units: add unit that can auto-enables all suggested component/features

if enabled it will plug itself before systemd-sysupdate-update.service
and enable every component + feature that is suggested.

units/meson.build

@@ -872,6 +872,10 @@ units = [
           'file' : 'systemd-sysinstall@.service',
           'conditions' : ['ENABLE_SYSINSTALL'],
         },
+        {
+          'file' : 'systemd-sysupdate-auto-enable.service',
+          'conditions' : ['ENABLE_SYSUPDATE'],
+        },
         {
           'file' : 'systemd-sysupdate-reboot.service',
           'conditions' : ['ENABLE_SYSUPDATE'],

units/systemd-sysupdate-auto-enable.service

@@ -0,0 +1,21 @@
+#  SPDX-License-Identifier: LGPL-2.1-or-later
+#
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+[Unit]
+Description=Automatically Enable All Suggested Components & Features for System Updates
+Documentation=man:systemd-sysupdate-auto-enable.service(8)
+Before=systemd-sysupdate-update.service
+
+[Service]
+Type=oneshot
+ExecStart=systemd-sysupdate enable-component --component-suggested
+ExecStart=systemd-sysupdate enable-feature --component-all --feature-all
+
+[Install]
+WantedBy=systemd-sysupdate-update.service