Bug report

Bug description:

When using the virtualenv activate script in Git Bash for Windows, the environment is not correctly detected and paths are not converted.

This results in $PATH being set to something like D:\a\github-actions-shells\github-actions-shells\venv/Scripts:..., instead of /d/a/github-actions-shells/github-actions-shells/venv/Scripts.

Prior to #112508, the detection used $OSTYPE, which reports msys in Git Bash for Windows, however uname returns MINGW....

This is a regression in Python 3.13.0

CPython versions tested on:

3.13

Operating systems tested on:

Windows

Linked PRs

• gh-125398: Convert paths in venv activate script when using Git Bash under Windows #125399
• [3.13] gh-125398: Convert paths in venv activate script when using Git Bash under Windows (GH-125399) #125733