Handle soname bumps in package names

Unsubscribing ~ubuntu-sponsors, as the merge request is only actionable by someone in the ~ppa-purge team.

This bug was fixed in the package ppa-purge - 0.2.8+bzr63

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ppa-purge (0.2.8+bzr63) xenial; urgency=low

  * Add bash autocompletion and tweak options slightly. (LP: #1064205)
  * Specify removal of packages that don't exist in Ubuntu (LP: #706774)
  * Add some logic to handle packages that have had a soname bump, packages with
    manual renames will still break, however these should be pretty rare. (LP: #1392954)
  * Add Vcs-fields, Thanks Dominique Lasserre

 -- Tim Lunn <email address hidden> Fri, 30 Nov 2012 08:25:57 +1100

In 16.04 purging gnome3-staging seems to work without such guesswork. Maybe the fault was in the archives?

Note that in my testing, I still marked reverts that were not available anymore for removal.

It seems this fix was newer released. It was only commited in https://git.launchpad.net/ppa-purge/commit/?id=eb366bba8ae2613f591271eb8a33fdacf5f2ad97

I did my fork from a later commit (https://git.launchpad.net/~jarnos/ppa-purge/) and later modified the soname bumping mechanism and made it optional there.

I still not quite understand the need for such special soname handling. Was gnome3-staging somehow broken so that downgrading a gnome package did not install depending downgraded soname library or what? Do we still need special soname handling?

That was from the days when gnome3-staging shipped GNOME version+1. Apt
didnt have any mechanism to roll back soname bumps on the core system
libraries (and I doubt it even would today, as that is not a use case
that exists in Debian).

That said its been a long time since anything was published to
gnome3-staging or that I have even had to use ppa-purge.

Tim

On 7/8/22 14:24, Jarno Suni wrote:
> It seems this fix was newer released. It was only commited in
> https://git.launchpad.net/ppa-
> purge/commit/?id=eb366bba8ae2613f591271eb8a33fdacf5f2ad97
>
> I did my fork from a later commit
> (https://git.launchpad.net/~jarnos/ppa-purge/) and later modified the
> soname bumping mechanism and made it optional there.
>
> I still not quite understand the need for such special soname handling.
> Was gnome3-staging somehow broken so that downgrading a gnome package
> did not install depending downgraded soname library or what? Do we still
> need special soname handling?
>

I tried some ffmpeg PPA on Bionic, and upgrading installed a lot of soname bumbs, but the old ones were not removed due to some other dependants, so I could not test, if there would have been an issue with newer apt, yet.