add doctrine

doctrine/lib/mk-module.nix

@@ -0,0 +1,38 @@
+{
+  name,
+  hm ? null,
+  sys ? null,
+  options ? null,
+  lib,
+  config,
+  pkgs,
+  doctrine,
+}: let
+  optionsSet = import options {
+    inherit config lib pkgs cfg name doctrine;
+  };
+
+  configSet = import configFiles.${doctrine.namespace} {
+    inherit config lib pkgs doctrine cfg;
+  };
+
+  configFiles = lib.filterAttrs (k: v: v != null) {
+    inherit sys hm;
+  };
+
+  cfg = config.${doctrine.prefix}.${name};
+in {
+  config =
+    lib.optionalAttrs (configFiles ? ${doctrine.namespace})
+    (lib.mkIf cfg.enable configSet);
+
+  options = lib.optionalAttrs (options
+    != null
+    && optionsSet ? ${doctrine.namespace}) {
+    ${doctrine.prefix}.${name} =
+      optionsSet.${doctrine.namespace}
+      // {
+        enable = lib.mkEnableOption name;
+      };
+  };
+}