From 32a629f2a3d78d892f8b36982240dd294adf846b Mon Sep 17 00:00:00 2001
From: black-sliver <59490463+black-sliver@users.noreply.github.com>
Date: Thu, 9 Jan 2025 22:54:01 +0100
Subject: [PATCH] Lua: make require return true for modules with no return

this fixes the require cache not working
---
 src/luasandbox/require.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/luasandbox/require.h b/src/luasandbox/require.h
index c17a4d6b..d7ddc1f8 100644
--- a/src/luasandbox/require.h
+++ b/src/luasandbox/require.h
@@ -61,6 +61,11 @@ static inline int luasandbox_require(lua_State *L)
     if (luaL_loadbufferx(L, pscript.c_str(), pscript.length(), filename.c_str(), "t") == LUA_OK) {
         lua_pushstring(L, name);
         if (lua_pcall(L, 1, 1, 0) == LUA_OK) {
+            if (lua_isnil(L, -1)) {
+                // if module returned nil, we return (and cache) true instead
+                lua_pop(L, 1);
+                lua_pushboolean(L, 1);
+            }
             lua_pushvalue(L, -1); // duplicate result
             lua_setfield(L, -3, name);
             lua_remove(L, -2); // remove _LOADED from stack