hints() {
    echo "-------------------------------------------------------------------------------------------------------"
    echo "Run 'systemctl --user start bing-wallpaper.service' to start the service"
    echo "Run 'systemctl --user enable bing-wallpaper.service' for autostart bing-wallpaper."
    echo "You may need set the enviroment variables to make it works."
    echo "See https://wiki.archlinux.org/index.php/Systemd/User#Environment_variables"
    echo "-------------------------------------------------------------------------------------------------------"
}

post_install() {
    hints
}

post_upgrade() {
    hints
}