install gulp to process code

node_modules/gulp-cli/completion/zsh

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+#!/bin/zsh
+
+# Borrowed from grunt-cli
+# http://gruntjs.com/
+#
+# Copyright (c) 2012 Tyler Kellen, contributors
+# Licensed under the MIT license.
+# https://github.com/gruntjs/grunt/blob/master/LICENSE-MIT
+
+# Usage:
+#
+# To enable zsh <tab> completion for gulp, add the following line (minus the
+# leading #, which is the zsh comment character) to your ~/.zshrc file:
+#
+# eval "$(gulp --completion=zsh)"
+
+# Enable zsh autocompletion.
+function _gulp_completion() {
+  # Grab tasks
+  compls=$(gulp --tasks-simple)
+  completions=(${=compls})
+  compadd -- $completions
+}
+
+compdef _gulp_completion gulp