The append-revisions-only can of worms

[James Westby]

On Sat, 16 Jul 2011 11:17:33 +0100, Max Bowsher <_ at maxb.eu> wrote:
> I've tracked down a cause of some of the AppendRevisionsOnlyViolation
> failures.
> 
> When a package is uploaded to Debian and synced to Ubuntu, there's a
> race condition between Launchpad's Debian metadata importer and the UDD
> package importer.
> 
> If the UDD package importer tries to import the package in the window
> when Launchpad knows of the Ubuntu publication but not of the Debian
> publication, then the new package version gets imported first into the
> Ubuntu branch.
> 
> Later, when the Debian publication becomes visible, Launchpad sees that
> this particular (package,version) has already been imported.... and
> tries to pull the Ubuntu branch into the Debian sid branch.
> 
> And of course, if the package has *ever* had an Ubuntu specific upload,
> that's an AppendRevisionsOnlyViolation.
> 
> So we've actually found a bug here :-(

Yeah, I think the logic should be to do a merge taking all the content
from Ubuntu, with the parents being (debian, ubuntu)?

Thanks,

James