split disko type into multiple files

types/zfs.nix

@@ -0,0 +1,47 @@
+{ config, options, lib, diskoLib, ... }:
+{
+  options = {
+    type = lib.mkOption {
+      type = lib.types.enum [ "zfs" ];
+      internal = true;
+      description = "Type";
+    };
+    pool = lib.mkOption {
+      type = lib.types.str;
+      description = "Name of the ZFS pool";
+    };
+    _meta = lib.mkOption {
+      internal = true;
+      readOnly = true;
+      type = lib.types.functionTo diskoLib.jsonType;
+      default = dev: {
+        deviceDependencies.zpool.${config.pool} = [ dev ];
+      };
+      description = "Metadata";
+    };
+    _create = diskoLib.mkCreateOption {
+      inherit config options;
+      default = { dev }: ''
+        echo "${dev}" >> $disko_devices_dir/zfs_${config.pool}
+      '';
+    };
+    _mount = diskoLib.mkMountOption {
+      inherit config options;
+      default = { dev }:
+        { };
+    };
+    _config = lib.mkOption {
+      internal = true;
+      readOnly = true;
+      default = dev: [ ];
+      description = "NixOS configuration";
+    };
+    _pkgs = lib.mkOption {
+      internal = true;
+      readOnly = true;
+      type = lib.types.functionTo (lib.types.listOf lib.types.package);
+      default = pkgs: [ pkgs.zfs ];
+      description = "Packages";
+    };
+  };
+}