Re: [PATCH v7] dpkg: Restore support for replacing pre-installed packages in sbuild-chroot

[Anton Mikanovich <amikan@ilbers.de>]

10/02/2025 14:02, Jan Kiszka wrote:
> Invalid partial rebuild scenario: If you are enforcing a rebuild of the
> sbuild-chroot, you also need to wipe all ISAR_REBUILD_ESSENTIAL_PKGS
> first. Can you explain what you actually did to trigger this?
>
> If you sit down for a moment, it should become clear what makes
> rebuilding complex when essential packages are replaced: They can become
> part of their own sbuild-chroot.
>
> Simply excluding isar-apt from the sbuild-chroots of essential packages
> could help - but only as long as we are not rebuilding a dependency
> chain of multiple packages. Granted, the latter is even less likely to
> happen than already having to rebuild essential packages. We are going
> down the rabbit hole of distro boot strapping here...
>
> Jan
>
Ok, it looks like I've found the case that was fixed: If package A (already
installed in sbuild-chroot) gets rebuilt with an updated version, package B
depends on any version of A (not just =new version like in my case), when B is
built, apt would keep the old version of A and not pull the newly built one.

The issues were triggered downstream after updating Isar version. I've changed
a bbclass and bitbake has failed. As a user, I'd like to be able to perform
rebuilds without wiping packages.

I'll work on a testcase and a fix for this issue.

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