From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Enge <andreas@enge.fr>
Subject: Re: [PATCH] gnu: Add Scikit-learn.
Date: Sat, 28 Feb 2015 00:53:24 +0100
Message-ID: <20150227235324.GA16230@debian>
References: <20150223175238.GA10579@debian.eduroam.u-bordeaux.fr>
	<20150225225215.GA13330@debian> <20150225225740.GA13495@debian>
	<87bnkg61js.fsf@gnu.org> <20150226175900.GA3835@debian>
	<648692e7170fada41ebd45ebe0724e42@openmailbox.org>
	<20150226204309.GA12643@debian>
	<34d78aa36c64669e2a26bc58b3fa9de6@openmailbox.org>
	<20150227094151.GA4043@debian.eduroam.u-bordeaux.fr>
	<20150227224834.GA6114@debian>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:51062)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <andreas@enge.fr>) id 1YRUiv-00026F-Vh
	for guix-devel@gnu.org; Fri, 27 Feb 2015 18:53:38 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <andreas@enge.fr>) id 1YRUim-0006Ac-8W
	for guix-devel@gnu.org; Fri, 27 Feb 2015 18:53:37 -0500
Received: from mout.kundenserver.de ([212.227.126.131]:56239)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <andreas@enge.fr>) id 1YRUil-00067c-TK
	for guix-devel@gnu.org; Fri, 27 Feb 2015 18:53:28 -0500
Content-Disposition: inline
In-Reply-To: <20150227224834.GA6114@debian>
List-Id: "Development of GNU Guix and the GNU System distribution."
	<guix-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/guix-devel>,
	<mailto:guix-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/guix-devel>
List-Post: <mailto:guix-devel@gnu.org>
List-Help: <mailto:guix-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/guix-devel>,
	<mailto:guix-devel-request@gnu.org?subject=subscribe>
Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org
Sender: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org
To: Eric Bavier <ericbavier@openmailbox.org>
Cc: Guix-devel <guix-devel@gnu.org>

On Fri, Feb 27, 2015 at 11:48:34PM +0100, Andreas Enge wrote:
> Can we use in the 'source' field something like
> (if (string=? name "python-pycairo"
>               source-x
>               source-y))

We can, but it does not work. The second package inherits not the code to
construct the source, but the already constructed source itself.
One would need a more complicated construction, like putting into this field
a procedure that is evaluated at build time and not at package creation. But
this would modify the basics of our package format (and be rather complicated).

Andreas