some reorganizing

lib/default.nix

@@ -0,0 +1,29 @@
+l: let
+  b = builtins;
+in rec {
+  loadBranch = branch:
+    l.mapAttrs' (leaf: _: {
+      name = l.removeSuffix ".nix" leaf;
+      value = /${branch}/${leaf};
+    }) (b.readDir /${branch});
+
+  loadTree2 = dir: (l.mapAttrs (branch: _: loadBranch /${dir}/${branch})) (b.readDir dir);
+
+  loadTreeInf = dir:
+    l.mapAttrs' (
+      name: value: {
+        name = l.removeSuffix ".nix" name;
+        value =
+          if value == "directory"
+          then loadTreeInf (dir + /${name})
+          else (dir + /${name});
+      }
+    ) (b.readDir dir);
+
+  loadConfigurations = dir: specialArgs:
+    (b.mapAttrs (name: _:
+      l.nixosSystem {
+        modules = [(dir + /${name})];
+        inherit specialArgs;
+      })) (b.readDir dir);
+}