[Webkit-unassigned] [Bug 253421] REGRESSION(261097 at main) [Win] test-webkitpy: Failed to install pytest-asyncio-0.20.3!

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=253421

--- Comment #1 from Fujii Hironori <Hironori.Fujii at sony.com> ---
There are two problems.
setup.cfg of pytest-asyncio-0.20.3 is using attr for version.

> version = attr: pytest_asyncio.__version__

https://github.com/pytest-dev/pytest-asyncio/blob/v0.20.3/setup.cfg#L3

So, setuptools tries to load pytest_asyncio.
It imports pytest. But, it fails to load pytest because pytest isn't installed yet.

> import pytest
https://github.com/pytest-dev/pytest-asyncio/blob/v0.20.3/pytest_asyncio/plugin.py#L27

On Linux, however, setuptools doen't try to load pytest_asyncio because it already knows version.
https://github.com/pypa/setuptools/blob/v56.0.0/setuptools/config.py#L213-L214

This is a test program.

> import setuptools
> print(setuptools.__version__)
> dist = setuptools.Distribution()
> print(dist.metadata.version)

Use WebKit's autoinstalled setuptools:

> export PYTHONPATH=/webkit/Tools/Scripts/libraries/autoinstalled/python-3-x86_64

Unpack pytest-asyncio-0.20.3.tar.gz, and place the test program in the top directory that has setup.cfg.
And, invoke 'python test.py'

With Windows Python, it doesn't know the dist.metadata.version.

> 56.0.0
> None

With Linux Python, it knows the dist.metadata.version.

> 56.0.0
> 0.20.3

I don't know the reason of this difference.

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