python 3.10.0

[Moisan]

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• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

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First try with Python 3.10.0 release candidate 1. https://www.python.org/downloads/release/python-3100rc1/

Audit currently fails with

  * Versioned formulae in homebrew/core should use `keg_only :versioned_formula`
  * Stable version URLs should not contain rc1

Note that, compared to python@3.9, I removed the decimal diff since I couldn't find the one for for Python 3.10.

Release candidate 2 is scheduled for Monday, 2021-09-06.

[branchvincent]

i believe both audits can be ignored by updating versioned_keg_only_allowlist and unstable_allowlist

[cho-m]

Looks like release candidate successfully builds, but CI probably won't find any dependents due to versioned depends_on "python@3.9" (~582 formulae).

[iMichka]

Yes. If we want to test this correctly, we need to Rev bump all these 582 formulae and update the Python 3.9 dependency to 3.10. In 582 separate commits.

[Moisan]

👍 I'll first try all formulae that are in brew uses python@3.9 and we'll see how it goes.

[cho-m]

Sounds good as remaining will require CI-build-dependents-from-source to correctly test.

May need to use Self-Hosted Linux given how long Python 3.9.7 CI took.

EDIT: Looks like a bit more find-replace is required as some formulae have multiple version references

[Moisan]

A few issues that I spotted based on the current ARM failures (138 fails):

• Python 3.10 removes bdist_wininst. setup_tools removed it in version v55.0.0. Some formulae that were bumped in this PR uses a version of setuptools resource that is older than that, which leads to build failure.
• poetry next release should support Python 3.10
• sphinx-doc 4.2.0 (next release) should support Python 3.10

[branchvincent]

sphinx-doc fix landed with #85095

[Moisan]

I rebased on master and updated to Python 3.10rc2.

[branchvincent]

sip just released 3.10 support, landed in #86393

[Moisan]

Python 3.10 should officially be released today. My plan is to follow the previous python@3.9 migration pattern:

• Merge python@3.10 and python-tk@3.10 within this PR
• Open individual PR for independent formulae first: depend on python@3.9 only directly and have no reverse dependencies. I can probably write a script to do that automatically.
• Migrate other formulae

[cclauss]

Python 3.10.0 source is now available at https://www.python.org/ftp/python/3.10.0/

[branchvincent]

match statement, here we come!

[BrewTestBot]

@branchvincent has triggered a merge.

[BrewTestBot]

⚠️ @branchvincent bottle publish failed.

bottle publish failed

[branchvincent]

oops, forgot --no-autosquash

[BrewTestBot]

@branchvincent has triggered a merge.

[carlocab]

Have we made python@3.9 keg-only?

[branchvincent]

i guess we need to migrate the aliases as well as make python@3.9 key-only. let me do that