Le samedi 26 juin 2010 à 22:30 +0200, Marc Haber a écrit : > On Sat, 26 Jun 2010 15:20:46 +0200, Josselin Mouette <j...@debian.org> > wrote: > >Furthermore, I’d be interested to know how to fix such a “shortcoming” > >in our software. If both A and B depend on each other, A.postinst must > >be executed before B.postinst, and vice versa. > > That's only one kind of circular dependency, and the one making the > problems. When you look at the circular dependencies, for example > within the exim4 or the aide packages, you see that the dependencies > defined in there aren't _that_ strict.
You could say it’s not problematic all the time - that’s the case of fcron/exim4, which is only a problem for users installing fcron. But it is a real one: if fcron requires exim to be running to work correctly, while exim requires fcron to be running to work correctly, you’re doomed. In this case, there’s a solution: exim needs (f)cron installed on the system, but it doesn’t need it to be configured and running. But there’s simply no way for dpkg to know that, since the semantics of dependencies don’t express that order. For aide, I just don’t see the point: it’s the simplest, straight example of an unjustified 2-packages circular dependency. -- .''`. Josselin Mouette : :' : `. `' “If you behave this way because you are blackmailed by someone, `- […] I will see what I can do for you.” -- Jörg Schilling
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