Hyprland waybar switch by monitor hotpluging

waybar-monitor-hotplug.sh

#!/bin/bash
#
# This script is for people like me running a laptop with external monitor and using the
# external monitor as the main output. As main output I want to have the waybar show up
# on it. With this script you get waybar on external monitor and when you unplug it - it
# will automatically change the display to Your display and vice versa.
#
# just put the following into your hyprland.conf:
#   exec-once = waybar
#   exec-once = ~/.config/hypr/scripts/waybar-monitor-switch.sh


# stop running it twice
scriptname=$(basename $0)
running_count=$(ps aux | grep -i "${scriptname}" | grep -v "grep" | wc -l)
if [ $running_count -gt 2  ]; then
    exit
fi

external_output='"DP-5", "DP-6"'
laptop_output='"eDP-1"'

function handle {
    case $1 in
        monitoraddedv2*)
            sed -i "s/\"output.*/\"output\": \[${external_output}\],/" ~/.config/waybar/config
            sleep 2
            killall waybar ; waybar &
            ;;
        monitorremoved*)
            sed -i "s/\"output.*/\"output\": \[${laptop_output}\],/" ~/.config/waybar/config
            sleep 2
            killall waybar ; waybar &
            ;;
    esac
}

socat -U - UNIX-CONNECT:/tmp/hypr/$HYPRLAND_INSTANCE_SIGNATURE/.socket2.sock | while read -r line; do handle "$line"; done