webpack4 target:“electron-renderer“ 打包加速配置

背景

昨天写得一篇Electron-vue asar 局部打包优化处理方案——绕开每次npm run build 超级慢的打包问题-CSDN博客文章浏览阅读754次，点赞19次，收藏11次。因为组员对于 Electron 打包过程存在比较迷糊的状态，且自己也没主动探索 Electron-vue 打包细节，导致每次打包过程都消耗 5-6 分钟的时间，在需要测试生产打包时，极其浪费时间，为此针对 Electron-vue 打包的几个环节进行拆解，来减少打包时间，提高开发效率。https://blog.csdn.net/wangsenling/article/details/142364579

打包超级慢的原因不是最终electron-builder环节的问题，而是webpack打包渲染进程的问题，今天经过与ChatGPT一起优化，终于把速度降了大概5倍左右，直接让文件打包速度快了很多。

具体配置

1. 主要是多进程处理，这里追加了4个worker，自己的cpu核心有几个可以配置几个，这个主要加速点

2. 去掉了原来的一个没有用的plugin

3. 增加了缓存机制

'use strict'

process.env.BABEL_ENV = 'renderer'

const path = require('path')
const {dependencies} = require('../package.json')
const webpack = require('webpack')

const CopyWebpackPlugin = require('copy-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const {VueLoaderPlugin} = require('vue-loader')
const TerserPlugin = require('terser-webpack-plugin');

/**
 * List of node_modules to include in webpack bundle
 *
 * Required for specific packages like Vue UI libraries
 * that provide pure *.vue files that need compiling
 * https://simulatedgreg.gitbooks.io/electron-vue/content/en/webpack-configurations.html#white-listing-externals
 */
let whiteListedModules = ['vue', 'element-ui']

let rendererConfig = {
    // 添加以下一行，设置 mode
    mode: process.env.NODE_ENV === 'production' ? 'production' : 'development',
    devtool: process.env.NODE_ENV === 'production' ? false : '#cheap-module-eval-source-map',
    entry: {
        renderer: path.join(__dirname, '../src/renderer/main.js'),
    },
    externals: [
        ...Object.keys(dependencies || {}).filter(
            (d) => !whiteListedModules.includes(d)
        ),
    ],
    module: {
        rules: [
            {
                test: /\.scss$/,
                use: ['vue-style-loader', 'css-loader', 'sass-loader'],
            },
            {
                test: /\.sass$/,
                use: ['vue-style-loader', 'css-loader', 'sass-loader?indentedSyntax'],
            },
            {
                test: /\.less$/,
                use: ['vue-style-loader', 'css-loader', 'less-loader'],
            },
            {
                test: /\.css$/,
                use: ['vue-style-loader', 'css-loader'],
            },
            {
                test: /\.html$/,
                use: 'vue-html-loader',
            },
            {
                test: /\.js$/,
                use: [
                    {
                        loader: 'thread-loader',
                        options: {
                            workers: 4, // 设置 worker 数量
                        },
                    }, {
                        loader: 'babel-loader',
                        options: {
                            cacheDirectory: true
                        }
                    }
                ],
                exclude: /node_modules/,
            },
            {
                test: /\.node$/,
                use: 'node-loader',
            },
            {
                test: /\.vue$/,
                use: {
                    loader: 'vue-loader',
                    options: {
                        extractCSS: process.env.NODE_ENV === 'production',
                        loaders: {
                            sass: 'vue-style-loader!css-loader!sass-loader?indentedSyntax=1',
                            scss: 'vue-style-loader!css-loader!sass-loader',
                            less: 'vue-style-loader!css-loader!less-loader',
                        },
                    },
                },
            },
            {
                test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
                use: {
                    loader: 'url-loader',
                    query: {
                        limit: 10000,
                        name: 'imgs/[name]--[folder].[ext]',
                    },
                },
            },
            {
                test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
                loader: 'url-loader',
                options: {
                    limit: 10000,
                    name: 'media/[name]--[folder].[ext]',
                },
            },
            {
                test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
                use: {
                    loader: 'url-loader',
                    query: {
                        limit: 10000,
                        name: 'fonts/[name]--[folder].[ext]',
                    },
                },
            },
        ],
    },
    node: {
        __dirname: process.env.NODE_ENV !== 'production',
        __filename: process.env.NODE_ENV !== 'production',
    },
    plugins: [
        new VueLoaderPlugin(),
        new MiniCssExtractPlugin({filename: 'styles.css'}),
        new HtmlWebpackPlugin({
            filename: 'index.html',
            template: path.resolve(__dirname, '../src/index.ejs'),
            templateParameters(compilation, assets, options) {
                return {
                    compilation: compilation,
                    webpack: compilation.getStats().toJson(),
                    webpackConfig: compilation.options,
                    htmlWebpackPlugin: {
                        files: assets,
                        options: options,
                    },
                    process,
                }
            },
            minify: {
                collapseWhitespace: true,
                removeAttributeQuotes: true,
                removeComments: true,
            },
            nodeModules:
                process.env.NODE_ENV !== 'production'
                    ? path.resolve(__dirname, '../node_modules')
                    : false,
        }),
        new webpack.NoEmitOnErrorsPlugin(),
    ],
    output: {
        filename: '[name].js',
        chunkFilename: "cities/[name].js",
        libraryTarget: 'commonjs2',
        path: path.join(__dirname, '../dist/electron'),
    },
    resolve: {
        alias: {
            '@': path.join(__dirname, '../src/renderer'),
            vue$: 'vue/dist/vue.esm.js',
        },
        extensions: ['.js', '.vue', '.json', '.css', '.node'],
    },
    optimization: {
        minimize: true,
        minimizer: [
            new TerserPlugin({
                parallel: true, // 开启多线程压缩
                cache: true,
                terserOptions: {
                    // 在这里添加 Terser 的配置选项
                    compress: {
                        drop_console: true, // 例如，移除 console.log
                    },
                },
            }),
        ],
    },
    target: 'electron-renderer',
}

/**
 * Adjust rendererConfig for development settings
 */
if (process.env.NODE_ENV !== 'production') {
    rendererConfig.plugins.push(
        new webpack.HotModuleReplacementPlugin(),
        new webpack.DefinePlugin({
            __static: `"${path.join(__dirname, '../static').replace(/\\/g, '\\\\')}"`,
        })
    )
}

/**
 * Adjust rendererConfig for production settings
 */
if (process.env.NODE_ENV === 'production') {
    rendererConfig.devtool = ''

    rendererConfig.plugins.push(
        new CopyWebpackPlugin([
            {
                from: path.join(__dirname, '../static'),
                to: path.join(__dirname, '../dist/electron/static'),
                ignore: ['.*'],
            },
        ]),
        new webpack.DefinePlugin({
            'process.env.NODE_ENV': '"production"',
        })
    )
}

module.exports = rendererConfig