treewide: use auto diskSize for make-disk-image

nixos/maintainers/scripts/cloudstack/cloudstack-image.nix

@@ -10,7 +10,6 @@ with lib;
 
   system.build.cloudstackImage = import ../../../lib/make-disk-image.nix {
     inherit lib config pkgs;
-    diskSize = 8192;
     format = "qcow2";
     configFile = pkgs.writeText "configuration.nix"
       ''

nixos/maintainers/scripts/ec2/amazon-image.nix

@@ -40,8 +40,9 @@ in {
     };
 
     sizeMB = mkOption {
-      type = types.int;
+      type = with types; either (enum [ "auto" ]) int;
-      default = if config.ec2.hvm then 2048 else 8192;
+      default = "auto";
+      example = 8192;
       description = "The size in MB of the image";
     };
 

nixos/maintainers/scripts/openstack/openstack-image.nix

@@ -12,8 +12,8 @@ with lib;
 
   system.build.openstackImage = import ../../../lib/make-disk-image.nix {
     inherit lib config;
+    additionalSpace = "1024M";
     pkgs = import ../../../.. { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package
-    diskSize = 8192;
     format = "qcow2";
     configFile = pkgs.writeText "configuration.nix"
       ''

nixos/modules/virtualisation/azure-image.nix

@@ -9,8 +9,9 @@ in
 
   options = {
     virtualisation.azureImage.diskSize = mkOption {
-      type = with types; int;
+      type = with types; either (enum [ "auto" ]) int;
-      default = 2048;
+      default = "auto";
+      example = 2048;
       description = ''
         Size of disk image. Unit is MB.
       '';

nixos/modules/virtualisation/digital-ocean-image.nix

@@ -10,8 +10,9 @@ in
 
   options = {
     virtualisation.digitalOceanImage.diskSize = mkOption {
-      type = with types; int;
+      type = with types; either (enum [ "auto" ]) int;
-      default = 4096;
+      default = "auto";
+      example = 4096;
       description = ''
         Size of disk image. Unit is MB.
       '';

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

@@ -18,8 +18,9 @@ in
 
   options = {
     virtualisation.googleComputeImage.diskSize = mkOption {
-      type = with types; int;
+      type = with types; either (enum [ "auto" ]) int;
-      default = 1536;
+      default = "auto";
+      example = 1536;
       description = ''
         Size of disk image. Unit is MB.
       '';

nixos/modules/virtualisation/hyperv-image.nix

@@ -9,8 +9,9 @@ in {
   options = {
     hyperv = {
       baseImageSize = mkOption {
-        type = types.int;
+        type = with types; either (enum [ "auto" ]) int;
-        default = 2048;
+        default = "auto";
+        example = 2048;
         description = ''
           The size of the hyper-v base image in MiB.
         '';

nixos/modules/virtualisation/virtualbox-image.nix

@@ -11,8 +11,9 @@ in {
   options = {
     virtualbox = {
       baseImageSize = mkOption {
-        type = types.int;
+        type = with types; either (enum [ "auto" ]) int;
-        default = 50 * 1024;
+        default = "auto";
+        example = 50 * 1024;
         description = ''
           The size of the VirtualBox base image in MiB.
         '';

nixos/modules/virtualisation/vmware-image.nix

@@ -18,8 +18,9 @@ in {
   options = {
     vmware = {
       baseImageSize = mkOption {
-        type = types.int;
+        type = with types; either (enum [ "auto" ]) int;
-        default = 2048;
+        default = "auto";
+        example = 2048;
         description = ''
           The size of the VMWare base image in MiB.
         '';