home: Add home-restic-backup service.

* gnu/services/backup.scm: Drop mcron obsolete export.
(restic-backup-job-program): Generalize to restic-program.
(lower-restic-backup-job): New procedure implementing a standard way to
lower restic-backup-job records into lists.
(restic-program): Implement general way to run restic commands, for
example to initialize repositories.
(restic-backup-configuration): Reimplement
with (guix records).
(restic-backup-job-{logfile,command,requirement,modules}): Add new
procedures and add support for Guix Home environments.
(restic-backup-job->shepherd-service): Add support for Guix Home
environments.
(restic-backup-service-activation): Drop procedure as now the Shepherd
takes care of creating timers log file directories.
(restic-backup-service-type): Drop profile and activation services extensions.
* gnu/home/services/backup.scm: New file.
* gnu/local.mk: Add this.
* doc/guix.texi: Document this.

Change-Id: Ied1c0a5756b715fba176a0e42ea154246089e6be
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/gnu/home/services/backup.scm b/gnu/home/services/backup.scm
new file mode 100644
index 00000000000..ac977f835b6
--- /dev/null
+++ b/gnu/home/services/backup.scm
@@ -0,0 +1,38 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2025 Giacomo Leidi <goodoldpaul@autistici.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu home services backup)
+  #:use-module (gnu services)
+  #:use-module (gnu services backup)
+  #:use-module (gnu home services)
+  #:use-module (gnu home services shepherd)
+  #:export (home-restic-backup-service-type)
+  #:re-export (restic-backup-configuration
+               restic-backup-job))
+
+(define home-restic-backup-service-type
+  (service-type
+   (inherit (system->home-service-type restic-backup-service-type))
+   (extend
+    (lambda (config jobs)
+      (for-home
+       (restic-backup-configuration
+        (inherit config)
+        (jobs (append (restic-backup-configuration-jobs config)
+                      jobs))))))
+   (default-value (for-home (restic-backup-configuration)))))