lib/helpers: internal refactoring

lib/to-lua.nix

@@ -0,0 +1,46 @@
+{lib}:
+with lib; rec {
+  # Black functional magic that converts a bunch of different Nix types to their
+  # lua equivalents!
+  toLuaObject = args:
+    if builtins.isAttrs args
+    then
+      if hasAttr "__raw" args
+      then args.__raw
+      else if hasAttr "__empty" args
+      then "{ }"
+      else
+        "{"
+        + (concatStringsSep ","
+          (mapAttrsToList
+            (n: v:
+              if (builtins.match "__unkeyed.*" n) != null
+              then toLuaObject v
+              else if n == "__emptyString"
+              then "[''] = " + (toLuaObject v)
+              else "[${toLuaObject n}] = " + (toLuaObject v))
+            (filterAttrs
+              (
+                n: v:
+                  v != null && (toLuaObject v != "{}")
+              )
+              args)))
+        + "}"
+    else if builtins.isList args
+    then "{" + concatMapStringsSep "," toLuaObject args + "}"
+    else if builtins.isString args
+    then
+      # This should be enough!
+      builtins.toJSON args
+    else if builtins.isPath args
+    then builtins.toJSON (toString args)
+    else if builtins.isBool args
+    then "${boolToString args}"
+    else if builtins.isFloat args
+    then "${toString args}"
+    else if builtins.isInt args
+    then "${toString args}"
+    else if (args == null)
+    then "nil"
+    else "";
+}