Upgrade nox-poetry to use poetry 1.2 / py38+

[staticdev]

@cjolowicz I created this proposal solution to make nox-poetry work with poetry 1.2+.

The most important problem is that a project with flake8 cannot be installed together with poetry 1.2 on python 3.7. They have unsolvable importlib_metadata restrictions. Flake8 will not create a new version to fix that, so I instead raised the minimum version of python to 3.8. This enables dependency upgrades for the foreseeable future.

[cjolowicz]

Thanks for working on this!

I've two issues with this:

• I don't like breaking Poetry 1.1 yet (especially not for a warning).
• I'm not comfortable dropping Python 3.7 before its EOL.

These dependencies are only used for development. Can we use environment markers to require Python 3.8? We'd lose testing for Python 3.7 though, I'm not sure how I feel about that.

As for Poetry 1.1, we'd need to find out which version we have, and use the invocation that's compatible with it.

[staticdev]

@cjolowicz I think first issue is the easier one, we can continue using --dev and we continue with the warning on 1.2.

For python 3.7, I argued with flake8 developers and they will not change anymore to maintain compatibility with importlib_metadata. I am not aware of a way to restrict to python 3.8 just for dev dependencies, maybe is a good solution.

My 50 cents, there is still 7 months until EOL of Py3.7, honestly it don't think it is worth extra effort to keep support since we have Python 3.11 now and supporting 4 minor versions is already ahead of 95% of all open and closed-source projects I know. Also migration from Python 3.7 to 3.8 is very smooth compared to previous upgrades from Python I've seen before.

Of course, you are the lead here, so it is your call.

[staticdev]

UPDATE: I rebased my PR. It works now with poetry 1.0.0+ again. At the cost of not closing #873 anymore.

[johnthagen]

FWIW, Python 3.7 goes end of life tomorrow, so perhaps nox-poetry can drop support then

• https://endoflife.date/python

[cjolowicz]

FWIW, Python 3.7 goes end of life tomorrow, so perhaps nox-poetry can drop support then

• https://endoflife.date/python

I've added an environment marker to restrict Flake8 and plugins to Python >= 3.8, so this should no longer be an issue. See #1118

[edgarrmondragon]

Superseded by #1213 and #1225