Bug#823110: cups-filters: Versioned dependency on imagemagick makes using graphicsmagick harder

[Yuri D'Elia <wavexx@thregr.org>]

On Wed, May 31 2017, Samuel Thibault wrote:
> Hello,
>
> Versioned Provides are now supported, so graphicsmagick can just Provide
> the appropriate version of imagemagick.

I'll ask, but maybe they don't already because
graphicsmagick-imagemagick-compat does not guarantee 100% feature parity.

I'm using both, and certain filters/flags are just not available in
gm-compat, independently of the version.

> I don't see the point: we'd still want to recommend that package, so
> it's installed by default without making it a requirement. Just keeping
> it inside the cups-filter package gets the same dependencies in the end,
> while keeping things simpler.

My main point was that graphicsmagick/imagemagick is only used for those
filters. In theory, if you don't have liblouis* installed, imagemagick
is not going to be needed as well, which doesn't justify the hard
dependency.

You could put imagemagick as a recommend as well, but I always find it
confusing if one feature is dependent on *both* recommended packages to
be installed (sure, you can write about this in the README.Debian --
many packages do this, but it's not very friendly).