Windows fails to validate pubspec.yaml due to unnormalized path separator

[Desdaemon]

Description

We have a project where the Dart library lies in a child directory of the repository. When running Pana from within the library, it resolves the path to child/pubspec.yaml, which fails normalization on Windows and throws this error:

INFO       Unable to parse `pubspec.yaml` from git repository. Invalid argument(s): Path "child/pubspec.yaml" is not normalized.
           Invalid argument(s): Path "child/pubspec.yaml" is not normalized.

On other platforms, which mostly use / as the path separator, no issues are raised.

Reproducing

Run Pana within the frb_dart directory of this repository.

[Boehrsi]

I can also confirm this e.g. for my https://github.com/Boehrsi/device_marketing_names library. Pana on the GitHub CI (Linux) works fine, while on my local system (Windows 11) the mentioned error is thrown. Would be great to have a fix.

[sigurdm]

Still relevant

[thorizer]

any update?