build: enable Mypyc

[nstarman]

A very early starting implementation of mypyc builds.

[coveralls]

Pull Request Test Coverage Report for Build 21974702219

Details

• 5 of 5 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 99.591%

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Totals
Change from base Build 21961193914:	0.002%
Covered Lines:	973
Relevant Lines:	977

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💛 - Coveralls

[nstarman]

This only includes a few modules in the mypyc compilation. We should be able to add more.

[Copilot]

Pull request overview

This PR introduces mypyc compilation support to the plum-dispatch package to improve performance by compiling critical Python modules to C extensions. The changes include configuring the build system for mypyc, updating CI/CD workflows to build and test compiled wheels for multiple platforms, and making necessary code adjustments for mypyc compatibility.

Changes:

• Added mypyc build configuration with hatch-mypyc and cibuildwheel for cross-platform wheel builds
• Introduced COMPILED flag to detect if the package is running as compiled code
• Fixed type compatibility issues for mypyc compilation (bool wrapping, frozenset conversion)

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pyproject.toml	Adds mypyc and cibuildwheel configuration, test markers, and build dependencies
src/plum/init.py	Implements COMPILED flag to detect mypyc-compiled modules
src/plum/_resolver.py	Wraps return values with bool() for mypyc type inference compatibility
tests/test_method.py	Fixes type mismatch by wrapping sets with frozenset()
tests/test_resolver.py	Marks test incompatible with mypyc (uses monkeypatch on compiled module)
.github/workflows/publish.yml	Complete rewrite to build both pure Python and mypyc-compiled wheels, use trusted publishing
.github/workflows/ci.yml	Adds mypyc wheel testing job, updates actions versions and coverage paths
noxfile.py	Fixes pylint path from "plum" to "src/plum"

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[nstarman]

@wesselb the more we can get into mypyc the faster things should get!

[wesselb]

@nstarman Let's go! That's awesome.

Do we need to somehow test publish.yml or are you fairly confident that it does what it needs to do? How about we merge this and immediately release a new version to test?

[nstarman]

Yeah, I'm not entirely sure how to test publish.yml except by trying it...
I tried basing it off of black's setup.

[wesselb]

Let's go for it and see what happens!

[wesselb]

After a bit of trial and error, I think the builds succeeded! :)

[nstarman]

Excellent. Now we can a todo to feed more modules to mypyc.