[PATCH v2 0/8] ci: some housekeeping and modernizations

Hi,

this patch series is a result from the discussions in [1]. It fixes a couple of smaller issues in our CI and bumps jobs that use EOL Docker images to instead use supported ones.

Passing test runs can be found at [2] and [3] for GitLab and GitHub, respectively.

Note that I've also merged the Meson changes (ps/meson-improvements at ce4a600322 (gitlab-ci: fix hanging MSVC jobs, 2026-09-24)) in there so that GitLab passes, but those are not strictly required as a dependency.

Changes in v2:
  - Improve commit messages.
  - Rework the "linux-reftable" job to be more useful instead of
    dropping it.
  - Link to v1: https://patch.msgid.link/20261008-pks-ci-housekeeping-v1-0-baf015c589c0@pks.im

Thanks!

Patrick

[1]: <20260906151137.GA328152@coredump.intra.peff.net> [2]: https://gitlab.com/gitlab-org/git/-/merge_requests/687 [3]: https://github.com/git/git/pull/2445

---
Patrick Steinhardt (8):
      t5004: skip SHA-1-only test in SHA-256 repository
      ci: fix "fedora-breaking-changes-meson" job
      ci: drop unused "linux-clang" logic
      ci: switch away from unsupported i386/ubuntu image
      ci: rename linux-TEST-vars job
      ci: switch away from EOL'd Ubuntu version in linux-exotic
      ci: drop now-dead Python 2 coverage
      ci: improve reftable test coverage

 .github/workflows/main.yml      | 11 ++++-------
 .gitlab-ci.yml                  | 11 ++++-------
 ci/install-dependencies.sh      |  8 ++------
 ci/lib.sh                       | 13 ++-----------
 ci/run-build-and-tests.sh       | 14 +++++++-------
 t/t5004-archive-corner-cases.sh |  2 +-
 6 files changed, 20 insertions(+), 39 deletions(-)

Range-diff versus v1:

1:  654fa99d33 ! 1:  61d0ab3180 t5004: skip SHA-1-only test in SHA-256 repository
    @@ Commit message
         bit `long`, unzip with 64-bit support and it only runs when EXPENSIVE is
         enabled. Consequently, not a lot of jobs even exercise this.
     
    -    One of the jobs that does run it though our Fedora-based job, as it
    +    One of the jobs that does run it though is our Fedora-based job, as it
         ticks all the necessary boxes. But that job was silently broken: while
         the intent was to run on Fedora with breaking changes enabled, they are
         in fact disabled due to a typo.
2:  c75705d4c3 = 2:  d3bef5a21e ci: fix "fedora-breaking-changes-meson" job
3:  1d74ddf095 = 3:  e6d5135719 ci: drop unused "linux-clang" logic
4:  8c1d17e976 ! 4:  21a32d6f33 ci: switch away from unsupported i386/ubuntu image
    @@ Commit message
     
         The linux32 job is used to exercise Git on a 32 bit platform. That job
         uses i386/ubuntu:20.04 though, and that version of Ubuntu is end of life
    -    nowadays. Furthermore, Ubuntu has dropped support for 32 bit entirely
    -    with the 20.04 release, so we cannot easily upgrade it to a more recent
    -    image anymore.
    +    nowadays. Furthermore, Ubuntu 20.04 is the last release that has support
    +    for 32 bit, so we cannot upgrade the image to a later version, either.
     
         Switch the job over to use i386/debian instead. Note that starting with
         Debian 13, support for i386 has been reduced [1]. But Debian still
5:  4b919ad40e = 5:  01496b2238 ci: rename linux-TEST-vars job
6:  ab371f734c = 6:  f248065fb5 ci: switch away from EOL'd Ubuntu version in linux-exotic
7:  d0ff091832 = 7:  1148ebcab3 ci: drop now-dead Python 2 coverage
8:  2b0df6d4a2 < -:  ---------- ci: drop redundant linux-reftable job
-:  ---------- > 8:  71c2422b22 ci: improve reftable test coverage

--- base-commit: 8e383dedc6bbc4fd7bbb203512fbf2eafc151e04 change-id: 20261008-pks-ci-housekeeping-4cf7fac3b0df