create helpers.toLuaObject

plugins/helpers.nix

@@ -1,6 +1,30 @@
 { lib, ... }:
-{
+with lib;
+rec {
   # vim dictionaries are, in theory, compatible with JSON
-  toVimDict = args: builtins.toJSON 
+  toVimDict = args: toJSON 
-    (lib.filterAttrs (n: v: !builtins.isNull v) args);
+    (lib.filterAttrs (n: v: !isNull v) args);
+
+  # Black functional magic that converts a bunch of different Nix types to their
+  # lua equivalents!
+  toLuaObject = args:
+    if builtins.isAttrs args then
+      "{" + (concatStringsSep ","
+        (mapAttrsToList
+          (n: v: "[${toLuaObject n}] = " + (toLuaObject v))
+        args)) + "}"
+    else if builtins.isList args then
+      "{" + concatMapStringsSep "," toLuaObject args + "}"
+    else if builtins.isString args then
+      # This should be enough!
+      escapeShellArg args
+    else if builtins.isBool args then
+      "${ boolToString args }"
+    else if builtins.isFloat args then
+      "${ toString args }"
+    else if builtins.isInt args then
+      "${ toString args }"
+    else if isNull args then
+      "nil"
+    else "";
 }