feat: support pre-bundle

packages/plugin-vue/README.md

@@ -73,6 +73,13 @@ export interface Options {
    * Use custom compiler-sfc instance. Can be used to force a specific version.
    */
   compiler?: typeof _compiler
+
+  /**
+   * Pre-bundle SFC files
+   *
+   * @default true
+   */
+  prebundle?: boolean
 }
 ```
 

packages/plugin-vue/src/helper.ts

@@ -1,5 +1,7 @@
 export const EXPORT_HELPER_ID = '\0plugin-vue:export-helper'
 
+export const EXPORT_HELPER_ID_RE = /plugin-vue:export-helper$/
+
 export const helperCode = `
 export default (sfc, props) => {
   const target = sfc.__vccOpts || sfc;

packages/plugin-vue/src/index.ts

@@ -19,6 +19,7 @@ import { handleHotUpdate, handleTypeDepChange } from './handleHotUpdate'
 import { transformTemplateAsModule } from './template'
 import { transformStyle } from './style'
 import { EXPORT_HELPER_ID, helperCode } from './helper'
+import { createOptimizeDeps } from './prebundle'
 
 export { parseVueRequest } from './utils/query'
 export type { VueQuery } from './utils/query'
@@ -80,6 +81,13 @@ export interface Options {
    * Use custom compiler-sfc instance. Can be used to force a specific version.
    */
   compiler?: typeof _compiler
+
+  /**
+   * Prebundle SFC libs
+   *
+   * @default true
+   */
+  prebundle?: boolean
 }
 
 export interface ResolvedOptions extends Options {
@@ -115,7 +123,7 @@ export default function vuePlugin(rawOptions: Options = {}): Plugin {
 
   let options: ResolvedOptions = {
     isProduction: process.env.NODE_ENV === 'production',
-    compiler: null as any, // to be set in buildStart
+    compiler: null as any, // to be set in configResolved or buildStart
     ...rawOptions,
     include,
     exclude,
@@ -142,7 +150,9 @@ export default function vuePlugin(rawOptions: Options = {}): Plugin {
       }
     },
 
-    config(config) {
+    config(config, env) {
+      options.prebundle ??= env.command === 'serve'
+
       return {
         resolve: {
           dedupe: config.build?.ssr ? [] : ['vue'],
@@ -156,6 +166,7 @@ export default function vuePlugin(rawOptions: Options = {}): Plugin {
             ? ['vue', '@vue/server-renderer']
             : [],
         },
+        optimizeDeps: createOptimizeDeps(config, () => options),
       }
     },
 
@@ -169,13 +180,15 @@ export default function vuePlugin(rawOptions: Options = {}): Plugin {
         devToolsEnabled:
           !!config.define!.__VUE_PROD_DEVTOOLS__ || !config.isProduction,
       }
+      options.compiler = options.compiler || resolveCompiler(options.root)
     },
 
     configureServer(server) {
       options.devServer = server
     },
 
     buildStart() {
+      // compatible with Rollup
       const compiler = (options.compiler =
         options.compiler || resolveCompiler(options.root))
       if (compiler.invalidateTypeCache) {

packages/plugin-vue/src/prebundle.ts

@@ -0,0 +1,135 @@
+import { readFile } from 'node:fs/promises'
+import { dirname } from 'node:path'
+import type { DepOptimizationOptions, UserConfig } from 'vite'
+import { createFilter, normalizePath } from 'vite'
+import { transformMain } from './main'
+import { EXPORT_HELPER_ID, EXPORT_HELPER_ID_RE, helperCode } from './helper'
+import type { ResolvedOptions } from './index'
+
+type ESBuildPlugin = NonNullable<
+  NonNullable<DepOptimizationOptions['esbuildOptions']>['plugins']
+>[number]
+
+const PLUGIN_NAME = 'vite-vue:prebundle'
+
+export function createOptimizeDeps(
+  config: UserConfig,
+  options: () => ResolvedOptions,
+): DepOptimizationOptions | undefined {
+  const opts = options()
+  if (!opts.prebundle) {
+    return config.optimizeDeps
+  }
+
+  const nextOptimizeDeps = (config.optimizeDeps ||= {})
+  const exts = (nextOptimizeDeps.extensions ||= [])
+  if (!exts.includes('.vue')) {
+    exts.push('.vue')
+  }
+
+  const esbuildOpts = (nextOptimizeDeps.esbuildOptions ||= {})
+  const plugins = (esbuildOpts.plugins ||= [])
+  plugins.push(createPrebundlePlugin(options))
+
+  return nextOptimizeDeps
+}
+
+function createPrebundlePlugin(options: () => ResolvedOptions): ESBuildPlugin {
+  const opts = options()
+  const helperFilter = EXPORT_HELPER_ID_RE
+  const transformFilter = createTransformLoadFilter(opts)
+  const customElementFilter = createCustomElementFilter(opts)
+
+  return {
+    name: PLUGIN_NAME,
+    setup(build) {
+      if (build.initialOptions.plugins?.some((v) => v.name === 'vite:dep-scan'))
+        return
+
+      build.onResolve({ filter: helperFilter }, async ({ path: filename }) => {
+        if (normalizePath(filename) === EXPORT_HELPER_ID) {
+          return { path: filename, namespace: PLUGIN_NAME }
+        }
+      })
+
+      build.onLoad({ filter: helperFilter }, async ({ path: filename }) => {
+        return {
+          contents: helperCode,
+          resolveDir: dirname(filename),
+          loader: 'js',
+        }
+      })
+
+      build.onLoad(
+        { filter: transformFilter.regexp },
+        async ({ path: filename }) => {
+          if (!transformFilter.guard(filename)) return
+
+          const { errors, warnings, pluginContext } = createFakeContext()
+          const resolveDir = dirname(filename)
+          const code = await readFile(filename, 'utf8')
+          const asCustomElement = customElementFilter(filename)
+          const transformed = await transformMain(
+            code,
+            filename,
+            options(),
+            pluginContext,
+            false,
+            asCustomElement,
+          )
+
+          return {
+            contents: transformed?.code,
+            errors,
+            warnings,
+            resolveDir,
+            loader: 'js',
+          }
+        },
+      )
+    },
+  }
+}
+
+function createTransformLoadFilter(options: ResolvedOptions) {
+  const { include, exclude } = options
+
+  if (include instanceof RegExp) {
+    return {
+      regexp: include,
+      guard: createFilter(undefined, exclude),
+    }
+  }
+
+  return {
+    regexp: /.*/,
+    guard: createFilter(include, exclude),
+  }
+}
+
+function createCustomElementFilter(options: ResolvedOptions) {
+  const { customElement } = options
+
+  return typeof customElement === 'boolean'
+    ? () => customElement
+    : createFilter(customElement)
+}
+
+function createFakeContext() {
+  const errors: { text: string }[] = []
+  const warnings: { text: string }[] = []
+  const pluginContext = {
+    error(message: any) {
+      errors.push({ text: String(message) })
+    },
+    warn(message: any) {
+      warnings.push({ text: String(message) })
+    },
+  } as any
+
+  return {
+    errors,
+    warnings,
+    pluginContext,
+  }
+}

playground/prebundle-vue-sfc-lib/__tests__/prebundle-vue-sfc-lib.spec.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it } from 'vitest'
+import { isServe, page, readVitePrebundleFile } from '~utils'
+
+describe('prebundle Vue SFC library', () => {
+  it('should page work', async () => {
+    expect(await page.textContent('span:nth-child(1)')).toMatch('hello A')
+    expect(await page.textContent('span:nth-child(2)')).toMatch('hello B')
+    expect(await page.textContent('span:nth-child(3)')).toMatch('hello C')
+    expect(await page.textContent('span:nth-child(4)')).toMatch('hello D')
+  })
+
+  it.runIf(isServe)('should prebundle @vitejs/test-lib-component', () => {
+    const metadata = JSON.parse(readVitePrebundleFile('_metadata.json'))
+    const target = metadata.optimized['@vitejs/test-lib-component']
+    expect(target).toBeDefined()
+
+    const bundled = readVitePrebundleFile(target.file)
+    expect(bundled).toContain(
+      'var CompA_default = plugin_vue_export_helper_default(_sfc_main',
+    )
+    expect(bundled).toContain(
+      'var CompB_default = plugin_vue_export_helper_default(_sfc_main',
+    )
+    expect(bundled).toContain(
+      'var CompC_default = plugin_vue_export_helper_default(_sfc_main',
+    )
+    expect(bundled).toContain(
+      'var CompD_default = plugin_vue_export_helper_default(_sfc_main',
+    )
+  })
+})

playground/prebundle-vue-sfc-lib/index.html

@@ -0,0 +1,6 @@
+<html>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="src/main.ts"></script>
+  </body>
+</html>

playground/prebundle-vue-sfc-lib/lib-component/CompA.vue

@@ -0,0 +1,14 @@
+<script>
+export default {
+  name: 'CompA',
+  setup() {
+    return {
+      message: 'hello A',
+    }
+  },
+}
+</script>
+
+<template>
+  <span>{{ message }}</span>
+</template>

playground/prebundle-vue-sfc-lib/lib-component/CompB.vue

@@ -0,0 +1,7 @@
+<script setup>
+const message = 'hello B'
+</script>
+
+<template>
+  <span>{{ message }}</span>
+</template>

playground/prebundle-vue-sfc-lib/lib-component/CompC.vue

@@ -0,0 +1,16 @@
+<script lang="ts">
+import { defineComponent } from 'vue'
+
+export default defineComponent({
+  name: 'CompC',
+  setup() {
+    return {
+      message: 'hello C',
+    }
+  },
+})
+</script>
+
+<template>
+  <span>{{ message }}</span>
+</template>

playground/prebundle-vue-sfc-lib/lib-component/CompD.vue

@@ -0,0 +1,7 @@
+<script setup lang="ts">
+const message: string = 'hello D'
+</script>
+
+<template>
+  <span>{{ message }}</span>
+</template>

playground/prebundle-vue-sfc-lib/lib-component/index.js

@@ -0,0 +1,4 @@
+export { default as CompA } from './CompA.vue'
+export { default as CompB } from './CompB.vue'
+export { default as CompC } from './CompC.vue'
+export { default as CompD } from './CompD.vue'

playground/prebundle-vue-sfc-lib/lib-component/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@vitejs/test-lib-component",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "main": "index.js"
+}

playground/prebundle-vue-sfc-lib/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "@vitejs/test-prebundle-vue-sfc-lib",
+  "private": true,
+  "version": "0.0.0",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "debug": "node --inspect-brk vite",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@vitejs/test-lib-component": "file:./lib-component",
+    "vue": "^3.3.0-beta.5"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "workspace:*"
+  }
+}

playground/prebundle-vue-sfc-lib/src/App.vue

@@ -0,0 +1,10 @@
+<script setup>
+import { CompA, CompB, CompC, CompD } from '@vitejs/test-lib-component'
+</script>
+
+<template>
+  <CompA />
+  <CompB />
+  <CompC />
+  <CompD />
+</template>

playground/prebundle-vue-sfc-lib/src/main.ts

@@ -0,0 +1,5 @@
+import { createApp } from 'vue'
+import App from './App.vue'
+
+const app = createApp(App)
+app.mount('#app')

playground/prebundle-vue-sfc-lib/vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import vue from '@vitejs/plugin-vue'
+
+export default defineConfig({
+  root: __dirname,
+  plugins: [vue()],
+})

playground/test-utils.ts

@@ -317,3 +317,22 @@ export async function killProcess(
     serverProcess.kill('SIGTERM', { forceKillAfterTimeout: 2000 })
   }
 }
+
+export function readVitePrebundleFile(file: string): string {
+  const paths = [
+    `node_modules/.vite/${file}`,
+    `node_modules/.vite/deps/${file}`, // vite 2.9
+  ]
+
+  for (const p of paths) {
+    try {
+      const fullpath = path.resolve(testDir, p)
+      const content = fs.readFileSync(fullpath, 'utf8')
+      return content
+    } catch {
+      // ignore
+    }
+  }
+
+  throw new Error(`Unable to find vite prebundle file (${file})`)
+}