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List:       gentoo-dev
Subject:    Re: [gentoo-dev] PKG-INFO (Was: PMS EAPI 3 more or less ready)
From:       Ciaran McCreesh <ciaran.mccreesh () googlemail ! com>
Date:       2009-04-23 12:42:05
Message-ID: 20090423134205.31e86a1f () snowcone
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On Thu, 23 Apr 2009 01:29:11 -0700
Brian Harring <ferringb@gmail.com> wrote:
> On Wed, Apr 22, 2009 at 02:57:34PM +0100, Ciaran McCreesh wrote:
> > On Wed, 22 Apr 2009 16:56:08 +0300
> > Petteri Räty <betelgeuse@gentoo.org> wrote:
> > > Ok. So people should then be using has_version in pkg_info if they
> > > want to detect if it's installed or not?
> > 
> > If they absolutely totally need to detect that, then yes.
> 
> Presuming I read that correctly, invoking has_version w/in pkg x to 
> see if pkg x is installed seems like redundant code (and slightly 
> circuitious from a PM standpoint)- why not just export a bool into
> the env for pkg_info indicating if it is installed or not?

Because you might want to check that foo is installed from within foo,
or you might want to check that foo-2 is installed from within foo-2,
or you might want to check something subtly different -- and that's
before we start thinking about slots. It's not really a bool thing, so
has_version is the simplest way for people who need to detect a
particular thing to detect it.

-- 
Ciaran McCreesh

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