fix(nuxt): don't try to strip directory file extensions (#25965)

packages/nuxt/src/imports/module.ts

@@ -1,3 +1,4 @@
+import { existsSync } from 'node:fs'
 import { addTemplate, addVitePlugin, addWebpackPlugin, defineNuxtModule, isIgnored, logger, resolveAlias, tryResolveModule, updateTemplates, useNuxt } from '@nuxt/kit'
 import { isAbsolute, join, normalize, relative, resolve } from 'pathe'
 import type { Import, Unimport } from 'unimport'
@@ -5,6 +6,7 @@ import { createUnimport, scanDirExports } from 'unimport'
 import type { ImportPresetWithDeprecation, ImportsOptions } from 'nuxt/schema'
 
 import { lookupNodeModuleSubpath, parseNodeModulePath } from 'mlly'
+import { isDirectory } from '../utils'
 import { TransformPlugin } from './transform'
 import { defaultPresets } from './presets'
 
@@ -140,13 +142,10 @@ export default defineNuxtModule<Partial<ImportsOptions>>({
 function addDeclarationTemplates (ctx: Unimport, options: Partial<ImportsOptions>) {
   const nuxt = useNuxt()
 
-  // Remove file extension for benefit of TypeScript
-  const stripExtension = (path: string) => path.replace(/\.[a-z]+$/, '')
-
   const resolvedImportPathMap = new Map<string, string>()
   const r = ({ from }: Import) => resolvedImportPathMap.get(from)
 
-  async function cacheImportPaths(imports: Import[]) {
+  async function cacheImportPaths (imports: Import[]) {
     const importSource = Array.from(new Set(imports.map(i => i.from)))
     await Promise.all(importSource.map(async (from) => {
       if (resolvedImportPathMap.has(from)) {
@@ -163,11 +162,15 @@ function addDeclarationTemplates (ctx: Unimport, options: Partial<ImportsOptions
           return join(dir, name, subpath || '')
         }) ?? path
       }
+
+      if (existsSync(path) && !(await isDirectory(path))) {
+        path = path.replace(/\.[a-z]+$/, '')
+      }
+
       if (isAbsolute(path)) {
         path = relative(join(nuxt.options.buildDir, 'types'), path)
       }
 
-      path = stripExtension(path)
       resolvedImportPathMap.set(from, path)
     }))
   }

packages/nuxt/src/utils.ts

@@ -1,3 +1,9 @@
+import { promises as fsp } from 'node:fs'
+
 export function toArray<T> (value: T | T[]): T[] {
   return Array.isArray(value) ? value : [value]
 }
+
+export async function isDirectory (path: string) {
+  return (await fsp.lstat(path)).isDirectory()
+}