On Thu, Dec 10, 2015 at 7:52 AM, Michael Schroeder <m...@suse.de> wrote:
> On Thu, Dec 10, 2015 at 12:58:41PM +0100, Reindl Harald wrote:
> > Am 10.12.2015 um 12:53 schrieb Rex Dieter:
> > >Florian Weimer wrote:
> > >
> > >>When a %post scriptlet runs, is it guaranteed that the Requires:
> > >>dependencies have been unpacked? I understand that for cycle-breaking
> > >>purposes, it may not be true that the scriptlets for dependencies have
> > >>run. But are the files already there?
> > >
> > >I think the answer in general is no, you cannot be guaranteed that
> Requires:
> > >get installed before %post runs. That's one reason why Requires(post)
> > >exists
> >
> > sounds terrible
> >
> > what's with the "Require" of a "Requires(post)" to guarantee that
> > the "Requires(post)" *really* work sucessful? sounds fragile
>
> Relax, the difference between Requires and Requires(post) is rather
> small. It only makes a difference when breaking dependency cycles,
> and in that case there's no correct solution anyway.
>
> I.e. if package A has "Requires: B" and package B has
> "Requires(post): A", there's really no correct order.
>
> "First A then B" is incorrect because "A Requires B" may mean that
> B must by 100% installed (with postinstall scriptlets) for A to work,
> thus A may still not work in B's post script.
>
> Cheers,
> Michael.
>
> --
> Michael Schroeder m...@suse.de
> SUSE LINUX GmbH, GF Jeff Hawn, HRB 16746 AG Nuernberg
> main(_){while(_=~getchar())putchar(~_-1/(~(_|32)/13*2-11)*13);}
>
>
As I recall, I believe there was a way in RPM at some point to declare a
dependency that *must* be unpacked and installed prior to starting to do
anything with a package, but I don't remember what is was. Debian has the
equivalent as "Pre-Depends", which essentially guarantees that it is
unpacked prior to starting the installation (and running associated
scriptlets). I think it was called "PreReq", but I vaguely remember hearing
at one point that this doesn't actually work anymore?
--
真実はいつも一つ！/ Always, there's only one truth!
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