[Evolution] Bug#623216: Bug#623216: evolution-data-server: EDS libs < 2.32 not compatible with EDS >= 2.32

[Patrick Ohly]

On Mo, 2011-04-18 at 17:50 +0200, Yves-Alexis Perez wrote:
> On lun., 2011-04-18 at 17:46 +0200, Patrick Ohly wrote:
> > How is that going to help a user who has Evolution and SyncEvolution
> > installed on Squeeze and then does a partial update of just Evolution
> > with "aptitude install -t testing evolution"?
> > 
> > If I'm not completely mistaken, aptitude will complete leave
> > SyncEvolution alone and installed in the Squeeze version together with
> > the old libecal/ebook, thus leading to a broken system.
> 
> It'll prevent upgrading the lib to 2.32 if syncevolution isn't updated
> together.

Why? That doesn't follow for me.

Here's the situation before the update (focusing on libecal):
      * installed from Squeeze:
              * syncevolution 1.0+ds1~beta2a-2, depends (>= 2.30.3) on
              * libecal1.2-7 
      * Testing has:
              * syncevolution 1.1~foo-bar, depends (>= 2.30.3 <= 2.32)
                on
              * libecal1.2-8 2.32.2-4
              * Evolution 2.32.2-2, same dependency

There's nothing that prevents installing Evolution 3.32 + libecal1.2-8
from Testing while keeping libecal1.2-7 2.30.3 and syncevolution 1.0
+ds1~beta2a-2 installed.

Basically the apps (SyncEvolution or Evolution) can't and shouldn't know
whether libecal1.2-7 and libecal1.2-8 are installable in parallel. Same
for a future libecal1.2-9. That will only be known when that future
version is ready and gets packaged, at which point a "conflicts with"
should be added to the new package based on that future knowledge.

> The real fix in fact would be to add that dependency to the shlibs of
> whatever lib syncevolution has issues with (which I still don't know
> right now).

libecal and libebook are both affected.


-- 
Bye, Patrick Ohly
--  
Patrick.Ohly at gmx.de
http://www.estamos.de/