Re: [PATCH] ci: bump debian-11 job to debian-12

[Patrick Steinhardt <ps@pks.im>]

On Sat, Sep 05, 2026 at 09:58:22AM -0400, Jeff King wrote:
> Debian 11 just recently went out of its LTS period, and is unmaintained
> by the project (there is "Extended LTS", but it is a paid service
> provided by a third party).
> 
> The point of the debian-11 job was to cover older releases in the LTS
> state, per ac112fd4f0 (Add additional CI jobs to avoid accidental
> breakage, 2024-10-31). Bumping to debian-12 will cover us there for the
> next 2 years.
> 
> Signed-off-by: Jeff King <peff@peff.net>
> ---
> I started looking at this because I got an apt failure on a debian-11
> job today. It might have just been a transient mirror failure (although
> it reproduced for several minutes afterwards). But this seems like the
> right step forward anyway.

I noticed that the Debian jobs became flaky lately, too.

> I tested the GitHub job, but not the GitLab one. They should be pulling
> the same docker images, though, so I would expect it to Just Work.

Yeah, same.

> diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
> index 205325eb33..a0c3f53c6d 100644
> --- a/.github/workflows/main.yml
> +++ b/.github/workflows/main.yml
> @@ -411,9 +411,9 @@ jobs:
>          # A RHEL 8 compatible distro.  Supported until 2029-05-31.
>          - jobname: almalinux-8
>            image: almalinux:8
> -        # Supported until 2026-08-31.
> -        - jobname: debian-11
> -          image: debian:11
> +        # Supported until 2028-06-30.
> +        - jobname: debian-12
> +          image: debian:12
>      env:
>        jobname: ${{matrix.vector.jobname}}
>        CC: ${{matrix.vector.cc}}
> diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
> index 0242283c3c..cd6fd4a504 100644
> --- a/.gitlab-ci.yml
> +++ b/.gitlab-ci.yml
> @@ -71,9 +71,9 @@ test:linux:
>        # A RHEL 8 compatible distro.  Supported until 2029-05-31.
>        - jobname: almalinux-8
>          image: almalinux:8
> -      # Supported until 2026-08-31.
> -      - jobname: debian-11
> -        image: debian:11
> +      # Supported until 2028-06-30.
> +      - jobname: debian-12
> +        image: debian:12
>    artifacts:
>      paths:
>        - t/failed-test-artifacts

The changes look good, but I wonder whether we want to swap to the
"oldstable" tag instead. That points to debian-12, too, and might result
in less churn going forward.

Patrick