feat: auto DLL

packages/@vue/cli-service/lib/config/base.js

@@ -102,13 +102,6 @@ module.exports = (api, options) => {
         child_process: 'empty'
       })
 
-    const htmlPath = api.resolve('public/index.html')
-    webpackConfig
-      .plugin('html')
-        .use(require('html-webpack-plugin'), [
-          fs.existsSync(htmlPath) ? { template: htmlPath } : {}
-        ])
-
     // inject preload/prefetch to HTML
     const PreloadPlugin = require('../webpack/PreloadPlugin')
     webpackConfig
@@ -126,6 +119,13 @@ module.exports = (api, options) => {
           include: 'asyncChunks'
         }])
 
+    const htmlPath = api.resolve('public/index.html')
+    webpackConfig
+      .plugin('html')
+        .use(require('html-webpack-plugin'), [
+          fs.existsSync(htmlPath) ? { template: htmlPath } : {}
+        ])
+
     webpackConfig
       .plugin('define')
         .use(require('webpack/lib/DefinePlugin'), [

packages/@vue/cli-service/lib/config/prod.js

@@ -42,95 +42,99 @@ module.exports = (api, options) => {
           ])
 
       // minify JS
+      const UglifyPlugin = require('uglifyjs-webpack-plugin')
+      const uglifyPluginOptions = {
+        uglifyOptions: {
+          compress: {
+            // turn off flags with small gains to speed up minification
+            arrows: false,
+            collapse_vars: false, // 0.3kb
+            comparisons: false,
+            computed_props: false,
+            hoist_funs: false,
+            hoist_props: false,
+            hoist_vars: false,
+            inline: false,
+            loops: false,
+            negate_iife: false,
+            properties: false,
+            reduce_funcs: false,
+            reduce_vars: false,
+            switches: false,
+            toplevel: false,
+            typeofs: false,
+
+            // a few flags with noticable gains/speed ratio
+            // numbers based on out of the box vendor bundle
+            booleans: true, // 0.7kb
+            if_return: true, // 0.4kb
+            sequences: true, // 0.7kb
+            unused: true, // 2.3kb
+
+            // required features to drop conditional branches
+            conditionals: true,
+            dead_code: true,
+            evaluate: true
+          }
+        },
+        sourceMap: options.productionSourceMap,
+        cache: true,
+        parallel: true
+      }
       // disable during tests to speed things up
       if (!process.env.VUE_CLI_TEST) {
         webpackConfig
-          .plugin('uglifyjs')
-            .use(require('uglifyjs-webpack-plugin'), [{
-              uglifyOptions: {
-                compress: {
-                  // turn off flags with small gains to speed up minification
-                  arrows: false,
-                  collapse_vars: false, // 0.3kb
-                  comparisons: false,
-                  computed_props: false,
-                  hoist_funs: false,
-                  hoist_props: false,
-                  hoist_vars: false,
-                  inline: false,
-                  loops: false,
-                  negate_iife: false,
-                  properties: false,
-                  reduce_funcs: false,
-                  reduce_vars: false,
-                  switches: false,
-                  toplevel: false,
-                  typeofs: false,
-
-                  // a few flags with noticable gains/speed ratio
-                  // numbers based on out of the box vendor bundle
-                  booleans: true, // 0.7kb
-                  if_return: true, // 0.4kb
-                  sequences: true, // 0.7kb
-                  unused: true, // 2.3kb
-
-                  // required features to drop conditional branches
-                  conditionals: true,
-                  dead_code: true,
-                  evaluate: true
-                }
-              },
-              sourceMap: options.productionSourceMap,
-              cache: true,
-              parallel: true
-            }])
+          .plugin('uglify')
+            .use(UglifyPlugin, [uglifyPluginOptions])
       }
 
-      // Chunk splits
       const CommonsChunkPlugin = require('webpack/lib/optimize/CommonsChunkPlugin')
 
-      // extract vendor libs into its own chunk for better caching, since they
-      // are more likely to stay the same.
-      webpackConfig
-        .plugin('split-vendor')
-          .use(CommonsChunkPlugin, [{
-            name: 'vendor',
-            minChunks (module) {
-              // any required modules inside node_modules are extracted to vendor
-              return (
-                module.resource &&
-                /\.js$/.test(module.resource) &&
-                module.resource.indexOf(`node_modules`) > -1
-              )
-            }
-          }])
+      // Chunk splits
+      if (!options.dll) {
+        // extract vendor libs into its own chunk for better caching, since they
+        // are more likely to stay the same.
+        webpackConfig
+          .plugin('split-vendor')
+            .use(CommonsChunkPlugin, [{
+              name: 'vendor',
+              minChunks (module) {
+                // any required modules inside node_modules are extracted to vendor
+                return (
+                  module.resource &&
+                  /\.js$/.test(module.resource) &&
+                  module.resource.indexOf(`node_modules`) > -1
+                )
+              }
+            }])
 
-      // extract webpack runtime and module manifest to its own file in order to
-      // prevent vendor hash from being updated whenever app bundle is updated
-      webpackConfig
-        .plugin('split-manifest')
-          .use(CommonsChunkPlugin, [{
-            name: 'manifest',
-            minChunks: Infinity
-          }])
+        // extract webpack runtime and module manifest to its own file in order to
+        // prevent vendor hash from being updated whenever app bundle is updated
+        webpackConfig
+          .plugin('split-manifest')
+            .use(CommonsChunkPlugin, [{
+              name: 'manifest',
+              minChunks: Infinity
+            }])
 
-      // inline the manifest chunk into HTML
-      webpackConfig
-        .plugin('inline-manifest')
-          .use(require('../webpack/InlineSourcePlugin'), [{
-            include: /manifest\..*\.js$/
-          }])
+        // inline the manifest chunk into HTML
+        webpackConfig
+          .plugin('inline-manifest')
+            .use(require('../webpack/InlineSourcePlugin'), [{
+              include: /manifest\..*\.js$/
+            }])
 
-      // since manifest is inlined, don't preload it anymore
-      webpackConfig
-        .plugin('preload')
-          .tap(([options]) => {
-            options.fileBlacklist.push(/manifest\..*\.js$/)
-            return [options]
-          })
+        // since manifest is inlined, don't preload it anymore
+        webpackConfig
+          .plugin('preload')
+            .tap(([options]) => {
+              options.fileBlacklist.push(/manifest\..*\.js$/)
+              return [options]
+            })
+      }
 
-      // This instance extracts shared chunks from code splitted chunks and bundles them
-      // in a separate chunk, similar to the vendor chunk
+      // This CommonsChunkPlugin instance extracts shared chunks from async
+      // 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
       webpackConfig
         .plugin('split-vendor-async')
@@ -141,6 +145,36 @@ module.exports = (api, options) => {
             minChunks: 3
           }])
 
+      // DLL
+      if (options.dll) {
+        const webpack = require('webpack')
+        const resolveClientEnv = require('../util/resolveClientEnv')
+        const dllEntries = Array.isArray(options.dll)
+          ? options.dll
+          : Object.keys(api.service.pkg.dependencies)
+
+        webpackConfig
+          .plugin('dll')
+            .use(require('autodll-webpack-plugin'), [{
+              inject: true,
+              inherit: true,
+              path: 'js/',
+              context: api.resolve('.'),
+              filename: '[name].[hash:8].js',
+              entry: {
+                'vendor': [
+                  ...dllEntries,
+                  'vue-loader/lib/component-normalizer'
+                ]
+              },
+              plugins: [
+                new webpack.DefinePlugin(resolveClientEnv(options.baseUrl)),
+                new UglifyPlugin(uglifyPluginOptions)
+              ]
+            }])
+            .after('preload')
+      }
+
       // copy static assets in public/
       webpackConfig
         .plugin('copy')
@@ -162,8 +196,6 @@ module.exports = (api, options) => {
       //       .before('vue-loader')
       //       .loader('thread-loader')
       //       .options({ name: 'vue' })
-
-      // TODO DLL
     }
   })
 }

packages/@vue/cli-service/lib/options.js

@@ -6,6 +6,10 @@ const schema = createSchema(joi => joi.object({
   compiler: joi.boolean(),
   productionSourceMap: joi.boolean(),
   vueLoader: joi.object(),
+  dll: joi.alternatives().try(
+    joi.boolean(),
+    joi.array().items(joi.string())
+  ),
   css: joi.object({
     modules: joi.boolean(),
     extract: joi.boolean(),

packages/@vue/cli-service/lib/webpack/PreloadPlugin.js

@@ -57,6 +57,18 @@ module.exports = class PreloadPlugin {
   apply (compiler) {
     const options = this.options
     compiler.plugin('compilation', compilation => {
+      // Auto DLL plugin injects assets by mutating html plugin data, so the only
+      // way to get a hold of those is by saving the pre-mutated assets and
+      // comparing them later.
+      let originalAssets
+      compilation.plugin('html-webpack-plugin-before-html-generation', (htmlPluginData, cb) => {
+        originalAssets = [
+          ...htmlPluginData.assets.js,
+          ...htmlPluginData.assets.css
+        ]
+        cb(null, htmlPluginData)
+      })
+
       compilation.plugin('html-webpack-plugin-before-html-processing', (htmlPluginData, cb) => {
         let filesToInclude = ''
         let extractedChunks = []
@@ -95,11 +107,22 @@ module.exports = class PreloadPlugin {
 
         const publicPath = compilation.outputOptions.publicPath || ''
 
-        // Only handle the chunk import by the htmlWebpackPlugin
+        // Only handle the chunk imported by the htmlWebpackPlugin
         extractedChunks = extractedChunks.filter(chunk => doesChunkBelongToHTML(
           chunk, getValues(htmlPluginData.assets.chunks), {}))
 
-        flatten(extractedChunks.map(chunk => chunk.files)).filter(entry => {
+        let files = flatten(extractedChunks.map(chunk => chunk.files))
+
+        // if handling initial or all chunks, also include assets injected by
+        // Auto DLL plugin.
+        if (options.include === 'initial' || options.include === 'all') {
+          files = [...htmlPluginData.assets.js, ...htmlPluginData.assets.css]
+              .filter(file => !originalAssets.includes(file))
+              .map(file => file.replace(publicPath, ''))
+              .concat(files)
+        }
+
+        Array.from(new Set(files)).filter(entry => {
           return this.options.fileBlacklist.every(regex => regex.test(entry) === false)
         }).forEach(entry => {
           entry = `${publicPath}${entry}`

packages/@vue/cli-service/package.json

@@ -24,6 +24,7 @@
     "@vue/cli-overlay": "^3.0.0-alpha.1",
     "@vue/cli-shared-utils": "^3.0.0-alpha.1",
     "address": "^1.0.3",
+    "autodll-webpack-plugin": "^0.3.8",
     "autoprefixer": "^7.2.5",
     "case-sensitive-paths-webpack-plugin": "^2.1.1",
     "chalk": "^2.3.0",

yarn.lock

@@ -1003,6 +1003,21 @@ atob@^2.0.0:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.0.3.tgz#19c7a760473774468f20b2d2d03372ad7d4cbf5d"
 
+autodll-webpack-plugin@^0.3.8:
+  version "0.3.8"
+  resolved "https://registry.yarnpkg.com/autodll-webpack-plugin/-/autodll-webpack-plugin-0.3.8.tgz#d087dda8ca3f9e3231a15df3d42d1efde73c5777"
+  dependencies:
+    bluebird "^3.5.0"
+    del "^3.0.0"
+    find-cache-dir "^1.0.0"
+    lodash "^4.17.4"
+    make-dir "^1.0.0"
+    memory-fs "^0.4.1"
+    mkdirp "^0.5.1"
+    read-pkg "^2.0.0"
+    webpack-merge "^4.1.0"
+    webpack-sources "^1.0.1"
+
 autoprefixer@^6.3.1:
   version "6.7.7"
   resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-6.7.7.tgz#1dbd1c835658e35ce3f9984099db00585c782014"
@@ -9796,7 +9811,7 @@ webpack-dev-server@^2.11.0:
     webpack-dev-middleware "1.12.2"
     yargs "6.6.0"
 
-webpack-merge@^4.1.1:
+webpack-merge@^4.1.0, webpack-merge@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-4.1.1.tgz#f1197a0a973e69c6fbeeb6d658219aa8c0c13555"
   dependencies: