Re: [gentoo-dev] USE dependencies

["Nirbheek Chauhan" <nirbheek.chauhan@gmail.com>]

On Sun, Jan 4, 2009 at 9:16 PM, Tomáš Chvátal <scarabeus@gentoo.org> wrote:
> This is all nice but i had one issue which was like this:
> i have package with use foo and package2 with use bar
> and package with foo depend on package2 with bar.
>
> so this is not eapi2 incely handleable, what i would like to do is using
> arrows or something like that
>
> package2[foo?->bar] or package2[foo->bar?]
>
> now i handle it that way both packages have same useflag.

How about this:

New syntax            Expanded syntax
                Extension of
--------------------------------------------------------------------------------------------------------
pkg[foo?bar]           foo? ( cat/pkg[bar] ) !foo? ( cat/pkg )
         cat/pkg[foo?]
pkg[!foo?bar]          foo? ( cat/pkg ) !foo? ( cat/pkg[bar] )
         cat/pkg[foo?]
pkg[foo=bar]           foo? ( cat/pkg[bar] ) !foo? ( cat/pkg[-bar] )
      cat/pkg[foo=]
pkg[!foo=bar]          foo? ( cat/pkg[-bar] ) !foo? ( cat/pkg[bar] )
      cat/pkg[!foo=]

IMO, this is simple enough to understand, and use :)

-- 
~Nirbheek Chauhan