On Thu, Aug 30, 2001 at 12:46:32PM +0100, Andrew Suffield wrote: > On Wed, Aug 29, 2001 at 08:44:23AM +0200, [EMAIL PROTECTED] wrote: > > I'm packaging Bugzilla but at now I don't know how to > > make downgrade possible. > > Why are you even trying? Downgrading is not officially supported in > Debian, there is no reason to allow individual packages to be > downgraded if doing so would be non-trivial.
Well I'm pleased to read this. But I have to make downgrade fialed. > > > In this case I have a solution, that is, regenerate random password > > for all user. But I think this is only the visible part of the iceberg, > > and indeed, that breaks other where. > > Gods no, that should be done manually by the admit. Randomized > passwords should be recorded someplace so that the user can be > informed, but this cannot be done safely by a maintainer script. The > only safe thing to do in this case is to disable use of the users, but > that's still unacceptable. In this case of old version of bugzilla a user can ask to have his password send by mail so this would be OK. > > The mainstream is very active, so for upgrade they maintain a script > > to update database structure. As I call this script in postings > > upgrade work well. Unfortunately this script isn't done for downgrade. > > > > It would be very boring to closely fallow upstream change and make > > prerm trying to regenerate old database structure, at least on > > CVS snapshot. > > And highly likely to trash the database. So I foggot this. > > > So how to deal with this? > > In pram, check to see if an attempt is being made to downgrade to an > old version which used the old format. If it is, scream like a banshee > then exit 1, with a note to the effect that a downgrade requires the > package be --purged, reinstalled, and then a pre-upgrade version of > the data files restored from backup media. So I have to give a chance to the user to make a backup. That's not trivial. Unfortunately, even if 'old-prerm upgrade new-version' failed, 'new-prerm failed-upgrade old-version' will success and this will make beilive that downgrade is a success. (Remember, old is newer than new since it's a downgrade) > Also warn during the upgrade of the package. Do you mean by deacon ? Rémi Perrot
