#!/usr/bin/env nix-shell
#!nix-shell -i bash -p bash -p brightnessctl
dev="$1"
if [ -z "$dev" ]; then
  dev="white:flash"
fi

if [ "$(brightnessctl -d "$dev" get)" -gt 0 ]; then
  brightnessctl -q -d "$dev" set "0%"
else
  brightnessctl -q -d "$dev" set "100%"
fi