Sublime thing for grunting on save

gistfile1.py

import sublime, sublime_plugin
import os
import tempfile
 
class HandlebarsOnSave(sublime_plugin.EventListener):
    def on_post_save(self, view):
        folder_name, file_name = os.path.split(view.file_name())
        extension = file_name[-3:]
        if extension == 'hbs':
            view.window().run_command('exec', { 'cmd': 'export PATH=/usr/local/bin:$PATH; /usr/local/share/npm/bin/grunt', 'shell': True, 'quiet': True})