moved disko needed configuration to disko.nix

modules/nixos-modules/disko.nix

@@ -20,6 +20,8 @@
       disk: lib.attrsets.nameValuePair (hashDisk disk) disk
     )
     config.host.storage.pool.cache;
+
+  datasets = config.host.storage.pool.datasets // config.host.storage.pool.extraDatasets;
 in {
   options.host.storage = {
     enable = lib.mkEnableOption "are we going create zfs disks with disko on this device";
@@ -63,6 +65,39 @@ in {
         description = "list of drives that are going to be used as cache";
         default = [];
       };
+      # Default datasets that are needed to make a functioning system
+      datasets = lib.mkOption {
+        type = lib.types.attrsOf (inputs.disko.lib.subType {
+          types = {inherit (inputs.disko.lib.types) zfs_fs zfs_volume;};
+        });
+        default = {
+          "local" = {
+            type = "zfs_fs";
+            options.canmount = "off";
+          };
+          # nix directory needs to be available pre persist and doesn't need to be snapshotted or backed up
+          "local/system/nix" = {
+            type = "zfs_fs";
+            mountpoint = "/nix";
+            options = {
+              atime = "off";
+              relatime = "off";
+              canmount = "on";
+            };
+          };
+          # dataset for root that gets rolled back on every boot
+          "local/system/root" = {
+            type = "zfs_fs";
+            mountpoint = "/";
+            options = {
+              canmount = "on";
+            };
+            postCreateHook = ''
+              zfs snapshot rpool/local/system/root@blank
+            '';
+          };
+        };
+      };
       extraDatasets = lib.mkOption {
         type = lib.types.attrsOf (inputs.disko.lib.subType {
           types = {inherit (inputs.disko.lib.types) zfs_fs zfs_volume;};
@@ -222,13 +257,15 @@ in {
             );
 
           datasets = lib.mkMerge [
-            (lib.attrsets.mapAttrs (name: value: {
+            (
+              lib.attrsets.mapAttrs (name: value: {
                 type = value.type;
                 options = value.options;
                 mountpoint = value.mountpoint;
                 postCreateHook = value.postCreateHook;
               })
-              config.host.storage.pool.extraDatasets)
+              datasets
+            )
           ];
         };
       };

modules/nixos-modules/impermanence.nix

@@ -38,33 +38,6 @@
         };
 
         host.storage.pool.extraDatasets = {
-          # local datasets are for data that should be considered ephemeral
-          "local" = {
-            type = "zfs_fs";
-            options.canmount = "off";
-          };
-          # nix directory needs to be available pre persist and doesn't need to be snapshotted or backed up
-          "local/system/nix" = {
-            type = "zfs_fs";
-            mountpoint = "/nix";
-            options = {
-              atime = "off";
-              relatime = "off";
-              canmount = "on";
-            };
-          };
-          # dataset for root that gets rolled back on every boot
-          "local/system/root" = {
-            type = "zfs_fs";
-            mountpoint = "/";
-            options = {
-              canmount = "on";
-            };
-            postCreateHook = ''
-              zfs snapshot rpool/local/system/root@blank
-            '';
-          };
-
           # persist datasets are datasets that contain information that we would like to keep around
           "persist" = {
             type = "zfs_fs";