bunx @tailwindcss/upgrade fails on windows due to path handling

[kjk]

What version of Bun is running?

1.2.4+fd9a5ea66

What platform is your computer?

Microsoft Windows NT 10.0.26100.0 x64

What steps can reproduce the bug?

• Checkout kjk/edna@026c634 i.e.
  • git clone https://github.com/kjk/edna.git
  • cd edna
  • git checkout 026c6342fff06e0804532e3ff05ec7d143b3d8ac
• run @tailwindcss/upgrade (https://tailwindcss.com/docs/upgrade-guide) with bunx instead of npx:
  • bunx @tailwindcss/upgrade

What is the expected behavior?

It should work just like npx @tailwindcss/upgrade

What do you see instead?

It fails with:

PS C:\Users\kjk\src\edna> bunx @tailwindcss/upgrade
≈ tailwindcss v4.0.12

│ Searching for CSS files in the current directory and its subdirectories…
│ ↳ Linked `.\tailwind.config.cjs` to `.\src\main.css`
│ Migrating JavaScript configuration files…
│ ↳ Could not load the configuration file: Can't resolve '..\..\..\..\..\..\..\..\..\src\edna\tailwind.config.cjs' in
│   'C:\Users\kjk\AppData\Local\Temp\bunx-329713139-@tailwindcss\upgrade@latest\node_modules\@tailwindcss\upgrade\dist'

npx @tailwindcss/upgrade doesn't fail.

Note: the path ..\..\..\..\..\..\..\..\..\src\edna\tailwind.config.cjs relative to C:\Users\kjk\AppData\Local\Temp\bunx-329713139-@tailwindcss\upgrade@latest\node_modules\@tailwindcss\upgrade\dist is correct.

It seems some node compat function doesn't handle relative path which results in failure to open that file. Not sure if that's just Windows or all platforms, I only tested Windows.

Additional information

No response

[RiskyMH]

It seems some node compat function

Note that as you have node installed and not using --bun, this seems to be an issue with what bunx is passing to node (and being incorrect compared to npx)