text: const webpack = require('webpack');
  const HtmlWebpackPlugin = require('html-webpack-plugin');
  const ExtractTextPlugin = require('extract-text-webpack-plugin');
  const merge = require('webpack-merge');
  const webpackBaseConfig = require('./webpack.base.config.js');
  const fs = require('fs');
  
  fs.open('./src/config/env.js', 'w', function(err, fd) {
      const buf = 'export default "production";';
      fs.write(fd, buf, 0, buf.length, 0, function(err, written, buffer) {});
  });
  
  module.exports = merge(webpackBaseConfig, {
      output: {
          publicPath: '/b/dist/',
          filename: '[name].[hash].js',
          chunkFilename: '[name].[hash].chunk.js'
      },
      plugins: [
          new ExtractTextPlugin({
              filename: '[name].[hash].css',
              allChunks: true
          }),
          new webpack.optimize.CommonsChunkPlugin({
              name: 'vendors',
              filename: 'vendors.[hash].js'
          }),
          new webpack.DefinePlugin({
              'process.env': {
                  NODE_ENV: '"production"'
              }
          }),
          new webpack.optimize.UglifyJsPlugin({
              compress: {
                  warnings: false
              }
          }),
          new HtmlWebpackPlugin({
              filename: '../index_prod.html',
              template: './src/template/index.ejs',
              inject: false
          }),
          new webpack.DefinePlugin({
              _environment: JSON.stringify('dev')
          })
      ]
  });
  