text: // https://github.com/shelljs/shelljs
  require('./check-versions')()
  process.env.NODE_ENV = 'production'
  var ora = require('ora')
  var path = require('path')
  var chalk = require('chalk')
  var shell = require('shelljs')
  var webpack = require('webpack')
  var config = require('../config')
  var webpackConfig = require('./webpack.prod.conf')
  var spinner = ora('building for production...')
  spinner.start()
  var assetsPath = path.join(config.build.assetsRoot, config.build.assetsSubDirectory)
  shell.rm('-rf', assetsPath)
  shell.mkdir('-p', assetsPath)
  shell.config.silent = true
  shell.cp('-R', 'static/*', assetsPath)
  shell.config.silent = false
  webpack(webpackConfig, function (err, stats) {
      spinner.stop()
      if (err) throw err
      process.stdout.write(stats.toString({
          colors: true,
          modules: false,
          children: false,
          chunks: false,
          chunkModules: false
      }) + '\n\n')
      console.log(chalk.cyan('  Build complete.\n'))
      console.log(chalk.yellow(
          '  Tip: built files are meant to be served over an HTTP server.\n' +
          '  Opening index.html over file:// won\'t work.\n'
      ))
  })
  