install.js

var async = require("async"),
	child_process = require("child_process"),
	spawn = child_process.spawn,
	path = require("path");

function passthru() {
	var args = Array.prototype.slice.call(arguments);
	var cb = args.splice(-1)[0];
	var cmd = args.splice(0, 1)[0];
	var opts = {};
	if(typeof(args.slice(-1)[0]) === "object") {
		opts = args.splice(-1)[0];
	}
	var child = spawn(cmd, args, opts);

	child.stdout.pipe(process.stdout);
	child.stderr.pipe(process.stderr);
	child.on("exit", cb);
}

function shpassthru() {
	var cmd = 
	passthru.apply(null, ["/bin/sh", "-c"].concat(Array.prototype.slice.call(arguments)));
}

function envpassthru() {
	passthru.apply(null, ["/usr/bin/env"].concat(Array.prototype.slice.call(arguments)));
}

var buildDir = path.join(__dirname, "deps/libgit2/build");
async.series([
	function(cb) {
		console.log("[gitteh] Downloading libgit2 dependency.");
		envpassthru("git", "submodule", "init", cb);
	},
	function(cb) {
		envpassthru("git", "submodule", "update", cb);
	},
	function(cb) {
		console.log("[gitteh] Building libgit2 dependency.");
		envpassthru("mkdir", "-p", buildDir, cb);
	},
	function(cb) {
		envpassthru("cmake", "-DTHREADSAFE=1", "-DBUILD_CLAR=0", "..", {
			cwd: buildDir
		}, cb);
	},
	function(cb) {
		envpassthru("cmake", "--build", ".", {
			cwd: buildDir
		}, cb);
	},
	function(cb) {
		console.log("[gitteh] Building native module.");
		shpassthru("node-gyp configure --debug", cb);
	},
	function(cb) {
		shpassthru("node-gyp build", cb);
	}
], function(err) {
	if(err) process.exit(err);
});