Bug#1053641: transition: libavif

[Boyuan Yang <byang@debian.org>]

X-Debbugs-CC: malat@debian.org

在 2023-10-07星期六的 20:32 +0200，Sebastian Ramacher写道：
> Control: tags -1 confirmed
> 
> On 2023-10-07 14:06:44 -0400, Boyuan Yang wrote:
> > I am looking at starting the transition for package libavif,
> > which comes with a SONAME bump
> > (libavif15, v0.11.1-3 (sid) -> libavif16, v1.0.1-1 (exp)).
> > 
> > * jpeg-xl (Current version FTBFS unconditionally due to a different reason
> > in Testing/Sid; my NMU fix just accepted in Sid)
> > 
> > Do we need to wait till my NMU-ed jpeg-xl to migrate to Testing before
> > starting the libavif transition?
> 
> No, that's not necessary. Please go ahead.

Alright, here comes the tricky part.

In the test build of reverse build-dependencies, only amd64 builds are examined.
Now, the rebuilt jpeg-xl has some new FTBFS on other architectures; and while some
issues are easy to solve (e.g., missing <cmath> header for arm64), some issues are
not (like the new test failures for i386 and s390x) [1].

Probably I uploaded the libavif/1.0.1-1 to Sid too soon; and while I tried to cancel
the upload with "dcut rm" and "dcut cancel", these commands never successfully
intercept the upload ("no such upload found", "no file to delete", etc), and we are
having the new libavif in Sid now to trigger the transition. This is the worst
condition we could have, though I consciously tried to avoid it :-(

I am now wondering what would be the best way to get this transition done in a sane
way. A few choices in my mind:

(1) Make a sloppy upload to jpeg-xl in Sid to ignore post-build testing errors (and
possibly newly-emerged autopkgtest errors, if any?) so that the libavif transition can
finish, and count on the upcoming jpeg-xl (0.7 -> 0.8) transition to correct these
ignored errors;

(2) Fix current jpeg-xl in Sid properly. That won't be too trivial since the new
testing error is likely triggered by some unclear changes in build-dependencies over
the past several months.

(3) Wait till a sane jpeg-xl 0.8 upload (with transition) is ready, and entangle
jpeg-xl transition with libavif transition.

It would be great if you have any suggestion, or even better, some good patches
on it.

Thanks,
Boyuan Yang


[1] https://buildd.debian.org/status/package.php?p=jpeg-xl