Re: [gentoo-dev] Dependencies that're available at pkg_*inst

[Doug Goldstein]

Ciaran McCreesh wrote:
> On Sat, 19 Apr 2008 18:38:06 +0200
> "Marijn Schouten (hkBst)" <hkBst@g.o> wrote:
>
>> Every package dependency in DEPEND is installed and usable before
>> src_unpack starts, right? So is the question here whether or not they
>> can be uninstalled right before pkg_{pre,post}inst starts?
>>
>
> If we're using binaries, DEPEND is usually ignored.
>
But if we're using binaries then src_unpack isn't called so this is a 
moot statement and the O.P.'s statement is correct.

>
>> I don't know what the general use of pkg_preinst is, but in
>> pkg_postinst the package itself should be runnable, so its RDEPENDS
>> should be installed and usable at this point. So perhaps we should
>> define that "usable" means "each of its RDEPENDs is installed and has
>> had its pkg_postinst function run". The recursion of that definition
>> then comes from the requirement that RDEPENDs should be usable before
>> pkg_postinst starts running.
>>
>
> No good. That prevents RDEPEND <-> RDEPEND cycles from being solved,
> and the package manager has to be able to solve that.
>

Can you give a concrete example? Not a foo and bar or a and b example. 
But a real package example. Because there are a few packages in the tree 
which call themselves in pkg_postinst

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