Add "light" package and setuid wrapper

lib/maintainers.nix

@@ -116,6 +116,7 @@
   pkmx = "Chih-Mao Chen <pkmx.tw@gmail.com>";
   plcplc = "Philip Lykke Carlsen <plcplc@gmail.com>";
   pSub = "Pascal Wittmann <mail@pascal-wittmann.de>";
+  puffnfresh = "Brian McKenna <brian@brianmckenna.org>";
   qknight = "Joachim Schiele <js@lastlog.de>";
   raskin = "Michael Raskin <7c6f434c@mail.ru>";
   redbaron = "Maxim Ivanov <ivanov.maxim@gmail.com>";

nixos/modules/module-list.nix

@@ -58,6 +58,7 @@
   ./programs/dconf.nix
   ./programs/environment.nix
   ./programs/info.nix
+  ./programs/light.nix
   ./programs/nano.nix
   ./programs/screen.nix
   ./programs/shadow.nix

nixos/modules/programs/light.nix

@@ -0,0 +1,26 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.light;
+
+in
+{
+  options = {
+    programs.light = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Whether to install Light backlight control with setuid wrapper.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ pkgs.light ];
+    security.setuidPrograms = [ "light" ];
+  };
+}

pkgs/os-specific/linux/light/default.nix

@@ -0,0 +1,20 @@
+{ stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  version = "0.9";
+  name = "light-${version}";
+  src = fetchurl {
+    url = "https://github.com/haikarainen/light/archive/v${version}.tar.gz";
+    sha256 = "1dnzkkg307izvw76gvzsl2vpxd2a1grxg5h82ix505rb9nnmn0d6";
+  };
+
+  installPhase = "mkdir -p $out/bin; cp light $out/bin/";
+
+  meta = {
+    description = "GNU/Linux application to control backlights";
+    homepage = https://haikarainen.github.io/light/;
+    license = stdenv.lib.licenses.gpl3;
+    maintainers = with stdenv.lib.maintainers; [ puffnfresh ];
+    platforms = stdenv.lib.platforms.linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -7997,6 +7997,8 @@ let
     then utillinux
     else null;
 
+  light = callPackage ../os-specific/linux/light { };
+
   e3cfsprogs = callPackage ../os-specific/linux/e3cfsprogs { };
 
   ebtables = callPackage ../os-specific/linux/ebtables { };