Bug#596097: apt: Please support setting a pin of 100 from within an archive (NotAutomaticButUpdates)

[Carsten Hey <carsten@debian.org>]

* Julian Andres Klode [2010-09-08 18:58 +0200]:
> My opinion: It may break some applications making use of NotAutomatic
> flags if you suddenly add a third type of sources (0, NotAutomatic,
> NotAutomaticButUpdates). But the breakage is probably not that hard.

I don't see how this could break applications.  If they see unknown
flags they should ignore them and work like if they wouldn't be there.

> I'd like to have per-source default pin priorities instead of yet
> another NotAutomatic flag, but that's too complicated and breaks the
> ABI.

The disadvantage of a per-source default pin priority (in contrast to
NotAutomaticButUpdates) is the "pin war potential" (see other mails in
this bug report).  I had the same doubts as David Kalnischkies has about
this already years ago, but did not mention it in the bug since there
did not seem to be any interest to fix this bug and thus no need for
such implementation details.

Regards
Carsten