From mboxrd@z Thu Jan  1 00:00:00 1970
From: zimoun <zimon.toutoune@gmail.com>
Subject: Re: Build systems and implicit inputs
Date: Tue, 21 Jan 2020 13:24:33 +0100
Message-ID: <CAJ3okZ1SqtfyVuLYWYxD3sUv-0zkkrUObd5exQN7HQVuFELpsA@mail.gmail.com>
References: <8736ldq74z.fsf@netris.org> <20190719202906.lbanx5puk7t6q4cr@cf0>
 <87a7753boq.fsf@ambrevar.xyz> <87h813wah0.fsf@gnu.org>
 <87v9piut40.fsf@ambrevar.xyz>
 <CAJ3okZ3W85av6SPkY9yjH9XwLa+L_rysGFSCREYvhzcTXqQGCw@mail.gmail.com>
 <87o8v5ukgb.fsf@ambrevar.xyz>
 <CAJ3okZ1DLnh-aFoR3CiyiL8iF040s8iZ8B1iGotZ4dKx6ea4AA@mail.gmail.com>
 <87d0blhr9s.fsf@ambrevar.xyz>
 <CAJ3okZ2bU4FDrU6rUXtcYWv+GUbTM76rpDXZSYnbRuNvZqZvnA@mail.gmail.com>
 <20200116190644.uytvzvypuvdwh2iq@n0>
 <CAJ3okZ23X5Y10XN+gReoiyM+766BUMNW4BqCWQqHHpMr6piMRA@mail.gmail.com>
 <871rry10ow.fsf@ambrevar.xyz> <87o8uxdqnh.fsf_-_@gnu.org>
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-mx.org@gnu.org>
Received: from eggs.gnu.org ([2001:470:142:3::10]:50859)
 by lists.gnu.org with esmtp (Exim 4.90_1)
 (envelope-from <zimon.toutoune@gmail.com>) id 1itsaN-0004N2-S5
 for guix-devel@gnu.org; Tue, 21 Jan 2020 07:24:48 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <zimon.toutoune@gmail.com>) id 1itsaM-0001WU-SG
 for guix-devel@gnu.org; Tue, 21 Jan 2020 07:24:47 -0500
In-Reply-To: <87o8uxdqnh.fsf_-_@gnu.org>
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: <https://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-mx.org@gnu.org
Sender: "Guix-devel"
 <guix-devel-bounces+gcggd-guix-devel=m.gmane-mx.org@gnu.org>
To: =?UTF-8?Q?Ludovic_Court=C3=A8s?= <ludo@gnu.org>
Cc: Guix Devel <guix-devel@gnu.org>

Hi Ludo,

On Tue, 21 Jan 2020 at 11:56, Ludovic Court=C3=A8s <ludo@gnu.org> wrote:

> > The solution to your problem in my opinion is simply to expose just the
> > right amount of options through #:arguments for all build systems.
> > Would that be satisfactory to you?
>
> I think the issue of tweaking the build system and its implicit inputs
> must be addressed separately.  We first need a good API to do that.
> When we have it, it=E2=80=99ll be nice and easy to drive it via package
> parameters.  :-)

Now I have a better understanding about "package parameters", I agree
that it is 2 separate stories.


> Currently each build system has ad-hoc keyword parameters to customize
> its implicit inputs: #:python for =E2=80=98python-build-system=E2=80=99, =
#:cmake for
> =E2=80=98cmake-build-system=E2=80=99, #:implicit-inputs? for =E2=80=98gnu=
-build-system=E2=80=99, etc.
>
> For each of them, it would be quite easy to provide a procedure that
> takes a list of implicit inputs and returns a <build-system>.  It may
> not be all that convenient, and perhaps a bit too ad-hoc still.

I was inclined for this option. :-)


> Another option would be to make implicit inputs a field of
> <build-system>.

Not sure to understand...

> Needs more thought!

...so yes! :-)


Cheers,
simon