hosts/ni: modularize parts of the hardware setup

hosts/ni/default.nix

@@ -26,6 +26,7 @@
   ];
 
   hosts.ni = {
+    hardware.qol.enable = true;
     networking.setup = "networkmanager";
     networking.wireguard.enable = true;
   };

hosts/ni/hardware-configuration.nix

@@ -47,31 +47,10 @@
   powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
   hardware.cpu.intel.updateMicrocode = lib.mkDefault true;
 
-  # We're using some better filesystems so we're using it.
-  boot.initrd.supportedFilesystems = [ "btrfs" ];
-  boot.supportedFilesystems = [ "btrfs" ];
-
   services.btrfs.autoScrub = {
     enable = true;
     fileSystems = [
       "/mnt/archives"
     ];
   };
-
-  # Set up printers.
-  services.printing = {
-    enable = true;
-    browsing = true;
-    drivers = with pkgs; [
-      gutenprint
-      hplip
-      splix
-    ];
-  };
-
-  # Make your CPU more useful.
-  services.auto-cpufreq.enable = true;
-
-  # Extend the life of an SSD.
-  services.fstrim.enable = true;
 }

hosts/ni/modules/default.nix

@@ -1,6 +1,7 @@
 # Only optional modules should be imported here.
 {
   imports = [
+    ./hardware/qol.nix
     ./networking/setup.nix
     ./networking/wireguard.nix
   ];

hosts/ni/modules/hardware/qol.nix

@@ -0,0 +1,33 @@
+# Some quality-of-life features for your hardware.
+{ config, lib, pkgs, ... }:
+
+let
+  hostCfg = config.hosts.ni;
+  cfg = hostCfg.hardware.qol;
+in
+{
+  options.hosts.ni.hardware.qol.enable = lib.mkEnableOption "quality-of-life hardware features";
+
+  config = lib.mkIf cfg.enable {
+    # We're using some better filesystems so we're using it.
+    boot.initrd.supportedFilesystems = [ "btrfs" ];
+    boot.supportedFilesystems = [ "btrfs" ];
+
+    # Set up printers.
+    services.printing = {
+      enable = true;
+      browsing = true;
+      drivers = with pkgs; [
+        gutenprint
+        hplip
+        splix
+      ];
+    };
+
+    # Make your CPU more useful.
+    services.auto-cpufreq.enable = true;
+
+    # Extend the life of an SSD.
+    services.fstrim.enable = true;
+  };
+}