Improve folder structure

nix/modules/g810-led.nix

@@ -0,0 +1,60 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.hardware.g810-led;
+in
+{
+  options.hardware.g810-led = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether to apply a g810-led profile when a compatible keyboard
+        is connected.
+      '';
+    };
+
+    profile = mkOption {
+      type = types.path;
+      description = ''
+        The profile file to be applied, samples can be found at:
+        https://github.com/MatMoul/g810-led/tree/master/sample_profiles
+      '';
+    };
+
+    enableFlashingWorkaround = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether to turn off all LEDs on shutdown and reboot.
+        Enable this if your keyboard flashes 3 times on boot.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    services.udev.packages = [
+      (pkgs.g810-led.override { profile = cfg.profile; })
+    ];
+
+    # Workaround mentioned here:
+    # https://github.com/MatMoul/g810-led/blob/14e331ad2ab7c5ffb546e0c14dd6164b517ff9ca/PROFILES.md
+    systemd.services.g810-led-workaround = mkIf cfg.enableFlashingWorkaround {
+      description = "Turn off all g810-led keys";
+      script = "${pkgs.g810-led}/bin/g810-led -a 000000";
+
+      serviceConfig.Type = "oneshot";
+      unitConfig.DefaultDependencies = false;
+
+      wantedBy = [ "shutdown.target" ];
+      before = [ "shutdown.target" "reboot.target" "halt.target" ];
+    };
+  };
+
+  meta.maintainers = [ maintainers.davegallant ];
+
+}
+