fix: resolve @/ scoped package subpath imports in deepImportRE regex

packages/vite/src/node/__tests__/utils.spec.ts

@@ -7,6 +7,7 @@ import {
   asyncFlatten,
   bareImportRE,
   combineSourcemaps,
+  deepImportRE,
   extractHostnamesFromSubjectAltName,
   flattenId,
   generateCodeFrame,
@@ -44,6 +45,34 @@ describe('bareImportRE', () => {
   })
 })
 
+describe('deepImportRE', () => {
+  test('should match regular package with subpath', () => {
+    const match = deepImportRE.exec('my-lib/schemas')
+    expect(match?.[1]).toBe('my-lib')
+    expect(match?.[2]).toBeUndefined()
+  })
+
+  test('should match scoped package with subpath', () => {
+    expect(deepImportRE.test('@vitejs/plugin-vue/dist/index')).toBe(true)
+    const match = deepImportRE.exec('@vitejs/plugin-vue/dist/index')
+    expect(match?.[1]).toBeUndefined()
+    expect(match?.[2]).toBe('@vitejs/plugin-vue')
+  })
+
+  test('should match @/ scoped package with subpath', () => {
+    expect(deepImportRE.test('@/lib/schemas')).toBe(true)
+    const match = deepImportRE.exec('@/lib/schemas')
+    expect(match?.[1]).toBeUndefined()
+    expect(match?.[2]).toBe('@/lib')
+  })
+
+  test('should not match package without subpath', () => {
+    expect(deepImportRE.test('my-lib')).toBe(false)
+    expect(deepImportRE.test('@vitejs/plugin-vue')).toBe(false)
+    expect(deepImportRE.test('@/lib')).toBe(false)
+  })
+})
+
 describe('injectQuery', () => {
   if (isWindows) {
     // this test will work incorrectly on unix systems

packages/vite/src/node/utils.ts

@@ -174,7 +174,7 @@ export function isOptimizable(
 }
 
 export const bareImportRE = /^(?![a-zA-Z]:)[\w@](?!.*:\/\/)/
-export const deepImportRE = /^([^@][^/]*)\/|^(@[^/]+\/[^/]+)\//
+export const deepImportRE = /^([^@][^/]*)\/|^(@[^/]*\/[^/]+)\//
 
 // TODO: use import()
 const _require = createRequire(/** #__KEEP__ */ import.meta.url)