Re: [PATCH 2/4] gnu: Add xcffib

[ludo@gnu.org (Ludovic Courtès)]

Federico Beffa <beffa@ieee.org> skribis:

> On Mon, Dec 15, 2014 at 11:16 PM, Ludovic Courtès <ludo@gnu.org> wrote:
>>> +    (propagated-inputs
>>> +     `(("python-cffi" ,python-cffi)))
>>
>> Please add a comment saying why this is propagated.
>
> The reason is that I want the package to inherit the propagated inputs
> from 'python-cffi' as the latter requires 'python-pycparser' at run
> time. If I don't make python-cffi a propagated-input, but a normal
> input, I need to copy the propagated-inputs from that package and
> (re-) make them propagated-inputs of python-xcffib as well.

Oh, I see.  But that’s basically because xcffib does “import cffi” or
something like that, right?

In that case I would just add a comment saying that, unless you really
think it’s obvious (it wasn’t to me, initially.)

> A similar reason applier to python-xcffib in python-cairocffi and to
> pygobject + python-cairocffi + gobject-introspection + pathon-pycairo
> in python-matplotlib.
>
> Is that OK?

Yes.  Thanks for explaining!

Ludo’.