Windows PyPy fails to find an interpreter

[henryiii]

Windows 64-bit PyPy fails to find an interpreter - Linux and macOS (both archs) are fine. Example: tox-dev/pyproject-fmt-rust#11

It works with cibuildwheel, so I think it's an issue with the action.

[messense]

Can you try install them via setup-python action before calling this action?

[henryiii]

Yes, I tried that previously, but I can repeat it in the PR, just a sec.

[henryiii]

Same: https://github.com/tox-dev/pyproject-fmt-rust/actions/runs/9058486065/job/24884203304?pr=11

[messense]

Probably something has changed in github actions tool cache for PyPy.

maturin-action/src/index.ts

Lines 769 to 779 in b49dce4

	async function addToolCachePythonVersionsToPath(): Promise<void> {
	const allPythonVersions = tc.findAllVersions('python')
	for (const ver of allPythonVersions) {
	const installDir = tc.find('Python', ver)
	if (installDir) {
	core.info(`Python version ${ver} was found in the local cache`)
	core.addPath(installDir)
	core.addPath(path.join(installDir, 'bin'))
	}
	}
	}

[messense]

In the meantime you can try enable generate-import-lib feature of pyo3.

See https://pyo3.rs/v0.21.2/features.html?highlight=generate-import-lib#generate-import-lib

[henryiii]

It's in a PyPy folder: https://github.com/actions/setup-python/blob/main/docs/advanced-usage.md#hosted-tool-cache

[henryiii]

Assuming this the right way to enable it:

[dependencies]
pyo3 = { version = "0.21.2", features = ["abi3-py38", "generate-import-lib"] }

This cause Maturin to simply ignore the pypy jobs completely and only produce the main wheel. The jobs "passes", but only one wheel is produced. Interestingly, the unix jobs still seem fine and produce PyPy wheels.

[messense]

Interesting, might be a bug in maturin, I'll take a look when I have the time.

[henryiii]

Is there a way for me to see the core.info printouts? I'm still not seeing it with the recent update.

[messense]

core.info should be visible by default, so it's simply didn't run.

https://github.com/tox-dev/pyproject-fmt-rust/actions/runs/9068434736/job/24915732974?pr=11#step:3:34 this one does have the output.

[rominf]

I can confirm that the issue is still actual. Unfortunately, specifying the interpreter manually via --interpreter does not help either. I thought it was an issue with the setup-python GitHub Action, so I created two PRs in my fork of setup-python:

• Add a tests for building Python extensions rominf/setup-python#2 – tests for building Python extensions (C extension using setuptools and Rust extension using pyo3 and maturin).
• fix: make link.exe find PyPy's python*.lib rominf/setup-python#1 – setting the LIB environmental variable after installing PyPy on Windows (on top of the PR above).

As you might see, link.exe fails to find python*.lib on Windows with PyPy interpreter requested and setting LIB helps maturin to build the extension. However, I tend to believe that the issue is better solved in maturin or the maturin GitHub Action.

I am open to providing more information or filling another issue if needed.