Re: [gentoo-dev] Optional Package Dependencies for netscape-flash -> libflashsupport

[Olivier Crête]

On Fri, 2007-11-05 at 13:52 -0600, Jim Ramsay wrote:
> Thomas Rösner wrote:
> > Jim Ramsay wrote:
> > > [snip]
> > > Have netscape-flash with IUSE="vanilla" (by default it is off),
> > > which when enabled will not pull in libflashsupport.
> > >
> >
> > I don't quite see why this is necessary? Or why you do have this
> > discussion?
>
> I started this discussion to find out the best way to add
> libflashsupport to netscape-flash for users who want the extra features
> that it offers.
>
> > > This meets the following goals:
> > >
> > > 1) It makes it easy for "regular" users to get netscape-flash with
> > > any additions required by any global USE flags in exactly one step:
> > >  - emerge netscape-flash
> > >
> >
> > So, in netscape-flash:
> > RDEPEND="
> >     ssl? ( foo/libflashsupport )
> >     pulseaudio? ( foo/libflashsupport )
> >     esd? ( foo/libflashsupport )
> >     oss? ( foo/libflashsupport )
> > "
> > and IUSE="ssl pulseaudio esd oss gnutls" in libflashsupport (which, as
> > already said, has it's own ebuild)?
>
> Yes, I considered this, it is option (2) in the original post in this
> thread. However, I do not believe this is the best solution.  Consider
> the case where:
>  - A user has 'ssl' disabled globally
>  - A user sees that netscape-flash now has 'ssl' support, so he/she
> enables 'ssl' just for the netscape-flash ebuild.
>  - The ebuild would then install libflashsupport, but do so without
> actually adding ssl support, which would be quite frustrating to the
> user, and probably generate unnedded bug traffic.
>
> It would be much more clear to only use the ssl USE flag when it
> actually affects ssl support.

The solution to this is use-based deps.. The short term workaround is to
use built_with_use.

-- 
Olivier Crête
tester@g.o
Gentoo Developer