wake-on-lan: move to module

hosts/snowhawk/configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running `nixos-help`).
 
-{ pkgs, inputs, lib, config, ... }:
+{ pkgs, inputs, config, ... }:
 
 {
   imports = [
@@ -19,6 +19,7 @@
 
   snowhawk = {
     nix-ld.enable = true;
+    wake-on-lan.enable = true;
     dwm.enable = true;
     syncthing.enable = true;
     plymouth.enable = true;
@@ -104,17 +105,6 @@
 
   services.avahi.enable = true;
 
-  systemd.services.wakeonlan = {
-    description = "reenable wakeonlan every boot";
-    after = [ "network.target" ];
-    serviceConfig = {
-      Type = "simple";
-      RemainAfterExit = "true";
-      ExecStart = "${lib.getExe pkgs.ethtool} -s enp7s0 wol g";
-    };
-    wantedBy = [ "default.target" ];
-  };
-
   # Open ports in the firewall.
   # networking.firewall.allowedTCPPorts = [ ... ];
   # networking.firewall.allowedUDPPorts = [ ... ];

modules/wake-on-lan.nix

@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkIf mkEnableOption;
+
+  cfg = config.snowhawk.wake-on-lan;
+in
+{
+  options.snowhawk.wake-on-lan = {
+    enable = mkEnableOption "wake-on-lan nixos module";
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.wakeonlan = {
+      description = "reenable wakeonlan every boot";
+      after = [ "network.target" ];
+      serviceConfig = {
+        Type = "simple";
+        RemainAfterExit = "true";
+        ExecStart = "${lib.getExe pkgs.ethtool} -s enp7s0 wol g";
+      };
+      wantedBy = [ "default.target" ];
+    };
+  };
+}