Run PR build and test workflow for all supported python versions

[tobiasdiez]

📚 Description

The Build & Test workflow should run for all supported Python versions (and not only for the latest supported one) to ensure that all changes in src are compatible with the supported eco system.

📝 Checklist

• The title is concise, informative, and self-explanatory.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies

• Drop support for Python 3.8 #35404

[github-actions]

Documentation preview for this PR is ready! 🎉
Built with commit: 0bbcfbe

[tobiasdiez]

@mkoeppe why are these workflows now failing but the corresponding "ci-linux" tests are green? They actually show the same doctest failures, but for some reason this is not taken as a failure. Is this on purpose?

[mkoeppe]

Yes, I made it this way on purpose when I wrote the portability infrastructure back in 2020. At that time, so many platforms were broken in the build phase that I wanted to distinguish successful builds from builds in which "just a few doctests are failing".

But I'd be happy to change it now because we are in much better shape regarding platform support and we do want to catch and fix platform-dependent doctest failures.

[mkoeppe]

This can be done by this change throughout the file:

diff --git a/.github/workflows/ci-linux.yml b/.github/workflows/ci-linux.yml
index aca56f9b49..9f244e7443 100644
--- a/.github/workflows/ci-linux.yml
+++ b/.github/workflows/ci-linux.yml
@@ -52,10 +52,9 @@ jobs:
       free_disk_space: true
       from_docker_repository: ghcr.io/${{ github.repository }}/
       from_docker_target: "with-targets-pre"
-      docker_targets: "with-targets with-targets-optional"
+      docker_targets: "with-targets"
       # FIXME: duplicated from env.TARGETS
-      targets: build doc-html
-      targets_optional: ptest
+      targets: build doc-html ptest
       tox_packages_factors: >-
           ["standard"]
       docker_push_repository: ghcr.io/${{ github.repository }}/

[tobiasdiez]

Surpassed by #36373