Improve packaging [PEP 517 + 621]

[cdce8p]

Description

Similar to pylint-dev/pylint#7076

• Use isolated build environments PEP 517 with python -m build instead of deprecated python setup.py sdist bdist_wheel
• Move project metadata from setup.cfg to pyproject.toml PEP 621
• Cleanup MANIFEST.in -> entries haven't been used.
• Add README.rst to MANIFEST.in. Required to be able to build the wheel from sdist and still include the readme text in the project metadata.

Metadata diff

-Author: Python Code Quality Authority
-Author-email: code-quality@python.org
+Author-email: Python Code Quality Authority <code-quality@python.org>
...
-Home-page: https://github.com/PyCQA/astroid
+Project-URL: Source Code, https://github.com/PyCQA/astroid
...
+Project-URL: Docs, https://pylint.pycqa.org/projects/astroid/en/latest/
...
-Platform: UNKNOWN

Notes

• README.rst should be included in sdist to build wheel successfully. Without MANIFEST.in, README.rst would be added automatically. Let's add it manually, just in case something else is added to MANIFEST.in later.
• Platform isn't used currently / anymore
• Home-page was defined with url. I've moved it to project.urls and renamed it to Source Code.
• Added project.url for Docs

[coveralls]

Pull Request Test Coverage Report for Build 2579380559

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.339%

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Totals
Change from base Build 2562030096:	0.0%
Covered Lines:	9426
Relevant Lines:	10208

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💛 - Coveralls

[Pierre-Sassoulas]

Great !

[DanielNoord]

Should we add 3.11 as well?

[Pierre-Sassoulas]

Hmm nice catch, I think we forgot to add it in #1584

Suggested change

	"Programming Language :: Python :: 3.10",
	"Programming Language :: Python :: 3.10",
	"Programming Language :: Python :: 3.11",

[cdce8p]

Should we add 3.11 as well?

We don't support all 3.11 features yet. Especially support for TryStar is still missing. Tracking issue #1516
I should probably continue the work on #1389 soon. With that TryStar should be fairly strait forward.

[Pierre-Sassoulas]

I think we should add the 3.11 metadata before supporting all 3.11 features, because we're supporting all the old features and if we don't do that, then there's no astroid at all for 3.11 which is a lot worse than having astroid without some 3.11 exclusive features.

[cdce8p]

I think we should add the 3.11 metadata before supporting all 3.11 features, because we're supporting all the old features and if we don't do that, then there's no astroid at all for 3.11 which is a lot worse than having astroid without some 3.11 exclusive features.

We don't block anyone from installing astroid with Python 3.11.
However, the way I understand the classifier is "All of the features (or at least the major ones) for version x.xx are supported." That's why I would recommend to wait a bit longer before adding it.

[Pierre-Sassoulas]

We don't block anyone from installing astroid with Python 3.11.

Hmm right, my bad, pip is using install_require not the metadata.

[cdce8p]

After the issue with dependabot in pylint, I've added back setup.py here. At least for now, it seems like it's still required.