python-tag is not recognized when specified in setup.cfg

[bgermann]

I try to build a wheel with setup.cfg containing

[bdist_wheel]
python-tag = py2.py3

This does not have any effect. E.g., the wheel still has the python tag cp36-cp36m. When I replace scikit-build with setuptools the tag py2.py3 is applied.

[jcfr]

Thanks for reporting the issue.

Seems settings set in setup.cfg are currently ignored. Could you reference here the documentation listing all tags expected to be supported ?

[bgermann]

I do not think all settings in setup.cfg are ignored. I also set

[metadata]
license_file = LICENSE

and it is applied correctly. The possible python-tags are documented in PEP 425.

[jcfr]

Thanks for the follow up.

Would you also have a link to the corresponding documentation for setuptools (or distutils or wheels) ?

How do you currently specify the flag from the command line ?

[bgermann]

https://wheel.readthedocs.io/en/stable/ says "The –universal and –python-tag flags have no effect when used on a project that includes C extension code." -- so maybe that is why. Please close this issue if that is true for scikit-build.

[jcfr]

Thanks for looking up the details 👍 Since having binary wheels compatible with both python2 and python3 is not possible, this is most likely why this flag is not supported.

Before closing, few more questions ..

Would it be helpful if scikit-build report a clear message indicating that this option is not supported with a reference to the wheel documentation ?

I was wondering if would be able to share more details about your use case. Would you be able to share a link to your project ? Does it include compiled modules ?

[bgermann]

Documenting this would be helpful. The project includes a dynamic library that is called via ctypes.

[jcfr]

Would a note in here and here be appropriate ?

Or would it be more helpful for you to get a clear Runtime error with a descriptive message ?

[bgermann]

I think, these places are appropriate for the note.

I would prefer a note over an error because that is aligned with setuptools.