install gulp to process code

node_modules/expand-tilde/index.js

@@ -0,0 +1,22 @@
+/*!
+ * expand-tilde <https://github.com/jonschlinkert/expand-tilde>
+ *
+ * Copyright (c) 2015 Jon Schlinkert.
+ * Licensed under the MIT license.
+ */
+
+var homedir = require('homedir-polyfill');
+var path = require('path');
+
+module.exports = function expandTilde(filepath) {
+  var home = homedir();
+
+  if (filepath.charCodeAt(0) === 126 /* ~ */) {
+    if (filepath.charCodeAt(1) === 43 /* + */) {
+      return path.join(process.cwd(), filepath.slice(2));
+    }
+    return home ? path.join(home, filepath.slice(1)) : filepath;
+  }
+
+  return filepath;
+};