Hi there, [ dropping -devel ] On Fri, Jun 08, 2012 at 07:09:56AM +0200, Guillem Jover wrote: > Hi! > […] > Hmmm, so I had prepared a patch which basically checks if the package > has its dependencies fulfilled before calling the postinst script with > "triggered", and otherwise defers the trigger processing for later (but > only as long as it is not running from inside the deferred trigproc run). > > This fixes this specific case just fine (t-triggers-depends test > case in dpkg/pkg-tests.git), but this in turn creates problems with > packages with pending triggers depending on packages awaiting them, > as it forces breaking trigger cycles, which is not really a nice > upgrade path. > > An immediate example of this is man-db and dpkg itself. While this > specific case could be fixed by removing the old versioned dpkg > dependency from man-db, I'm assuming other such cases might exist > on the archive, and I'm not prepared to add any such fix to dpkg > w/o further analysis. Is it possible to detect that there is a cycle happening and revert to the 'old' behaviour of just not considering satisfaction of depends? > In any case, this and most other similar cases would just disappear > by switching those triggers to the noawait variants, but that's not > supported by dpkg in stable so that would need to wait until after > wheezy. > > OTOH I'm quite tired right now, and it's probable I'm missing > something obvious... but in view of the above possibly producing mass > breakage I've pulled out that patch from the dpkg 1.16.4 release which > I wanted to push yesterday already. OK. For mono-tools then, do we get that libgtk2.0-cil will be at least unpacked when the trigger is processed? i.e. could we have the postinst perform the GAC registration itself? Hmm, but that at least requires mono-gac (on which libgtk2.0-cil transitively depends) to be unpacked and for its postinst to be run too. Can we also assume that it will be unpacked by dpkg's standard ordering? Cheers, -- Iain Lane [ iain@orangesquash.org.uk ] Debian Developer [ laney@debian.org ] Ubuntu Developer [ laney@ubuntu.com ] PhD student [ ial@cs.nott.ac.uk ]
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