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doc: Add "Addressing Issues" section. 

* doc/contributing.texi (Addressing Issues): New section.

Co-authored-by: Christopher Baines <mail@cbaines.net>
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Ludovic Courtès 2021-05-24 22:16:23 +02:00
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@ -1419,6 +1419,45 @@ you're confident, it's OK to commit.
That last part is subject to being adjusted, allowing individuals to commit
directly on non-controversial changes on parts they’re familiar with.
@subsection Addressing Issues
Peer review (@pxref{Submitting Patches}) and tools such as
@command{guix lint} (@pxref{Invoking guix lint}) and the test suite
(@pxref{Running the Test Suite}) should catch issues before they are
pushed. Yet, commits that ``break'' functionality might occasionally
go through. When that happens, there are two priorities: mitigating
the impact, and understanding what happened to reduce the chance of
similar incidents in the future. The responsibility for both these
things primarily lies with those involved, but like everything this is
a group effort.
Some issues can directly affect all users---for instance because they
make @command{guix pull} fail or break core functionality, because they
break major packages (at build time or run time), or because they
introduce known security vulnerabilities.
@cindex reverting commits
The people involved in authoring, reviewing, and pushing such
commit(s) should be at the forefront to mitigate their impact in a
timely fashion: by pushing a followup commit to fix it (if possible),
or by reverting it to leave time to come up with a proper fix, and by
communicating with other developers about the problem.
If these persons are unavailable to address the issue in time, other
committers are entitled to revert the commit(s), explaining in the
commit log and on the mailing list what the problem was, with the goal
of leaving time to the original committer, reviewer(s), and author(s)
to propose a way forward.
Once the problem has been dealt with, it is the responsibility of
those involved to make sure the situation is understood. If you are
working to understand what happened, focus on gathering information
and avoid assigning any blame. Do ask those involved to describe what
happened, do not ask them to explain the situation---this would
implicitly blame them, which is unhelpful. Accountability comes from
a consensus about the problem, learning from it and improving
processes so that it's less likely to reoccur.
@subsection Commit Revocation
In order to reduce the possibility of mistakes, committers will have