fix(nuxt): apply more import protections for nitro runtime

packages/nuxt/src/core/nitro.ts

@@ -17,7 +17,7 @@ import { template as defaultSpaLoadingTemplate } from '@nuxt/ui-templates/templa
 import { version as nuxtVersion } from '../../package.json'
 import { distDir } from '../dirs'
 import { toArray } from '../utils'
-import { ImportProtectionPlugin } from './plugins/import-protection'
+import { ImportProtectionPlugin, nuxtImportProtections } from './plugins/import-protection'
 
 export async function initNitro (nuxt: Nuxt & { _nitro?: Nitro }) {
   // Resolve config
@@ -339,10 +339,7 @@ export async function initNitro (nuxt: Nuxt & { _nitro?: Nitro }) {
   nitroConfig.rollupConfig!.plugins!.push(
     ImportProtectionPlugin.rollup({
       rootDir: nuxt.options.rootDir,
-      patterns: [
-        ...['#app', /^#build(\/|$)/]
-          .map(p => [p, 'Vue app aliases are not allowed in server routes.']) as [RegExp | string, string][]
-      ],
+      patterns: nuxtImportProtections(nuxt, { isNitro: true }),
       exclude: [/core[\\/]runtime[\\/]nitro[\\/]renderer/]
     })
   )

packages/nuxt/src/core/nuxt.ts

@@ -16,7 +16,7 @@ import importsModule from '../imports/module'
 /* eslint-enable */
 import { distDir, pkgDir } from '../dirs'
 import { version } from '../../package.json'
-import { ImportProtectionPlugin, vueAppPatterns } from './plugins/import-protection'
+import { ImportProtectionPlugin, nuxtImportProtections } from './plugins/import-protection'
 import type { UnctxTransformPluginOptions } from './plugins/unctx'
 import { UnctxTransformPlugin } from './plugins/unctx'
 import type { TreeShakeComposablesPluginOptions } from './plugins/tree-shake'
@@ -89,7 +89,7 @@ async function initNuxt (nuxt: Nuxt) {
     rootDir: nuxt.options.rootDir,
     // Exclude top-level resolutions by plugins
     exclude: [join(nuxt.options.rootDir, 'index.html')],
-    patterns: vueAppPatterns(nuxt)
+    patterns: nuxtImportProtections(nuxt)
   }
   addVitePlugin(() => ImportProtectionPlugin.vite(config))
   addWebpackPlugin(() => ImportProtectionPlugin.webpack(config))

packages/nuxt/src/core/plugins/import-protection.ts

@@ -3,7 +3,7 @@ import { createUnplugin } from 'unplugin'
 import { logger } from '@nuxt/kit'
 import { isAbsolute, join, relative } from 'pathe'
 import escapeRE from 'escape-string-regexp'
-import type { Nuxt } from 'nuxt/schema'
+import type { NuxtOptions } from 'nuxt/schema'
 
 const _require = createRequire(import.meta.url)
 
@@ -13,16 +13,45 @@ interface ImportProtectionOptions {
   exclude?: Array<RegExp | string>
 }
 
-export const vueAppPatterns = (nuxt: Nuxt) => [
-  [/^(nuxt|nuxt3|nuxt-nightly)$/, '`nuxt`/`nuxt3`/`nuxt-nightly` cannot be imported directly. Instead, import runtime Nuxt composables from `#app` or `#imports`.'],
-  [/^((|~|~~|@|@@)\/)?nuxt\.config(\.|$)/, 'Importing directly from a `nuxt.config` file is not allowed. Instead, use runtime config or a module.'],
-  [/(^|node_modules\/)@vue\/composition-api/],
-  ...nuxt.options.modules.filter(m => typeof m === 'string').map((m: any) =>
-    [new RegExp(`^${escapeRE(m as string)}$`), 'Importing directly from module entry points is not allowed.']),
-  ...[/(^|node_modules\/)@nuxt\/kit/, /(^|node_modules\/)nuxt\/(config|kit|schema)/, /^nitropack/]
-    .map(i => [i, 'This module cannot be imported in the Vue part of your app.']),
-  [new RegExp(escapeRE(join(nuxt.options.srcDir, (nuxt.options.dir as any).server || 'server')) + '\\/(api|routes|middleware|plugins)\\/'), 'Importing from server is not allowed in the Vue part of your app.']
-] as ImportProtectionOptions['patterns']
+export const nuxtImportProtections = (nuxt: { options: NuxtOptions }, options: { isNitro?: boolean } = {}) => {
+  const patterns: ImportProtectionOptions['patterns'] = []
+
+  patterns.push([
+    /^(nuxt|nuxt3|nuxt-nightly)$/,
+    '`nuxt`, `nuxt3` or `nuxt-nightly` cannot be imported directly.' + (options.isNitro ? '' : ' Instead, import runtime Nuxt composables from `#app` or `#imports`.')
+  ])
+
+  patterns.push([
+    /^((|~|~~|@|@@)\/)?nuxt\.config(\.|$)/,
+    'Importing directly from a `nuxt.config` file is not allowed. Instead, use runtime config or a module.'
+  ])
+
+  patterns.push([/(^|node_modules\/)@vue\/composition-api/])
+
+  for (const mod of nuxt.options.modules.filter(m => typeof m === 'string')) {
+    patterns.push([
+      new RegExp(`^${escapeRE(mod as string)}$`),
+      'Importing directly from module entry-points is not allowed.'
+    ])
+  }
+
+  for (const i of [/(^|node_modules\/)@nuxt\/kit/, /(^|node_modules\/)nuxt\/(config|kit|schema)/, 'nitropack']) {
+    patterns.push([i, 'This module cannot be imported' + (options.isNitro ? 'in server runtime.' : ' in the Vue part of your app.')])
+  }
+
+  if (options.isNitro) {
+    for (const i of ['#app', /^#build(\/|$)/]) {
+      patterns.push([i, 'Vue app aliases are not allowed in server runtime.'])
+    }
+  }
+
+  patterns.push(
+    [new RegExp(escapeRE(join(nuxt.options.srcDir, nuxt.options.serverDir || 'server')) + '\\/(api|routes|middleware|plugins)\\/'),
+      'Importing from server is not allowed in the Vue part of your app.'
+    ])
+
+  return patterns
+}
 
 export const ImportProtectionPlugin = createUnplugin(function (options: ImportProtectionOptions) {
   const cache: Record<string, Map<string | RegExp, boolean>> = {}

packages/nuxt/test/import-protection.test.ts

@@ -1,6 +1,7 @@
 import { normalize } from 'pathe'
 import { describe, expect, it } from 'vitest'
-import { ImportProtectionPlugin, vueAppPatterns } from '../src/core/plugins/import-protection'
+import { ImportProtectionPlugin, nuxtImportProtections } from '../src/core/plugins/import-protection'
+import type { NuxtOptions } from '../schema'
 
 const testsToTriggerOn = [
   ['~/nuxt.config', 'app.vue', true],
@@ -39,13 +40,13 @@ describe('import protection', () => {
 const transformWithImportProtection = (id: string, importer: string) => {
   const plugin = ImportProtectionPlugin.rollup({
     rootDir: '/root',
-    patterns: vueAppPatterns({
+    patterns: nuxtImportProtections({
       options: {
         modules: ['some-nuxt-module'],
         srcDir: 'src/',
-        dir: { server: 'server' }
-      }
-    } as any)
+        serverDir: 'server'
+      } satisfies Partial<NuxtOptions> as NuxtOptions
+    })
   })
 
   return (plugin as any).resolveId(id, importer)