home/.config/polybar/launch.sh

#! /bin/bash
#
# launch.sh
# A Polybar launch script with a heck of a lot of compat
# Copyright (C) 2019 Vintage Salt <rehashedsalt@cock.li>
#
# Distributed under terms of the MIT license.
#

log() {
	[ -z "$1" ] && return 1
	printf "$1\\n"
}

# Trap our exit
die() {
	kill $(jobs -p)
}
trap die EXIT

# Steps
step_fallback() {
	if ! command -v polybar > /dev/null 2>&1; then
		if command -v tint2 > /dev/null 2>&1; then
			log "Executing fallback"
			exec tint2
		fi
		log "No valid bars found"
		exit 51
	fi
}
step_configure_restack() {
	# Restack compatibility
	if pgrep -U "$UID" bspwm > /dev/null 2>&1; then
		export PB_WM_RESTACK="bspwm"
	elif pgrep -U "$UID" i3 > /dev/null 2>&1; then
		export PB_WM_RESTACK="i3"
	fi
}
step_spawn_primary() {
	# Spawn bars on the primary monitor
	log "Spawning primary bars"
	export PB_MONITOR=$(xrandr -q | awk '/primary/{print $1}')
	polybar -r primary &
	polybar -r primary-2 &
}
step_spawn_secondary() {
	# Spawn more for each secondary
	log "Spawning secondary bars"
	local secondary_monitors=$(xrandr -q | grep ' connected' | grep -v 'primary' | awk '{print $1}')
	[ -z "$secondary_monitors" ] && return 0
	for monitor in $secondary_monitors; do
		export PB_MONITOR=$monitor
		polybar -r secondary &
		polybar -r secondary-2 &
	done
}
step_wait() {
	# And wait
	log "Waiting"
	wait
}

# Main
main() {
	step_fallback
	step_configure_restack
	step_spawn_primary
	step_spawn_secondary
	step_wait
}

main "$@"