install gulp to process code

node_modules/vinyl-fs/lib/dest/options.js

@@ -0,0 +1,47 @@
+'use strict';
+
+var DEFAULT_ENCODING = require('../constants').DEFAULT_ENCODING;
+
+var config = {
+  cwd: {
+    type: 'string',
+    default: process.cwd,
+  },
+  mode: {
+    type: 'number',
+    default: function (file) {
+      return file.stat ? file.stat.mode : null;
+    },
+  },
+  dirMode: {
+    type: 'number',
+  },
+  overwrite: {
+    type: 'boolean',
+    default: true,
+  },
+  append: {
+    type: 'boolean',
+    default: false,
+  },
+  encoding: {
+    type: ['string', 'boolean'],
+    default: DEFAULT_ENCODING,
+  },
+  sourcemaps: {
+    type: ['string', 'boolean'],
+    default: false,
+  },
+  // Symlink options
+  relativeSymlinks: {
+    type: 'boolean',
+    default: false,
+  },
+  // This option is ignored on non-Windows platforms
+  useJunctions: {
+    type: 'boolean',
+    default: true,
+  },
+};
+
+module.exports = config;