# Copyright (C) 2018 Red Hat, Inc.
#
# This library 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 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <https://www.gnu.org/licenses/>.

# For some implementation discussion, see:
# https://lists.freedesktop.org/archives/systemd-devel/2018-March/040557.html
[Unit]
Description=OSTree Finalize Staged Deployment
Documentation=man:ostree(1)
ConditionPathExists=/run/ostree-booted
DefaultDependencies=no

RequiresMountsFor=/sysroot /boot /etc
After=local-fs.target
Before=basic.target final.target
# We want to make sure the transaction logs are persisted to disk:
# https://bugzilla.redhat.com/show_bug.cgi?id=1751272
After=systemd-journal-flush.service
Conflicts=final.target

# Start the hold unit and ensure it stays active throughout this
# service.
Wants=ostree-finalize-staged-hold.service
After=ostree-finalize-staged-hold.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStop=/usr/bin/ostree admin finalize-staged
# This is a quite long timeout intentionally; the failure mode
# here is that people don't get an upgrade.  We need to handle
# cases with slow rotational media, etc.
TimeoutStopSec=5m
# OSTree should never touch /var at all...except, we need to remove
# the /var/.updated flag, so we can't just `InaccessiblePaths=/var` right now.
# For now, let's at least use ProtectHome just so we have some sandboxing
# of that.
ProtectHome=yes
# And we shouldn't affect the current deployment's /etc.
ReadOnlyPaths=/etc
# We write to /sysroot and /boot of course.
