systemd/system/checkupdates.service

   1 [Unit]
   2 Description=Check pacman updates and dowload packages to cache
   3 After=network-online.target
   4
   5 [Service]
   6 Type=oneshot
   7 ExecStart=/usr/bin/checkupdates -d
   8 # checkupdates returns 2 when there are no updates
   9 SuccessExitStatus=2
  10 Restart=on-failure
  11 RestartSec=5min