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詳解Webpack多環境代碼打包的方法

發布時間:2020-08-25 01:52:01 來源:腳本之家 閱讀:239 作者:$坐看云起$ 欄目:web開發

在實際開發中常遇到,代碼在

在package.json文件的scripts中,會提供開發環境與生產環境兩個命令。但是實際使用中會遇見 測試版與正式版代碼相繼發布的情況,這樣反復更改服務器地址,偶爾忘記更改url會給工作帶來很多不必要的麻煩(當然也會對你的工作能力產生質疑)。這樣就需要在生產環境中配置測試版本打包命令與正式版本打包命令。

1、Package.json 文件中 增加命令行命令,并指定路徑。

"scripts": {
  "dev": "node build/dev-server.js",
  "build": "node build/build.js",      //正式環境打包命令
  "fev": "node build/test.js"       //測試環境打包命令
 },

2、在build文件中添加相應文件

詳解Webpack多環境代碼打包的方法

test.js

// https://github.com/shelljs/shelljs
require('./check-versions')()

process.env.NODE_ENV = 'fev'

var ora = require('ora')
var path = require('path')
var chalk = require('chalk')
var shell = require('shelljs')
var webpack = require('webpack')
var config = require('../config')
var webpackConfig = require('./webpack.test.conf')

var spinner = ora('building for fev...')
spinner.start()

var assetsPath = path.join(config.fev.assetsRoot, config.fev.assetsSubDirectory)
shell.rm('-rf', assetsPath)
shell.mkdir('-p', assetsPath)
shell.config.silent = true
shell.cp('-R', 'static/*', assetsPath)
shell.config.silent = false

webpack(webpackConfig, function (err, stats) {
 spinner.stop()
 if (err) throw err
 process.stdout.write(stats.toString({
  colors: true,
  modules: false,
  children: false,
  chunks: false,
  chunkModules: false
 }) + '\n\n')

 console.log(chalk.cyan(' Build complete.\n'))
 console.log(chalk.yellow(
  ' Tip: built files are meant to be served over an HTTP server.\n' +
  ' Opening index.html over file:// won\'t work.\n'
 ))
})

webpack.test.conf.js

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 HtmlWebpackPlugin = require('html-webpack-plugin')
var ExtractTextPlugin = require('extract-text-webpack-plugin')
var env = config.fev.env

var webpackConfig = merge(baseWebpackConfig, {
 module: {
  rules: utils.styleLoaders({
   sourceMap: config.fev.productionSourceMap,
   extract: true
  })
 },
 devtool: config.fev.productionSourceMap ? '#source-map' : false,
 output: {
  path: config.fev.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 webpack.optimize.UglifyJsPlugin({
   compress: {
    warnings: false,
    drop_console: true
   },
   
   sourceMap: true
  }),
  // extract css into its own file
  new ExtractTextPlugin({
   filename: utils.assetsPath('css/[name].[contenthash].css')
  }),
  // 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.fev.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'
  }),
  // 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.fev.productionGzip) {
 var CompressionWebpackPlugin = require('compression-webpack-plugin')

 webpackConfig.plugins.push(
  new CompressionWebpackPlugin({
   asset: '[path].gz[query]',
   algorithm: 'gzip',
   test: new RegExp(
    '\\.(' +
    config.fev.productionGzipExtensions.join('|') +
    ')$'
   ),
   threshold: 10240,
   minRatio: 0.8
  })
 )
}
if (config.fev.bundleAnalyzerReport) {
 var BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
 webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}
module.exports = webpackConfig

3、在config文件中增加環境變量配置

詳解Webpack多環境代碼打包的方法

test.env.js 增加環境變量

module.exports = {
 NODE_ENV: '"fev"'
}

index.js

// see http://vuejs-templates.github.io/webpack for documentation.
var path = require('path')

module.exports = {
  build: {
    env: require('./prod.env'),
    index: path.resolve(__dirname, '../dist/index.html'),
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    // assetsPublicPath: './',
    assetsPublicPath: '',    //公共資源路徑
    productionSourceMap: false,
    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  },
  fev: {
    env: require('./test.env'),
    index: path.resolve(__dirname, '../dist/index.html'),
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: './',  //公共資源路徑
    productionSourceMap: false,
    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  },
  test: {
    env: require('./test.env'),
    index: path.resolve(__dirname, '../dist/index.html'),
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: './',
    productionSourceMap: false,
    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  },
  dev: {
    env: require('./dev.env'),
    port: 8081,
    autoOpenBrowser: true,
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {
      // '/api':{
      //   target:'http://jsonplaceholder.typicode.com',
      //   changeOrigin:true,
      //   pathRewrite:{
      //     '/api':''
      //   }
      // }
    },
    // CSS Sourcemaps off by default because relative paths are "buggy"
    // with this option, according to the CSS-Loader README
    // (https://github.com/webpack/css-loader#sourcemaps)
    // In our experience, they generally work as expected,
    // just be aware of this issue when enabling this option.
    cssSourceMap: false
  }
}

4、在main.js文件中在增加環境變量判斷

if(process.env.NODE_ENV == 'production'){
  defines.html_url = '正式環境URL';
}
if(process.env.NODE_ENV == 'development'){
  defines.html_url = '開發環境URL';
} 
if(process.env.NODE_ENV == 'fev'){ 
  defines.html_url = '測試環境URL'; 
}

5、如果公共資源路徑,在不同環境中需要更改。在webpack.base.conf.js 中配置打包文件輸出的公共路徑。

var path = require('path')
var utils = require('./utils')
var config = require('../config')
var vueLoaderConfig = require('./vue-loader.conf')
//增加文件路徑判斷
var webpack_public_path = '';
 if(process.env.NODE_ENV === 'production'){
  webpack_public_path = config.build.assetsPublicPath;
 }else if(process.env.NODE_ENV === 'fev'){
  webpack_public_path = config.fev.assetsPublicPath;
 }else if(process.env.NODE_ENV === 'dev'){
  webpack_public_path = config.dev.assetsPublicPath;
 }
function resolve (dir) {
 return path.join(__dirname, '..', dir)
}
module.exports = {

 //測試使用
 entry: {
  app: ["promise-polyfill", "./src/main.js"]
 },
 // entry: {
 //  app: './src/main.js'
 // },
 output: {
  path: config.build.assetsRoot,
  filename: '[name].js',
  publicPath: webpack_public_path
  // publicPath: process.env.NODE_ENV === 'production' || process.env.NODE_ENV === 'fev' ? config.build.assetsPublicPath
  //  : config.dev.assetsPublicPath
 },

 resolve: {
  extensions: ['.js', '.vue', '.json'],
  modules: [
   resolve('src'),
   resolve('node_modules'),
  ],
  alias: {
   'vue$': 'vue/dist/vue.common.js',
   'src': resolve('src'),
   'assets': resolve('src/assets'),
   'components': resolve('src/components'),
   'vendor': path.resolve(__dirname, '../src/api'),
   // 'vendor': path.resolve(__dirname, '../src/vendor'),
  }
 },
 module: {
  rules: [
   {
    test: /\.vue$/,
    loader: 'vue-loader'
   },
   {
    test: /\.js$/,
    loader: 'babel-loader',
    include: [resolve('src'), resolve('test')]
   },
   {
    test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
    loader: 'url-loader',
    query: {
     limit: 10000,
     name: utils.assetsPath('img/[name].[hash:7].[ext]')
    }
   },
   {
    test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
    loader: 'url-loader',
    query: {
     limit: 10000,
     name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
    }
   }
  ]
 }
}

以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持億速云。

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