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
    echo "Exiting: Already running..."
    exit
fi

logger "${scriptname} started"

function handle {
    case $1 in
        monitoraddedv2*)
            external_output=$(hyprctl monitors | awk '/Monitor DP-/ {print $2 }')
            sed -i "s/\"output.*/\"output\": \[\"${external_output}\"\],/" ~/.config/waybar/config
            sleep 1
            killall -SIGUSR2 waybar
            ;;
        monitorremoved*)
            laptop_output='"eDP-1"'
            sed -i "s/\"output.*/\"output\": \[${laptop_output}\],/" ~/.config/waybar/config
            sleep 1
            killall -SIGUSR2 waybar
            ;;
    esac
}

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