Re: Nested rich-dependencies in rpm

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On Wed, Apr 12, 2017 at 02:56:24PM +0200, Christian Dersch wrote:
> >On Wed, Apr 12, 2017 at 11:08:46AM +0200, Björn 'besser82' Esser wrote:
> >>I hope someone can help me with the following question:
> >>Does recent Fedora's rpm support nested rich-dependencies like:
> >>   Supplements: (pkg_a and pkg_b and pkg_c and (pkg_d or pkg_e))
> >>Is there any way to express a dependency like that?
> >Can you give an example of when this might be a good idea? It seems
> >easy to go overboard with this without clear benefit.
> >
> The example is dnfdragora, a nice new GUI for DNF. It uses libyui
> abstraction to provide native GUI/TUI for GTK+3, Qt and ncurses. The
> rich-dependencies ensure that the right libyui bindings get
> installed. So an Xfce user would get libyui-gtk while an LXQt user
> would get libyui-qt.

So, in concrete terms:

Supplements: dnf and ____ and ____ and (libyui-gtk or libyui-qt)

?

What are the blanks? And the meaning is: this shouldn't show up as
a suggested addition unless those blanks _and_ a libyui of some sort
is already installed (or will be installed)?

Going back to the benefits question: why is this better than including
dnfdragora in the appropriate groups in comps?


-- 
Matthew Miller
<mattdm@xxxxxxxxxxxxxxxxx>
Fedora Project Leader
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