Detecting external monitor changes and reconfiguring X Displays and reloading Window manager on Arch MacBookAir5,2

99-local.rules

# put this in /etc/udev/rules.d
# It's important that it starts with 99 or something high
# If this file is 10-local.rules it will fail to run the scripts
ACTION=="change", SUBSYSTEM=="drm", RUN+="/etc/udev/monitor.change.sh"

monitor.change.sh

#!/bin/bash

status="$(cat /sys/class/drm/card0-HDMI-A-1/status)"
enabled="$(cat /sys/class/drm/card0-HDMI-A-1/enabled)"
export DISPLAY=:0
export XAUTHORITY=/home/hh/.Xauthority

if [ "${status}" = disconnected ]; then
    if [ "${enabled}" = enabled ]; then
        /usr/bin/xrandr --auto
        killall awesome -SIGHUP
    fi
elif [ "${status}" = connected ]; then
    if [ "${enabled}" = disabled ]; then
        /usr/bin/xrandr --output HDMI1 --auto --left-of eDP1
        killall awesome -SIGHUP
    fi
else
    /usr/bin/xrandr --auto
fi