Modularize libvirt

modules/default.nix

@@ -11,6 +11,7 @@
     ./fish.nix
     ./fonts.nix
     ./kvm-switch-enable-screen.nix
+    ./libvirt.nix
     ./localization.nix
     ./mute-indicator.nix
     ./nix.nix

modules/libvirt.nix

@@ -0,0 +1,31 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.myConfig;
+in
+{
+  options.myConfig = {
+    libvirt = {
+      enable = pkgs.lib.mkEnableOption "Enable libvirt";
+    };
+  };
+  config = lib.mkIf cfg.libvirt.enable {
+    environment.systemPackages = with pkgs; [
+      spice-gtk
+      virt-manager
+    ];
+    virtualisation = {
+      docker.enable = true;
+      libvirtd = {
+        enable = true;
+        qemu.ovmf.enable = true;
+
+        # start:  starts all guests that were running prior to shutdown
+        # ignore: only start guests which are marked as autostart
+        onBoot = "ignore";
+
+        onShutdown = "shutdown";
+      };
+    };
+  };
+}