wikijs-fork/dev/webpack/webpack.prod.js

const webpack = require('webpack')
const merge = require('webpack-merge')

const CleanWebpackPlugin = require('clean-webpack-plugin')
const UglifyJSPlugin = require('uglifyjs-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const DuplicatePackageCheckerPlugin = require('duplicate-package-checker-webpack-plugin')

const common = require('./webpack.common.js')

console.info(process.cwd())

module.exports = merge(common, {
  module: {
    rules: []
  },
  plugins: [
    new CleanWebpackPlugin(['assets'], { root: process.cwd() }),
    new UglifyJSPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production')
    }),
    new ExtractTextPlugin('css/bundle.css'),
    new DuplicatePackageCheckerPlugin()
  ]
})