[6.5.x] Packages containing dots are renamed to use dashes

[Jorricks]

Environment Versions

1. OS Type: MacOs
2. Python version: Python 3.8.11
3. pip version: pip 22.0.3
4. pip-tools version: pip-compile, version 6.5.1

Steps to replicate

1. Create a file requirements file containing zope.event
2. pip-compile
3. Output contains zope-event

Expected result

The compiled file should contain zope.event as zope-event does not exist.

Actual result

It contains zope.event

Why is this an issue?

When you have a setup.py pointing to your compiled requirements file, you can not use console_scripts anymore.
Because when you try to run my entry_point console_scripts, you will get an error similar to:

pkg_resources.DistributionNotFound: The 'zope-event==4.5.0' distribution was not found and is required by my_package

[AndydeCleyre]

I'd like to close this in favor of centralizing this discussion at #1576

See also: pypa/setuptools#3157

[Jorricks]

I completely missed that one. Thank you