Re: Re* [RFH] adding test coverage for contrib/ in CI jobs

Junio C Hamano [off-list ref] writes:

Colin Stagner [off-list ref] writes:
...

quoted

At least some of the subtree failures on linux-reftable, such as

<https://github.com/git/git/actions/runs/21617099884/job/62298228602#step:10:421>

are actually due to a bug in ubuntu:rolling's "dirname" implementation. 

Ahh, rust bites again?

Is there /etc/alternatives/dirname like /etc/alternatives/sudo that
we used in fddb4842 (ci: fix broken jobs on Ubuntu 25.10 caused by
switch to sudo-rs(1), 2025-10-10) to work a breakage around, I have
to wonder...

So I tried a custom CI run that has

 * a temporary patch that demotes ubuntu:rolling to ubuntu:latest in
   GitHub workflows

 * your subtree test fix to use the hardcoded 'main'

 * a similar fix for diff-highlight test <xmqq7bstsemv.fsf@gitster.g>

 * a change to run "make test" in contrib/* directories <xmqqjywuyhu9.fsf@gitster.g>

on top of 'master'.  Everything seems to be happy.      

https://github.com/git/git/actions/runs/21726017981