Move some (all) files around

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/system/configs/brightnessctl/default.nix

@@ -0,0 +1,32 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  environment.systemPackages = with pkgs; [ brightnessctl ];
+
+  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"
+      ACTION=="add", SUBSYSTEM=="leds",      RUN+="${chgrp} input /sys/class/leds/%k/brightness"
+      ACTION=="add", SUBSYSTEM=="leds",      RUN+="${chmod} g+w   /sys/class/leds/%k/brightness"
+    '';
+
+  users.groups =
+    let
+      members = builtins.attrNames (
+        lib.attrsets.filterAttrs (_: config: config.isNormalUser) config.users.users
+      );
+    in
+    {
+      video.members = members;
+      input.members = members;
+    };
+}