vue.jpg

昨天项目上线，需要多个环境，折腾过程记录下。

一般来说，开发中有三个环境，开发环境、测试环境、线上环境。vue脚手架提供了两个环境，开发环境（dev）和线上环境（build）。这时候的处理方式是开发环境使用vue中的开发环境（dev）,测试环境和线上环境都使用vue中的线上环境（build）,但是 但是 但是，这种情况只适用于测试环境和线上环境是一模一样的时候，有些实际情况中，线上环境和测试环境不一样，比如线上的部署可能是分开部署到多个服务器，但是测试就一个服务器。这个时候，就需要再添加一个环境。

我不知道上面能不能表述清楚，反正我读起来都有点模糊。原谅我......

在打算添加一个环境的时候，没有搜索到相关的教程，看来我的面向搜索编程功力还欠火候...,然后懵懵懂懂看了npm run build的构建过程，复制粘贴修改大法成功啦。

开始

package.json

首先修改package.json,在scripts节点中添加一个脚本指令，我添加的是testing的那个指令，刚开始我添加的test,结果里面已经存在一个了:worried:

.....
.....
 "scripts": {
    "dev": "node build/dev-server.js",
    "start": "npm run dev",
    "build": "node build/build.js",
    "testing": "node build/testing.js",
    "unit": "cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run",
    "e2e": "node test/e2e/runner.js",
    "test": "npm run unit && npm run e2e"
  }
.....
.....

testing.js

在build文件夹中新建testing.js文件,配置如下

'use strict'
require('./check-versions')()

process.env.NODE_ENV = 'testing'

const ora = require('ora')
const rm = require('rimraf')
const path = require('path')
const chalk = require('chalk')
const webpack = require('webpack')
const config = require('../config')
const webpackConfig = require('./webpack.testing.conf')

const spinner = ora('building for testing...')
spinner.start()

rm(path.join(config.testing.assetsRoot, config.testing.assetsSubDirectory), err => {
  if (err) throw err
  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')

    if (stats.hasErrors()) {
      console.log(chalk.red('  testing failed with errors.\n'))
      process.exit(1)
    }

    console.log(chalk.cyan('  testing 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.testing.conf.js

在build文件中，新建webpack.testing.conf.js文件，配置如下:

'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 env = config.testing.env

const webpackConfig = merge(baseWebpackConfig, {
  module: {
    rules: utils.styleLoaders({
      sourceMap: config.testing.testingSourceMap,
      extract: true
    })
  },
  devtool: config.testing.testingSourceMap ? '#source-map' : false,
  output: {
    path: config.testing.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
    }),
    // UglifyJs do not support ES6+, you can also use babel-minify for better treeshaking: https://github.com/babel/minify
    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({
      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.testing.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 vender modules does not change
    new webpack.HashedModuleIdsPlugin(),
    // split vendor js into its own file
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor',
      minChunks: function (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',
      chunks: ['vendor']
    }),
    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.testing.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]
})

if (config.testing.testingGzip) {
  const CompressionWebpackPlugin = require('compression-webpack-plugin')

  webpackConfig.plugins.push(
    new CompressionWebpackPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: new RegExp(
        '\\.(' +
        config.testing.testingGzipExtensions.join('|') +
        ')$'
      ),
      threshold: 10240,
      minRatio: 0.8
    })
  )
}

if (config.testing.bundleAnalyzerReport) {
  const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
  webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}

module.exports = webpackConfig

utils.js

在build文件夹中，修改utils.js文件，修改有两处，修改如下：

.....
.....
exports.assetsPath = function (_path) {
  let assetsSubDirectory = ''

  if (process.env.NODE_ENV === 'production') {
    assetsSubDirectory = config.build.assetsSubDirectory
  } else if (process.env.NODE_ENV === 'testing') {
    assetsSubDirectory = config.testing.assetsSubDirectory
  } else {
    assetsSubDirectory = config.dev.assetsSubDirectory
  }
  return path.posix.join(assetsSubDirectory, _path)
}

exports.cssLoaders = function (options) {
  options = options || {}

  const cssLoader = {
    loader: 'css-loader',
    options: {
      minimize: process.env.NODE_ENV === ('production'||'testing'),
      sourceMap: options.sourceMap
    }
  }

 ....
 ....

webpack.base.conf.js

在build文件夹中修改webpack.base.conf.js，修改就是添加了一个getPath方法和使用这个方法，修改如下：

....
....
function getPath(env) {

  if (env === "production") {

    return config.build.assetsPublicPath
  } else if (env === "testing") {
    return config.testing.assetsPublicPath
  } else {
    return config.dev.assetsPublicPath
  }
}

module.exports = {
  entry: {
    app: './src/main.js'
  },
  output: {
    path: config.build.assetsRoot,
    filename: '[name].js',
    publicPath: getPath(process.env.NODE_ENV)
  },
......
.....

vue-loader.conf.js

在build文件夹中修改vue-loader.conf.js，修改就是添加了一个getSourchMap方法和使用这个方法,还有一个这个extract也要改下，修改如下：

....
....
function getSourchMap(env) {
  if (env === "production") {

    return config.build.productionSourceMap
  } else if (env === "testing") {
    return config.testing.testingSourceMap
  } else {
    return config.dev.cssSourceMap
  }
}

module.exports = {
  loaders: utils.cssLoaders({
    sourceMap: getSourchMap(process.env.NODE_ENV),
    extract: process.env.NODE_ENV === ('production'||'testing')
  }),
  transformToRequire: {
    video: 'src',
    source: 'src',
    img: 'src',
    image: 'xlink:href'
  }
}
....
....

testing.env.js

在config文件中，新建testing.env.js文件，配置如下:

'use strict'
module.exports = {
  NODE_ENV: '"testing"',
  .....
  .....
}

index.js

在config文件中，修改index.js文件，添加testing节点，修改如下:

....
.....
 testing: {
    env: require('./testing.env'),
    index: path.resolve(__dirname, '../dist/index.html'),
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: '',
    assetsPublicPath: '/',
    testingSourceMap: true,
    // 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
    testingGzip: false,
    testingGzipExtensions: ['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
  }
....
....

以上就是需要修改的内容，执行以下命令即可查看打包结果

npm run testing

不出意外，会生成一个dist的目录

以上就是本文的所有内容，感觉还是有些麻烦，如果有更好的方法，欢迎交流。