google-compute-image: use virtualisation.diskSize

nixos/modules/virtualisation/google-compute-image.nix

@@ -16,21 +16,28 @@ let
       ];
     }
   '';
+  virtualisationOptions = import ./virtualisation-options.nix;
 in
 {
 
-  imports = [ ./google-compute-config.nix ];
+  imports = [
+    ./google-compute-config.nix
+    virtualisationOptions.diskSize
+    (lib.mkRenamedOptionModuleWith {
+      sinceRelease = 2411;
+      from = [
+        "virtualisation"
+        "googleComputeImage"
+        "diskSize"
+      ];
+      to = [
+        "virtualisation"
+        "diskSize"
+      ];
+    })
+  ];
 
   options = {
-    virtualisation.googleComputeImage.diskSize = mkOption {
-      type = with types; either (enum [ "auto" ]) int;
-      default = "auto";
-      example = 1536;
-      description = ''
-        Size of disk image. Unit is MB.
-      '';
-    };
-
     virtualisation.googleComputeImage.configFile = mkOption {
       type = with types; nullOr str;
       default = null;
@@ -86,7 +93,7 @@ in
       format = "raw";
       configFile = if cfg.configFile == null then defaultConfigFile else cfg.configFile;
       partitionTableType = if cfg.efi then "efi" else "legacy";
-      inherit (cfg) diskSize;
+      inherit (config.virtualisation) diskSize;
       inherit config lib pkgs;
     };