[Unit]
Description=HAPX-UI self-update — STEP 2: activate staged binary (restart + rollback)
# Triggered by the web UI (after the operator confirms) via
# `systemctl start --no-block`. It swaps in /var/lib/hapx-ui-staging/hapx-ui.staged,
# restarts hapx-ui, health-checks the new version and auto-rolls-back (binary +
# DB) on failure.
#
# It MUST run independently of hapx-ui.service: this step stops/restarts hapx-ui,
# and with hapx-ui's KillMode=control-group a swap driven from inside that
# service's cgroup would be SIGTERM'd mid-activate. As its own transient unit
# under PID 1 it has its own cgroup and survives the restart.
After=network-online.target
Wants=network-online.target

[Service]
Type=oneshot
ExecStart=/usr/local/sbin/hapx-ui-update activate

# No [Install] section — this unit is started on demand, never enabled at boot.