Drop support for Python 3.7

[ghykk]

Due to the pinning of packaging at https://github.com/ido50/morgan/blob/2c5ba7c45b80adb9ac57cdf93a0eb54469f242ad/pyproject.toml#L19

Python 3.7 is no longer supported, and the required Python version should be bumped up to 3.8. The rest of the [dependencies] section can therefore be simplified.

[ido50]

Hmm, I had not noticed that packaging 24.2 requires Python >= 3.8. Supporting 3.7 is actually critical for me, restricted environments are often extremely slow to upgrade and I had no intention of dropping this support. I'd much rather downgrade packaging instead.

[ghykk]

Based on the comments left around the minimum version bump for packaging, I think the solution is to restrict the maximum version for hatchling.

On a side note, I caught the issue through uv when it failed to fulfil the dependency constraints, it might be helpful to use something similar to catch these issues early.

[grische]

@ido50 are you still running this with Python 3.7? According to ruff, the latest version is not 3.7 compatible anymore:

# ruff check morgan/
morgan/__init__.py:271:12: SyntaxError: Cannot use named assignment expression (`:=`) on Python 3.7 (syntax was added in Python 3.8)
    |
270 |     def _matches_environments(self, fileinfo: dict) -> bool:
271 |         if req := fileinfo.get("requires-python", None):
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
272 |             # The Python versions in all of our environments must be supported
273 |             # by this file in order to match.
    |

Found 1 error.

[grische]

I was also unable to install the dependencies using Python 3.7, as
Packging 24.1 Requires-Python >=3.8;

https://github.com/ido50/morgan/blob/2c5ba7c45b80adb9ac57cdf93a0eb54469f242ad/pyproject.toml#L16-L24

See attempted build log here: https://github.com/grische/morgan/actions/runs/17944579234/job/51027851395

I think it's safe to assume that morgan does not work with Python 3.7 anymore as of today.

[ido50]

If we were to eliminate the := syntax in line 271 and perhaps downgraded hatchling, it seems that we'd still be able to support 3.7. Would we lose something important? Any functionality broken?

There's been a lot of good work done on morgan recently and I'd at least like to have a version that supports 3.7 with these changes before we officially move up to >=3.8. This way 3.7 users who are unable to upgrade Python yet will at least have a fully working version of morgan with all the latest bells and whistles.

It really doesn't seem to me that morgan itself needs 3.8 to work.

What do you guys think?

[grische]

@ido50 I did the necessary changes to the code, the pyproject.toml and the CI to make Morgan compatible with Python 3.7 again. See #73 .