From mboxrd@z Thu Jan  1 00:00:00 1970
From: Timothy Sample <samplet@ngyro.com>
Subject: Re: how to make fonts available to a service?
Date: Sat, 13 Jul 2019 11:29:04 -0400
Message-ID: <87pnmenebj.fsf@ngyro.com>
References: <2922F2BE-80D0-4A9E-8F74-AF02546E032A@vllmrt.net>
 <087B3C4D-4A3D-435B-826A-0BD2D475A122@vllmrt.net>
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 ([2001:470:142:3::10]:60447)
 by lists.gnu.org with esmtp (Exim 4.86_2)
 (envelope-from <samplet@ngyro.com>) id 1hmJxZ-0005Wx-L3
 for guix-devel@gnu.org; Sat, 13 Jul 2019 11:29:14 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <samplet@ngyro.com>) id 1hmJxX-0002KR-Ok
 for guix-devel@gnu.org; Sat, 13 Jul 2019 11:29:13 -0400
Received: from out1-smtp.messagingengine.com ([66.111.4.25]:34717)
 by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)
 (Exim 4.71) (envelope-from <samplet@ngyro.com>) id 1hmJxX-0002HE-Cu
 for guix-devel@gnu.org; Sat, 13 Jul 2019 11:29:11 -0400
In-Reply-To: <087B3C4D-4A3D-435B-826A-0BD2D475A122@vllmrt.net> (Robert
 Vollmert's message of "Sat, 13 Jul 2019 16:59:59 +0200")
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.org@gnu.org
Sender: "Guix-devel" <guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org>
To: Robert Vollmert <rob@vllmrt.net>
Cc: guix-devel@gnu.org

Hi Robert,

Robert Vollmert <rob@vllmrt.net> writes:

>> On 12. Jul 2019, at 22:42, Robert Vollmert <rob@vllmrt.net> wrote:
>> I=E2=80=99m a bit at a loss right now with respect to how to make fonts =
available
>> to system services.
>>=20
>> I=E2=80=99m running a service that uses rsvg-convert (from package librs=
vg) to
>> raster some SVG graphics. However, it appears that the default fonts
>> are missing some Unicode character.
>>=20
>> It seems that I can make fonts available in my user profile by installing
>> the corresponding font package, and those would be available to rsvg-con=
vert
>> via fontconfig via ~/.guix-profile/share/fonts. But how would I do the
>> same for a service?
>
> It turns out this was easy to fix, by adding a font package to the list
> of installed packages in the operating system definition.
>
> (and apologies for sending this to -devel instead of help-)

Just so you know, you can extend the =E2=80=9Cprofile-service-type=E2=80=9D=
 in your
service type definition to add packages to the system profile.  It=E2=80=99s
kind of like having propagated inputs for your service.  The GDM service
needs to make fonts available, so it (effectively) does the following.

    (service-type (name 'gdm)
                    (extensions
                     (list ...
                           (service-extension profile-service-type
                                              (list font-cantarell))
                           ...))
                    ...)

Hope that helps!


-- Tim