From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:470:142:3::10]:52861)
 by lists.gnu.org with esmtp (Exim 4.86_2)
 (envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1hagnn-0005FY-DG
 for guix-patches@gnu.org; Tue, 11 Jun 2019 09:27:04 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1hagnm-0001kh-0F
 for guix-patches@gnu.org; Tue, 11 Jun 2019 09:27:03 -0400
Received: from debbugs.gnu.org ([209.51.188.43]:44645)
 by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16)
 (Exim 4.71) (envelope-from <Debian-debbugs@debbugs.gnu.org>)
 id 1hagnl-0001kX-Sl
 for guix-patches@gnu.org; Tue, 11 Jun 2019 09:27:01 -0400
Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2)
 (envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1hagnl-0002Gr-Lb
 for guix-patches@gnu.org; Tue, 11 Jun 2019 09:27:01 -0400
Subject: [bug#36162] [PATCH 0/4] Add 'remote-eval'
Resent-Message-ID: <handler.36162.B36162.15602596108712@debbugs.gnu.org>
References: <20190610210853.5709-1-ludo@gnu.org>
From: Ricardo Wurmus <rekado@elephly.net>
In-reply-to: <20190610210853.5709-1-ludo@gnu.org>
Date: Tue, 11 Jun 2019 15:26:40 +0200
Message-ID: <87pnnk9rsf.fsf@elephly.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
List-Id: <guix-patches.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/guix-patches>,
 <mailto:guix-patches-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/guix-patches>
List-Post: <mailto:guix-patches@gnu.org>
List-Help: <mailto:guix-patches-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/guix-patches>,
 <mailto:guix-patches-request@gnu.org?subject=subscribe>
Errors-To: guix-patches-bounces+kyle=kyleam.com@gnu.org
Sender: "Guix-patches" <guix-patches-bounces+kyle=kyleam.com@gnu.org>
To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: 36162@debbugs.gnu.org


Ludovic Court=C3=A8s <ludo@gnu.org> writes:

> This patch series add =E2=80=98remote-eval=E2=80=99, which takes a gexp, =
remotely deploys
> everything the gexp refers to, and evaluates it (see
> <https://lists.gnu.org/archive/html/guix-devel/2019-03/msg00127.html> for
> the initial discussion.)  So you can have gexps like:
>
>   #~(execl #$(file-append ffmpeg "/bin/ffmpeg") =E2=80=A6)
>
> When you evaluate it, this specific =E2=80=98ffmpeg=E2=80=99 will be depl=
oyed over there.
> Another example is:
>
>   (with-imported-modules (source-module-closure '((gnu services herd)))
>     #~(begin
>         (use-modules (gnu services herd))
>         (map live-service-provision (current-services))))

> This gexp, when evaluated remotely, will use your very own (gnu services
> herd) module and the corresponding Guile (so if you=E2=80=99re on Guile 3=
 and the
> remote is still on Guile 2, that=E2=80=99s fine: Guile 3 will first be de=
ployed
> there.)
>
> =E2=80=98remote-eval=E2=80=99 allows you to build locally and send the bu=
ild results,
> or to send the derivations and build remotely.

This is great and just what I need for the install-berlin.scm script in
the =E2=80=9Cmaintenance=E2=80=9D repository where I need to deploy a parti=
cular version
of Guix to the target system before using that version of Guix to
reconfigure the remote system.

Thank you!

--
Ricardo