extend desktop with xrandr. Usage: ./extend.sh [dir] where [dir] is 'left' or 'right' or 'clone'

extend.sh

#!/bin/bash

if [ -z "$1" ]; then
	xrandr --output HDMI1 --mode 0x0
else
	RES=`xrandr | grep -A1 HDMI1 | tail -n1 | awk '{ print $1 }'`
	echo "Detected HDMI1 with resolution ${RES}"

	if [ "$1" == "right" ] || [ "$1" == "left" ]; then
		echo "Extending HDMI1 to the {$1} of eDP1"
		xrandr --output HDMI1 --mode $RES
		sleep 1
		xrandr --output HDMI1 --$1-of eDP1
	else
		if [[ "$1" == "clone" ]]; then
			echo "Cloning eDP1 onto HDMI1"
			xrandr --output HDMI1 --mode $RES
			sleep 1
			xrandr --output HDMI1 --same-as eDP1
		else
      if [[ "$1" == "up" ]]; then
        echo "Extending HDMI1 above eDP1"
        xrandr --output HDMI1 --mode $RES
        sleep 1
        xrandr --output HDMI1 --above eDP1
      else
  			echo "Usage: ./extend.sh [dir]"
	  		echo "where [dir] is 'left' or 'right' or 'clone'"
      fi
		fi
	fi
fi