python-black does not build on EPEL 9, it's missing several build dependencies:

No matching package to install: 'python3dist(hatch-fancy-pypi-readme)'
No matching package to install: 'python3dist(hatch-vcs)'
No matching package to install: 'python3dist(hatchling) >= 1.8'

(In reply to Christian Heimes from comment #1)
> python-black does not build on EPEL 9, it's missing several build
> dependencies:
> 
> No matching package to install: 'python3dist(hatch-fancy-pypi-readme)'
> No matching package to install: 'python3dist(hatch-vcs)'
> No matching package to install: 'python3dist(hatchling) >= 1.8'

The situation is changing. In bug 2158497, Martin Hoyer showed me that a few dependencies could be safely loosened to open a path to packaging current versions of python-hatchling and python-hatch-vcs in EPEL9, along with hatch itself. See https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2023-d689ae7c5f, which is in epel-testing for another week.

> $ fedpkg --release epel9 mockbuild --enablerepo=epel-testing
> 
> No matching package to install: 'python3dist(hatch-fancy-pypi-readme)'

Once the update with current python-hatchling hits EPEL9, https://src.fedoraproject.org/rpms/python-hatch-fancy-pypi-readme could be branched for EPEL9 too.

If I add a local EPEL9 build of python-hatch-fancy-pypi-readme:

> $ mock -r epel-9-x86_64 --clean && mock -r epel-9-x86_64 -i ~/fedora/other/python-hatch-fancy-pypi-readme/results_python-hatch-fancy-pypi-readme/22.3.0/6.el9/python3-hatch-fancy-pypi-readme-22.3.0-6.el9.noarch.rpm --enablerepo=epel-testing && fedpkg --release epel9 mockbuild --enablerepo=epel-testing --no-clean
>
> No matching package to install: 'python3dist(packaging) >= 22'
> No matching package to install: 'python3dist(tokenize-rt) >= 3.2'
> No matching package to install: 'python3dist(uvloop) >= 0.15.2'

OK, python-packaging is in the base OS, so it’s a question of whether the minimum version could safely be loosened. The python-uvloop dependency comes from the uvloop extra, which could be disabled for EPEL9 (adding it to EPEL9 is bug 2130665). The python-tokenize-rt dependency comes from the jupyter extra, which could be disabled for EPEL9, or perhaps it could be branched for EPEL9—I haven’t tested it.

If I disable both of those extras and blindly loosen the packaging dependency lower version bound to 20.9, the package builds in mock with only one test failure:

=================================== FAILURES ===================================
___________________ BlackTestCase.test_infer_target_version ____________________

self = <tests.test_black.BlackTestCase testMethod=test_infer_target_version>

    def test_infer_target_version(self) -> None:
        for version, expected in [
            ("3.6", [TargetVersion.PY36]),
[…]
            (">3.10,<3.11", None),
        ]:
            test_toml = {"project": {"requires-python": version}}
            result = black.files.infer_target_version(test_toml)
>           self.assertEqual(result, expected)
E           AssertionError: [<TargetVersion.PY310: 10>, <TargetVersio[35 chars] 12>] != None

tests/test_black.py:1575: AssertionError

Maybe this came from blindly loosening the packaging version. I’m not sure how serious the failure is.

Anyway, hopefully that’s helpful as an outline of how this *might* be possible.

I've bee tagged needinfo, but I'm not sure what info is needed from me...

As to the dependencies, I'd expect the package maintainer to know better than I which elements can be relaxed, which can be excluded, and which ones need epel branches requested.