Re: [gentoo-dev] don't rely on dynamic deps

[Michał Górny]

Dnia 2014-07-27, o godz. 17:08:27
Rich Freeman <rich0@g.o> napisał(a):

> On Sun, Jul 27, 2014 at 4:24 PM, Michał Górny <mgorny@g.o> wrote:
> > Dnia 2014-07-27, o godz. 10:42:19
> >
> > Consider the following:
> >
> > 1. A depends on B, both are installed,
> >
> > 2. dependency on B is removed, emerge --depclean uninstalls B thanks
> > to dynamic-deps,
> >
> > 3. B is treecleaned (nothing depends on it),
> >
> > 4. old version of A is removed (user doesn't update it yet), therefore
> > dependency on B is restored from vdb.
> >
> > So, now user has package A installed which has unsatisfied dependency
> > on non-available package.
>
> I'd think that portage should update vdb as soon as it detects the
> dependency change.  Then B would no longer depend on A in vdb.  It
> shouldn't hold onto outdated information.

You just introduced the opposite breakage -- when a dependency on C was
added, it ends up in vdb before C is installed. Now if C and current
version of A are removed before C gets installed, you end up having
broken dependency in vdb...

Plus, 'as soon' means you're making --pretend actually write something.
That's bad.

-- 
Best regards,
Michał Górny