change-wallpaper.sh

#!/bin/sh

# split the wallpaper for two monitors
sudo convert -crop 1200x1920 $1 /etc/lightdm/background-%d.jpg
feh --bg-scale /etc/lightdm/background-0.jpg --bg-scale /etc/lightdm/background-1.jpg

# convert wallpaper to PNG, because i3lock doesn't handle the JPG.
sudo convert $1 /etc/lightdm/background.png

# create the color scheme from wallpaper
wal -nqti $1

# restart polybar to applay the new color scheme
pkill polybar
SHELL=$(which sh) polybar -r -q left &
SHELL=$(which sh) polybar -r -q right &