`uv pip install ./local/git/repo` locks the git repository, `pip install` does not

[Luthaf]

I have some code in my setup.py which calls git update-index --really-refresh and git diff-index --quiet HEAD -- to know whether the user is building an unmodified commit or has uncommitted local changes. This is then used to add a local part to the version of the package, for future reference.

This works fine with pip install, but it seems that uv pip install does more on the git side, and I get the following error from git:

fatal: Unable to create '<REPO/PATH>/.git/index.lock': File exists.

Another git process seems to be running in this repository, e.g.
an editor opened by 'git commit'. Please make sure all processes
are terminated then try again. If it still fails, a git process
may have crashed in this repository earlier:
remove the file manually to continue.

Could it be possible to release the lock before calling setup.py? This happens during Calling setuptools.build_meta.build_wheel("~/.cache/uv/builds-v0/.tmpmZ68kQ", {}, None)).

This only seems to happen when the repository is in "dirty" state, with some uncommitted changes.

EDIT: this is with uv version 0.5.6, in a venv virtualenv with Python 3.12.0 on macOS, and git --version is git version 2.39.3 (Apple Git-146).

[zanieb]

Thanks for the report. It's not obvious to me where this is happening, might take some digging.

[zanieb]

Is there a simple way to reproduce this?

[Luthaf]

I am now unable to reproduce this on the original project that prompted it (for reference, this is https://github.com/metatensor/metatensor). Might have been something strange with my setup, sorry about the noise!

If this happens again I'll try to extract an MRE!

[HaoZeke]

This is present still, on dirty repos (with unstaged changes).

[notatallshaw]

@HaoZeke I would recommend opening a new issue with steps to reproduce