text: var path = require('path')
  var config = require('../config')
  var utils = require('./utils')
  var webpack = require('webpack')
  var merge = require('webpack-merge')
  var baseWebpackConfig = require('./webpack.package.conf')
  var ExtractTextPlugin = require('extract-text-webpack-plugin')
  var PreloadWebpackPlugin = require('preload-webpack-plugin')
  var env = process.env.NODE_ENV === 'testing'
    ? require('../config/test.env')
    : config.build.env
  
  var webpackConfig = merge(baseWebpackConfig, {
    module: {
      loaders: utils.styleLoaders({ sourceMap: config.build.productionSourceMap, extract: true })
    },
    devtool: config.build.productionSourceMap ? '#source-map' : false,
    output: {
      path: config.build.assetsRoot,
      filename: '[name].js',
    },
    vue: {
      loaders: utils.cssLoaders({
        sourceMap: config.build.productionSourceMap,
        extract: true
      })
    },
    plugins: [
      // http://vuejs.github.io/vue-loader/en/workflow/production.html
      new webpack.DefinePlugin({
        'process.env': env
      }),
      // new webpack.optimize.UglifyJsPlugin({
      //   compress: {
      //     warnings: false
      //   }
      // }),
      new PreloadWebpackPlugin({
          rel: 'preload',
          as: 'font',
          include: 'allAssets',
          fileWhitelist: [/\.(woff2?|eot|ttf|otf)(\?.*)?$/i],
      }),
      new webpack.optimize.OccurenceOrderPlugin(),
      // extract css into its own file
      new ExtractTextPlugin(utils.assetsPath('css/[name].css')),
      // split vendor js into its own file
      // new webpack.optimize.CommonsChunkPlugin({
      //   name: 'vendor',
      //   minChunks: function (module, count) {
      //     // any required modules inside node_modules are extracted to vendor
      //     return (
      //       module.resource &&
      //       /\.js$/.test(module.resource) &&
      //       module.resource.indexOf(
      //         path.join(__dirname, '../node_modules')
      //       ) === 0
      //     )
      //   }
      // }),
      // extract webpack runtime and module manifest to its own file in order to
      // prevent vendor hash from being updated whenever app bundle is updated
      // new webpack.optimize.CommonsChunkPlugin({
      //   name: 'manifest',
      //   chunks: ['vendor']
      // })
    ]
  })
  
  if (config.build.productionGzip) {
    var CompressionWebpackPlugin = require('compression-webpack-plugin')
  
    webpackConfig.plugins.push(
      new CompressionWebpackPlugin({
        asset: '[path].gz[query]',
        algorithm: 'gzip',
        test: new RegExp(
          '\\.(' +
          config.build.productionGzipExtensions.join('|') +
          ')$'
        ),
        threshold: 10240,
        minRatio: 0.8
      })
    )
  }
  
  module.exports = webpackConfig
  