Subpath

[mamico]

This PR was initially created to implement the subpath option for monorepos—Git projects with Python packages in a subpath (such as those generated with cookieplone).

You can review the initial changes here:
Comparison Link

Additionally, I've added GitHub Actions (GHA) for automated testing (https://github.com/mamico/mr.developer/actions)

• Document the subpath option
• Add tests for subpath
• Review and fix broken tests for Python > 3.7 (currently commented out)

@fschulze @mauritsvanrees A possible idea could be to move this project to the collective organization. What do you think?

[mauritsvanrees]

Sorry, I have been unable to make time for this the past months.

Thanks! I did not try it for real, but the change looks good.

Thanks for picking up gh-actions as well. They don't run yet though. I have added inline suggestions that might work. It would be fine with me to drop support for Python 3.8 and lower.

Locally the tests fail though, due to recent setuptools 80.2.0. And 80.0.0 gives problems with Buildout anyway, so we will want to avoid that as well. (I have PRs in zc.buildout ready for that.)

So in tox.ini in [base] deps please add this line:

    setuptools<80

Then it goes much better locally, once I install svn and mercurial. I see two failures on 3.12, but maybe that is something local, so it would be good to see the test result here on GitHub.