install gulp to process code

node_modules/global-modules/index.js

@@ -0,0 +1,31 @@
+/*!
+ * global-modules <https://github.com/jonschlinkert/global-modules>
+ *
+ * Copyright (c) 2015-2017 Jon Schlinkert.
+ * Licensed under the MIT license.
+ */
+
+'use strict';
+
+var path = require('path');
+var prefix = require('global-prefix');
+var isWindows = require('is-windows');
+var gm;
+
+function getPath() {
+  if (isWindows()) {
+    return path.resolve(prefix, 'node_modules');
+  }
+  return path.resolve(prefix, 'lib/node_modules');
+}
+
+/**
+ * Expose `global-modules` path
+ */
+
+Object.defineProperty(module, 'exports', {
+  enumerable: true,
+  get: function() {
+    return gm || (gm = getPath());
+  }
+});