SACRED_SPACE="$1"
BLOCKERS="$2"
PERIOD="$3"

scrapePids() {
	for pid in $(ls /proc); do
	  if [[ "$pid" =~ ^[0-9]*$ ]]; then
	    if egrep -q $BLOCKERS /proc/$pid/comm; then
	      cat /proc/$pid/comm
	      readlink /proc/$pid/cwd
	      if [[ "$(readlink /proc/$pid/cwd)" == "$SACRED_SPACE"* ]]; then
          return 0
        fi
      fi
  	fi
	done
	return 1
}

notify-send "smooooth" "config change detected. waiting for blockers to resolve.."
while scrapePids; do
  echo "found blocker in $SACRED_SPACE, waiting.."
  sleep $PERIOD
done

echo "building system"
notify-send "smooooth" "rebuilding your nixos config - please stand by"
temp="$(mktemp -d)"
build="$temp/system"
nix build --out-link $build $SACRED_SPACE#nixosConfigurations.$HOSTNAME.config.system.build.toplevel

echo "built - attempting to activate system"
notify-send "smooooth" "activating your new config"
switch="$(readlink $build)/bin/switch-to-configuration"
pkexec $switch switch

echo "cleaning up"
rm -r $temp