[gentoo-dev] Re: [RFC] Policy for migrating library consumers to subslots

[Martin Vaeth]

Matt Turner <mattst88@g.o> wrote:
>
>> || ( >=dev-lang/perl-5.14 virtual/perl-Term-ANSIColor )
>> and possibly change this if perl-5.20 does no longer contain
>> perl-Term-ANSIColor.
>
> Isn't that exactly what the virtual should do?

One can discuss what it *should* do, but it is certainly not
what happens, because the virtual exists in different versions:

If you only depend on virtual/perl-Term-ANSIColor,
it would currently install perl-core/Term-ANSIColor-4.20
*in addition* to the one provided by perl-5.14/5.16
(which is Term-ANSIColor-4.02 or -3.0.0, respectively).

Note that it would be stupid to depend on e.g.
=virtual/perl-Term-ANSIColor-4.02
for several reason:

1. The virtual does not even exist :)
2. It would collide with ebuilds depending on other versions.
3. This version is only reasonable if perl-5.16 is the
perl version which the user has installed.