ci: enable uv cache, use astral-sh official action

[aidoskanapyanov]

What type of PR is this? (check all applicable)

• 💾 Refactor
• ✨ Feature
• 🐛 Bug Fix
• 🔧 Optimization
• 📝 Documentation
• ✅ Test
• 🐳 Other

Related issues

• Related issue #
• Closes [Enh]: Use offical astral-sh/setup-uv@v2 github action and enable caching in the CI #955

Checklist

• Code follows style guide (ruff)
• Tests added
• Documented the changes

If you have comments or can explain your changes, please do so below.

Also added cache-dependency-glob pattern to revalidate the cache whenever the requirements-dev.txt file is changed. I hope this will work, gotta test it :)

[aidoskanapyanov]

This is how uv cached the dependencies, I also added a python-version suffix to distinguish between versions:
https://github.com/narwhals-dev/narwhals/actions/caches

Shall we trigger CI rerun and see if it cuts the install-reqs step?

[FBruzzesi]

This is how uv cached the dependencies, I also added a python-version suffix to distinguish between versions: https://github.com/narwhals-dev/narwhals/actions/caches

Shall we trigger CI rerun and see if it cuts the install-reqs step?

I re-triggered for python 3.12 here

[MarcoGorelli]

did it work? shall we ship it?

[FBruzzesi]

did it work? shall we ship it?

I honestly could not spot much of the difference, but still would prefer to use the official action rather then a manual installation.
From the uv github section, it seems we could use uv to install run tests as well (happy to keep it as a followup)

[MarcoGorelli]

agree - let's do this then, thanks @aidoskanapyanov !

[aidoskanapyanov]

I pulled up statistics for install-reqs step in pytest-38 (3.8, ubuntu-latest) job in PyTest workflow for the last 60-ish days via gh api.
And it turns out there's really no difference in using cache for installing dependencies. If anything this may have slowed down the run times :/

[FBruzzesi]

Wow that some graph! Thanks for taking such an in depth look at this!

I guess that uv is faster than building, checking and grabbing from a cache then 😂 Should we revert this one?

[aidoskanapyanov]

Yeah, I think we need to revert it, installing from https://astral.sh/uv/install.sh looked fine. Seems like a pretty permanent url to me 😂
Also, cache entries are piling up with each CI run in https://github.com/narwhals-dev/narwhals/actions/caches.
Some of them are being used, but I don't think it makes much of a difference in performace.

[aidoskanapyanov]

If anything this may have slowed down the run times

Could also be that we've added 3 new dev dependencies since then