增加了git功能，但是还未完善

node_modules/sha.js/bin.js

@@ -0,0 +1,44 @@
+#! /usr/bin/env node
+
+'use strict';
+
+var createHash = require('./browserify');
+var argv = process.argv.slice(2);
+
+function pipe(algorithm, s) {
+	var start = Date.now();
+	var hash = createHash(algorithm || 'sha1');
+
+	s.on('data', function (data) {
+		hash.update(data);
+	});
+
+	s.on('end', function () {
+		if (process.env.DEBUG) {
+			console.log(hash.digest('hex'), Date.now() - start);
+		} else {
+			console.log(hash.digest('hex'));
+		}
+	});
+}
+
+function usage() {
+	console.error('sha.js [algorithm=sha1] [filename] # hash filename with algorithm');
+	console.error('input | sha.js [algorithm=sha1]    # hash stdin with algorithm');
+	console.error('sha.js --help                      # display this message');
+}
+
+if (!process.stdin.isTTY) {
+	pipe(argv[0], process.stdin);
+} else if (argv.length) {
+	if ((/--help|-h/).test(argv[0])) {
+		usage();
+	} else {
+		var filename = argv.pop();
+		var algorithm = argv.pop();
+		// eslint-disable-next-line global-require
+		pipe(algorithm, require('fs').createReadStream(filename));
+	}
+} else {
+	usage();
+}