The uv cache is preventing me from updating the environment with my lastest development

[12rambau]

Current Behavior

I tried to use the new cool kid of package management in my nox sessions , namely uv.

I run things as simple as this:

@nox.session(reuse_venv=True, venv_backend="uv")
def test(session):
    """Run the selected tests and report coverage in html."""
    session.install(".[test]")
    test_files = session.posargs or ["tests"]
    session.run("pytest", "--cov", "--cov-report=html", *test_files)

from my package and recently I was trying to handle a more complicated prblem of error catching. WHataver the changes I was making the result of my test was never changing. After some time I decided to remove the "uv" backend and everything started to work as expected. My finding is that session.install(".[test]") is not honored by the uv backend and the lib I'm working on is never reinstalled which makes it unusable.

Expected Behavior

I would like the session.install(".") to be honored as per pip i.e. reinstalling the local package systematically.

[henryiii]

That's a bug/feature with uv. Here's the warning copied from our docs:

Warning

The uv backend does not reinstall, even for local packages, so you need to include --reinstall-package <pkg-name> (uv-only) if reusing the environment.

Longer term, maybe we could introduce some sort of command like .install_package(extras=["test"], editable=False) that adds this for uv.

Though I'm not sure how we can guess the package name reliably...