[Pkg-gmagick-im-team] Bug#573972: pyxplot: Depends on obsolete libmagickcore2-extra

[Stuart Prescott]

Hi,

Following the soname bump of  libmagickcore, I now have #573972:

> pyxplot explicitly depends on libmagickcore2-extra, which no longer exists
> after the recent imagemagick upload to unstable; it's been replaced by
> libmagickcore3-extra.
>
> Please check and update your build-dependency.

This is a trivial thing for me to fix in the pyxplot packaging, but the fact 
that pyxplot requires a sourceful upload when something it only ever calls at 
the command line undergoes a soname bump probably points to something wrong 
here.

The only reason that pyxplot build-depends on libmagickcore2-extra is to get 
svg to png conversion functionality in imagemagick. Since pyxplot doesn't 
actually use any symbols itself from imagemagick at all (it just calls 
convert!), it shouldn't need to worry about transitions in helper utilities 
that it calls.

Is there already a better way for me to write a depends line that brings this 
functionality into convert? If not, should there be? I don't really want 
pyxplot (and however many other package out there) to require sourceful 
uploads every time you need a soname bump on imagemagick :( Would "Provides:  
libmagickcore-extra" be a reasonable solution so that packages can depend on 
that instead?

thanks in advance
Stuart
(who was tempted to clone this bug as a wishlist bug against  
libmagickcore3-extra but thought he'd ask first!)

-- 
Stuart Prescott                 www.nanoNANOnano.net
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