Ciaran McCreesh wrote:

> On Sat, 28 Jun 2008 23:41:17 +0200
> Tiziano Müller <[EMAIL PROTECTED]> wrote:
>> > := only makes sense when something is both a DEPEND and an RDEPEND.
>> > Actual behaviour, for Paludis, is that it rewrites := deps to :=blah
>> > when writing to VDB any time it can, and leaves anything it can't
>> > as := deps. Verifying sanity of := use is left to developers and
>> > the QA tool.
>>
>> ... and the spec.
> 
> The spec's well defined. It just tells you how := works, not how to use
> it in a sensible manner. Pretty much the same as for everything else.
Sorry, but I disagree.

> 
>> > The only sensible thing you can do with multiple matches on := slots
>> > (and ||=, if that route is taken) is to take the slot of the best
>> > matching installed version, and require that ebuilds do that too. In
>> > real world cases, this works just fine.
>> > 
>> so, ebuilds should use best_version instead of has_version for
>> example. That's what I meant and what I miss in the kdebuild-1
>> spec :-)
> 
> Generally, it "just works", because packages are usually fairly good at
> picking up the best installed version themselves anyway. But yes, if
> you have to pass a version manually to a package, best_version is the
> way to do it.

And what about a function to tell the PM explicitly which slot of a
dependency has been used (as an alternative)? Or should that decision
always be left to the PM? (that's something I'd expect to be in the PMS)


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