cargo: add support for GitLab

[yamader]

Added GitLab support to cargo.py.
Additional tests have not yet been written, but the tests that already exist have passed.

As for demand, the following project uses (self-hosted) GitLab.
https://github.com/pop-os/xdg-desktop-portal-cosmic/blob/41c1e7c/Cargo.lock#L4633

[mgorny]

I'm sorry for replying this late.

[yamader]

Thank you for reviewing my poor code.
I have fixed the issues you pointed out.

The py3.9 test fails because I used a match statement, but py39 has been dropped in the latest pycargoebuild ebuild.
Please let me know if it would be better to rewrite it to be compatible.

[mgorny]

I think py3.10+ is fine but please update GHA and tox.ini.

[mgorny]

…and pyproject.toml.

[yamader]

fixed.

[mgorny]

Thanks. But please extend test_cargo to cover the new possible URLs. You can also extend integration_tests, but I can do that for you if you don't want to figure them out.

[yamader]

I added a test for this PR.

It was difficult to find a good example of using gitlab.com, but there are many projects using self-hosted GitLab, such as pop-os/cosmic-* and YaLTeR/niri, mainly for desktop systems.

However, complete support for self-hosted GitLab that can be built directly by running pycargoebuild cannot be achieved without updating cargo.eclass, but I would like to work on that separately.

[mgorny]

Actually, adding a test to test_cargo.py is more important than integration tests.

[yamader]

Added. Please forgive my stupidity.

[mgorny]

Thank you. I think I'll test it a little more, and merge.