Re: [PATCH 1/1] apt: allow package downgrades in sbuild chroots

["'MOESSBAUER, Felix' via isar-users" <isar-users@googlegroups.com>]

On Tue, 2025-05-13 at 13:40 +0200, Jan Kiszka wrote:
> On 13.05.25 09:02, 'Felix Moessbauer' via isar-users wrote:
> > The sbuild chroots carry many packages needed for the build
> > environment.
> > This sometimes requires packages from bootstrapping to be
> > downgraded so
> > that the dependencies can be resolved.
> > 
> > An example is the liblzma5 which currently (1st of May 2025) needs
> > to be
> > downgraded on Debian bookworm.
> > 
> > Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
> > ---
> >  meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc
> > b/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc
> > index 6478d3a6..05424f54 100644
> > --- a/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc
> > +++ b/meta/recipes-devtools/sbuild-chroot/sbuild-chroot.inc
> > @@ -61,6 +61,9 @@ ROOTFS_POSTPROCESS_COMMAND:remove =
> > "rootfs_cleanup_isar_apt"
> >  # Do not cleanup base-apt
> >  ROOTFS_POSTPROCESS_COMMAND:remove = "rootfs_cleanup_base_apt"
> >  
> > +# Allow downgrades of packages from bootstrap
> > +ROOTFS_APT_ARGS += "--allow-downgrades"
> > +
> 
> We already have partial downgrade permission for isar-apt and even
> for
> the devshell. We should check if those are then still relevant.

I also thought about globally applying the downgrade permission to the
rootfs class, but I also was unsure about the side-effects.

Nontheless, I prefer to have this fix merged rather sooner than later,
as Debian bookworm builds ~ after 1st of may are broken. It looks like
some package in the sbuild chroot list depends on an older version of
liblzma5 which is already installed during bootstrap.

Felix

> 
> But we also need to check again about other, maybe less desirable
> side
> effects of this change...
> 
> Jan
> 
> >  DEPLOY_SCHROOT = "${@d.getVar('SCHROOT_' +
> > d.getVar('SBUILD_VARIANT').upper() +
> > '_DIR')}${SBUILD_SCHROOT_SUFFIX}"
> >  
> >  do_sbuildchroot_deploy[dirs] = "${DEPLOY_DIR}/schroot-
> > ${SBUILD_VARIANT}"
> 

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