[NixOS] Add make-enable to control nixos modules with configuration

nixos/make-enable.nix

@@ -0,0 +1,26 @@
+lib: config: pathStr: default: configAttrs:
+let
+
+  pathToAttrSet = str: value:
+  let
+    parts = lib.splitString "." str;
+  in
+  if lib.length parts == 1 then
+  { ${lib.head parts} = value; }
+  else
+  { ${lib.head parts} = pathToAttrSet (lib.concatStringsSep "." (lib.tail parts)) value; };
+
+  optionsSet = pathToAttrSet pathStr {
+    enable = lib.mkOption {
+      inherit default;
+      type = lib.types.bool;
+    };
+  };
+
+  cfg = lib.attrByPath (lib.splitString "." pathStr) { enable = false; defaulted = true; } config;
+
+in
+{
+  options = optionsSet;
+  config = lib.mkIf cfg.enable configAttrs;
+}