# Requires following line in sudoers allowing users in wheel 
# to download packages without password
# %wheel ALL=(ALL) NOPASSWD: /usr/bin/pacman -Sw --noconfirm * --dbpath *

[Unit]
Description=Check pacman updates and dowload packages to cache
After=network-online.target

[Service]
Type=oneshot
ExecStart=/usr/bin/checkupdates -d
# checkupdates returns 2 when there are no updates
SuccessExitStatus=2