enable or disable build-in display by shell function

buildin-display.sh

#!/usr/bin/env bash

buildin_display_name=eDP-1-1
displays=($(xrandr | grep " connected " | awk '{ print$1 }'))
display_count=${#displays[@]}

function enable-buildin-display() {
  if [ $display_count -gt 1 ]; then
    echo "disable buildin display: ${buildin_display_name}";
    xrandr --output "$buildin_display_name" --auto
  fi
}

function disable-buildin-display() {
  if [ $display_count -gt 1 ]; then
    echo "disable buildin display: ${buildin_display_name}";
    xrandr --output "$buildin_display_name"  --off
  fi
}

$ source buildin-display.sh
$ disable-buildin-display
$ enable-buildin-display