nixos/pkgs/wallpaper-changer/wallpaper-changer.sh

set +o errexit
set +o nounset
set +o pipefail
script_name=${BASH_SOURCE[0]}
for pid in $(pidof -x "$script_name"); do
    if [ "$pid" != $$ ]; then
        kill -15 "$pid"
    fi 
done

[ "$XDG_SESSION_TYPE" != "wayland" ] && echo "Not a Wayland session, exiting." && exit 1
wallpaper_dir="$HOME/.local/share/bg/"

swww_daemon_pid=$(pidof -x 'swww-daemon')
swww_pid=$(pidof -x 'swww')

[ -z "$swww_daemon_pid" ] || kill -15 "$swww_daemon_pid"
[ -z "$swww_pid" ] || kill -15 "$swww_pid"
swww-daemon &

while true; do
    find "$wallpaper_dir" -type f -follow \( -iname \*.jpg -o -iname \*.png -o -iname \*.gif -o -iname \*.bmp \) | shuf | while read -r file; do
        swww img "$file" --transition-step 10 --transition-fps 60
        sleep 600
    done
done