refactor(nuxt,schema,vite,webpack): use unplugin for vfs

packages/kit/src/template.ts

@@ -211,13 +211,10 @@ export async function _generateTypes (nuxt: Nuxt) {
     exclude: [...exclude],
   } satisfies TSConfig)
 
-  const aliases: Record<string, string> = {
-    ...nuxt.options.alias,
-    '#build': nuxt.options.buildDir,
-  }
+  const aliases: Record<string, string> = nuxt.options.alias
 
   // Exclude bridge alias types to support Volar
-  const excludedAlias = [/^@vue\/.*$/]
+  const excludedAlias = [/^@vue\/.*$/, /^#internal\/nuxt/]
 
   const basePath = tsConfig.compilerOptions!.baseUrl
     ? resolve(nuxt.options.buildDir, tsConfig.compilerOptions!.baseUrl)

packages/kit/test/generate-types.spec.ts

@@ -34,9 +34,6 @@ describe('tsConfig generation', () => {
     const { tsConfig } = await _generateTypes(mockNuxt)
     expect(tsConfig.compilerOptions?.paths).toMatchInlineSnapshot(`
       {
-        "#build": [
-          ".",
-        ],
         "some-custom-alias": [
           "../some-alias",
         ],

packages/nuxt/src/core/app.ts

@@ -74,7 +74,7 @@ export async function generateApp (nuxt: Nuxt, app: NuxtApp, options: { filter?:
     if (template.modified) {
       nuxt.vfs[fullPath] = contents
 
-      const aliasPath = '#build/' + template.filename!.replace(/\.\w+$/, '')
+      const aliasPath = '#build/' + template.filename
       nuxt.vfs[aliasPath] = contents
 
       // In case a non-normalized absolute path is called for on Windows

packages/nuxt/src/core/nitro.ts

@@ -102,7 +102,7 @@ export async function initNitro (nuxt: Nuxt & { _nitro?: Nitro }) {
     devHandlers: [],
     baseURL: nuxt.options.app.baseURL,
     virtual: {
-      '#internal/nuxt.config.mjs': () => nuxt.vfs['#build/nuxt.config'],
+      '#internal/nuxt.config.mjs': () => nuxt.vfs['#build/nuxt.config.mjs'],
       '#spa-template': async () => `export const template = ${JSON.stringify(await spaLoadingTemplate(nuxt))}`,
     },
     routeRules: {
@@ -193,11 +193,11 @@ export async function initNitro (nuxt: Nuxt & { _nitro?: Nitro }) {
           },
       '@vue/devtools-api': 'vue-devtools-stub',
 
-      // Paths
-      '#internal/nuxt/paths': resolve(distDir, 'core/runtime/nitro/paths'),
-
       // Nuxt aliases
       ...nuxt.options.alias,
+
+      // Paths
+      '#internal/nuxt/paths': resolve(distDir, 'core/runtime/nitro/paths'),
     },
     replace: {
       'process.env.NUXT_NO_SSR': nuxt.options.ssr === false,

packages/nuxt/src/core/nuxt.ts

@@ -46,6 +46,7 @@ import { RemovePluginMetadataPlugin } from './plugins/plugin-metadata'
 import { AsyncContextInjectionPlugin } from './plugins/async-context'
 import { resolveDeepImportsPlugin } from './plugins/resolve-deep-imports'
 import { prehydrateTransformPlugin } from './plugins/prehydrate'
+import { VirtualFSPlugin } from './plugins/virtual'
 
 export function createNuxt (options: NuxtOptions): Nuxt {
   const hooks = createHooks<NuxtHooks>()
@@ -242,6 +243,10 @@ async function initNuxt (nuxt: Nuxt) {
     }
   }
 
+  // Support Nuxt VFS
+  addBuildPlugin(VirtualFSPlugin(nuxt, { mode: 'server' }), { client: false })
+  addBuildPlugin(VirtualFSPlugin(nuxt, { mode: 'client', alias: { '#internal/nitro': '#build/nitro.client.mjs' } }), { server: false })
+
   // Add plugin normalization plugin
   addBuildPlugin(RemovePluginMetadataPlugin(nuxt))
 

packages/nuxt/src/core/plugins/resolve-deep-imports.ts

@@ -16,7 +16,7 @@ export function resolveDeepImportsPlugin (nuxt: Nuxt): Plugin {
       conditions = config.mode === 'test' ? [...config.resolve.conditions, 'import', 'require'] : config.resolve.conditions
     },
     async resolveId (id, importer) {
-      if (!importer || isAbsolute(id) || (!isAbsolute(importer) && !importer.startsWith('virtual:')) || exclude.some(e => id.startsWith(e))) {
+      if (!importer || isAbsolute(id) || (!isAbsolute(importer) && !importer.startsWith('virtual:') && !importer.startsWith('\0virtual:')) || exclude.some(e => id.startsWith(e))) {
         return
       }
 

packages/nuxt/src/core/plugins/virtual.ts

@@ -0,0 +1,64 @@
+import { resolveAlias, useNuxt } from '@nuxt/kit'
+import { dirname, isAbsolute, join, resolve } from 'pathe'
+import { createUnplugin } from 'unplugin'
+
+const PREFIX = '\0virtual:nuxt:'
+
+interface VirtualFSPluginOptions {
+  mode: 'client' | 'server'
+  alias?: Record<string, string>
+}
+
+export const VirtualFSPlugin = (nuxt = useNuxt(), options: VirtualFSPluginOptions) => createUnplugin(() => {
+  const extensions = ['', ...nuxt.options.extensions]
+  const alias = { ...nuxt.options.alias, ...options.alias }
+
+  const resolveWithExt = (id: string) => {
+    for (const suffix of ['', '.' + options.mode]) {
+      for (const ext of extensions) {
+        const rId = id + suffix + ext
+        if (rId in nuxt.vfs) {
+          return rId
+        }
+      }
+    }
+  }
+
+  return {
+    name: 'nuxt:virtual',
+    enforce: 'post',
+
+    resolveId (id, importer) {
+      const _id = id
+      id = resolveAlias(id, alias)
+
+      if (process.platform === 'win32' && isAbsolute(id)) {
+        // Add back C: prefix on Windows
+        id = resolve(id)
+      }
+
+      const resolvedId = resolveWithExt(id)
+      if (resolvedId) {
+        return PREFIX + resolvedId
+      }
+
+      if (importer && !isAbsolute(id)) {
+        const resolved = resolveWithExt(join(dirname(importer), id))
+        if (resolved) {
+          return PREFIX + resolved
+        }
+      }
+    },
+
+    loadInclude (id) {
+      return id.startsWith(PREFIX)
+    },
+
+    load (id) {
+      return {
+        code: nuxt.vfs[id.slice(PREFIX.length)] || '',
+        map: null,
+      }
+    },
+  }
+})

packages/nuxt/src/core/templates.ts

@@ -57,7 +57,7 @@ export const cssTemplate: NuxtTemplate = {
 }
 
 export const clientPluginTemplate: NuxtTemplate = {
-  filename: 'plugins/client.mjs',
+  filename: 'plugins.client.mjs',
   async getContents (ctx) {
     const clientPlugins = await annotatePlugins(ctx.nuxt, ctx.app.plugins.filter(p => !p.mode || p.mode !== 'server'))
     checkForCircularDependencies(clientPlugins)
@@ -77,7 +77,7 @@ export const clientPluginTemplate: NuxtTemplate = {
 }
 
 export const serverPluginTemplate: NuxtTemplate = {
-  filename: 'plugins/server.mjs',
+  filename: 'plugins.server.mjs',
   async getContents (ctx) {
     const serverPlugins = await annotatePlugins(ctx.nuxt, ctx.app.plugins.filter(p => !p.mode || p.mode !== 'client'))
     checkForCircularDependencies(serverPlugins)

packages/nuxt/src/head/module.ts

@@ -81,8 +81,8 @@ export default import.meta.server ? [CapoPlugin({ track: true })] : [];`
 
     // template is only exposed in nuxt context, expose in nitro context as well
     nuxt.hooks.hook('nitro:config', (config) => {
-      config.virtual!['#internal/unhead-plugins.mjs'] = () => nuxt.vfs['#build/unhead-plugins']
-      config.virtual!['#internal/unhead.config.mjs'] = () => nuxt.vfs['#build/unhead.config']
+      config.virtual!['#internal/unhead-plugins.mjs'] = () => nuxt.vfs['#build/unhead-plugins.mjs']
+      config.virtual!['#internal/unhead.config.mjs'] = () => nuxt.vfs['#build/unhead.config.mjs']
     })
 
     // Add library-specific plugin

packages/schema/src/config/common.ts

@@ -421,7 +421,7 @@ export default defineUntypedSchema({
    */
   alias: {
     $resolve: async (val: Record<string, string>, get): Promise<Record<string, string>> => {
-      const [srcDir, rootDir, assetsDir, publicDir] = await Promise.all([get('srcDir'), get('rootDir'), get('dir.assets'), get('dir.public')]) as [string, string, string, string]
+      const [srcDir, rootDir, assetsDir, publicDir, buildDir] = await Promise.all([get('srcDir'), get('rootDir'), get('dir.assets'), get('dir.public'), get('buildDir')]) as [string, string, string, string, string]
       return {
         '~': srcDir,
         '@': srcDir,
@@ -429,6 +429,8 @@ export default defineUntypedSchema({
         '@@': rootDir,
         [basename(assetsDir)]: resolve(srcDir, assetsDir),
         [basename(publicDir)]: resolve(srcDir, publicDir),
+        '#build': buildDir,
+        '#internal/nuxt/paths': resolve(buildDir, 'paths.mjs'),
         ...val,
       }
     },

packages/vite/src/client.ts

@@ -109,9 +109,7 @@ export async function buildClient (ctx: ViteBuildContext) {
       alias: {
         ...nodeCompat.alias,
         ...ctx.config.resolve?.alias,
-        '#internal/nuxt/paths': resolve(ctx.nuxt.options.buildDir, 'paths.mjs'),
-        '#build/plugins': resolve(ctx.nuxt.options.buildDir, 'plugins/client'),
-        '#internal/nitro': resolve(ctx.nuxt.options.buildDir, 'nitro.client.mjs'),
+        '#internal/nitro': '#build/nitro.client.mjs',
       },
       dedupe: [
         'vue',

packages/vite/src/plugins/virtual.ts

@@ -1,48 +0,0 @@
-import { dirname, isAbsolute, join, resolve } from 'pathe'
-import type { Plugin } from 'vite'
-
-const PREFIX = 'virtual:nuxt:'
-
-export default function virtual (vfs: Record<string, string>): Plugin {
-  const extensions = ['', '.ts', '.vue', '.mjs', '.cjs', '.js', '.json']
-  const resolveWithExt = (id: string) => {
-    for (const ext of extensions) {
-      const rId = id + ext
-      if (rId in vfs) {
-        return rId
-      }
-    }
-    return null
-  }
-
-  return {
-    name: 'virtual',
-
-    resolveId (id, importer) {
-      if (process.platform === 'win32' && isAbsolute(id)) {
-        // Add back C: prefix on Windows
-        id = resolve(id)
-      }
-      const resolvedId = resolveWithExt(id)
-      if (resolvedId) { return PREFIX + resolvedId }
-      if (importer && !isAbsolute(id)) {
-        const importerNoPrefix = importer.startsWith(PREFIX) ? importer.slice(PREFIX.length) : importer
-        const importedDir = dirname(importerNoPrefix)
-        const resolved = resolveWithExt(join(importedDir, id))
-        if (resolved) { return PREFIX + resolved }
-      }
-      return null
-    },
-
-    load (id) {
-      if (!id.startsWith(PREFIX)) { return null }
-      const idNoPrefix = id.slice(PREFIX.length)
-      if (idNoPrefix in vfs) {
-        return {
-          code: vfs[idNoPrefix] || '',
-          map: null,
-        }
-      }
-    },
-  }
-}

packages/vite/src/server.ts

@@ -59,10 +59,6 @@ export async function buildServer (ctx: ViteBuildContext) {
     },
     resolve: {
       conditions: ((ctx.nuxt as any)._nitro as Nitro)?.options.exportConditions,
-      alias: {
-        '#internal/nuxt/paths': resolve(ctx.nuxt.options.buildDir, 'paths.mjs'),
-        '#build/plugins': resolve(ctx.nuxt.options.buildDir, 'plugins/server'),
-      },
     },
     ssr: {
       external: [

packages/vite/src/vite-node.ts

@@ -41,7 +41,7 @@ export function viteNodePlugin (ctx: ViteBuildContext): VitePlugin {
     configureServer (server) {
       function invalidateVirtualModules () {
         for (const [id, mod] of server.moduleGraph.idToModuleMap) {
-          if (id.startsWith('virtual:')) {
+          if (id.startsWith('virtual:') || id.startsWith('\0virtual:')) {
             markInvalidate(mod)
           }
         }

packages/vite/src/vite.ts

@@ -12,7 +12,6 @@ import { resolveTSConfig } from 'pkg-types'
 
 import { buildClient } from './client'
 import { buildServer } from './server'
-import virtual from './plugins/virtual'
 import { warmupViteServer } from './utils/warmup'
 import { resolveCSSOptions } from './css'
 import { composableKeysPlugin } from './plugins/composable-keys'
@@ -66,10 +65,6 @@ export const bundle: NuxtBuilder['bundle'] = async (nuxt) => {
           alias: {
             ...nuxt.options.alias,
             '#app': nuxt.options.appDir,
-            // We need this resolution to be present before the following entry, but it
-            // will be filled in client/server configs
-            '#build/plugins': '',
-            '#build': nuxt.options.buildDir,
             'web-streams-polyfill/ponyfill/es2018': 'unenv/runtime/mock/empty',
             // Cannot destructure property 'AbortController' of ..
             'abort-controller': 'unenv/runtime/mock/empty',
@@ -111,7 +106,6 @@ export const bundle: NuxtBuilder['bundle'] = async (nuxt) => {
             composables: nuxt.options.optimization.keyedComposables,
           }),
           replace({ preventAssignment: true, ...globalThisReplacements }),
-          virtual(nuxt.vfs),
         ],
         server: {
           watch: { ignored: isIgnored },
@@ -225,7 +219,7 @@ export const bundle: NuxtBuilder['bundle'] = async (nuxt) => {
     // Invalidate virtual modules when templates are re-generated
     ctx.nuxt.hook('app:templatesGenerated', () => {
       for (const [id, mod] of server.moduleGraph.idToModuleMap) {
-        if (id.startsWith('virtual:')) {
+        if (id.startsWith('virtual:') || id.startsWith('\0virtual:')) {
           server.moduleGraph.invalidateModule(mod)
         }
       }

packages/webpack/build.config.ts

@@ -8,7 +8,6 @@ export default defineBuildConfig({
   dependencies: [
     '@nuxt/kit',
     'unplugin',
-    'webpack-virtual-modules',
     'postcss',
     'postcss-loader',
     'vue-loader',

packages/webpack/package.json

@@ -66,7 +66,6 @@
     "webpack-bundle-analyzer": "^4.10.2",
     "webpack-dev-middleware": "^7.4.2",
     "webpack-hot-middleware": "^2.26.1",
-    "webpack-virtual-modules": "^0.6.2",
     "webpackbar": "^6.0.1"
   },
   "devDependencies": {

packages/webpack/src/presets/base.ts

@@ -118,15 +118,9 @@ function basePlugins (ctx: WebpackConfigContext) {
 function baseAlias (ctx: WebpackConfigContext) {
   ctx.alias = {
     '#app': ctx.options.appDir,
-    '#build/plugins': resolve(ctx.options.buildDir, 'plugins', ctx.isClient ? 'client' : 'server'),
-    '#build': ctx.options.buildDir,
-    '#internal/nuxt/paths': resolve(ctx.nuxt.options.buildDir, 'paths.mjs'),
     ...ctx.options.alias,
     ...ctx.alias,
   }
-  if (ctx.isClient) {
-    ctx.alias['#internal/nitro'] = resolve(ctx.nuxt.options.buildDir, 'nitro.client.mjs')
-  }
 }
 
 function baseResolve (ctx: WebpackConfigContext) {

packages/webpack/src/virtual-modules.ts

@@ -1,26 +0,0 @@
-import { useNuxt } from '@nuxt/kit'
-import VirtualModulesPlugin from 'webpack-virtual-modules'
-
-export function registerVirtualModules () {
-  const nuxt = useNuxt()
-
-  // Initialize virtual modules instance
-  const virtualModules = new VirtualModulesPlugin(nuxt.vfs)
-  const writeFiles = () => {
-    for (const filePath in nuxt.vfs) {
-      virtualModules.writeModule(filePath, nuxt.vfs[filePath] || '')
-    }
-  }
-
-  // Workaround to initialize virtual modules
-  nuxt.hook('webpack:compile', ({ compiler }) => {
-    if (compiler.name === 'server') { writeFiles() }
-  })
-  // Update virtual modules when templates are updated
-  nuxt.hook('app:templatesGenerated', writeFiles)
-
-  nuxt.hook('webpack:config', configs => configs.forEach((config) => {
-    // Support virtual modules (input)
-    config.plugins!.push(virtualModules)
-  }))
-}

packages/webpack/src/webpack.ts

@@ -15,7 +15,6 @@ import { composableKeysPlugin } from '../../vite/src/plugins/composable-keys'
 import { DynamicBasePlugin } from './plugins/dynamic-base'
 import { ChunkErrorPlugin } from './plugins/chunk'
 import { createMFS } from './utils/mfs'
-import { registerVirtualModules } from './virtual-modules'
 import { client, server } from './configs'
 import { applyPresets, createWebpackConfigContext, getWebpackConfig } from './utils/config'
 
@@ -23,8 +22,6 @@ import { applyPresets, createWebpackConfigContext, getWebpackConfig } from './ut
 // const plugins: string[] = []
 
 export const bundle: NuxtBuilder['bundle'] = async (nuxt) => {
-  registerVirtualModules()
-
   const webpackConfigs = await Promise.all([client, ...nuxt.options.ssr ? [server] : []].map(async (preset) => {
     const ctx = createWebpackConfigContext(nuxt)
     ctx.userConfig = defu(nuxt.options.webpack[`$${preset.name as 'client' | 'server'}`], ctx.userConfig)

pnpm-lock.yaml

@@ -912,9 +912,6 @@ importers:
       webpack-hot-middleware:
         specifier: ^2.26.1
         version: 2.26.1
-      webpack-virtual-modules:
-        specifier: ^0.6.2
-        version: 0.6.2
       webpackbar:
         specifier: ^6.0.1
         version: 6.0.1(webpack@5.95.0)