From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Specifying and build output separately?
Date: Mon, 17 Oct 2016 10:55:48 +0200
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References: <118ccdd8-3b7f-2b35-5f5e-69375c1a4565@crazy-compilers.com>
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In-Reply-To: <118ccdd8-3b7f-2b35-5f5e-69375c1a4565@crazy-compilers.com>
	(Hartmut Goebel's message of "Sat, 15 Oct 2016 10:06:34 +0200")
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To: Hartmut Goebel <h.goebel@crazy-compilers.com>
Cc: Guix-devel <guix-devel@gnu.org>

Hello,

Hartmut Goebel <h.goebel@crazy-compilers.com> skribis:

> we have several cyclic dependencies due to e.g. packages depending on
> each other only for building the documentation. Examples are numpy and
> matpltlib.
>
> So I wonder it it would be possible to to something like this:
>
> (define-public numpy:doc
>   (inherit numpy)
>   (name "numpy:doc")
>   (outputs "doc")
>   (inputs =E2=80=A6 matplotlib =E2=80=A6)
>   (=E2=80=A6 modify-phases =E2=80=A6))

Making the documentation a separate package, instead of a separate
output, is of course doable and it could help address the circular
reference issue.

Currently the approach used for numpy is a different one: there=E2=80=99s a
=E2=80=9Cbootstrap=E2=80=9D package lacking documentation that is used as i=
nput to the
final package, which has an extra =E2=80=9Cdoc=E2=80=9D output.

I prefer this approach over what you propose because it=E2=80=99s more
consistent with what we usually do, which is to have doc in a =E2=80=9Cdoc=
=E2=80=9D
output rather than in a separate package.

Thanks,
Ludo=E2=80=99.