Switch to pyproject and ruff

[alexfikl]

This does the switch as for the other projects. I've tested that it still builds the sdist and wheel correctly with python -m build.

The only other thing that's changed is the removal of that _git_rev.py file. If I understood the logic correctly:

• In a normal git editable install, it was being overwritten anyway.
• In a tagged release sdist/wheel, it wouldn't matter because the full version is enough of an identifier.
• In a non-release sdist/wheel, it would still be needed, since there's no git directory. Is this a valid usecase? Maybe we can use something standardized like setuptools-scm for that..

TODOs

• Gitlab CI started at https://gitlab.tiker.net/fikl2/pytential/-/pipelines/563826.
• mypy failures are fixed by pyproject: hack around to make editable install work pytools#240. Specifically by changing memoize_in(Generic[P, R]) to just memoize_in. Not sure why that's suddenly an issue..
  • Nevermind, apparently this is also fixed by setting python_version = "3.8" for mypy (like it was originally in setup.cfg). By default it uses the version of the interpreter (3.12 on the CI, I assume) and was unhappy about this for some reason..

[alexfikl]

@inducer Just re-ran the whole CI and it didn't crash, so not sure what that symengine failure was about :\

[inducer]

Thx!