Re: [gentoo-dev] Re: useflag policies

[Ciaran McCreesh <ciaran.mccreesh@googlemail.com>]

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On Wed, 12 Aug 2015 19:43:55 +0200
Ulrich Mueller <ulm@gentoo.org> wrote:
> >>>>> On Wed, 12 Aug 2015, Ulrich Mueller wrote:
> > Hm, how about adding a new PM command like "required_use foo -bar"?
> > It would be used exclusively in pkg_pretend, and tell the PM to
> > suggest the necessary package.use changes to the user (or even
> > update them automatically with the appropriate --autounmask-*
> > option).
> 
> To clarify, I'm thinking about something like this:
> 
> pkg_pretend() {
>     if use qt4; then
>         required_use -qt5
>     else
>         required_use qt5
>     fi
> }
> 
> The advantage would be that any number of elog messages could be added
> which would further explain things to the user.

And how would the PM understand that -qt5 is conditional upon qt4? Such
knowledge is required if it's supposed to auto-resolve stuff...

-- 
Ciaran McCreesh

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