fix: handle Windows backslash path separator in toCleanPath

Author: tannerlinsley

.changeset/late-lemons-battle.md

@@ -0,0 +1,5 @@
+---
+'@tanstack/create': patch
+---
+
+Fixed windows \\ delimiter stripping

packages/create/src/file-helpers.ts

@@ -42,7 +42,10 @@ export function getBinaryFile(content: string): string | null {
  */
 export function toCleanPath(absolutePath: string, baseDir: string): string {
   let cleanPath = absolutePath.replace(baseDir, '')
-  if (cleanPath.startsWith('/')) cleanPath = cleanPath.slice(1)
+  // Handle both Unix (/) and Windows (\) path separators
+  if (cleanPath.startsWith('/') || cleanPath.startsWith('\\')) {
+    cleanPath = cleanPath.slice(1)
+  }
   return cleanPath
 }
 

packages/create/tests/file-helper.test.ts

@@ -6,6 +6,7 @@ import {
   isDirectory,
   readFileHelper,
   relativePath,
+  toCleanPath,
 } from '../src/file-helpers.js'
 
 vi.mock('node:fs', () => fs)
@@ -15,6 +16,24 @@ beforeEach(() => {
   vol.reset()
 })
 
+describe('toCleanPath', () => {
+  it('should strip Unix-style leading slash', () => {
+    expect(toCleanPath('/projects/my-app/src/file.ts', '/projects/my-app')).toBe(
+      'src/file.ts',
+    )
+  })
+
+  it('should strip Windows-style leading backslash', () => {
+    expect(
+      toCleanPath('C:\\Projects\\my-app\\src\\file.ts', 'C:\\Projects\\my-app'),
+    ).toBe('src\\file.ts')
+  })
+
+  it('should handle paths without leading separator', () => {
+    expect(toCleanPath('/projects/my-app', '/projects/my-app')).toBe('')
+  })
+})
+
 describe('relativePath', () => {
   it('relative path with the same directory and strip extension', () => {
     expect(relativePath('src/utils.ts', 'src/index.ts', true)).toBe('./index')