setuptools version

setuptools==75.8.1

Python version

python3.10

OS

windows

Additional environment information

Description

We have packages using pyproject.toml of the form:

something.module that use implicit namespaces for something

The latest 75.8.1 seems to rename the something.module-1.2.3.dist-info to be instead: something_module-1.2.3.dist-info

rolling back to 75.8.0 this problem does not exist.

This breaks folks using something of the form pkg_resources.require('something.module') as it now only works if they have pkg_resources.require('something-module')

Expected behavior

packages should continue to have the something.module form

How to Reproduce

git clone https://github.com/krpatter-intc/setuptools-example.git
cd setuptools-example
python -m build

And you'll note the naming difference in the wheel (and the .dist-info file)

You can then run:

import pkg_resources
pkg_resources.require("something.module") # this now throws an exception

Output

I'm aware pkg_resources is on its way out, but this still feels bad that the package has a new name. I'm not sure what the new equivalent/replacement for pkg_resources.require is.