Is it possible to control compression for wheels built with the help of build frontend?

[KOLANICH]

I'd like to be able to create wheels without compression - I'll still will install them on the same machine using pip after that. I have tried -C--compression=stored without any success. python3 ./setup.py bdist_wheel --compression=stored worked as intended.

I am not very sure whoose bug it is, setuptool's, or wheel's, but there are other build backends, and, so to control what compression is used, an interface at least is needed.

[gaborbernat]

This is not possible per packaging standards python adopted. The pep 517 clearly states both sdist and wheel must be compressed via tar.gz and zip format respectively.

https://www.python.org/dev/peps/pep-0517/#build-sdist

[KOLANICH]

It doesn't say anything about compression within wheels.

[gaborbernat]

Because that's already defined as zip within the earlier https://www.python.org/dev/peps/pep-0427/#abstract

[layday]

They are asking if they can change the compression level - not the format. You can do this with python -m build -w -C--global-option=--compression -C--global-option=stored but the fact that it works is a bit of an accident.

[KOLANICH]

@layday, thank you. that works (for setuptools-based projects). -C "--global-option=--compression=stored" though doesn't, and it is a bug in setuptools, that worths fixing.

@gaborbernat, it still would make sense to define a single interface to control compression in wheels in all backends. The easiest to implement way is, of course, an env variable read from wheel directly, so jo support in third-party tools is needed, but I don't think it is the correct way.

[layday]

Flit and Poetry don't even use the wheel package - there is no path to adding a generic wheel compression option.

@layday, thank you. that works (for setuptools-based projects). -C "--global-option=--compression=stored" though doesn't, and it is a bug in setuptools, that worths fixing.

• Setuptools does not pass config_settings through backend setuptools#2491
• Accept string in PEP 517 config_settings setuptools#2528