Proposed Migration - Reference Edition

[Steve Langasek]

On Thu, Dec 12, 2019 at 11:56:48AM -0300, Andreas Hasenack wrote:
> On Wed, Dec 11, 2019 at 9:22 PM Bryce Harrington
> <bryce.harrington at canonical.com> wrote:
> > #######################
> > ### bind9 (Andreas) ###
> > #######################
> >
> >     bind9 blocking netbase (5.6 to 5.8) for 5 days
> >         Regressions
> >             bind9/1:9.11.5.P4+dfsg-5.1ubuntu4: i386 (log, history)
> >
> > * bind9 (i386)
> >   - Looks like maybe something to do with netbase/5.8?
> >   - Andreas writes, "Blocking migration: I spotted bind9/i386 blocking
> >     the migration of netbase, so I'll take a look at that tomorrow. It
> >     was also in Steve's last email about the i386 status in focal."
> >
> > * See https://lists.ubuntu.com/archives/ubuntu-devel/2019-December/040859.html
> 
> Since then, the test was hinted and is a known failure now, not
> blocking the migration anymore. I took a look in any case, and
> launching a focal/i386 container and running that test works just
> fine, for now (since lxc still has focal/i386 images). But I spotted
> this in the autopkgtest log:

> autopkgtest [19:05:04]: testbed running kernel: Linux 5.3.0-24-generic
> #26-Ubuntu SMP Thu Nov 14 01:33:18 UTC 2019
> autopkgtest [19:05:04]: testbed dpkg architecture: amd64
> autopkgtest [19:05:04]: testbed target architecture: i386

> I'll re-read Steve's series of emails about how these tests are run.
> The actual failure was a dependency problem involving amd64 packages,
> and this is supposed to be an i386 test run, so maybe something is
> wrong in how the environment is setup to run these i386 tests without
> a base i386 image.

Many tests need changes to annotate their dependencies as to whether they
need a version of the package that matches the target arch or not.  In the
case of bind9, it looks like the problematic dependency chain is bind9 ->
bind9utils -> python3.

python3 is Multi-Arch: allowed, which means that packages which only use it
as an interpreter can /in theory/ depend on python3:any instead of on
python3 to declare that they're fine with the interpreter being from a
different arch.  But while dh-python correctly gives bind9utils a dependency
on python3:any, there is also a hard-coded dependency in debian/control on
'python3', which forces the selection of the i386 python3, which is not
cross-installable.

So please fix bind9utils to drop this hard-coded dependency on python3.

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                   https://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org
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