On Nov 23, 2014 6:14 AM, "Jonas Smedegaard" <d...@jones.dk> wrote: > > Quoting Reinhard Tartler (2014-11-23 02:57:33) > > On Thu, Nov 20, 2014 at 9:02 PM, Jonas Smedegaard <d...@jones.dk> wrote: > >> Quoting Reinhard Tartler (2014-11-20 21:45:56) > >>> On Nov 20, 2014 3:01 PM, "Jonas Smedegaard" <[1]d...@jones.dk> wrote: > >>>> Quoting Andreas Cadhalpun (2014-11-20 17:09:49) > >>>>> On 19.11.2014 13:09, Jonas Smedegaard wrote: > >>>>>> Possibly we can simplify even further: > >>>>>> > >>>>>> * Have package libavcodec-extra-NN provide virtual > >>>>>> libavcodec-extra (i.e. non-versioned name of itself) > >>>>>> * Let GPLv2 packages conflict against libavcodec-extra (i.e. not > >>>>>> replace but complement existing suggests/recommends/depends). > >>>>>> > >>>>>> How does that sound? > >>>>> > >>>>> This sounds good, except that the virtual package needs another > >>>>> name, because libavcodec-extra is actually a real package [1]. > >>>> > >>>> I don't see a problem in conflicting both with virtual provisions > >>>> of the package and the real package - as the latter seems to me to > >>>> provide nothing beyond pulling in latest of those same virtual > >>>> provisions. > >>> > >>> I'm pretty sure that this approach makes it impossible to have a > >>> versioned dependency on libavcodec-extra. Not sure if there is an > >>> actual need for this, though. > >> > >> Now you get me curious: How would providing a virtual package make it > >> any more difficult to depend versioned on a package? > > > > > > AFAIUI, if you have libavcodec-extra both virtual and real, then > > application packages can no longer declare: > > > > Depends: libavcodec-extra (>> 6:11) > > > > And reliably expect that the version constraint is obeyed. Or am I > > missing something? > > Until recently, declaring a versioned dependency against a package both > real and virtual meant that only the real package was considered, by the > logic that only real packages can satisfy a version constraint.
Oh, if that is the case, then your idea of adding the provides, and having maintainers of gplv2 only packages conflict against libavcodec-extra sounds very appealing to me, because only the special cases need work. Let's do that then Best Reinhard
