install gulp to process code

node_modules/gulp-cli/lib/shared/register-exports.js

@@ -0,0 +1,21 @@
+'use strict';
+
+function registerExports(gulpInst, tasks) {
+  var taskNames = Object.keys(tasks);
+
+  if (taskNames.length) {
+    taskNames.forEach(register);
+  }
+
+  function register(taskName) {
+    var task = tasks[taskName];
+
+    if (typeof task !== 'function') {
+      return;
+    }
+
+    gulpInst.task(task.displayName || taskName, task);
+  }
+}
+
+module.exports = registerExports;