Getting back to testing patches on qa.guix.gnu.org

[Christopher Baines]

Hey!

Two weeks ago I disabled the qa-frontpage submitting builds for patches
[1] since there wasn't much point continuing to submit the builds while
the bordeaux build farm caught up with the merge.

1: 
https://git.savannah.gnu.org/cgit/guix/maintenance.git/commit/?id=6343780896fcdfdeccfbaf9ef407ceb4641f33b7

Unfortunately, I'm still waiting for it to catch up, you can see the
substitute availability numbers for yourself here [2].

2: https://qa.guix.gnu.org/branch/master

After the core-updates merge, there's also been a mesa update and the
merge of rust-team, both of which involve quite a lot of builds. Plus
things have been a bit bumpy for the bordeaux build farm which doesn't
help. The coordinator has been frequently crashing [3] and the
derivations for i586-gnu have been changing every revision, which slows
down submitting the rest of the builds.

3: https://issues.guix.gnu.org/63368

While I'm continuing to play whac-a-mole with the broken derivation
issues, I think I've managed to resolve the crashing issue with the
build coordinator, so I think the main thing needed is time without any
large rebuilds.

More hardware would of course be helpful, but that's more of a medium
term issue.

Even though there's been discussion about process changes, nothing has
changed yet [4] and commits affecting 300 or more packages according to
guix refresh should still go to staging/core-updates, so there shouldn't
be lots of rebuilds in the coming days anyway.

4: https://guix.gnu.org/manual/devel/en/html_node/Submitting-Patches.html

Thanks,

Chris

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