Initial commit

node_modules/licia/getPort.js

@@ -0,0 +1,32 @@
+const toArr = require('./toArr');
+
+const net = require('net');
+
+exports = function(ports, host) {
+    ports = toArr(ports);
+    ports.push(0);
+
+    return ports.reduce((seq, port) => {
+        return seq.catch(() => isAvailable(port, host));
+    }, Promise.reject());
+};
+
+function isAvailable(port, host) {
+    return new Promise((resolve, reject) => {
+        const server = net.createServer();
+
+        server.unref();
+        server.on('error', reject);
+        const options = {};
+        options.port = port;
+        if (host) options.host = host;
+        server.listen(options, () => {
+            const { port } = server.address();
+            server.close(() => {
+                resolve(port);
+            });
+        });
+    });
+}
+
+module.exports = exports;