shared-logs / web-app

'use strict'

const path = require('path')

const utils = require('./utils')

const webpack = require('webpack')

const config = require('../config')

const merge = require('webpack-merge')

const baseWebpackConfig = require('./webpack.base.conf')

const CopyWebpackPlugin = require('copy-webpack-plugin')

const HtmlWebpackPlugin = require('html-webpack-plugin')

const ExtractTextPlugin = require('extract-text-webpack-plugin')

const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')

const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

const env = require('../config/prod.env')

const webpackConfig = merge(baseWebpackConfig, {

  module: {

    rules: utils.styleLoaders({

      sourceMap: config.build.productionSourceMap,

      extract: true,

      usePostCSS: true

    })

  },

  devtool: config.build.productionSourceMap ? config.build.devtool : 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

    }),

    new UglifyJsPlugin({

      uglifyOptions: {

        compress: {

          warnings: false

        }

      },

      sourceMap: config.build.productionSourceMap,

      parallel: true

    }),

    // extract css into its own file

    new ExtractTextPlugin({

      filename: utils.assetsPath('css/[name].[contenthash].css'),

      // Setting the following option to `false` will not extract CSS from codesplit chunks.

      // Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.

      // It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`, 

      // increasing file size: https://github.com/vuejs-templates/webpack/issues/1110

      allChunks: true,

    }),

    // Compress extracted CSS. We are using this plugin so that possible

    // duplicated CSS from different components can be deduped.

    new OptimizeCSSPlugin({

      cssProcessorOptions: config.build.productionSourceMap

        ? { safe: true, map: { inline: false } }

        : { 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: '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'

    }),

    // keep module.id stable when vendor modules does not change

    new webpack.HashedModuleIdsPlugin(),

    // enable scope hoisting

    new webpack.optimize.ModuleConcatenationPlugin(),

    // split vendor js into its own file

    new webpack.optimize.CommonsChunkPlugin({

      name: 'vendor',

      minChunks (module) {

        // 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',

      minChunks: Infinity

    }),

    // This instance extracts shared chunks from code splitted chunks and bundles them

    // in a separate chunk, similar to the vendor chunk

    // see: https://webpack.js.org/plugins/commons-chunk-plugin/#extra-async-commons-chunk

    new webpack.optimize.CommonsChunkPlugin({

      name: 'app',

      async: 'vendor-async',

      children: true,

      minChunks: 3

    }),

    // copy custom static assets

    new CopyWebpackPlugin([

      {

        from: path.resolve(__dirname, '../static'),

        to: config.build.assetsSubDirectory,

        ignore: ['.*']

      }

    ])

  ]

})

if (config.build.productionGzip) {

  const 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) {

  const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin

  webpackConfig.plugins.push(new BundleAnalyzerPlugin())

}

module.exports = webpackConfig