text: var path = require('path');
  var utils = require('./utils');
  var webpack = require('webpack');
  var config = require('../config');
  var merge = require('webpack-merge');
  var baseWebpackConfig = require('./webpack.base.conf');
  var CopyWebpackPlugin = require('copy-webpack-plugin');
  var HtmlWebpackPlugin = require('html-webpack-plugin');
  var ExtractTextPlugin = require('extract-text-webpack-plugin');
  var OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin');
  
  var env = config.build.env;
  
  var webpackConfig = merge(baseWebpackConfig, {
      module: {
          rules: utils.styleLoaders({
              sourceMap: config.build.productionSourceMap,
              extract: true
          })
      },
      devtool: config.build.productionSourceMap ? '#source-map' : false,
      output: {
          path: config.build.assetsRoot,
          filename: utils.assetsPath('js/[name].[chunkhash].js'),
          chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
      },
      plugins: [
          // http://vuejs.github.io/vue-loader/en/workflow/production.html
          new webpack.DefinePlugin({
              'process.env': env,
              '__witnesses__': JSON.stringify(config.build.witnesses),
              'STA_SERVICE': JSON.stringify(config.build.STA_SERVICE)
          }),
          new webpack.optimize.UglifyJsPlugin({
              compress: {
                  warnings: false
              },
              sourceMap: true
          }),
          // extract css into its own file
          new ExtractTextPlugin({
              filename: utils.assetsPath('css/[name].[contenthash].css')
          }),
          // Compress extracted CSS. We are using this plugin so that possible
          // duplicated CSS from different components can be deduped.
          new OptimizeCSSPlugin({
              cssProcessor: require('cssnano'),
              cssProcessorOptions: {
                  safe: true
              }
          }),
          // generate dist index.html with correct asset hash for caching.
          // you can customize output by editing /index.html
          // see https://github.com/ampedandwired/html-webpack-plugin
          new HtmlWebpackPlugin({
              filename: config.build.index,
              template: './src/index.html',
              inject: true,
              minify: {
                  removeComments: true,
                  collapseWhitespace: true,
                  removeAttributeQuotes: true
                  // more options:
                  // https://github.com/kangax/html-minifier#options-quick-reference
              },
              // necessary to consistently work with multiple chunks via CommonsChunkPlugin
              chunksSortMode: 'dependency'
          }),
          // 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']
          }),
          // copy custom static assets
          new CopyWebpackPlugin([
              {
                  from: path.resolve(__dirname, '../static'),
                  to: config.build.assetsSubDirectory,
                  ignore: ['.*']
              }
          ])
      ]
  });
  
  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
          })
      );
  }
  
  if (config.build.bundleAnalyzerReport) {
      var BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
      webpackConfig.plugins.push(new BundleAnalyzerPlugin());
  }
  
  module.exports = webpackConfig;
  