install gulp to process code

node_modules/stream-exhaust/index.js

@@ -0,0 +1,34 @@
+var Writable = require('stream').Writable;
+var inherits = require('util').inherits;
+
+module.exports = resumer;
+
+function resumer(stream) {
+  if (!stream.readable) {
+    return stream;
+  }
+
+  if (stream._read) {
+    stream.pipe(new Sink);
+    return stream;
+  }
+
+  if (typeof stream.resume === 'function') {
+    stream.resume();
+    return stream;
+  }
+
+  return stream;
+}
+
+function Sink() {
+  Writable.call(this, {
+    objectMode: true
+  });
+}
+
+inherits(Sink, Writable);
+
+Sink.prototype._write = function(chunk, encoding, cb) {
+  setImmediate(cb);
+};