From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Python 3 binaries
Date: Sun, 01 Sep 2013 16:03:47 +0200
Message-ID: <87d2osoczg.fsf@gnu.org>
References: <20130831153018.GA5442@debian> <5222282D.7000801@gmail.com>
	<20130901092817.GA19604@debian>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Return-path: <guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:44091)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <ludo@gnu.org>) id 1VG8Kw-000346-4h
	for guix-devel@gnu.org; Sun, 01 Sep 2013 10:09:12 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <ludo@gnu.org>) id 1VG8Kp-0002tZ-Vu
	for guix-devel@gnu.org; Sun, 01 Sep 2013 10:09:06 -0400
Received: from hera.aquilenet.fr ([141.255.128.1]:58866)
	by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <ludo@gnu.org>)
	id 1VG8Kp-0002tR-Pf
	for guix-devel@gnu.org; Sun, 01 Sep 2013 10:08:59 -0400
In-Reply-To: <20130901092817.GA19604@debian> (Andreas Enge's message of "Sun,
	1 Sep 2013 11:28:17 +0200")
List-Id: <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: Andreas Enge <andreas@enge.fr>
Cc: guix-devel@gnu.org

Andreas Enge <andreas@enge.fr> skribis:

> Very well. If we do not wish to make the symlink python->python3,
> then we will need special code in patch-shebangs, so that things like
> "#!/usr/bin/python" may get rewritten to
> "#!/nix/store/...python-3.3.2/bin/python3" if no binary named "python"
> is found.

Ah, so packages that work with Python 3 expect a =E2=80=98python=E2=80=99 (=
and not
=E2=80=98python3=E2=80=99) executable?

Then that=E2=80=99s a different story (I thought =E2=80=98python3=E2=80=99 =
was the official name
for the binary.)

I=E2=80=99d rather not have specific things like that in =E2=80=98patch-she=
bangs=E2=80=99.  So,
what we could do is:

  =E2=80=A2 Leave =E2=80=98python-3=E2=80=99 as is, without the symlink.

  =E2=80=A2 Add a =E2=80=98python-3-wrapper=E2=80=99 package that just cont=
ains =E2=80=98bin/python=E2=80=99
    pointing to =E2=80=98=E2=80=A6/bin/python3=E2=80=99 (using =E2=80=98tri=
vial-build-system=E2=80=99.)

  =E2=80=A2 When building Python 3 packages, we=E2=80=99d use the wrapper, =
not the real
    one; however, users would install the real one in their environment.

WDYT?

Ludo=E2=80=99.