gh-127359: Pin Tcl/Tk to 8 (8.6) for testing macOS

[hugovk]

• Issue: macOS CI is failing for 3.13 due to Tcl/Tk 9 on Homebrew #127359

[vstinner]

I don't know brew: what is this new brew link tcl-tk@8 command? brew install is not enough? Maybe add a comment to explain it?

[hugovk]

Because tcl-tk@8 is an alternative version and not the latest, it installs as so-called "keg-only", which means it doesn't get symlinked into the usual paths:

❯ brew info tcl-tk@8
==> tcl-tk@8: stable 8.6.15 (bottled) [keg-only]
Tool Command Language
https://www.tcl-lang.org
Installed
/opt/homebrew/Cellar/tcl-tk@8/8.6.15 (3,069 files, 35.7MB)
  Poured from bottle using the formulae.brew.sh API on 2024-11-28 at 14:38:32
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/t/tcl-tk@8.rb
License: TCL
==> Dependencies
Required: openssl@3 ✔
==> Caveats
The sqlite3_analyzer binary is in the `sqlite-analyzer` formula.

tcl-tk@8 is keg-only, which means it was not symlinked into /opt/homebrew,
because this is an alternate version of another formula.

If you need to have tcl-tk@8 first in your PATH, run:
  echo 'export PATH="/opt/homebrew/opt/tcl-tk@8/bin:$PATH"' >> ~/.zshrc

For compilers to find tcl-tk@8 you may need to set:
  export LDFLAGS="-L/opt/homebrew/opt/tcl-tk@8/lib"
  export CPPFLAGS="-I/opt/homebrew/opt/tcl-tk@8/include"

For pkg-config to find tcl-tk@8 you may need to set:
  export PKG_CONFIG_PATH="/opt/homebrew/opt/tcl-tk@8/lib/pkgconfig"
==> Analytics
install: 12,709 (30 days), 12,737 (90 days), 12,738 (365 days)
install-on-request: 280 (30 days), 310 (90 days), 310 (365 days)
build-error: 8 (30 days)

Perhaps a comment like?

        brew install pkg-config openssl@3.0 xz gdbm tcl-tk@8 make
        # Because alternate versions are not symlinked into place by default:
        brew link tcl-tk@8

[vstinner]

LGTM. You might add a comment on brew link or not, it's up to you.

[miss-islington-app]

Thanks @hugovk for the PR 🌮🎉.. I'm working now to backport this PR to: 3.12, 3.13.
🐍🍒⛏🤖

[miss-islington-app]

Sorry, @hugovk, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker b83be9c9718aac42d0d8fc689a829d6594192afa 3.13

[miss-islington-app]

Sorry, @hugovk, I could not cleanly backport this to 3.12 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker b83be9c9718aac42d0d8fc689a829d6594192afa 3.12

[bedevere-app]

GH-127393 is a backport of this pull request to the 3.13 branch.

[bedevere-app]

GH-127394 is a backport of this pull request to the 3.12 branch.

[miss-islington-app]

Thanks @hugovk for the PR 🌮🎉.. I'm working now to backport this PR to: 3.9.
🐍🍒⛏🤖

[miss-islington-app]

Thanks @hugovk for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[miss-islington-app]

Thanks @hugovk for the PR 🌮🎉.. I'm working now to backport this PR to: 3.10.
🐍🍒⛏🤖

[miss-islington-app]

Sorry, @hugovk, I could not cleanly backport this to 3.9 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker b83be9c9718aac42d0d8fc689a829d6594192afa 3.9

[miss-islington-app]

Sorry, @hugovk, I could not cleanly backport this to 3.11 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker b83be9c9718aac42d0d8fc689a829d6594192afa 3.11

[miss-islington-app]

Sorry, @hugovk, I could not cleanly backport this to 3.10 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker b83be9c9718aac42d0d8fc689a829d6594192afa 3.10

[bedevere-app]

GH-127407 is a backport of this pull request to the 3.11 branch.

[bedevere-app]

GH-127408 is a backport of this pull request to the 3.10 branch.

[bedevere-app]

GH-127409 is a backport of this pull request to the 3.9 branch.