Add remaining types to setuptools.build_meta

[henryiii]

This is an attempt to finish the incomplete types in setuptools.build_meta. This is really useful if you are "wrapping" the PEP 715 interface to add something (like a dynamic dependency.

Also adds the missing editable hooks (PEP 660), added in setuptools 62 IIRC.

Original source: https://github.com/pypa/setuptools/blob/main/setuptools/build_meta.py

Example of usage (currently full of type ignores): https://github.com/scikit-build/scikit-build-core/blob/main/src/scikit_build_core/setuptools/build_meta.py

[henryiii]

Any idea how I can test this with a local copy of mypy? Mypy seems to refuse to use the typeshed stubs even if I add --custom-typeshed-dir, it it seems to produce Skipping analyzing "setuptools.build_meta": module is installed, but missing library stubs or py.typed marker (also the other subdirs) if I add it to the MYPYPATH. Edit: realized it's in a setuptools subdirectory.

[henryiii]

Not a complete test of the API, but I was able to remove my type ignores and it's passing!

[AlexWaygood]

Looks good! The stubs for the global functions can be simplified a bit, see my comment below.

For some of the parameters currently annotated with str, they will strictly speaking also accept os.PathLike objects, since the arguments are immediately passed to os.path.abspath, which accepts path-like objects. But the fact that these parameters accept path-like objects now seems like an accident of the current implementation, rather than something that's designed to be supported. So let's stick with your current annotation of str for those parameters.

[AlexWaygood]

Thanks!

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉