Fish shell function to toggle lid-close sleep on Arch Linux (systemd)

lid-sleep.fish

# https://gist.github.com/ElijahLynn/adf761215c85a5d8136ced38d4022ddd
function lid-sleep --description "Toggle or check lid-close sleep behaviour"
    set config /etc/systemd/logind.conf.d/lid.conf

    switch $argv[1]
        case help --help -h
            echo "Usage: lid-sleep [on|off|status|help]"
            echo ""
            echo "  on      Re-enable sleep when the lid is closed"
            echo "  off     Prevent sleep when the lid is closed"
            echo "  status  Show whether lid-close sleep is on or off (default when no arg given)"
            echo "  help    Show this help message"
            echo ""
            echo "Config is written to /etc/systemd/logind.conf.d/lid.conf."
            echo "Changes take effect immediately via SIGHUP to systemd-logind."

        case status ''
            if test -f $config
                echo "lid-sleep: OFF (closing lid will NOT sleep)"
            else
                echo "lid-sleep: ON (closing lid will sleep)"
            end

        case on
            if test -f $config
                sudo rm $config
                # why kill --signal=HUP: sends HUP to the running process so logind reloads
                # its config in-place. `systemctl restart` would stop the service and log you out.
                and sudo systemctl kill --signal=HUP systemd-logind
                and echo "lid-sleep: ON — lid close will now sleep"
            else
                echo "lid-sleep: already ON"
            end

        case off
            if not test -f $config
                sudo mkdir --parents (dirname $config)
                echo '[Login]
HandleLidSwitch=ignore
HandleLidSwitchExternalPower=ignore' | sudo tee $config > /dev/null
                # why kill --signal=HUP: sends HUP to the running process so logind reloads
                # its config in-place. `systemctl restart` would stop the service and log you out.
                and sudo systemctl kill --signal=HUP systemd-logind
                and echo "lid-sleep: OFF — lid close will no longer sleep"
            else
                echo "lid-sleep: already OFF"
            end

        case '*'
            echo "Unknown argument: $argv[1]. Run 'lid-sleep help' for usage."
            return 1
    end
end