * For our first example, we will convert a 40 character hex value to the
+	 * 20 byte raw SHA1 value.
+	 *
+	 * The `git_oid` is the structure that keeps the SHA value. We will use
+	 * this throughout the example for storing the value of the current SHA
+	 * key we're working with.
+	 */
+	git_oid_fromstr(oid, hex);
+
+	/*
+	 * Once we've converted the string into the oid value, we can get the raw
+	 * value of the SHA by accessing `oid.id`
+	 *
+	 * Next we will convert the 20 byte raw SHA1 value to a human readable 40
+	 * char hex value.
+	 */
+	printf("\n*Raw to Hex*\n");
+	out[GIT_OID_HEXSZ] = '\0';
+
+	/**
+	 * If you have a oid, you can easily get the hex value of the SHA as well.
+	 */
+	git_oid_fmt(out, oid);
+
+	/**
+	 * If you have a oid, you can easily get the hex value of the SHA as well.
+	 */
+	git_oid_fmt(out, oid);
+	printf("SHA hex string: %s\n", out);
+}
+
+/**
+ * ### Working with the Object Database
+ *
+ * **libgit2** provides [direct access][odb] to the object database.  The
+ * object database is where the actual objects are stored in Git. For
+ * working with raw objects, we'll need to get this structure from the
+ * repository.
+ *
+ * [odb]: http://libgit2.github.com/libgit2/#HEAD/group/odb
+ */
+static void object_database(git_repository *repo, git_oid *oid)
+{
+	char oid_hex[GIT_OID_HEXSZ+1] = { 0 };
+	const unsigned char *data;
+	const char *str_type;
+	int error;
+	git_odb_object *obj;
+	git_odb *odb;
+	git_object_t otype;
+
+	git_repository_odb(&odb, repo);
+
+	/**
+	 * #### Raw Object Reading
+	 */
+
+	printf("\n*Raw Object Read*\n");
+
+	/**
+	 * We can read raw objects directly from the object database if we have
+	 * the oid (SHA) of the object.  This allows us to access objects without
+	 * knowing their type and inspect the raw bytes unparsed.
+	 */
+	error = git_odb_read(&obj, odb, oid);
+	check_error(error, "finding object in repository");
+
+	/**
+	 * A raw object only has three properties - the type (commit, blob, tree
+	 * or tag), the size of the raw data and the raw, unparsed data itself.
+	 * For a commit or tag, that raw data is human readable plain ASCII
+	 * text. For a blob it is just file contents, so it could be text or
+	 * binary data. For a tree it is a special binary format, so it's unlikely
+	 * to be hugely helpful as a raw object.
+	 */
+	data = (const unsigned char *)git_odb_object_data(obj);
+	otype = git_odb_object_type(obj);
+
+	/**
+	 * We provide methods to convert from the object type which is an enum, to
+	 * a string representation of that value (and vice-versa).
+	 */
+	str_type = git_object_type2string(otype);
+	printf("object length and type: %d, %s\nobject data: %s\n",
+			(int)git_odb_object_size(obj),
+			str_type, data);
+
+	/**
+	 * For proper memory management, close the object when you are done with
+	 * it or it will leak memory.
+	 */
+	git_odb_object_free(obj);
+
+	/**
+	 * #### Raw Object Writing
+	 */
+
+	printf("\n*Raw Object Write*\n");
+
+	/**
+	 * You can also write raw object data to Git. This is pretty cool because
+	 * it gives you direct access to the key/value properties of Git.  Here
+	 * we'll write a new blob object that just contains a simple string.
+	 * Notice that we have to specify the object type as the `git_otype` enum.
+	 */
+	git_odb_write(oid, odb, "test data", sizeof("test data") - 1, GIT_OBJECT_BLOB);
+
+	/**
+	 * Now that we've written the object, we can check out what SHA1 was
+	 * generated when the object was written to our database.
+	 */
+	git_oid_fmt(oid_hex, oid);
+	printf("Written Object: %s\n", oid_hex);
+
+	/**
+	 * Free the object database after usage.
+	 */
+	git_odb_free(odb);
+}
+
+/**
+ * #### Writing Commits
+ *
+ * libgit2 provides a couple of methods to create commit objects easily as
+ * well. There are four different create signatures, we'll just show one
+ * of them here.  You can read about the other ones in the [commit API
+ * docs][cd].
+ *
+ * [cd]: http://libgit2.github.com/libgit2/#HEAD/group/commit
+ */
+static void commit_writing(git_repository *repo)
+{
+	git_oid tree_id, parent_id, commit_id;
+	git_tree *tree;
+	git_commit *parent;
+	git_signature *author, *committer;
+	char oid_hex[GIT_OID_HEXSZ+1] = { 0 };
+
+	printf("\n*Commit Writing*\n");
+
+	/**
+	 * Creating signatures for an authoring identity and time is simple.  You
+	 * will need to do this to specify who created a commit and when.  Default
+	 * values for the name and email should be found in the `user.name` and
+	 * `user.email` configuration options.  See the `config` section of this
+	 * example file to see how to access config values.
+	 */
+	git_signature_new(&author,
+			"Scott Chacon", "schacon@gmail.com", 123456789, 60);
+	git_signature_new(&committer,
+			"Scott A Chacon", "scott@github.com", 987654321, 90);
+
+	/**
+	 * Commit objects need a tree to point to and optionally one or more
+	 * parents.  Here we're creating oid objects to create the commit with,
+	 * but you can also use
+	 */
+	git_oid_fromstr(&tree_id, "f60079018b664e4e79329a7ef9559c8d9e0378d1");
+	git_tree_lookup(&tree, repo, &tree_id);
+	git_oid_fromstr(&parent_id, "5b5b025afb0b4c913b4c338a42934a3863bf3644");
+	git_commit_lookup(&parent, repo, &parent_id);
+
+	/**
+	 * Here we actually create the commit object with a single call with all
+	 * the values we need to create the commit.  The SHA key is written to the
+	 * `commit_id` variable here.
+	 */
+	git_commit_create_v(
+			&commit_id, /* out id */
+			repo,
+			NULL, /* do not update the HEAD */
+			author,
+			committer,
+			NULL, /* use default message encoding */
+			"example commit",
+			tree,
+			1, parent);
+
+	/**
+	 * Now we can take a look at the commit SHA we've generated.
+	 */
+	git_oid_fmt(oid_hex, &commit_id);
+	printf("New Commit: %s\n", oid_hex);
+
+	/**
+	 * Free all objects used in the meanwhile.
+	 */
+	git_tree_free(tree);
+	git_commit_free(parent);
+	git_signature_free(author);
+	git_signature_free(committer);
+}
+
+/**
+ * ### Object Parsing
+ *
+ * libgit2 has methods to parse every object type in Git so you don't have
+ * to work directly with the raw data. This is much faster and simpler
+ * than trying to deal with the raw data yourself.
+ */
+
+/**
+ * #### Commit Parsing
+ *
+ * [Parsing commit objects][pco] is simple and gives you access to all the
+ * data in the commit - the author (name, email, datetime), committer
+ * (same), tree, message, encoding and parent(s).
+ *
+ * [pco]: http://libgit2.github.com/libgit2/#HEAD/group/commit
+ */
+static void commit_parsing(git_repository *repo)
+{
+	const git_signature *author, *cmtter;
+	git_commit *commit, *parent;
+	git_oid oid;
+	char oid_hex[GIT_OID_HEXSZ+1];
+	const char *message;
+	unsigned int parents, p;
+	int error;
+	time_t time;
+
+	printf("\n*Commit Parsing*\n");
+
+	git_oid_fromstr(&oid, "8496071c1b46c854b31185ea97743be6a8774479");
+
+	error = git_commit_lookup(&commit, repo, &oid);
+	check_error(error, "looking up commit");
+
+	/**
+	 * Each of the properties of the commit object are accessible via methods,
+	 * including commonly needed variations, such as `git_commit_time` which
+	 * returns the author time and `git_commit_message` which gives you the
+	 * commit message (as a NUL-terminated string).
+	 */
+	message  = git_commit_message(commit);
+	author   = git_commit_author(commit);
+	cmtter   = git_commit_committer(commit);
+	time    = git_commit_time(commit);
+
+	/**
+	 * The author and committer methods return [git_signature] structures,
+	 * which give you name, email and `when`, which is a `git_time` structure,
+	 * giving you a timestamp and timezone offset.
+	 */
+	printf("Author: %s (%s)\nCommitter: %s (%s)\nDate: %s\nMessage: %s\n",
+		author->name, author->email,
+		cmtter->name, cmtter->email,
+		ctime(&time), message);
+
+	/**
+	 * Commits can have zero or more parents. The first (root) commit will
+	 * have no parents, most commits will have one (i.e. the commit it was
+	 * based on) and merge commits will have two or more.  Commits can
+	 * technically have any number, though it's rare to have more than two.
+	 */
+	parents  = git_commit_parentcount(commit);
+	for (p = 0;p < parents;p++) {
+		memset(oid_hex, 0, sizeof(oid_hex));
+
+		git_commit_parent(&parent, commit, p);
+		git_oid_fmt(oid_hex, git_commit_id(parent));
+		printf("Parent: %s\n", oid_hex);
+		git_commit_free(parent);
+	}
+
+	git_commit_free(commit);
+}
+
+/**
+ * #### Tag Parsing
+ *
+ * You can parse and create tags with the [tag management API][tm], which
+ * functions very similarly to the commit lookup, parsing and creation
+ * methods, since the objects themselves are very similar.
+ *
+ * [tm]: http://libgit2.github.com/libgit2/#HEAD/group/tag
+ */
+static void tag_parsing(git_repository *repo)
+{
+	git_commit *commit;
+	git_object_t type;
+	git_tag *tag;
+	git_oid oid;
+	const char *name, *message;
+	int error;
+
+	printf("\n*Tag Parsing*\n");
+
+	/**
+	 * We create an oid for the tag object if we know the SHA and look it up
+	 * the same way that we would a commit (or any other object).
+	 */
+	git_oid_fromstr(&oid, "b25fa35b38051e4ae45d4222e795f9df2e43f1d1");
+
+	error = git_tag_lookup(&tag, repo, &oid);
+	check_error(error, "looking up tag");
+
+	/**
+	 * Now that we have the tag object, we can extract the information it
+	 * generally contains: the target (usually a commit object), the type of
+	 * the target object (usually 'commit'), the name ('v1.0'), the tagger (a
+	 * git_signature - name, email, timestamp), and the tag message.
+	 */
+	git_tag_target((git_object **)&commit, tag);
+	name = git_tag_name(tag);		/* "test" */
+	type = git_tag_target_type(tag);	/* GIT_OBJECT_COMMIT (object_t enum) */
+	message = git_tag_message(tag);		/* "tag message\n" */
+	printf("Tag Name: %s\nTag Type: %s\nTag Message: %s\n",
+		name, git_object_type2string(type), message);
+
+	/**
+	 * Free both the commit and tag after usage.
+	 */
+	git_commit_free(commit);
+	git_tag_free(tag);
+}
+
+/**
+ * #### Tree Parsing
+ *
+ * [Tree parsing][tp] is a bit different than the other objects, in that
+ * we have a subtype which is the tree entry.  This is not an actual
+ * object type in Git, but a useful structure for parsing and traversing
+ * tree entries.
+ *
+ * [tp]: http://libgit2.github.com/libgit2/#HEAD/group/tree
+ */
+static void tree_parsing(git_repository *repo)
+{
+	const git_tree_entry *entry;
+	size_t cnt;
+	git_object *obj;
+	git_tree *tree;
+	git_oid oid;
+
+	printf("\n*Tree Parsing*\n");
+
+	/**
+	 * Create the oid and lookup the tree object just like the other objects.
+	 */
+	git_oid_fromstr(&oid, "f60079018b664e4e79329a7ef9559c8d9e0378d1");
+	git_tree_lookup(&tree, repo, &oid);
+
+	/**
+	 * Getting the count of entries in the tree so you can iterate over them
+	 * if you want to.
+	 */
+	cnt = git_tree_entrycount(tree); /* 2 */
+	printf("tree entries: %d\n", (int) cnt);
+
+	entry = git_tree_entry_byindex(tree, 0);
+	printf("Entry name: %s\n", git_tree_entry_name(entry)); /* "README" */
+
+	/**
+	 * You can also access tree entries by name if you know the name of the
+	 * entry you're looking for.
+	 */
+	entry = git_tree_entry_byname(tree, "README");
+	git_tree_entry_name(entry); /* "README" */
+
+	/**
+	 * Once you have the entry object, you can access the content or subtree
+	 * (or commit, in the case of submodules) that it points to.  You can also
+	 * get the mode if you want.
+	 */
+	git_tree_entry_to_object(&obj, repo, entry); /* blob */
+
+	/**
+	 * Remember to close the looked-up object and tree once you are done using it
+	 */
+	git_object_free(obj);
+	git_tree_free(tree);
+}
+
+/**
+ * #### Blob Parsing
+ *
+ * The last object type is the simplest and requires the least parsing
+ * help. Blobs are just file contents and can contain anything, there is
+ * no structure to it. The main advantage to using the [simple blob
+ * api][ba] is that when you're creating blobs you don't have to calculate
+ * the size of the content.  There is also a helper for reading a file
+ * from disk and writing it to the db and getting the oid back so you
+ * don't have to do all those steps yourself.
+ *
+ * [ba]: http://libgit2.github.com/libgit2/#HEAD/group/blob
+ */
+static void blob_parsing(git_repository *repo)
+{
+	git_blob *blob;
+	git_oid oid;
+
+	printf("\n*Blob Parsing*\n");
+
+	git_oid_fromstr(&oid, "1385f264afb75a56a5bec74243be9b367ba4ca08");
+	git_blob_lookup(&blob, repo, &oid);
+
+	/**
+	 * You can access a buffer with the raw contents of the blob directly.
+	 * Note that this buffer may not be contain ASCII data for certain blobs
+	 * (e.g. binary files): do not consider the buffer a NULL-terminated
+	 * string, and use the `git_blob_rawsize` attribute to find out its exact
+	 * size in bytes
+	 * */
+	printf("Blob Size: %ld\n", (long)git_blob_rawsize(blob)); /* 8 */
+	git_blob_rawcontent(blob); /* "content" */
+
+	/**
+	 * Free the blob after usage.
+	 */
+	git_blob_free(blob);
+}
+
+/**
+ * ### Revwalking
+ *
+ * The libgit2 [revision walking api][rw] provides methods to traverse the
+ * directed graph created by the parent pointers of the commit objects.
+ * Since all commits point back to the commit that came directly before
+ * them, you can walk this parentage as a graph and find all the commits
+ * that were ancestors of (reachable from) a given starting point.  This
+ * can allow you to create `git log` type functionality.
+ *
+ * [rw]: http://libgit2.github.com/libgit2/#HEAD/group/revwalk
+ */
+static void revwalking(git_repository *repo)
+{
+	const git_signature *cauth;
+	const char *cmsg;
+	int error;
+	git_revwalk *walk;
+	git_commit *wcommit;
+	git_oid oid;
+
+	printf("\n*Revwalking*\n");
+
+	git_oid_fromstr(&oid, "5b5b025afb0b4c913b4c338a42934a3863bf3644");
+
+	/**
+	 * To use the revwalker, create a new walker, tell it how you want to sort
+	 * the output and then push one or more starting points onto the walker.
+	 * If you want to emulate the output of `git log` you would push the SHA
+	 * of the commit that HEAD points to into the walker and then start
+	 * traversing them.  You can also 'hide' commits that you want to stop at
+	 * or not see any of their ancestors.  So if you want to emulate `git log
+	 * branch1..branch2`, you would push the oid of `branch2` and hide the oid
+	 * of `branch1`.
+	 */
+	git_revwalk_new(&walk, repo);
+	git_revwalk_sorting(walk, GIT_SORT_TOPOLOGICAL | GIT_SORT_REVERSE);
+	git_revwalk_push(walk, &oid);
+
+	/**
+	 * Now that we have the starting point pushed onto the walker, we start
+	 * asking for ancestors. It will return them in the sorting order we asked
+	 * for as commit oids.  We can then lookup and parse the committed pointed
+	 * at by the returned OID; note that this operation is specially fast
+	 * since the raw contents of the commit object will be cached in memory
+	 */
+	while ((git_revwalk_next(&oid, walk)) == 0) {
+		error = git_commit_lookup(&wcommit, repo, &oid);
+		check_error(error, "looking up commit during revwalk");
+
+		cmsg  = git_commit_message(wcommit);
+		cauth = git_commit_author(wcommit);
+		printf("%s (%s)\n", cmsg, cauth->email);
+
+		git_commit_free(wcommit);
+	}
+
+	/**
+	 * Like the other objects, be sure to free the revwalker when you're done
+	 * to prevent memory leaks.  Also, make sure that the repository being
+	 * walked it not deallocated while the walk is in progress, or it will
+	 * result in undefined behavior
+	 */
+	git_revwalk_free(walk);
+}
+
+/**
+ * ### Index File Manipulation *
+ * The [index file API][gi] allows you to read, traverse, update and write
+ * the Git index file (sometimes thought of as the staging area).
+ *
+ * [gi]: http://libgit2.github.com/libgit2/#HEAD/group/index
+ */
+static void index_walking(git_repository *repo)
+{
+	git_index *index;
+	size_t i, ecount;
+
+	printf("\n*Index Walking*\n");
+
+	/**
+	 * You can either open the index from the standard location in an open
+	 * repository, as we're doing here, or you can open and manipulate any
+	 * index file with `git_index_open_bare()`. The index for the repository
+	 * will be located and loaded from disk.
+	 */
+	git_repository_index(&index, repo);
+
+	/**
+	 * For each entry in the index, you can get a bunch of information
+	 * including the SHA (oid), path and mode which map to the tree objects
+	 * that are written out.  It also has filesystem properties to help
+	 * determine what to inspect for changes (ctime, mtime, dev, ino, uid,
+	 * gid, file_size and flags) All these properties are exported publicly in
+	 * the `git_index_entry` struct
+	 */
+	ecount = git_index_entrycount(index);
+	for (i = 0; i < ecount; ++i) {
+		const git_index_entry *e = git_index_get_byindex(index, i);
+
+		printf("path: %s\n", e->path);
+		printf("mtime: %d\n", (int)e->mtime.seconds);
+		printf("fs: %d\n", (int)e->file_size);
+	}
+
+	git_index_free(index);
+}
+
+/**
+ * ### References
+ *
+ * The [reference API][ref] allows you to list, resolve, create and update
+ * references such as branches, tags and remote references (everything in
+ * the .git/refs directory).
+ *
+ * [ref]: http://libgit2.github.com/libgit2/#HEAD/group/reference
+ */
+static void reference_listing(git_repository *repo)
+{
+	git_strarray ref_list;
+	unsigned i;
+
+	printf("\n*Reference Listing*\n");
+
+	/**
+	 * Here we will implement something like `git for-each-ref` simply listing
+	 * out all available references and the object SHA they resolve to.
+	 *
+	 * Now that we have the list of reference names, we can lookup each ref
+	 * one at a time and resolve them to the SHA, then print both values out.
+	 */
+
+	git_reference_list(&ref_list, repo);
+
+	for (i = 0; i < ref_list.count; ++i) {
+		git_reference *ref;
+		char oid_hex[GIT_OID_HEXSZ+1] = GIT_OID_HEX_ZERO;
+		const char *refname;
+
+		refname = ref_list.strings[i];
+		git_reference_lookup(&ref, repo, refname);
+
+		switch (git_reference_type(ref)) {
+			case GIT_REFERENCE_DIRECT:
+				git_oid_fmt(oid_hex, git_reference_target(ref));
+				printf("%s [%s]\n", refname, oid_hex);
+				break;
+
+			case GIT_REFERENCE_SYMBOLIC:
+				printf("%s => %s\n", refname, git_reference_symbolic_target(ref));
+				break;
+			default:
+				fprintf(stderr, "Unexpected reference type\n");
+				exit(1);
+		}
+
+		git_reference_free(ref);
+	}
+
+	git_strarray_free(&ref_list);
+}
+
+/**
+ * ### Config Files
+ *
+ * The [config API][config] allows you to list and updatee config values
+ * in any of the accessible config file locations (system, global, local).
+ *
+ * [config]: http://libgit2.github.com/libgit2/#HEAD/group/config
+ */
+static void config_files(const char *repo_path, git_repository* repo)
+{
+	const char *email;
+	char config_path[256];
+	int32_t autocorrect;
+	git_config *cfg;
+	git_config *snap_cfg;
+	int error_code;
+
+	printf("\n*Config Listing*\n");
+
+	/**
+	 * Open a config object so we can read global values from it.
+	 */
+	sprintf(config_path, "%s/config", repo_path);
+	check_error(git_config_open_ondisk(&cfg, config_path), "opening config");
+
+	if (git_config_get_int32(&autocorrect, cfg, "help.autocorrect") == 0)
+		printf("Autocorrect: %d\n", autocorrect);
+
+	check_error(git_repository_config_snapshot(&snap_cfg, repo), "config snapshot");
+	git_config_get_string(&email, snap_cfg, "user.email");
+	printf("Email: %s\n", email);
+
+	error_code = git_config_get_int32(&autocorrect, cfg, "help.autocorrect");
+	switch (error_code)
+	{
+		case 0:
+			printf("Autocorrect: %d\n", autocorrect);
+			break;
+		case GIT_ENOTFOUND:
+			printf("Autocorrect: Undefined\n");
+			break;
+		default:
+			check_error(error_code, "get_int32 failed");
+	}
+	git_config_free(cfg);
+
+	check_error(git_repository_config_snapshot(&snap_cfg, repo), "config snapshot");
+	error_code = git_config_get_string(&email, snap_cfg, "user.email");
+	switch (error_code)
+	{
+		case 0:
+			printf("Email: %s\n", email);
+			break;
+		case GIT_ENOTFOUND:
+			printf("Email: Undefined\n");
+			break;
+		default:
+			check_error(error_code, "get_string failed");
+	}
+
+	git_config_free(snap_cfg);
+}

node_modules/nodegit/vendor/libgit2/examples/index-pack.c

@@ -0,0 +1,71 @@
+#include "common.h"
+
+/*
+ * This could be run in the main loop whilst the application waits for
+ * the indexing to finish in a worker thread
+ */
+static int index_cb(const git_indexer_progress *stats, void *data)
+{
+	(void)data;
+	printf("\rProcessing %u of %u", stats->indexed_objects, stats->total_objects);
+
+	return 0;
+}
+
+int lg2_index_pack(git_repository *repo, int argc, char **argv)
+{
+	git_indexer *idx;
+	git_indexer_progress stats = {0, 0};
+	int error;
+	char hash[GIT_OID_HEXSZ + 1] = {0};
+	int fd;
+	ssize_t read_bytes;
+	char buf[512];
+
+	(void)repo;
+
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s index-pack <packfile>\n", argv[-1]);
+		return EXIT_FAILURE;
+	}
+
+	if (git_indexer_new(&idx, ".", 0, NULL, NULL) < 0) {
+		puts("bad idx");
+		return -1;
+	}
+
+	if ((fd = open(argv[1], 0)) < 0) {
+		perror("open");
+		return -1;
+	}
+
+	do {
+		read_bytes = read(fd, buf, sizeof(buf));
+		if (read_bytes < 0)
+			break;
+
+		if ((error = git_indexer_append(idx, buf, read_bytes, &stats)) < 0)
+			goto cleanup;
+
+		index_cb(&stats, NULL);
+	} while (read_bytes > 0);
+
+	if (read_bytes < 0) {
+		error = -1;
+		perror("failed reading");
+		goto cleanup;
+	}
+
+	if ((error = git_indexer_commit(idx, &stats)) < 0)
+		goto cleanup;
+
+	printf("\rIndexing %u of %u\n", stats.indexed_objects, stats.total_objects);
+
+	git_oid_fmt(hash, git_indexer_hash(idx));
+	puts(hash);
+
+ cleanup:
+	close(fd);
+	git_indexer_free(idx);
+	return error;
+}

node_modules/nodegit/vendor/libgit2/examples/init.c

@@ -0,0 +1,248 @@
+/*
+ * libgit2 "init" example - shows how to initialize a new repo
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This is a sample program that is similar to "git init".  See the
+ * documentation for that (try "git help init") to understand what this
+ * program is emulating.
+ *
+ * This demonstrates using the libgit2 APIs to initialize a new repository.
+ *
+ * This also contains a special additional option that regular "git init"
+ * does not support which is "--initial-commit" to make a first empty commit.
+ * That is demonstrated in the "create_initial_commit" helper function.
+ */
+
+/** Forward declarations of helpers */
+struct init_opts {
+	int no_options;
+	int quiet;
+	int bare;
+	int initial_commit;
+	uint32_t shared;
+	const char *template;
+	const char *gitdir;
+	const char *dir;
+};
+static void create_initial_commit(git_repository *repo);
+static void parse_opts(struct init_opts *o, int argc, char *argv[]);
+
+int lg2_init(git_repository *repo, int argc, char *argv[])
+{
+	struct init_opts o = { 1, 0, 0, 0, GIT_REPOSITORY_INIT_SHARED_UMASK, 0, 0, 0 };
+
+	parse_opts(&o, argc, argv);
+
+	/* Initialize repository. */
+
+	if (o.no_options) {
+		/**
+		 * No options were specified, so let's demonstrate the default
+		 * simple case of git_repository_init() API usage...
+		 */
+		check_lg2(git_repository_init(&repo, o.dir, 0),
+			"Could not initialize repository", NULL);
+	}
+	else {
+		/**
+		 * Some command line options were specified, so we'll use the
+		 * extended init API to handle them
+		 */
+		git_repository_init_options initopts = GIT_REPOSITORY_INIT_OPTIONS_INIT;
+		initopts.flags = GIT_REPOSITORY_INIT_MKPATH;
+
+		if (o.bare)
+			initopts.flags |= GIT_REPOSITORY_INIT_BARE;
+
+		if (o.template) {
+			initopts.flags |= GIT_REPOSITORY_INIT_EXTERNAL_TEMPLATE;
+			initopts.template_path = o.template;
+		}
+
+		if (o.gitdir) {
+			/**
+			 * If you specified a separate git directory, then initialize
+			 * the repository at that path and use the second path as the
+			 * working directory of the repository (with a git-link file)
+			 */
+			initopts.workdir_path = o.dir;
+			o.dir = o.gitdir;
+		}
+
+		if (o.shared != 0)
+			initopts.mode = o.shared;
+
+		check_lg2(git_repository_init_ext(&repo, o.dir, &initopts),
+				"Could not initialize repository", NULL);
+	}
+
+	/** Print a message to stdout like "git init" does. */
+
+	if (!o.quiet) {
+		if (o.bare || o.gitdir)
+			o.dir = git_repository_path(repo);
+		else
+			o.dir = git_repository_workdir(repo);
+
+		printf("Initialized empty Git repository in %s\n", o.dir);
+	}
+
+	/**
+	 * As an extension to the basic "git init" command, this example
+	 * gives the option to create an empty initial commit.  This is
+	 * mostly to demonstrate what it takes to do that, but also some
+	 * people like to have that empty base commit in their repo.
+	 */
+	if (o.initial_commit) {
+		create_initial_commit(repo);
+		printf("Created empty initial commit\n");
+	}
+
+	git_repository_free(repo);
+
+	return 0;
+}
+
+/**
+ * Unlike regular "git init", this example shows how to create an initial
+ * empty commit in the repository.  This is the helper function that does
+ * that.
+ */
+static void create_initial_commit(git_repository *repo)
+{
+	git_signature *sig;
+	git_index *index;
+	git_oid tree_id, commit_id;
+	git_tree *tree;
+
+	/** First use the config to initialize a commit signature for the user. */
+
+	if (git_signature_default(&sig, repo) < 0)
+		fatal("Unable to create a commit signature.",
+		      "Perhaps 'user.name' and 'user.email' are not set");
+
+	/* Now let's create an empty tree for this commit */
+
+	if (git_repository_index(&index, repo) < 0)
+		fatal("Could not open repository index", NULL);
+
+	/**
+	 * Outside of this example, you could call git_index_add_bypath()
+	 * here to put actual files into the index.  For our purposes, we'll
+	 * leave it empty for now.
+	 */
+
+	if (git_index_write_tree(&tree_id, index) < 0)
+		fatal("Unable to write initial tree from index", NULL);
+
+	git_index_free(index);
+
+	if (git_tree_lookup(&tree, repo, &tree_id) < 0)
+		fatal("Could not look up initial tree", NULL);
+
+	/**
+	 * Ready to create the initial commit.
+	 *
+	 * Normally creating a commit would involve looking up the current
+	 * HEAD commit and making that be the parent of the initial commit,
+	 * but here this is the first commit so there will be no parent.
+	 */
+
+	if (git_commit_create_v(
+			&commit_id, repo, "HEAD", sig, sig,
+			NULL, "Initial commit", tree, 0) < 0)
+		fatal("Could not create the initial commit", NULL);
+
+	/** Clean up so we don't leak memory. */
+
+	git_tree_free(tree);
+	git_signature_free(sig);
+}
+
+static void usage(const char *error, const char *arg)
+{
+	fprintf(stderr, "error: %s '%s'\n", error, arg);
+	fprintf(stderr,
+			"usage: init [-q | --quiet] [--bare] [--template=<dir>]\n"
+			"            [--shared[=perms]] [--initial-commit]\n"
+			"            [--separate-git-dir] <directory>\n");
+	exit(1);
+}
+
+/** Parse the tail of the --shared= argument. */
+static uint32_t parse_shared(const char *shared)
+{
+	if (!strcmp(shared, "false") || !strcmp(shared, "umask"))
+		return GIT_REPOSITORY_INIT_SHARED_UMASK;
+
+	else if (!strcmp(shared, "true") || !strcmp(shared, "group"))
+		return GIT_REPOSITORY_INIT_SHARED_GROUP;
+
+	else if (!strcmp(shared, "all") || !strcmp(shared, "world") ||
+			 !strcmp(shared, "everybody"))
+		return GIT_REPOSITORY_INIT_SHARED_ALL;
+
+	else if (shared[0] == '0') {
+		long val;
+		char *end = NULL;
+		val = strtol(shared + 1, &end, 8);
+		if (end == shared + 1 || *end != 0)
+			usage("invalid octal value for --shared", shared);
+		return (uint32_t)val;
+	}
+
+	else
+		usage("unknown value for --shared", shared);
+
+	return 0;
+}
+
+static void parse_opts(struct init_opts *o, int argc, char *argv[])
+{
+	struct args_info args = ARGS_INFO_INIT;
+	const char *sharedarg;
+
+	/** Process arguments. */
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		char *a = argv[args.pos];
+
+		if (a[0] == '-')
+			o->no_options = 0;
+
+		if (a[0] != '-') {
+			if (o->dir != NULL)
+				usage("extra argument", a);
+			o->dir = a;
+		}
+		else if (!strcmp(a, "-q") || !strcmp(a, "--quiet"))
+			o->quiet = 1;
+		else if (!strcmp(a, "--bare"))
+			o->bare = 1;
+		else if (!strcmp(a, "--shared"))
+			o->shared = GIT_REPOSITORY_INIT_SHARED_GROUP;
+		else if (!strcmp(a, "--initial-commit"))
+			o->initial_commit = 1;
+		else if (match_str_arg(&sharedarg, &args, "--shared"))
+			o->shared = parse_shared(sharedarg);
+		else if (!match_str_arg(&o->template, &args, "--template") ||
+		         !match_str_arg(&o->gitdir, &args, "--separate-git-dir"))
+			usage("unknown option", a);
+	}
+
+	if (!o->dir)
+		usage("must specify directory to init", "");
+}

node_modules/nodegit/vendor/libgit2/examples/lg2.c

@@ -0,0 +1,122 @@
+#include "common.h"
+
+/* This part is not strictly libgit2-dependent, but you can use this
+ * as a starting point for a git-like tool */
+
+typedef int (*git_command_fn)(git_repository *, int , char **);
+
+struct {
+	char *name;
+	git_command_fn fn;
+	char requires_repo;
+} commands[] = {
+	{ "add",          lg2_add,          1 },
+	{ "blame",        lg2_blame,        1 },
+	{ "cat-file",     lg2_cat_file,     1 },
+	{ "checkout",     lg2_checkout,     1 },
+	{ "clone",        lg2_clone,        0 },
+	{ "config",       lg2_config,       1 },
+	{ "describe",     lg2_describe,     1 },
+	{ "diff",         lg2_diff,         1 },
+	{ "fetch",        lg2_fetch,        1 },
+	{ "for-each-ref", lg2_for_each_ref, 1 },
+	{ "general",      lg2_general,      0 },
+	{ "index-pack",   lg2_index_pack,   1 },
+	{ "init",         lg2_init,         0 },
+	{ "log",          lg2_log,          1 },
+	{ "ls-files",     lg2_ls_files,     1 },
+	{ "ls-remote",    lg2_ls_remote,    1 },
+	{ "merge",        lg2_merge,        1 },
+	{ "remote",       lg2_remote,       1 },
+	{ "rev-list",     lg2_rev_list,     1 },
+	{ "rev-parse",    lg2_rev_parse,    1 },
+	{ "show-index",   lg2_show_index,   0 },
+	{ "stash",        lg2_stash,        1 },
+	{ "status",       lg2_status,       1 },
+	{ "tag",          lg2_tag,          1 },
+};
+
+static int run_command(git_command_fn fn, git_repository *repo, struct args_info args)
+{
+	int error;
+
+	/* Run the command. If something goes wrong, print the error message to stderr */
+	error = fn(repo, args.argc - args.pos, &args.argv[args.pos]);
+	if (error < 0) {
+		if (git_error_last() == NULL)
+			fprintf(stderr, "Error without message");
+		else
+			fprintf(stderr, "Bad news:\n %s\n", git_error_last()->message);
+	}
+
+	return !!error;
+}
+
+static int usage(const char *prog)
+{
+	size_t i;
+
+	fprintf(stderr, "usage: %s <cmd>...\n\nAvailable commands:\n\n", prog);
+	for (i = 0; i < ARRAY_SIZE(commands); i++)
+		fprintf(stderr, "\t%s\n", commands[i].name);
+
+	exit(EXIT_FAILURE);
+}
+
+int main(int argc, char **argv)
+{
+	struct args_info args = ARGS_INFO_INIT;
+	git_repository *repo = NULL;
+	const char *git_dir = NULL;
+	int return_code = 1;
+	size_t i;
+
+	if (argc < 2)
+		usage(argv[0]);
+
+	git_libgit2_init();
+
+	for (args.pos = 1; args.pos < args.argc; ++args.pos) {
+		char *a = args.argv[args.pos];
+
+		if (a[0] != '-') {
+			/* non-arg */
+			break;
+		} else if (optional_str_arg(&git_dir, &args, "--git-dir", ".git")) {
+			continue;
+		} else if (match_arg_separator(&args)) {
+			break;
+		}
+	}
+
+	if (args.pos == args.argc)
+		usage(argv[0]);
+
+	if (!git_dir)
+		git_dir = ".";
+
+	for (i = 0; i < ARRAY_SIZE(commands); ++i) {
+		if (strcmp(args.argv[args.pos], commands[i].name))
+			continue;
+
+		/*
+		 * Before running the actual command, create an instance
+		 * of the local repository and pass it to the function.
+		 * */
+		if (commands[i].requires_repo) {
+			check_lg2(git_repository_open_ext(&repo, git_dir, 0, NULL),
+				  "Unable to open repository '%s'", git_dir);
+		}
+
+		return_code = run_command(commands[i].fn, repo, args);
+		goto shutdown;
+	}
+
+	fprintf(stderr, "Command not found: %s\n", argv[1]);
+
+shutdown:
+	git_repository_free(repo);
+	git_libgit2_shutdown();
+
+	return return_code;
+}

node_modules/nodegit/vendor/libgit2/examples/log.c

@@ -0,0 +1,474 @@
+/*
+ * libgit2 "log" example - shows how to walk history and get commit info
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates the libgit2 rev walker APIs to roughly
+ * simulate the output of `git log` and a few of command line arguments.
+ * `git log` has many many options and this only shows a few of them.
+ *
+ * This does not have:
+ *
+ * - Robust error handling
+ * - Colorized or paginated output formatting
+ * - Most of the `git log` options
+ *
+ * This does have:
+ *
+ * - Examples of translating command line arguments to equivalent libgit2
+ *   revwalker configuration calls
+ * - Simplified options to apply pathspec limits and to show basic diffs
+ */
+
+/** log_state represents walker being configured while handling options */
+struct log_state {
+	git_repository *repo;
+	const char *repodir;
+	git_revwalk *walker;
+	int hide;
+	int sorting;
+	int revisions;
+};
+
+/** utility functions that are called to configure the walker */
+static void set_sorting(struct log_state *s, unsigned int sort_mode);
+static void push_rev(struct log_state *s, git_object *obj, int hide);
+static int add_revision(struct log_state *s, const char *revstr);
+
+/** log_options holds other command line options that affect log output */
+struct log_options {
+	int show_diff;
+	int show_log_size;
+	int skip, limit;
+	int min_parents, max_parents;
+	git_time_t before;
+	git_time_t after;
+	const char *author;
+	const char *committer;
+	const char *grep;
+};
+
+/** utility functions that parse options and help with log output */
+static int parse_options(
+	struct log_state *s, struct log_options *opt, int argc, char **argv);
+static void print_time(const git_time *intime, const char *prefix);
+static void print_commit(git_commit *commit, struct log_options *opts);
+static int match_with_parent(git_commit *commit, int i, git_diff_options *);
+
+/** utility functions for filtering */
+static int signature_matches(const git_signature *sig, const char *filter);
+static int log_message_matches(const git_commit *commit, const char *filter);
+
+int lg2_log(git_repository *repo, int argc, char *argv[])
+{
+	int i, count = 0, printed = 0, parents, last_arg;
+	struct log_state s;
+	struct log_options opt;
+	git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
+	git_oid oid;
+	git_commit *commit = NULL;
+	git_pathspec *ps = NULL;
+
+	/** Parse arguments and set up revwalker. */
+	last_arg = parse_options(&s, &opt, argc, argv);
+	s.repo = repo;
+
+	diffopts.pathspec.strings = &argv[last_arg];
+	diffopts.pathspec.count	  = argc - last_arg;
+	if (diffopts.pathspec.count > 0)
+		check_lg2(git_pathspec_new(&ps, &diffopts.pathspec),
+			"Building pathspec", NULL);
+
+	if (!s.revisions)
+		add_revision(&s, NULL);
+
+	/** Use the revwalker to traverse the history. */
+
+	printed = count = 0;
+
+	for (; !git_revwalk_next(&oid, s.walker); git_commit_free(commit)) {
+		check_lg2(git_commit_lookup(&commit, s.repo, &oid),
+			"Failed to look up commit", NULL);
+
+		parents = (int)git_commit_parentcount(commit);
+		if (parents < opt.min_parents)
+			continue;
+		if (opt.max_parents > 0 && parents > opt.max_parents)
+			continue;
+
+		if (diffopts.pathspec.count > 0) {
+			int unmatched = parents;
+
+			if (parents == 0) {
+				git_tree *tree;
+				check_lg2(git_commit_tree(&tree, commit), "Get tree", NULL);
+				if (git_pathspec_match_tree(
+						NULL, tree, GIT_PATHSPEC_NO_MATCH_ERROR, ps) != 0)
+					unmatched = 1;
+				git_tree_free(tree);
+			} else if (parents == 1) {
+				unmatched = match_with_parent(commit, 0, &diffopts) ? 0 : 1;
+			} else {
+				for (i = 0; i < parents; ++i) {
+					if (match_with_parent(commit, i, &diffopts))
+						unmatched--;
+				}
+			}
+
+			if (unmatched > 0)
+				continue;
+		}
+
+		if (!signature_matches(git_commit_author(commit), opt.author))
+			continue;
+
+		if (!signature_matches(git_commit_committer(commit), opt.committer))
+			continue;
+
+		if (!log_message_matches(commit, opt.grep))
+			continue;
+
+		if (count++ < opt.skip)
+			continue;
+		if (opt.limit != -1 && printed++ >= opt.limit) {
+			git_commit_free(commit);
+			break;
+		}
+
+		print_commit(commit, &opt);
+
+		if (opt.show_diff) {
+			git_tree *a = NULL, *b = NULL;
+			git_diff *diff = NULL;
+
+			if (parents > 1)
+				continue;
+			check_lg2(git_commit_tree(&b, commit), "Get tree", NULL);
+			if (parents == 1) {
+				git_commit *parent;
+				check_lg2(git_commit_parent(&parent, commit, 0), "Get parent", NULL);
+				check_lg2(git_commit_tree(&a, parent), "Tree for parent", NULL);
+				git_commit_free(parent);
+			}
+
+			check_lg2(git_diff_tree_to_tree(
+				&diff, git_commit_owner(commit), a, b, &diffopts),
+				"Diff commit with parent", NULL);
+			check_lg2(
+                git_diff_print(diff, GIT_DIFF_FORMAT_PATCH, diff_output, NULL),
+				"Displaying diff", NULL);
+
+			git_diff_free(diff);
+			git_tree_free(a);
+			git_tree_free(b);
+		}
+	}
+
+	git_pathspec_free(ps);
+	git_revwalk_free(s.walker);
+
+	return 0;
+}
+
+/** Determine if the given git_signature does not contain the filter text. */
+static int signature_matches(const git_signature *sig, const char *filter) {
+	if (filter == NULL)
+		return 1;
+
+	if (sig != NULL &&
+		(strstr(sig->name, filter) != NULL ||
+		strstr(sig->email, filter) != NULL))
+		return 1;
+
+	return 0;
+}
+
+static int log_message_matches(const git_commit *commit, const char *filter) {
+	const char *message = NULL;
+
+	if (filter == NULL)
+		return 1;
+
+	if ((message = git_commit_message(commit)) != NULL &&
+		strstr(message, filter) != NULL)
+		return 1;
+
+	return 0;
+}
+
+/** Push object (for hide or show) onto revwalker. */
+static void push_rev(struct log_state *s, git_object *obj, int hide)
+{
+	hide = s->hide ^ hide;
+
+	/** Create revwalker on demand if it doesn't already exist. */
+	if (!s->walker) {
+		check_lg2(git_revwalk_new(&s->walker, s->repo),
+			"Could not create revision walker", NULL);
+		git_revwalk_sorting(s->walker, s->sorting);
+	}
+
+	if (!obj)
+		check_lg2(git_revwalk_push_head(s->walker),
+			"Could not find repository HEAD", NULL);
+	else if (hide)
+		check_lg2(git_revwalk_hide(s->walker, git_object_id(obj)),
+			"Reference does not refer to a commit", NULL);
+	else
+		check_lg2(git_revwalk_push(s->walker, git_object_id(obj)),
+			"Reference does not refer to a commit", NULL);
+
+	git_object_free(obj);
+}
+
+/** Parse revision string and add revs to walker. */
+static int add_revision(struct log_state *s, const char *revstr)
+{
+	git_revspec revs;
+	int hide = 0;
+
+	if (!revstr) {
+		push_rev(s, NULL, hide);
+		return 0;
+	}
+
+	if (*revstr == '^') {
+		revs.flags = GIT_REVPARSE_SINGLE;
+		hide = !hide;
+
+		if (git_revparse_single(&revs.from, s->repo, revstr + 1) < 0)
+			return -1;
+	} else if (git_revparse(&revs, s->repo, revstr) < 0)
+		return -1;
+
+	if ((revs.flags & GIT_REVPARSE_SINGLE) != 0)
+		push_rev(s, revs.from, hide);
+	else {
+		push_rev(s, revs.to, hide);
+
+		if ((revs.flags & GIT_REVPARSE_MERGE_BASE) != 0) {
+			git_oid base;
+			check_lg2(git_merge_base(&base, s->repo,
+				git_object_id(revs.from), git_object_id(revs.to)),
+				"Could not find merge base", revstr);
+			check_lg2(
+				git_object_lookup(&revs.to, s->repo, &base, GIT_OBJECT_COMMIT),
+				"Could not find merge base commit", NULL);
+
+			push_rev(s, revs.to, hide);
+		}
+
+		push_rev(s, revs.from, !hide);
+	}
+
+	return 0;
+}
+
+/** Update revwalker with sorting mode. */
+static void set_sorting(struct log_state *s, unsigned int sort_mode)
+{
+	/** Open repo on demand if it isn't already open. */
+	if (!s->repo) {
+		if (!s->repodir) s->repodir = ".";
+		check_lg2(git_repository_open_ext(&s->repo, s->repodir, 0, NULL),
+			"Could not open repository", s->repodir);
+	}
+
+	/** Create revwalker on demand if it doesn't already exist. */
+	if (!s->walker)
+		check_lg2(git_revwalk_new(&s->walker, s->repo),
+			"Could not create revision walker", NULL);
+
+	if (sort_mode == GIT_SORT_REVERSE)
+		s->sorting = s->sorting ^ GIT_SORT_REVERSE;
+	else
+		s->sorting = sort_mode | (s->sorting & GIT_SORT_REVERSE);
+
+	git_revwalk_sorting(s->walker, s->sorting);
+}
+
+/** Helper to format a git_time value like Git. */
+static void print_time(const git_time *intime, const char *prefix)
+{
+	char sign, out[32];
+	struct tm *intm;
+	int offset, hours, minutes;
+	time_t t;
+
+	offset = intime->offset;
+	if (offset < 0) {
+		sign = '-';
+		offset = -offset;
+	} else {
+		sign = '+';
+	}
+
+	hours   = offset / 60;
+	minutes = offset % 60;
+
+	t = (time_t)intime->time + (intime->offset * 60);
+
+	intm = gmtime(&t);
+	strftime(out, sizeof(out), "%a %b %e %T %Y", intm);
+
+	printf("%s%s %c%02d%02d\n", prefix, out, sign, hours, minutes);
+}
+
+/** Helper to print a commit object. */
+static void print_commit(git_commit *commit, struct log_options *opts)
+{
+	char buf[GIT_OID_HEXSZ + 1];
+	int i, count;
+	const git_signature *sig;
+	const char *scan, *eol;
+
+	git_oid_tostr(buf, sizeof(buf), git_commit_id(commit));
+	printf("commit %s\n", buf);
+
+	if (opts->show_log_size) {
+		printf("log size %d\n", (int)strlen(git_commit_message(commit)));
+	}
+
+	if ((count = (int)git_commit_parentcount(commit)) > 1) {
+		printf("Merge:");
+		for (i = 0; i < count; ++i) {
+			git_oid_tostr(buf, 8, git_commit_parent_id(commit, i));
+			printf(" %s", buf);
+		}
+		printf("\n");
+	}
+
+	if ((sig = git_commit_author(commit)) != NULL) {
+		printf("Author: %s <%s>\n", sig->name, sig->email);
+		print_time(&sig->when, "Date:   ");
+	}
+	printf("\n");
+
+	for (scan = git_commit_message(commit); scan && *scan; ) {
+		for (eol = scan; *eol && *eol != '\n'; ++eol) /* find eol */;
+
+		printf("    %.*s\n", (int)(eol - scan), scan);
+		scan = *eol ? eol + 1 : NULL;
+	}
+	printf("\n");
+}
+
+/** Helper to find how many files in a commit changed from its nth parent. */
+static int match_with_parent(git_commit *commit, int i, git_diff_options *opts)
+{
+	git_commit *parent;
+	git_tree *a, *b;
+	git_diff *diff;
+	int ndeltas;
+
+	check_lg2(
+		git_commit_parent(&parent, commit, (size_t)i), "Get parent", NULL);
+	check_lg2(git_commit_tree(&a, parent), "Tree for parent", NULL);
+	check_lg2(git_commit_tree(&b, commit), "Tree for commit", NULL);
+	check_lg2(
+		git_diff_tree_to_tree(&diff, git_commit_owner(commit), a, b, opts),
+		"Checking diff between parent and commit", NULL);
+
+	ndeltas = (int)git_diff_num_deltas(diff);
+
+	git_diff_free(diff);
+	git_tree_free(a);
+	git_tree_free(b);
+	git_commit_free(parent);
+
+	return ndeltas > 0;
+}
+
+/** Print a usage message for the program. */
+static void usage(const char *message, const char *arg)
+{
+	if (message && arg)
+		fprintf(stderr, "%s: %s\n", message, arg);
+	else if (message)
+		fprintf(stderr, "%s\n", message);
+	fprintf(stderr, "usage: log [<options>]\n");
+	exit(1);
+}
+
+/** Parse some log command line options. */
+static int parse_options(
+	struct log_state *s, struct log_options *opt, int argc, char **argv)
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	memset(s, 0, sizeof(*s));
+	s->sorting = GIT_SORT_TIME;
+
+	memset(opt, 0, sizeof(*opt));
+	opt->max_parents = -1;
+	opt->limit = -1;
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		const char *a = argv[args.pos];
+
+		if (a[0] != '-') {
+			if (!add_revision(s, a))
+				s->revisions++;
+			else
+				/** Try failed revision parse as filename. */
+				break;
+		} else if (!match_arg_separator(&args)) {
+			break;
+		}
+		else if (!strcmp(a, "--date-order"))
+			set_sorting(s, GIT_SORT_TIME);
+		else if (!strcmp(a, "--topo-order"))
+			set_sorting(s, GIT_SORT_TOPOLOGICAL);
+		else if (!strcmp(a, "--reverse"))
+			set_sorting(s, GIT_SORT_REVERSE);
+		else if (match_str_arg(&opt->author, &args, "--author"))
+			/** Found valid --author */;
+		else if (match_str_arg(&opt->committer, &args, "--committer"))
+			/** Found valid --committer */;
+		else if (match_str_arg(&opt->grep, &args, "--grep"))
+			/** Found valid --grep */;
+		else if (match_str_arg(&s->repodir, &args, "--git-dir"))
+			/** Found git-dir. */;
+		else if (match_int_arg(&opt->skip, &args, "--skip", 0))
+			/** Found valid --skip. */;
+		else if (match_int_arg(&opt->limit, &args, "--max-count", 0))
+			/** Found valid --max-count. */;
+		else if (a[1] >= '0' && a[1] <= '9')
+			is_integer(&opt->limit, a + 1, 0);
+		else if (match_int_arg(&opt->limit, &args, "-n", 0))
+			/** Found valid -n. */;
+		else if (!strcmp(a, "--merges"))
+			opt->min_parents = 2;
+		else if (!strcmp(a, "--no-merges"))
+			opt->max_parents = 1;
+		else if (!strcmp(a, "--no-min-parents"))
+			opt->min_parents = 0;
+		else if (!strcmp(a, "--no-max-parents"))
+			opt->max_parents = -1;
+		else if (match_int_arg(&opt->max_parents, &args, "--max-parents=", 1))
+			/** Found valid --max-parents. */;
+		else if (match_int_arg(&opt->min_parents, &args, "--min-parents=", 0))
+			/** Found valid --min_parents. */;
+		else if (!strcmp(a, "-p") || !strcmp(a, "-u") || !strcmp(a, "--patch"))
+			opt->show_diff = 1;
+		else if (!strcmp(a, "--log-size"))
+			opt->show_log_size = 1;
+		else
+			usage("Unsupported argument", a);
+	}
+
+	return args.pos;
+}
+

node_modules/nodegit/vendor/libgit2/examples/ls-files.c

@@ -0,0 +1,131 @@
+/*
+ * libgit2 "ls-files" example - shows how to view all files currently in the index
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates the libgit2 index APIs to roughly
+ * simulate the output of `git ls-files`.
+ * `git ls-files` has many options and this currently does not show them.
+ *
+ * `git ls-files` base command shows all paths in the index at that time.
+ * This includes staged and committed files, but unstaged files will not display.
+ *
+ * This currently supports the default behavior and the `--error-unmatch` option.
+ */
+
+struct ls_options {
+	int error_unmatch;
+	char *files[1024];
+	size_t file_count;
+};
+
+static void usage(const char *message, const char *arg)
+{
+	if (message && arg)
+		fprintf(stderr, "%s: %s\n", message, arg);
+	else if (message)
+		fprintf(stderr, "%s\n", message);
+	fprintf(stderr, "usage: ls-files [--error-unmatch] [--] [<file>...]\n");
+	exit(1);
+}
+
+static int parse_options(struct ls_options *opts, int argc, char *argv[])
+{
+	int parsing_files = 0;
+	int i;
+
+	memset(opts, 0, sizeof(struct ls_options));
+
+	if (argc < 2)
+		return 0;
+
+	for (i = 1; i < argc; ++i) {
+		char *a = argv[i];
+
+		/* if it doesn't start with a '-' or is after the '--' then it is a file */
+		if (a[0] != '-' || parsing_files) {
+			parsing_files = 1;
+
+			/* watch for overflows (just in case) */
+			if (opts->file_count == 1024) {
+				fprintf(stderr, "ls-files can only support 1024 files at this time.\n");
+				return -1;
+			}
+
+			opts->files[opts->file_count++] = a;
+		} else if (!strcmp(a, "--")) {
+			parsing_files = 1;
+		} else if (!strcmp(a, "--error-unmatch")) {
+			opts->error_unmatch = 1;
+		} else {
+			usage("Unsupported argument", a);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static int print_paths(struct ls_options *opts, git_index *index)
+{
+	size_t i;
+	const git_index_entry *entry;
+
+	/* if there are no files explicitly listed by the user print all entries in the index */
+	if (opts->file_count == 0) {
+		size_t entry_count = git_index_entrycount(index);
+
+		for (i = 0; i < entry_count; i++) {
+			entry = git_index_get_byindex(index, i);
+			puts(entry->path);
+		}
+		return 0;
+	}
+
+	/* loop through the files found in the args and print them if they exist */
+	for (i = 0; i < opts->file_count; ++i) {
+		const char *path = opts->files[i];
+
+		if ((entry = git_index_get_bypath(index, path, GIT_INDEX_STAGE_NORMAL)) != NULL) {
+			puts(path);
+		} else if (opts->error_unmatch) {
+			fprintf(stderr, "error: pathspec '%s' did not match any file(s) known to git.\n", path);
+			fprintf(stderr, "Did you forget to 'git add'?\n");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+int lg2_ls_files(git_repository *repo, int argc, char *argv[])
+{
+	git_index *index = NULL;
+	struct ls_options opts;
+	int error;
+
+	if ((error = parse_options(&opts, argc, argv)) < 0)
+		return error;
+
+	if ((error = git_repository_index(&index, repo)) < 0)
+		goto cleanup;
+
+	error = print_paths(&opts, index);
+
+cleanup:
+	git_index_free(index);
+
+	return error;
+}

node_modules/nodegit/vendor/libgit2/examples/ls-remote.c

@@ -0,0 +1,60 @@
+#include "common.h"
+
+static int use_remote(git_repository *repo, char *name)
+{
+	git_remote *remote = NULL;
+	int error;
+	const git_remote_head **refs;
+	size_t refs_len, i;
+	git_remote_callbacks callbacks = GIT_REMOTE_CALLBACKS_INIT;
+
+	/* Find the remote by name */
+	error = git_remote_lookup(&remote, repo, name);
+	if (error < 0) {
+		error = git_remote_create_anonymous(&remote, repo, name);
+		if (error < 0)
+			goto cleanup;
+	}
+
+	/**
+	 * Connect to the remote and call the printing function for
+	 * each of the remote references.
+	 */
+	callbacks.credentials = cred_acquire_cb;
+
+	error = git_remote_connect(remote, GIT_DIRECTION_FETCH, &callbacks, NULL, NULL);
+	if (error < 0)
+		goto cleanup;
+
+	/**
+	 * Get the list of references on the remote and print out
+	 * their name next to what they point to.
+	 */
+	if (git_remote_ls(&refs, &refs_len, remote) < 0)
+		goto cleanup;
+
+	for (i = 0; i < refs_len; i++) {
+		char oid[GIT_OID_HEXSZ + 1] = {0};
+		git_oid_fmt(oid, &refs[i]->oid);
+		printf("%s\t%s\n", oid, refs[i]->name);
+	}
+
+cleanup:
+	git_remote_free(remote);
+	return error;
+}
+
+/** Entry point for this command */
+int lg2_ls_remote(git_repository *repo, int argc, char **argv)
+{
+	int error;
+
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s ls-remote <remote>\n", argv[-1]);
+		return EXIT_FAILURE;
+	}
+
+	error = use_remote(repo, argv[1]);
+
+	return error;
+}

node_modules/nodegit/vendor/libgit2/examples/merge.c

@@ -0,0 +1,361 @@
+/*
+ * libgit2 "merge" example - shows how to perform merges
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/** The following example demonstrates how to do merges with libgit2.
+ *
+ * It will merge whatever commit-ish you pass in into the current branch.
+ *
+ * Recognized options are :
+ *  --no-commit: don't actually commit the merge.
+ *
+ */
+
+struct merge_options {
+	const char **heads;
+	size_t heads_count;
+
+	git_annotated_commit **annotated;
+	size_t annotated_count;
+
+	int no_commit : 1;
+};
+
+static void print_usage(void)
+{
+	fprintf(stderr, "usage: merge [--no-commit] <commit...>\n");
+	exit(1);
+}
+
+static void merge_options_init(struct merge_options *opts)
+{
+	memset(opts, 0, sizeof(*opts));
+
+	opts->heads = NULL;
+	opts->heads_count = 0;
+	opts->annotated = NULL;
+	opts->annotated_count = 0;
+}
+
+static void opts_add_refish(struct merge_options *opts, const char *refish)
+{
+	size_t sz;
+
+	assert(opts != NULL);
+
+	sz = ++opts->heads_count * sizeof(opts->heads[0]);
+	opts->heads = xrealloc((void *) opts->heads, sz);
+	opts->heads[opts->heads_count - 1] = refish;
+}
+
+static void parse_options(const char **repo_path, struct merge_options *opts, int argc, char **argv)
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	if (argc <= 1)
+		print_usage();
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		const char *curr = argv[args.pos];
+
+		if (curr[0] != '-') {
+			opts_add_refish(opts, curr);
+		} else if (!strcmp(curr, "--no-commit")) {
+			opts->no_commit = 1;
+		} else if (match_str_arg(repo_path, &args, "--git-dir")) {
+			continue;
+		} else {
+			print_usage();
+		}
+	}
+}
+
+static int resolve_heads(git_repository *repo, struct merge_options *opts)
+{
+	git_annotated_commit **annotated = calloc(opts->heads_count, sizeof(git_annotated_commit *));
+	size_t annotated_count = 0, i;
+	int err = 0;
+
+	for (i = 0; i < opts->heads_count; i++) {
+		err = resolve_refish(&annotated[annotated_count++], repo, opts->heads[i]);
+		if (err != 0) {
+			fprintf(stderr, "failed to resolve refish %s: %s\n", opts->heads[i], git_error_last()->message);
+			annotated_count--;
+			continue;
+		}
+	}
+
+	if (annotated_count != opts->heads_count) {
+		fprintf(stderr, "unable to parse some refish\n");
+		free(annotated);
+		return -1;
+	}
+
+	opts->annotated = annotated;
+	opts->annotated_count = annotated_count;
+	return 0;
+}
+
+static int perform_fastforward(git_repository *repo, const git_oid *target_oid, int is_unborn)
+{
+	git_checkout_options ff_checkout_options = GIT_CHECKOUT_OPTIONS_INIT;
+	git_reference *target_ref;
+	git_reference *new_target_ref;
+	git_object *target = NULL;
+	int err = 0;
+
+	if (is_unborn) {
+		const char *symbolic_ref;
+		git_reference *head_ref;
+
+		/* HEAD reference is unborn, lookup manually so we don't try to resolve it */
+		err = git_reference_lookup(&head_ref, repo, "HEAD");
+		if (err != 0) {
+			fprintf(stderr, "failed to lookup HEAD ref\n");
+			return -1;
+		}
+
+		/* Grab the reference HEAD should be pointing to */
+		symbolic_ref = git_reference_symbolic_target(head_ref);
+
+		/* Create our master reference on the target OID */
+		err = git_reference_create(&target_ref, repo, symbolic_ref, target_oid, 0, NULL);
+		if (err != 0) {
+			fprintf(stderr, "failed to create master reference\n");
+			return -1;
+		}
+
+		git_reference_free(head_ref);
+	} else {
+		/* HEAD exists, just lookup and resolve */
+		err = git_repository_head(&target_ref, repo);
+		if (err != 0) {
+			fprintf(stderr, "failed to get HEAD reference\n");
+			return -1;
+		}
+	}
+
+	/* Lookup the target object */
+	err = git_object_lookup(&target, repo, target_oid, GIT_OBJECT_COMMIT);
+	if (err != 0) {
+		fprintf(stderr, "failed to lookup OID %s\n", git_oid_tostr_s(target_oid));
+		return -1;
+	}
+
+	/* Checkout the result so the workdir is in the expected state */
+	ff_checkout_options.checkout_strategy = GIT_CHECKOUT_SAFE;
+	err = git_checkout_tree(repo, target, &ff_checkout_options);
+	if (err != 0) {
+		fprintf(stderr, "failed to checkout HEAD reference\n");
+		return -1;
+	}
+
+	/* Move the target reference to the target OID */
+	err = git_reference_set_target(&new_target_ref, target_ref, target_oid, NULL);
+	if (err != 0) {
+		fprintf(stderr, "failed to move HEAD reference\n");
+		return -1;
+	}
+
+	git_reference_free(target_ref);
+	git_reference_free(new_target_ref);
+	git_object_free(target);
+
+	return 0;
+}
+
+static void output_conflicts(git_index *index)
+{
+	git_index_conflict_iterator *conflicts;
+	const git_index_entry *ancestor;
+	const git_index_entry *our;
+	const git_index_entry *their;
+	int err = 0;
+
+	check_lg2(git_index_conflict_iterator_new(&conflicts, index), "failed to create conflict iterator", NULL);
+
+	while ((err = git_index_conflict_next(&ancestor, &our, &their, conflicts)) == 0) {
+		fprintf(stderr, "conflict: a:%s o:%s t:%s\n",
+		        ancestor ? ancestor->path : "NULL",
+		        our->path ? our->path : "NULL",
+		        their->path ? their->path : "NULL");
+	}
+
+	if (err != GIT_ITEROVER) {
+		fprintf(stderr, "error iterating conflicts\n");
+	}
+
+	git_index_conflict_iterator_free(conflicts);
+}
+
+static int create_merge_commit(git_repository *repo, git_index *index, struct merge_options *opts)
+{
+	git_oid tree_oid, commit_oid;
+	git_tree *tree;
+	git_signature *sign;
+	git_reference *merge_ref = NULL;
+	git_annotated_commit *merge_commit;
+	git_reference *head_ref;
+	git_commit **parents = calloc(opts->annotated_count + 1, sizeof(git_commit *));
+	const char *msg_target = NULL;
+	size_t msglen = 0;
+	char *msg;
+	size_t i;
+	int err;
+
+	/* Grab our needed references */
+	check_lg2(git_repository_head(&head_ref, repo), "failed to get repo HEAD", NULL);
+	if (resolve_refish(&merge_commit, repo, opts->heads[0])) {
+		fprintf(stderr, "failed to resolve refish %s", opts->heads[0]);
+		free(parents);
+		return -1;
+	}
+
+	/* Maybe that's a ref, so DWIM it */
+	err = git_reference_dwim(&merge_ref, repo, opts->heads[0]);
+	check_lg2(err, "failed to DWIM reference", git_error_last()->message);
+
+	/* Grab a signature */
+	check_lg2(git_signature_now(&sign, "Me", "me@example.com"), "failed to create signature", NULL);
+
+#define MERGE_COMMIT_MSG "Merge %s '%s'"
+	/* Prepare a standard merge commit message */
+	if (merge_ref != NULL) {
+		check_lg2(git_branch_name(&msg_target, merge_ref), "failed to get branch name of merged ref", NULL);
+	} else {
+		msg_target = git_oid_tostr_s(git_annotated_commit_id(merge_commit));
+	}
+
+	msglen = snprintf(NULL, 0, MERGE_COMMIT_MSG, (merge_ref ? "branch" : "commit"), msg_target);
+	if (msglen > 0) msglen++;
+	msg = malloc(msglen);
+	err = snprintf(msg, msglen, MERGE_COMMIT_MSG, (merge_ref ? "branch" : "commit"), msg_target);
+
+	/* This is only to silence the compiler */
+	if (err < 0) goto cleanup;
+
+	/* Setup our parent commits */
+	err = git_reference_peel((git_object **)&parents[0], head_ref, GIT_OBJECT_COMMIT);
+	check_lg2(err, "failed to peel head reference", NULL);
+	for (i = 0; i < opts->annotated_count; i++) {
+		git_commit_lookup(&parents[i + 1], repo, git_annotated_commit_id(opts->annotated[i]));
+	}
+
+	/* Prepare our commit tree */
+	check_lg2(git_index_write_tree(&tree_oid, index), "failed to write merged tree", NULL);
+	check_lg2(git_tree_lookup(&tree, repo, &tree_oid), "failed to lookup tree", NULL);
+
+	/* Commit time ! */
+	err = git_commit_create(&commit_oid,
+	                        repo, git_reference_name(head_ref),
+	                        sign, sign,
+	                        NULL, msg,
+	                        tree,
+	                        opts->annotated_count + 1, (const git_commit **)parents);
+	check_lg2(err, "failed to create commit", NULL);
+
+	/* We're done merging, cleanup the repository state */
+	git_repository_state_cleanup(repo);
+
+cleanup:
+	free(parents);
+	return err;
+}
+
+int lg2_merge(git_repository *repo, int argc, char **argv)
+{
+	struct merge_options opts;
+	git_index *index;
+	git_repository_state_t state;
+	git_merge_analysis_t analysis;
+	git_merge_preference_t preference;
+	const char *path = ".";
+	int err = 0;
+
+	merge_options_init(&opts);
+	parse_options(&path, &opts, argc, argv);
+
+	state = git_repository_state(repo);
+	if (state != GIT_REPOSITORY_STATE_NONE) {
+		fprintf(stderr, "repository is in unexpected state %d\n", state);
+		goto cleanup;
+	}
+
+	err = resolve_heads(repo, &opts);
+	if (err != 0)
+		goto cleanup;
+
+	err = git_merge_analysis(&analysis, &preference,
+	                         repo,
+	                         (const git_annotated_commit **)opts.annotated,
+	                         opts.annotated_count);
+	check_lg2(err, "merge analysis failed", NULL);
+
+	if (analysis & GIT_MERGE_ANALYSIS_UP_TO_DATE) {
+		printf("Already up-to-date\n");
+		return 0;
+	} else if (analysis & GIT_MERGE_ANALYSIS_UNBORN ||
+	          (analysis & GIT_MERGE_ANALYSIS_FASTFORWARD &&
+	          !(preference & GIT_MERGE_PREFERENCE_NO_FASTFORWARD))) {
+		const git_oid *target_oid;
+		if (analysis & GIT_MERGE_ANALYSIS_UNBORN) {
+			printf("Unborn\n");
+		} else {
+			printf("Fast-forward\n");
+		}
+
+		/* Since this is a fast-forward, there can be only one merge head */
+		target_oid = git_annotated_commit_id(opts.annotated[0]);
+		assert(opts.annotated_count == 1);
+
+		return perform_fastforward(repo, target_oid, (analysis & GIT_MERGE_ANALYSIS_UNBORN));
+	} else if (analysis & GIT_MERGE_ANALYSIS_NORMAL) {
+		git_merge_options merge_opts = GIT_MERGE_OPTIONS_INIT;
+		git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
+
+		merge_opts.flags = 0;
+		merge_opts.file_flags = GIT_MERGE_FILE_STYLE_DIFF3;
+
+		checkout_opts.checkout_strategy = GIT_CHECKOUT_FORCE|GIT_CHECKOUT_ALLOW_CONFLICTS;
+
+		if (preference & GIT_MERGE_PREFERENCE_FASTFORWARD_ONLY) {
+			printf("Fast-forward is preferred, but only a merge is possible\n");
+			return -1;
+		}
+
+		err = git_merge(repo,
+		                (const git_annotated_commit **)opts.annotated, opts.annotated_count,
+		                &merge_opts, &checkout_opts);
+		check_lg2(err, "merge failed", NULL);
+	}
+
+	/* If we get here, we actually performed the merge above */
+
+	check_lg2(git_repository_index(&index, repo), "failed to get repository index", NULL);
+
+	if (git_index_has_conflicts(index)) {
+		/* Handle conflicts */
+		output_conflicts(index);
+	} else if (!opts.no_commit) {
+		create_merge_commit(repo, index, &opts);
+		printf("Merge made\n");
+	}
+
+cleanup:
+	free((char **)opts.heads);
+	free(opts.annotated);
+
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/examples/remote.c

@@ -0,0 +1,256 @@
+/*
+ * libgit2 "remote" example - shows how to modify remotes for a repo
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This is a sample program that is similar to "git remote".  See the
+ * documentation for that (try "git help remote") to understand what this
+ * program is emulating.
+ *
+ * This demonstrates using the libgit2 APIs to modify remotes of a repository.
+ */
+
+enum subcmd {
+	subcmd_add,
+	subcmd_remove,
+	subcmd_rename,
+	subcmd_seturl,
+	subcmd_show,
+};
+
+struct remote_opts {
+	enum subcmd cmd;
+
+	/* for command-specific args */
+	int argc;
+	char **argv;
+};
+
+static int cmd_add(git_repository *repo, struct remote_opts *o);
+static int cmd_remove(git_repository *repo, struct remote_opts *o);
+static int cmd_rename(git_repository *repo, struct remote_opts *o);
+static int cmd_seturl(git_repository *repo, struct remote_opts *o);
+static int cmd_show(git_repository *repo, struct remote_opts *o);
+
+static void parse_subcmd(
+	struct remote_opts *opt, int argc, char **argv);
+static void usage(const char *msg, const char *arg);
+
+int lg2_remote(git_repository *repo, int argc, char *argv[])
+{
+	int retval = 0;
+	struct remote_opts opt = {0};
+
+	parse_subcmd(&opt, argc, argv);
+
+	switch (opt.cmd)
+	{
+	case subcmd_add:
+		retval = cmd_add(repo, &opt);
+		break;
+	case subcmd_remove:
+		retval = cmd_remove(repo, &opt);
+		break;
+	case subcmd_rename:
+		retval = cmd_rename(repo, &opt);
+		break;
+	case subcmd_seturl:
+		retval = cmd_seturl(repo, &opt);
+		break;
+	case subcmd_show:
+		retval = cmd_show(repo, &opt);
+		break;
+	}
+
+	return retval;
+}
+
+static int cmd_add(git_repository *repo, struct remote_opts *o)
+{
+	char *name, *url;
+	git_remote *remote = {0};
+
+	if (o->argc != 2)
+		usage("you need to specify a name and URL", NULL);
+
+	name = o->argv[0];
+	url = o->argv[1];
+
+	check_lg2(git_remote_create(&remote, repo, name, url),
+			"could not create remote", NULL);
+
+	return 0;
+}
+
+static int cmd_remove(git_repository *repo, struct remote_opts *o)
+{
+	char *name;
+
+	if (o->argc != 1)
+		usage("you need to specify a name", NULL);
+
+	name = o->argv[0];
+
+	check_lg2(git_remote_delete(repo, name),
+			"could not delete remote", name);
+
+	return 0;
+}
+
+static int cmd_rename(git_repository *repo, struct remote_opts *o)
+{
+	int i, retval;
+	char *old, *new;
+	git_strarray problems = {0};
+
+	if (o->argc != 2)
+		usage("you need to specify old and new remote name", NULL);
+
+	old = o->argv[0];
+	new = o->argv[1];
+
+	retval = git_remote_rename(&problems, repo, old, new);
+	if (!retval)
+		return 0;
+
+	for (i = 0; i < (int) problems.count; i++) {
+		puts(problems.strings[0]);
+	}
+
+	git_strarray_free(&problems);
+
+	return retval;
+}
+
+static int cmd_seturl(git_repository *repo, struct remote_opts *o)
+{
+	int i, retval, push = 0;
+	char *name = NULL, *url = NULL;
+
+	for (i = 0; i < o->argc; i++) {
+		char *arg = o->argv[i];
+
+		if (!strcmp(arg, "--push")) {
+			push = 1;
+		} else if (arg[0] != '-' && name == NULL) {
+			name = arg;
+		} else if (arg[0] != '-' && url == NULL) {
+			url = arg;
+		} else {
+			usage("invalid argument to set-url", arg);
+		}
+	}
+
+	if (name == NULL || url == NULL)
+		usage("you need to specify remote and the new URL", NULL);
+
+	if (push)
+		retval = git_remote_set_pushurl(repo, name, url);
+	else
+		retval = git_remote_set_url(repo, name, url);
+
+	check_lg2(retval, "could not set URL", url);
+
+	return 0;
+}
+
+static int cmd_show(git_repository *repo, struct remote_opts *o)
+{
+	int i;
+	const char *arg, *name, *fetch, *push;
+	int verbose = 0;
+	git_strarray remotes = {0};
+	git_remote *remote = {0};
+
+	for (i = 0; i < o->argc; i++) {
+		arg = o->argv[i];
+
+		if (!strcmp(arg, "-v") || !strcmp(arg, "--verbose")) {
+			verbose = 1;
+		}
+	}
+
+	check_lg2(git_remote_list(&remotes, repo),
+		"could not retrieve remotes", NULL);
+
+	for (i = 0; i < (int) remotes.count; i++) {
+		name = remotes.strings[i];
+		if (!verbose) {
+			puts(name);
+			continue;
+		}
+
+		check_lg2(git_remote_lookup(&remote, repo, name),
+			"could not look up remote", name);
+
+		fetch = git_remote_url(remote);
+		if (fetch)
+			printf("%s\t%s (fetch)\n", name, fetch);
+		push = git_remote_pushurl(remote);
+		/* use fetch URL if no distinct push URL has been set */
+		push = push ? push : fetch;
+		if (push)
+			printf("%s\t%s (push)\n", name, push);
+
+		git_remote_free(remote);
+	}
+
+	git_strarray_free(&remotes);
+
+	return 0;
+}
+
+static void parse_subcmd(
+	struct remote_opts *opt, int argc, char **argv)
+{
+	char *arg = argv[1];
+	enum subcmd cmd = 0;
+
+	if (argc < 2)
+		usage("no command specified", NULL);
+
+	if (!strcmp(arg, "add")) {
+		cmd = subcmd_add;
+	} else if (!strcmp(arg, "remove")) {
+		cmd = subcmd_remove;
+	} else if (!strcmp(arg, "rename")) {
+		cmd = subcmd_rename;
+	} else if (!strcmp(arg, "set-url")) {
+		cmd = subcmd_seturl;
+	} else if (!strcmp(arg, "show")) {
+		cmd = subcmd_show;
+	} else {
+		usage("command is not valid", arg);
+	}
+	opt->cmd = cmd;
+
+	opt->argc = argc - 2; /* executable and subcommand are removed */
+	opt->argv = argv + 2;
+}
+
+static void usage(const char *msg, const char *arg)
+{
+	fputs("usage: remote add <name> <url>\n", stderr);
+	fputs("       remote remove <name>\n", stderr);
+	fputs("       remote rename <old> <new>\n", stderr);
+	fputs("       remote set-url [--push] <name> <newurl>\n", stderr);
+	fputs("       remote show [-v|--verbose]\n", stderr);
+
+	if (msg && !arg)
+		fprintf(stderr, "\n%s\n", msg);
+	else if (msg && arg)
+		fprintf(stderr, "\n%s: %s\n", msg, arg);
+	exit(1);
+}

node_modules/nodegit/vendor/libgit2/examples/rev-list.c

@@ -0,0 +1,152 @@
+/*
+ * libgit2 "rev-list" example - shows how to transform a rev-spec into a list
+ * of commit ids
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+#include <assert.h>
+
+static int revwalk_parse_options(git_sort_t *sort, struct args_info *args);
+static int revwalk_parse_revs(git_repository *repo, git_revwalk *walk, struct args_info *args);
+
+int lg2_rev_list(git_repository *repo, int argc, char **argv)
+{
+	struct args_info args = ARGS_INFO_INIT;
+	git_revwalk *walk;
+	git_oid oid;
+	git_sort_t sort;
+	char buf[GIT_OID_HEXSZ+1];
+
+	check_lg2(revwalk_parse_options(&sort, &args), "parsing options", NULL);
+
+	check_lg2(git_revwalk_new(&walk, repo), "allocating revwalk", NULL);
+	git_revwalk_sorting(walk, sort);
+	check_lg2(revwalk_parse_revs(repo, walk, &args), "parsing revs", NULL);
+
+	while (!git_revwalk_next(&oid, walk)) {
+		git_oid_fmt(buf, &oid);
+		buf[GIT_OID_HEXSZ] = '\0';
+		printf("%s\n", buf);
+	}
+
+	git_revwalk_free(walk);
+	return 0;
+}
+
+static int push_commit(git_revwalk *walk, const git_oid *oid, int hide)
+{
+	if (hide)
+		return git_revwalk_hide(walk, oid);
+	else
+		return git_revwalk_push(walk, oid);
+}
+
+static int push_spec(git_repository *repo, git_revwalk *walk, const char *spec, int hide)
+{
+	int error;
+	git_object *obj;
+
+	if ((error = git_revparse_single(&obj, repo, spec)) < 0)
+		return error;
+
+	error = push_commit(walk, git_object_id(obj), hide);
+	git_object_free(obj);
+	return error;
+}
+
+static int push_range(git_repository *repo, git_revwalk *walk, const char *range, int hide)
+{
+	git_revspec revspec;
+	int error = 0;
+
+	if ((error = git_revparse(&revspec, repo, range)))
+		return error;
+
+	if (revspec.flags & GIT_REVPARSE_MERGE_BASE) {
+		/* TODO: support "<commit>...<commit>" */
+		return GIT_EINVALIDSPEC;
+	}
+
+	if ((error = push_commit(walk, git_object_id(revspec.from), !hide)))
+		goto out;
+
+	error = push_commit(walk, git_object_id(revspec.to), hide);
+
+out:
+	git_object_free(revspec.from);
+	git_object_free(revspec.to);
+	return error;
+}
+
+static void print_usage(void)
+{
+	fprintf(stderr, "rev-list [--git-dir=dir] [--topo-order|--date-order] [--reverse] <revspec>\n");
+	exit(-1);
+}
+
+static int revwalk_parse_options(git_sort_t *sort, struct args_info *args)
+{
+	assert(sort && args);
+	*sort = GIT_SORT_NONE;
+
+	if (args->argc < 1)
+		print_usage();
+
+	for (args->pos = 1; args->pos < args->argc; ++args->pos) {
+		const char *curr = args->argv[args->pos];
+
+		if (!strcmp(curr, "--topo-order")) {
+			*sort |= GIT_SORT_TOPOLOGICAL;
+		} else if (!strcmp(curr, "--date-order")) {
+			*sort |= GIT_SORT_TIME;
+		} else if (!strcmp(curr, "--reverse")) {
+			*sort |= (*sort & ~GIT_SORT_REVERSE) ^ GIT_SORT_REVERSE;
+		} else {
+			break;
+		}
+	}
+	return 0;
+}
+
+static int revwalk_parse_revs(git_repository *repo, git_revwalk *walk, struct args_info *args)
+{
+	int hide, error;
+	git_oid oid;
+
+	hide = 0;
+	for (; args->pos < args->argc; ++args->pos) {
+		const char *curr = args->argv[args->pos];
+
+		if (!strcmp(curr, "--not")) {
+			hide = !hide;
+		} else if (curr[0] == '^') {
+			if ((error = push_spec(repo, walk, curr + 1, !hide)))
+				return error;
+		} else if (strstr(curr, "..")) {
+			if ((error = push_range(repo, walk, curr, hide)))
+				return error;
+		} else {
+			if (push_spec(repo, walk, curr, hide) == 0)
+				continue;
+
+			if ((error = git_oid_fromstr(&oid, curr)))
+				return error;
+			if ((error = push_commit(walk, &oid, hide)))
+				return error;
+		}
+	}
+
+	return 0;
+}
+

node_modules/nodegit/vendor/libgit2/examples/rev-parse.c

@@ -0,0 +1,102 @@
+/*
+ * libgit2 "rev-parse" example - shows how to parse revspecs
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/** Forward declarations for helpers. */
+struct parse_state {
+	const char *repodir;
+	const char *spec;
+	int not;
+};
+static void parse_opts(struct parse_state *ps, int argc, char *argv[]);
+static int parse_revision(git_repository *repo, struct parse_state *ps);
+
+int lg2_rev_parse(git_repository *repo, int argc, char *argv[])
+{
+	struct parse_state ps = {0};
+
+	parse_opts(&ps, argc, argv);
+
+	check_lg2(parse_revision(repo, &ps), "Parsing", NULL);
+
+	return 0;
+}
+
+static void usage(const char *message, const char *arg)
+{
+	if (message && arg)
+		fprintf(stderr, "%s: %s\n", message, arg);
+	else if (message)
+		fprintf(stderr, "%s\n", message);
+	fprintf(stderr, "usage: rev-parse [ --option ] <args>...\n");
+	exit(1);
+}
+
+static void parse_opts(struct parse_state *ps, int argc, char *argv[])
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	for (args.pos=1; args.pos < argc; ++args.pos) {
+		const char *a = argv[args.pos];
+
+		if (a[0] != '-') {
+			if (ps->spec)
+				usage("Too many specs", a);
+			ps->spec = a;
+		} else if (!strcmp(a, "--not"))
+			ps->not = !ps->not;
+		else if (!match_str_arg(&ps->repodir, &args, "--git-dir"))
+			usage("Cannot handle argument", a);
+	}
+}
+
+static int parse_revision(git_repository *repo, struct parse_state *ps)
+{
+	git_revspec rs;
+	char str[GIT_OID_HEXSZ + 1];
+
+	check_lg2(git_revparse(&rs, repo, ps->spec), "Could not parse", ps->spec);
+
+	if ((rs.flags & GIT_REVPARSE_SINGLE) != 0) {
+		git_oid_tostr(str, sizeof(str), git_object_id(rs.from));
+		printf("%s\n", str);
+		git_object_free(rs.from);
+	}
+	else if ((rs.flags & GIT_REVPARSE_RANGE) != 0) {
+		git_oid_tostr(str, sizeof(str), git_object_id(rs.to));
+		printf("%s\n", str);
+		git_object_free(rs.to);
+
+		if ((rs.flags & GIT_REVPARSE_MERGE_BASE) != 0) {
+			git_oid base;
+			check_lg2(git_merge_base(&base, repo,
+						git_object_id(rs.from), git_object_id(rs.to)),
+					"Could not find merge base", ps->spec);
+
+			git_oid_tostr(str, sizeof(str), &base);
+			printf("%s\n", str);
+		}
+
+		git_oid_tostr(str, sizeof(str), git_object_id(rs.from));
+		printf("^%s\n", str);
+		git_object_free(rs.from);
+	}
+	else {
+		fatal("Invalid results from git_revparse", ps->spec);
+	}
+
+	return 0;
+}
+

node_modules/nodegit/vendor/libgit2/examples/show-index.c

@@ -0,0 +1,66 @@
+/*
+ * libgit2 "showindex" example - shows how to extract data from the index
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+int lg2_show_index(git_repository *repo, int argc, char **argv)
+{
+	git_index *index;
+	size_t i, ecount;
+	char *dir = ".";
+	size_t dirlen;
+	char out[GIT_OID_HEXSZ+1];
+	out[GIT_OID_HEXSZ] = '\0';
+
+	if (argc > 2)
+		fatal("usage: showindex [<repo-dir>]", NULL);
+	if (argc > 1)
+		dir = argv[1];
+
+	dirlen = strlen(dir);
+	if (dirlen > 5 && strcmp(dir + dirlen - 5, "index") == 0) {
+		check_lg2(git_index_open(&index, dir), "could not open index", dir);
+	} else {
+		check_lg2(git_repository_open_ext(&repo, dir, 0, NULL), "could not open repository", dir);
+		check_lg2(git_repository_index(&index, repo), "could not open repository index", NULL);
+		git_repository_free(repo);
+	}
+
+	git_index_read(index, 0);
+
+	ecount = git_index_entrycount(index);
+	if (!ecount)
+		printf("Empty index\n");
+
+	for (i = 0; i < ecount; ++i) {
+		const git_index_entry *e = git_index_get_byindex(index, i);
+
+		git_oid_fmt(out, &e->id);
+
+		printf("File Path: %s\n", e->path);
+		printf("    Stage: %d\n", git_index_entry_stage(e));
+		printf(" Blob SHA: %s\n", out);
+		printf("File Mode: %07o\n", e->mode);
+		printf("File Size: %d bytes\n", (int)e->file_size);
+		printf("Dev/Inode: %d/%d\n", (int)e->dev, (int)e->ino);
+		printf("  UID/GID: %d/%d\n", (int)e->uid, (int)e->gid);
+		printf("    ctime: %d\n", (int)e->ctime.seconds);
+		printf("    mtime: %d\n", (int)e->mtime.seconds);
+		printf("\n");
+	}
+
+	git_index_free(index);
+
+	return 0;
+}

node_modules/nodegit/vendor/libgit2/examples/stash.c

@@ -0,0 +1,157 @@
+/*
+ * libgit2 "stash" example - shows how to use the stash API
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include <stdarg.h>
+
+#include "common.h"
+
+enum subcmd {
+	SUBCMD_APPLY,
+	SUBCMD_LIST,
+	SUBCMD_POP,
+	SUBCMD_PUSH
+};
+
+struct opts {
+	enum subcmd cmd;
+	int argc;
+	char **argv;
+};
+
+static void usage(const char *fmt, ...)
+{
+	va_list ap;
+
+	fputs("usage: git stash list\n", stderr);
+	fputs("   or: git stash ( pop | apply )\n", stderr);
+	fputs("   or: git stash [push]\n", stderr);
+	fputs("\n", stderr);
+
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+
+	exit(1);
+}
+
+static void parse_subcommand(struct opts *opts, int argc, char *argv[])
+{
+	char *arg = (argc < 2) ? "push" : argv[1];
+	enum subcmd cmd;
+
+	if (!strcmp(arg, "apply")) {
+		cmd = SUBCMD_APPLY;
+	} else if (!strcmp(arg, "list")) {
+		cmd = SUBCMD_LIST;
+	} else if (!strcmp(arg, "pop")) {
+		cmd = SUBCMD_POP;
+	} else if (!strcmp(arg, "push")) {
+		cmd = SUBCMD_PUSH;
+	} else {
+		usage("invalid command %s", arg);
+		return;
+	}
+
+	opts->cmd = cmd;
+	opts->argc = (argc < 2) ? argc - 1 : argc - 2;
+	opts->argv = argv;
+}
+
+static int cmd_apply(git_repository *repo, struct opts *opts)
+{
+	if (opts->argc)
+		usage("apply does not accept any parameters");
+
+	check_lg2(git_stash_apply(repo, 0, NULL),
+		  "Unable to apply stash", NULL);
+
+	return 0;
+}
+
+static int list_stash_cb(size_t index, const char *message,
+			 const git_oid *stash_id, void *payload)
+{
+	UNUSED(stash_id);
+	UNUSED(payload);
+	printf("stash@{%"PRIuZ"}: %s\n", index, message);
+	return 0;
+}
+
+static int cmd_list(git_repository *repo, struct opts *opts)
+{
+	if (opts->argc)
+		usage("list does not accept any parameters");
+
+	check_lg2(git_stash_foreach(repo, list_stash_cb, NULL),
+		  "Unable to list stashes", NULL);
+
+	return 0;
+}
+
+static int cmd_push(git_repository *repo, struct opts *opts)
+{
+	git_signature *signature;
+	git_commit *stash;
+	git_oid stashid;
+
+	if (opts->argc)
+		usage("push does not accept any parameters");
+
+	check_lg2(git_signature_default(&signature, repo),
+		  "Unable to get signature", NULL);
+	check_lg2(git_stash_save(&stashid, repo, signature, NULL, GIT_STASH_DEFAULT),
+		  "Unable to save stash", NULL);
+	check_lg2(git_commit_lookup(&stash, repo, &stashid),
+		  "Unable to lookup stash commit", NULL);
+
+	printf("Saved working directory %s\n", git_commit_summary(stash));
+
+	git_signature_free(signature);
+	git_commit_free(stash);
+
+	return 0;
+}
+
+static int cmd_pop(git_repository *repo, struct opts *opts)
+{
+	if (opts->argc)
+		usage("pop does not accept any parameters");
+
+	check_lg2(git_stash_pop(repo, 0, NULL),
+		  "Unable to pop stash", NULL);
+
+	printf("Dropped refs/stash@{0}\n");
+
+	return 0;
+}
+
+int lg2_stash(git_repository *repo, int argc, char *argv[])
+{
+	struct opts opts = { 0 };
+
+	parse_subcommand(&opts, argc, argv);
+
+	switch (opts.cmd) {
+		case SUBCMD_APPLY:
+			return cmd_apply(repo, &opts);
+		case SUBCMD_LIST:
+			return cmd_list(repo, &opts);
+		case SUBCMD_PUSH:
+			return cmd_push(repo, &opts);
+		case SUBCMD_POP:
+			return cmd_pop(repo, &opts);
+	}
+
+	return -1;
+}

node_modules/nodegit/vendor/libgit2/examples/status.c

@@ -0,0 +1,498 @@
+/*
+ * libgit2 "status" example - shows how to use the status APIs
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates the use of the libgit2 status APIs,
+ * particularly the `git_status_list` object, to roughly simulate the
+ * output of running `git status`.  It serves as a simple example of
+ * using those APIs to get basic status information.
+ *
+ * This does not have:
+ *
+ * - Robust error handling
+ * - Colorized or paginated output formatting
+ *
+ * This does have:
+ *
+ * - Examples of translating command line arguments to the status
+ *   options settings to mimic `git status` results.
+ * - A sample status formatter that matches the default "long" format
+ *   from `git status`
+ * - A sample status formatter that matches the "short" format
+ */
+
+enum {
+	FORMAT_DEFAULT   = 0,
+	FORMAT_LONG      = 1,
+	FORMAT_SHORT     = 2,
+	FORMAT_PORCELAIN = 3,
+};
+
+#define MAX_PATHSPEC 8
+
+struct status_opts {
+	git_status_options statusopt;
+	char *repodir;
+	char *pathspec[MAX_PATHSPEC];
+	int npaths;
+	int format;
+	int zterm;
+	int showbranch;
+	int showsubmod;
+	int repeat;
+};
+
+static void parse_opts(struct status_opts *o, int argc, char *argv[]);
+static void show_branch(git_repository *repo, int format);
+static void print_long(git_status_list *status);
+static void print_short(git_repository *repo, git_status_list *status);
+static int print_submod(git_submodule *sm, const char *name, void *payload);
+
+int lg2_status(git_repository *repo, int argc, char *argv[])
+{
+	git_status_list *status;
+	struct status_opts o = { GIT_STATUS_OPTIONS_INIT, "." };
+
+	o.statusopt.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
+	o.statusopt.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
+		GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
+		GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
+
+	parse_opts(&o, argc, argv);
+
+	if (git_repository_is_bare(repo))
+		fatal("Cannot report status on bare repository",
+			git_repository_path(repo));
+
+show_status:
+	if (o.repeat)
+		printf("\033[H\033[2J");
+
+	/**
+	 * Run status on the repository
+	 *
+	 * We use `git_status_list_new()` to generate a list of status
+	 * information which lets us iterate over it at our
+	 * convenience and extract the data we want to show out of
+	 * each entry.
+	 *
+	 * You can use `git_status_foreach()` or
+	 * `git_status_foreach_ext()` if you'd prefer to execute a
+	 * callback for each entry. The latter gives you more control
+	 * about what results are presented.
+	 */
+	check_lg2(git_status_list_new(&status, repo, &o.statusopt),
+		"Could not get status", NULL);
+
+	if (o.showbranch)
+		show_branch(repo, o.format);
+
+	if (o.showsubmod) {
+		int submod_count = 0;
+		check_lg2(git_submodule_foreach(repo, print_submod, &submod_count),
+			"Cannot iterate submodules", o.repodir);
+	}
+
+	if (o.format == FORMAT_LONG)
+		print_long(status);
+	else
+		print_short(repo, status);
+
+	git_status_list_free(status);
+
+	if (o.repeat) {
+		sleep(o.repeat);
+		goto show_status;
+	}
+
+	return 0;
+}
+
+/**
+ * If the user asked for the branch, let's show the short name of the
+ * branch.
+ */
+static void show_branch(git_repository *repo, int format)
+{
+	int error = 0;
+	const char *branch = NULL;
+	git_reference *head = NULL;
+
+	error = git_repository_head(&head, repo);
+
+	if (error == GIT_EUNBORNBRANCH || error == GIT_ENOTFOUND)
+		branch = NULL;
+	else if (!error) {
+		branch = git_reference_shorthand(head);
+	} else
+		check_lg2(error, "failed to get current branch", NULL);
+
+	if (format == FORMAT_LONG)
+		printf("# On branch %s\n",
+			branch ? branch : "Not currently on any branch.");
+	else
+		printf("## %s\n", branch ? branch : "HEAD (no branch)");
+
+	git_reference_free(head);
+}
+
+/**
+ * This function print out an output similar to git's status command
+ * in long form, including the command-line hints.
+ */
+static void print_long(git_status_list *status)
+{
+	size_t i, maxi = git_status_list_entrycount(status);
+	const git_status_entry *s;
+	int header = 0, changes_in_index = 0;
+	int changed_in_workdir = 0, rm_in_workdir = 0;
+	const char *old_path, *new_path;
+
+	/** Print index changes. */
+
+	for (i = 0; i < maxi; ++i) {
+		char *istatus = NULL;
+
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_CURRENT)
+			continue;
+
+		if (s->status & GIT_STATUS_WT_DELETED)
+			rm_in_workdir = 1;
+
+		if (s->status & GIT_STATUS_INDEX_NEW)
+			istatus = "new file: ";
+		if (s->status & GIT_STATUS_INDEX_MODIFIED)
+			istatus = "modified: ";
+		if (s->status & GIT_STATUS_INDEX_DELETED)
+			istatus = "deleted:  ";
+		if (s->status & GIT_STATUS_INDEX_RENAMED)
+			istatus = "renamed:  ";
+		if (s->status & GIT_STATUS_INDEX_TYPECHANGE)
+			istatus = "typechange:";
+
+		if (istatus == NULL)
+			continue;
+
+		if (!header) {
+			printf("# Changes to be committed:\n");
+			printf("#   (use \"git reset HEAD <file>...\" to unstage)\n");
+			printf("#\n");
+			header = 1;
+		}
+
+		old_path = s->head_to_index->old_file.path;
+		new_path = s->head_to_index->new_file.path;
+
+		if (old_path && new_path && strcmp(old_path, new_path))
+			printf("#\t%s  %s -> %s\n", istatus, old_path, new_path);
+		else
+			printf("#\t%s  %s\n", istatus, old_path ? old_path : new_path);
+	}
+
+	if (header) {
+		changes_in_index = 1;
+		printf("#\n");
+	}
+	header = 0;
+
+	/** Print workdir changes to tracked files. */
+
+	for (i = 0; i < maxi; ++i) {
+		char *wstatus = NULL;
+
+		s = git_status_byindex(status, i);
+
+		/**
+		 * With `GIT_STATUS_OPT_INCLUDE_UNMODIFIED` (not used in this example)
+		 * `index_to_workdir` may not be `NULL` even if there are
+		 * no differences, in which case it will be a `GIT_DELTA_UNMODIFIED`.
+		 */
+		if (s->status == GIT_STATUS_CURRENT || s->index_to_workdir == NULL)
+			continue;
+
+		/** Print out the output since we know the file has some changes */
+		if (s->status & GIT_STATUS_WT_MODIFIED)
+			wstatus = "modified: ";
+		if (s->status & GIT_STATUS_WT_DELETED)
+			wstatus = "deleted:  ";
+		if (s->status & GIT_STATUS_WT_RENAMED)
+			wstatus = "renamed:  ";
+		if (s->status & GIT_STATUS_WT_TYPECHANGE)
+			wstatus = "typechange:";
+
+		if (wstatus == NULL)
+			continue;
+
+		if (!header) {
+			printf("# Changes not staged for commit:\n");
+			printf("#   (use \"git add%s <file>...\" to update what will be committed)\n", rm_in_workdir ? "/rm" : "");
+			printf("#   (use \"git checkout -- <file>...\" to discard changes in working directory)\n");
+			printf("#\n");
+			header = 1;
+		}
+
+		old_path = s->index_to_workdir->old_file.path;
+		new_path = s->index_to_workdir->new_file.path;
+
+		if (old_path && new_path && strcmp(old_path, new_path))
+			printf("#\t%s  %s -> %s\n", wstatus, old_path, new_path);
+		else
+			printf("#\t%s  %s\n", wstatus, old_path ? old_path : new_path);
+	}
+
+	if (header) {
+		changed_in_workdir = 1;
+		printf("#\n");
+	}
+
+	/** Print untracked files. */
+
+	header = 0;
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_WT_NEW) {
+
+			if (!header) {
+				printf("# Untracked files:\n");
+				printf("#   (use \"git add <file>...\" to include in what will be committed)\n");
+				printf("#\n");
+				header = 1;
+			}
+
+			printf("#\t%s\n", s->index_to_workdir->old_file.path);
+		}
+	}
+
+	header = 0;
+
+	/** Print ignored files. */
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_IGNORED) {
+
+			if (!header) {
+				printf("# Ignored files:\n");
+				printf("#   (use \"git add -f <file>...\" to include in what will be committed)\n");
+				printf("#\n");
+				header = 1;
+			}
+
+			printf("#\t%s\n", s->index_to_workdir->old_file.path);
+		}
+	}
+
+	if (!changes_in_index && changed_in_workdir)
+		printf("no changes added to commit (use \"git add\" and/or \"git commit -a\")\n");
+}
+
+/**
+ * This version of the output prefixes each path with two status
+ * columns and shows submodule status information.
+ */
+static void print_short(git_repository *repo, git_status_list *status)
+{
+	size_t i, maxi = git_status_list_entrycount(status);
+	const git_status_entry *s;
+	char istatus, wstatus;
+	const char *extra, *a, *b, *c;
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_CURRENT)
+			continue;
+
+		a = b = c = NULL;
+		istatus = wstatus = ' ';
+		extra = "";
+
+		if (s->status & GIT_STATUS_INDEX_NEW)
+			istatus = 'A';
+		if (s->status & GIT_STATUS_INDEX_MODIFIED)
+			istatus = 'M';
+		if (s->status & GIT_STATUS_INDEX_DELETED)
+			istatus = 'D';
+		if (s->status & GIT_STATUS_INDEX_RENAMED)
+			istatus = 'R';
+		if (s->status & GIT_STATUS_INDEX_TYPECHANGE)
+			istatus = 'T';
+
+		if (s->status & GIT_STATUS_WT_NEW) {
+			if (istatus == ' ')
+				istatus = '?';
+			wstatus = '?';
+		}
+		if (s->status & GIT_STATUS_WT_MODIFIED)
+			wstatus = 'M';
+		if (s->status & GIT_STATUS_WT_DELETED)
+			wstatus = 'D';
+		if (s->status & GIT_STATUS_WT_RENAMED)
+			wstatus = 'R';
+		if (s->status & GIT_STATUS_WT_TYPECHANGE)
+			wstatus = 'T';
+
+		if (s->status & GIT_STATUS_IGNORED) {
+			istatus = '!';
+			wstatus = '!';
+		}
+
+		if (istatus == '?' && wstatus == '?')
+			continue;
+
+		/**
+		 * A commit in a tree is how submodules are stored, so
+		 * let's go take a look at its status.
+		 */
+		if (s->index_to_workdir &&
+			s->index_to_workdir->new_file.mode == GIT_FILEMODE_COMMIT)
+		{
+			unsigned int smstatus = 0;
+
+			if (!git_submodule_status(&smstatus, repo, s->index_to_workdir->new_file.path,
+						  GIT_SUBMODULE_IGNORE_UNSPECIFIED)) {
+				if (smstatus & GIT_SUBMODULE_STATUS_WD_MODIFIED)
+					extra = " (new commits)";
+				else if (smstatus & GIT_SUBMODULE_STATUS_WD_INDEX_MODIFIED)
+					extra = " (modified content)";
+				else if (smstatus & GIT_SUBMODULE_STATUS_WD_WD_MODIFIED)
+					extra = " (modified content)";
+				else if (smstatus & GIT_SUBMODULE_STATUS_WD_UNTRACKED)
+					extra = " (untracked content)";
+			}
+		}
+
+		/**
+		 * Now that we have all the information, format the output.
+		 */
+
+		if (s->head_to_index) {
+			a = s->head_to_index->old_file.path;
+			b = s->head_to_index->new_file.path;
+		}
+		if (s->index_to_workdir) {
+			if (!a)
+				a = s->index_to_workdir->old_file.path;
+			if (!b)
+				b = s->index_to_workdir->old_file.path;
+			c = s->index_to_workdir->new_file.path;
+		}
+
+		if (istatus == 'R') {
+			if (wstatus == 'R')
+				printf("%c%c %s %s %s%s\n", istatus, wstatus, a, b, c, extra);
+			else
+				printf("%c%c %s %s%s\n", istatus, wstatus, a, b, extra);
+		} else {
+			if (wstatus == 'R')
+				printf("%c%c %s %s%s\n", istatus, wstatus, a, c, extra);
+			else
+				printf("%c%c %s%s\n", istatus, wstatus, a, extra);
+		}
+	}
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_WT_NEW)
+			printf("?? %s\n", s->index_to_workdir->old_file.path);
+	}
+}
+
+static int print_submod(git_submodule *sm, const char *name, void *payload)
+{
+	int *count = payload;
+	(void)name;
+
+	if (*count == 0)
+		printf("# Submodules\n");
+	(*count)++;
+
+	printf("# - submodule '%s' at %s\n",
+		git_submodule_name(sm), git_submodule_path(sm));
+
+	return 0;
+}
+
+/**
+ * Parse options that git's status command supports.
+ */
+static void parse_opts(struct status_opts *o, int argc, char *argv[])
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		char *a = argv[args.pos];
+
+		if (a[0] != '-') {
+			if (o->npaths < MAX_PATHSPEC)
+				o->pathspec[o->npaths++] = a;
+			else
+				fatal("Example only supports a limited pathspec", NULL);
+		}
+		else if (!strcmp(a, "-s") || !strcmp(a, "--short"))
+			o->format = FORMAT_SHORT;
+		else if (!strcmp(a, "--long"))
+			o->format = FORMAT_LONG;
+		else if (!strcmp(a, "--porcelain"))
+			o->format = FORMAT_PORCELAIN;
+		else if (!strcmp(a, "-b") || !strcmp(a, "--branch"))
+			o->showbranch = 1;
+		else if (!strcmp(a, "-z")) {
+			o->zterm = 1;
+			if (o->format == FORMAT_DEFAULT)
+				o->format = FORMAT_PORCELAIN;
+		}
+		else if (!strcmp(a, "--ignored"))
+			o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_IGNORED;
+		else if (!strcmp(a, "-uno") ||
+				 !strcmp(a, "--untracked-files=no"))
+			o->statusopt.flags &= ~GIT_STATUS_OPT_INCLUDE_UNTRACKED;
+		else if (!strcmp(a, "-unormal") ||
+				 !strcmp(a, "--untracked-files=normal"))
+			o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_UNTRACKED;
+		else if (!strcmp(a, "-uall") ||
+				 !strcmp(a, "--untracked-files=all"))
+			o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_UNTRACKED |
+				GIT_STATUS_OPT_RECURSE_UNTRACKED_DIRS;
+		else if (!strcmp(a, "--ignore-submodules=all"))
+			o->statusopt.flags |= GIT_STATUS_OPT_EXCLUDE_SUBMODULES;
+		else if (!strncmp(a, "--git-dir=", strlen("--git-dir=")))
+			o->repodir = a + strlen("--git-dir=");
+		else if (!strcmp(a, "--repeat"))
+			o->repeat = 10;
+		else if (match_int_arg(&o->repeat, &args, "--repeat", 0))
+			/* okay */;
+		else if (!strcmp(a, "--list-submodules"))
+			o->showsubmod = 1;
+		else
+			check_lg2(-1, "Unsupported option", a);
+	}
+
+	if (o->format == FORMAT_DEFAULT)
+		o->format = FORMAT_LONG;
+	if (o->format == FORMAT_LONG)
+		o->showbranch = 1;
+	if (o->npaths > 0) {
+		o->statusopt.pathspec.strings = o->pathspec;
+		o->statusopt.pathspec.count   = o->npaths;
+	}
+}

node_modules/nodegit/vendor/libgit2/examples/tag.c

@@ -0,0 +1,310 @@
+/*
+ * libgit2 "tag" example - shows how to list, create and delete tags
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * The following example partially reimplements the `git tag` command
+ * and some of its options.
+ *
+ * These commands should work:
+
+ * - Tag name listing (`tag`)
+ * - Filtered tag listing with messages (`tag -n3 -l "v0.1*"`)
+ * - Lightweight tag creation (`tag test v0.18.0`)
+ * - Tag creation (`tag -a -m "Test message" test v0.18.0`)
+ * - Tag deletion (`tag -d test`)
+ *
+ * The command line parsing logic is simplified and doesn't handle
+ * all of the use cases.
+ */
+
+/** tag_options represents the parsed command line options */
+struct tag_options {
+	const char *message;
+	const char *pattern;
+	const char *tag_name;
+	const char *target;
+	int num_lines;
+	int force;
+};
+
+/** tag_state represents the current program state for dragging around */
+typedef struct {
+	git_repository *repo;
+	struct tag_options *opts;
+} tag_state;
+
+/** An action to execute based on the command line arguments */
+typedef void (*tag_action)(tag_state *state);
+typedef struct args_info args_info;
+
+static void check(int result, const char *message)
+{
+	if (result) fatal(message, NULL);
+}
+
+/** Tag listing: Print individual message lines */
+static void print_list_lines(const char *message, const tag_state *state)
+{
+	const char *msg = message;
+	int num = state->opts->num_lines - 1;
+
+	if (!msg) return;
+
+	/** first line - headline */
+	while(*msg && *msg != '\n') printf("%c", *msg++);
+
+	/** skip over new lines */
+	while(*msg && *msg == '\n') msg++;
+
+	printf("\n");
+
+	/** print just headline? */
+	if (num == 0) return;
+	if (*msg && msg[1]) printf("\n");
+
+	/** print individual commit/tag lines */
+	while (*msg && num-- >= 2) {
+		printf("    ");
+
+		while (*msg && *msg != '\n') printf("%c", *msg++);
+
+		/** handle consecutive new lines */
+		if (*msg && *msg == '\n' && msg[1] == '\n') {
+			num--;
+			printf("\n");
+		}
+		while(*msg && *msg == '\n') msg++;
+
+		printf("\n");
+	}
+}
+
+/** Tag listing: Print an actual tag object */
+static void print_tag(git_tag *tag, const tag_state *state)
+{
+	printf("%-16s", git_tag_name(tag));
+
+	if (state->opts->num_lines) {
+		const char *msg = git_tag_message(tag);
+		print_list_lines(msg, state);
+	} else {
+		printf("\n");
+	}
+}
+
+/** Tag listing: Print a commit (target of a lightweight tag) */
+static void print_commit(git_commit *commit, const char *name,
+		const tag_state *state)
+{
+	printf("%-16s", name);
+
+	if (state->opts->num_lines) {
+		const char *msg = git_commit_message(commit);
+		print_list_lines(msg, state);
+	} else {
+		printf("\n");
+	}
+}
+
+/** Tag listing: Fallback, should not happen */
+static void print_name(const char *name)
+{
+	printf("%s\n", name);
+}
+
+/** Tag listing: Lookup tags based on ref name and dispatch to print */
+static int each_tag(const char *name, tag_state *state)
+{
+	git_repository *repo = state->repo;
+	git_object *obj;
+
+	check_lg2(git_revparse_single(&obj, repo, name),
+			"Failed to lookup rev", name);
+
+	switch (git_object_type(obj)) {
+		case GIT_OBJECT_TAG:
+			print_tag((git_tag *) obj, state);
+			break;
+		case GIT_OBJECT_COMMIT:
+			print_commit((git_commit *) obj, name, state);
+			break;
+		default:
+			print_name(name);
+	}
+
+	git_object_free(obj);
+	return 0;
+}
+
+static void action_list_tags(tag_state *state)
+{
+	const char *pattern = state->opts->pattern;
+	git_strarray tag_names = {0};
+	size_t i;
+
+	check_lg2(git_tag_list_match(&tag_names, pattern ? pattern : "*", state->repo),
+			"Unable to get list of tags", NULL);
+
+	for(i = 0; i < tag_names.count; i++) {
+		each_tag(tag_names.strings[i], state);
+	}
+
+	git_strarray_free(&tag_names);
+}
+
+static void action_delete_tag(tag_state *state)
+{
+	struct tag_options *opts = state->opts;
+	git_object *obj;
+	git_buf abbrev_oid = {0};
+
+	check(!opts->tag_name, "Name required");
+
+	check_lg2(git_revparse_single(&obj, state->repo, opts->tag_name),
+			"Failed to lookup rev", opts->tag_name);
+
+	check_lg2(git_object_short_id(&abbrev_oid, obj),
+			"Unable to get abbreviated OID", opts->tag_name);
+
+	check_lg2(git_tag_delete(state->repo, opts->tag_name),
+			"Unable to delete tag", opts->tag_name);
+
+	printf("Deleted tag '%s' (was %s)\n", opts->tag_name, abbrev_oid.ptr);
+
+	git_buf_dispose(&abbrev_oid);
+	git_object_free(obj);
+}
+
+static void action_create_lighweight_tag(tag_state *state)
+{
+	git_repository *repo = state->repo;
+	struct tag_options *opts = state->opts;
+	git_oid oid;
+	git_object *target;
+
+	check(!opts->tag_name, "Name required");
+
+	if (!opts->target) opts->target = "HEAD";
+
+	check(!opts->target, "Target required");
+
+	check_lg2(git_revparse_single(&target, repo, opts->target),
+			"Unable to resolve spec", opts->target);
+
+	check_lg2(git_tag_create_lightweight(&oid, repo, opts->tag_name,
+				target, opts->force), "Unable to create tag", NULL);
+
+	git_object_free(target);
+}
+
+static void action_create_tag(tag_state *state)
+{
+	git_repository *repo = state->repo;
+	struct tag_options *opts = state->opts;
+	git_signature *tagger;
+	git_oid oid;
+	git_object *target;
+
+	check(!opts->tag_name, "Name required");
+	check(!opts->message, "Message required");
+
+	if (!opts->target) opts->target = "HEAD";
+
+	check_lg2(git_revparse_single(&target, repo, opts->target),
+			"Unable to resolve spec", opts->target);
+
+	check_lg2(git_signature_default(&tagger, repo),
+			"Unable to create signature", NULL);
+
+	check_lg2(git_tag_create(&oid, repo, opts->tag_name,
+				target, tagger, opts->message, opts->force), "Unable to create tag", NULL);
+
+	git_object_free(target);
+	git_signature_free(tagger);
+}
+
+static void print_usage(void)
+{
+	fprintf(stderr, "usage: see `git help tag`\n");
+	exit(1);
+}
+
+/** Parse command line arguments and choose action to run when done */
+static void parse_options(tag_action *action, struct tag_options *opts, int argc, char **argv)
+{
+	args_info args = ARGS_INFO_INIT;
+	*action = &action_list_tags;
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		const char *curr = argv[args.pos];
+
+		if (curr[0] != '-') {
+			if (!opts->tag_name)
+				opts->tag_name = curr;
+			else if (!opts->target)
+				opts->target = curr;
+			else
+				print_usage();
+
+			if (*action != &action_create_tag)
+				*action = &action_create_lighweight_tag;
+		} else if (!strcmp(curr, "-n")) {
+			opts->num_lines = 1;
+			*action = &action_list_tags;
+		} else if (!strcmp(curr, "-a")) {
+			*action = &action_create_tag;
+		} else if (!strcmp(curr, "-f")) {
+			opts->force = 1;
+		} else if (match_int_arg(&opts->num_lines, &args, "-n", 0)) {
+			*action = &action_list_tags;
+		} else if (match_str_arg(&opts->pattern, &args, "-l")) {
+			*action = &action_list_tags;
+		} else if (match_str_arg(&opts->tag_name, &args, "-d")) {
+			*action = &action_delete_tag;
+		} else if (match_str_arg(&opts->message, &args, "-m")) {
+			*action = &action_create_tag;
+		}
+	}
+}
+
+/** Initialize tag_options struct */
+static void tag_options_init(struct tag_options *opts)
+{
+	memset(opts, 0, sizeof(*opts));
+
+	opts->message   = NULL;
+	opts->pattern   = NULL;
+	opts->tag_name  = NULL;
+	opts->target    = NULL;
+	opts->num_lines = 0;
+	opts->force     = 0;
+}
+
+int lg2_tag(git_repository *repo, int argc, char **argv)
+{
+	struct tag_options opts;
+	tag_action action;
+	tag_state state;
+
+	tag_options_init(&opts);
+	parse_options(&action, &opts, argc, argv);
+
+	state.repo = repo;
+	state.opts = &opts;
+	action(&state);
+
+	return 0;
+}