lua: add withPackages function (#54460)

* lua: add withPackages function

First step towards more automation similar to the haskell backend.
Follow up of https://github.com/NixOS/nixpkgs/pull/33903

pkgs/development/lua-modules/default.nix

@@ -0,0 +1,17 @@
+# inspired by pkgs/development/haskell-modules/default.nix
+{ pkgs, stdenv, lib
+, lua
+, overrides ? (self: super: {})
+}:
+
+let
+
+  inherit (lib) extends makeExtensible;
+
+  initialPackages = (pkgs.callPackage ../../top-level/lua-packages.nix {
+    inherit lua;
+  });
+
+  extensible-self = makeExtensible initialPackages;
+in
+  extensible-self

pkgs/development/lua-modules/generic/default.nix

@@ -1,11 +1,11 @@
-{ lua, writeText }:
+{ lua, writeText, toLuaModule }:
 
 { buildInputs ? [], disabled ? false, ... } @ attrs:
 
 if disabled then
   throw "${attrs.name} not supported by interpreter lua-${lua.luaversion}"
 else
-  lua.stdenv.mkDerivation (
+  toLuaModule( lua.stdenv.mkDerivation (
     {
       makeFlags = [
         "PREFIX=$(out)"
@@ -51,4 +51,4 @@ else
         addEnvHooks "$hostOffset" addLuaLibCPath
       '';
     }
-  )
+  ) )