Re: [gentoo-dev] RDEPEND definition in docs differ from official PMS specs

[Petteri Räty]

Maciej Mrozowski wrote:
> On Sunday 18 of January 2009 16:21:57 Ciaran McCreesh wrote:
>
>> And yes, I'd really like to see this killed for EAPI 3. Ideally we'd go
>> with a single DEPENDENCIES variable with labels of some kind,
>> something like:
>>
>>     DEPENDENCIES="
>>         build:
>>             foo/bar
>>         build+run:
>>             foo/baz
>>         post:
>>             foo/plugin"
>>
>> which would make it much easier to start specifying dependencies for
>> use of ROOT properly in the future -- it'd just be new labels, not
>> zillions of new variables.
>
> What's the benefit of changing syntax so dramatically? (apart from the sake of
> changing it to someone's liking) and what's so wrong with zillion of separate
> dependency variables? Are they too easy to read, implement and understand?
> As everyone knows, to avoid copy&paste one can easily use such scheme:
>

I don't think I have heard any devs opposing labels yet. Labels enable a
lot of good things when you start to use them heavily. See Exherbo docs
for ideas:

http://www.exherbo.org/exheres-0.html#dependencies

> COMMONDEPEND="
>      somedep
>      someotherdep
>      someuse? ( conddep )
> "
> DEPEND="${COMMONDEPEND}
>      somebuilddeponly
> "
> RDEPEND="${COMMONDEPEND}
>
> "
>
> Similar simple bash play can be used for other purposes as well.

Yeah you can usually make things more complex than they need to be if
you want.

DEPENDENCIES="
   build:
     somebuilddeponly
   run:
     someruntimedeponly
   build+run:
     somedep
     someotherdep
     someuse? ( conddep )"

Regards,
Petteri