feat(modules/hardware/nvidia): add nvidia configuration

modules/nixos/hardware/default.nix

@@ -2,14 +2,21 @@
 {
   imports = [
     ./btrfs.nix
+    ./nvidia.nix
   ];
 
-  options = {
-    hardware.drives.btrfs.enable = lib.mkEnableOption "";
-    hardware.drives.btrfs.drive = lib.mkOption {
+  options.hardware = {
+    drives.btrfs = {
+      enable = lib.mkEnableOption "";
+      drive = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+      }; 
+      ephemeralRoot = lib.mkEnableOption "";
+    };
+    gpu = lib.mkOption {
       type = lib.types.str;
-      default = "";
-    }; 
-    hardware.drives.btrfs.ephemeralRoot = lib.mkEnableOption "";
+        default = "";
+    };
   };
 }

modules/nixos/hardware/nvidia.nix

@@ -0,0 +1,16 @@
+{ lib, config, pkgs, ... }:
+{
+  config = lib.mkIf (config.hardware.gpu == "nvidia") (lib.mkMerge [
+    {
+      #TODO: Setup CUDA
+      hardware.graphics.enable = true;
+      hardware.graphics.extraPackages = with pkgs; [
+	nvidia-vaapi-driver
+      ];
+      services.xserver.videoDrivers = [ "nvidia" ];
+      hardware.nvidia.open = true;
+      hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.latest;
+      nixpkgs.config.allowUnfree = true;
+    }
+  ]);
+}

systems/x86_64-linux/nemesis/default.nix

@@ -5,6 +5,7 @@
     drive = "/dev/disk/by-id/nvme-CT2000P3SSD8_2325E6E77434";
     ephemeralRoot = true;
   };
+  hardware.gpu = "nvidia";
 
   boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
   boot.initrd.kernelModules = [ "dm-snapshot" ];