wip: create dbzfs module

default.nix

@@ -2,6 +2,7 @@
 
 {
   imports = [
+    ./modules/dragn-ball-zfs
     ./modules/ghidra-server
   ];
 

modules/dragn-ball-zfs/default.nix

@@ -0,0 +1,36 @@
+{ config, lib, pkgs, ... }:
+with lib;
+let
+  cfg = config.dbzfs;
+in {
+  options.dbzfs = {
+    enable = mkEnableOption "dbzfs" // {
+      default = true;
+    };
+    package = mkPackageOption pkgs "zfs" {};
+    managedRoot = mkOption {
+      default = null;
+      example = literalExpression "\"rpool/data\"";
+      description = mdDoc "Root dataset which is managed by dbzfs.";
+      type = types.str;
+    };
+
+    datasets = mkOption {
+      default = [];
+      example = literalExpression "TODO";
+      description = mdDoc "List of datasets to set up with dbzfs";
+      type = types.listOf types.anything; # todo
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions = [{
+      assertion = cfg.managedRoot != null;
+      message = "dbzfs is enabled but dbzfs.managedRoot is not defined!";
+    }];
+
+    system.activationScripts.dbzfs = ''
+      echo meow
+    '';
+  };
+}