refactor(nixosmodules): move boot config to module

nixosModules/boot.nix

@@ -0,0 +1,51 @@
+{
+  config,
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}:
+let
+  moduleName = "boot-config";
+  cfg = config."${moduleName}";
+in
+{
+  options = {
+    "${moduleName}" = {
+      enable = lib.mkEnableOption "Enable ${moduleName}.";
+      bootloader = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        example = "systemd-boot";
+        description = "What bootloader to use.";
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    boot = {
+      loader =
+        {
+          timeout = 5;
+          efi.canTouchEfiVariables = true;
+        }
+        // lib.mkIf (cfg.bootloader == "systemd-boot") {
+          systemd-boot.enable = true;
+          systemd-boot.configurationLimit = 5;
+        };
+      kernelPackages = lib.mkDefault pkgs.linuxPackages_latest;
+      initrd.availableKernelModules = [
+        "ahci"
+        "nvme"
+        "sd_mod"
+        "usb_storage"
+        "usbhid"
+        "xhci_pci"
+        "rtsx_pci_sdmmc"
+      ];
+    };
+    services.dbus = {
+      enable = true;
+    };
+  };
+}

nixosModules/default.nix

@@ -11,10 +11,13 @@ in
 {
   imports = [
     ./nix-config.nix
+    ./boot.nix
   ];
 
   options = {
-    "${moduleName}".enable = lib.mkEnableOption "Enable ${moduleName}.";
+    "${moduleName}" = {
+      enable = lib.mkEnableOption "Enable ${moduleName}.";
+    };
   };
 
   config = lib.mkIf cfg.enable {

nixosModules/nix-config.nix

@@ -10,7 +10,9 @@ let
 in
 {
   options = {
-    "${moduleName}".enable = lib.mkEnableOption "Enable ${moduleName}.";
+    "${moduleName}" = {
+      enable = lib.mkEnableOption "Enable ${moduleName}.";
+    };
   };
 
   config = lib.mkIf cfg.enable {