bug#35640: Make USB modems just work on Guix

["Ludovic Courtès" <ludo@gnu.org>]

Hi Florian,

"pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis:

>From 5e9b45fe785dee52da2a67fbecbabc4741f85e54 Mon Sep 17 00:00:00 2001
> From: Florian Pelz <pelzflorian@pelzflorian.de>
> Date: Tue, 7 May 2019 11:51:43 +0200
> Subject: [PATCH 1/2] services: Include ModemManager in %desktop-services.
>
> * gnu/services/desktop.scm (%desktop-services): Add modem-manager-service-type.
> ---
>  gnu/services/desktop.scm | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/gnu/services/desktop.scm b/gnu/services/desktop.scm
> index 5e0bd102a2..c0300c0ddc 100644
> --- a/gnu/services/desktop.scm
> +++ b/gnu/services/desktop.scm
> @@ -1062,6 +1062,9 @@ dispatches events from it.")))
>  
>           ;; The D-Bus clique.
>           (service network-manager-service-type)
> +         (service modem-manager-service-type) ;the manual claims this were
> +                                              ;part of %desktop-services, but
> +                                              ;it wasn’t

The comment is unnecessary, but otherwise LGTM!

I’ve confirmed that there is no size increase:

--8<---------------cut here---------------start------------->8---
$ guix size network-manager | tail -1
total: 534.9 MiB
$ guix size network-manager modem-manager | tail -1
total: 534.9 MiB
--8<---------------cut here---------------end--------------->8---

>From d489f805599ea63e2e06727a3201572ee0480a60 Mon Sep 17 00:00:00 2001
> From: Florian Pelz <pelzflorian@pelzflorian.de>
> Date: Wed, 8 May 2019 20:02:00 +0200
> Subject: [PATCH 2/2] gnu: network-manager-applet: Propagate packages required
>  for USB modem setup.
>
> * gnu/packages/gnome.scm (network-manager-applet): Propagate iso-codes and
>   mobile-broadband-provider-info.
>   (gnome-control-center): Ditto.

Would it be an option to avoid propagation by instead substituting
references to these two things in the code of network-manager-applet and
gnome-control-center?  WDYT?

Thanks!

Ludo’.