nixpkgs/nixos/modules/hardware/brillo.nix


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

with lib;
let
  cfg = config.hardware.brillo;
in
{
  options = {
    hardware.brillo = {
      enable = mkEnableOption (lib.mdDoc ''
        brillo in userspace.
        This will allow brightness control from users in the video group
      '');
    };
  };

  config = mkIf cfg.enable {
    services.udev.packages = [ pkgs.brillo ];
    environment.systemPackages = [ pkgs.brillo ];
  };
}