{
  config,
  lib,
  pkgs,
  ...
}:

with lib;

let
  cfg = config.custom.services.udev;
in
{
  options.custom.services.udev.enable = mkOption { default = false; };

  config = mkIf cfg.enable {
    # https://wiki.archlinux.org/title/Udev
    # Allow video group to change display brightness
    # https://raw.githubusercontent.com/ErikReider/SwayOSD/main/data/udev/99-swayosd.rules
    services.udev.extraRules =
      let
        chgrp = "${pkgs.coreutils}/bin/chgrp";
        chmod = "${pkgs.coreutils}/bin/chmod";
      in
      ''
        ACTION=="add", SUBSYSTEM=="backlight", RUN+="${chgrp} video /sys/class/backlight/%k/brightness"
        ACTION=="add", SUBSYSTEM=="backlight", RUN+="${chmod} g+w /sys/class/backlight/%k/brightness"
      '';
  };
}