configuration.nix/packages/scripts/power-menu.sh

#!/bin/sh

set -eu

chpower() {
  case "$1" in
    "")
    ;;
    Shutdown)
      exec systemctl poweroff
    ;;
    Reboot)
      exec systemctl reboot
    ;;
    Hibernate)
      exec systemctl hibernate
    ;;
    *)
      notify-send -t 1500 -u low "Invalid Option"
    ;;
  esac
}

OPTIONS="Shutdown\nReboot\nHibernate"

chpower "$(printf "%b" "$OPTIONS" | sort | rofi -dmenu -p "Power Menu")"