Make lluau::source_path() report top-level script path.

source_path() previously reported the path of the module containing the
current (lowest-level) Lua function. The effect was that the Floater.lua
module would always try to look up the XUI file relative to
scripts/lua/require.

It makes more intuitive sense to make source_path() return the path containing
the top-level script, so that a script engaging the Floater.lua module looks
for the XUI file relative to the script.

1 files changed, 4 insertions, 1 deletions

diff --git a/indra/llcommon/lua_function.cpp b/indra/llcommon/lua_function.cpp
index cd1a0cd562..3e3934c9c1 100644
--- a/indra/llcommon/lua_function.cpp
+++ b/indra/llcommon/lua_function.cpp
@@ -75,8 +75,11 @@ fsyspath lluau::source_path(lua_State* L)
 {
     //Luau lua_Debug and lua_getinfo() are different compared to default Lua:
     //see https://github.com/luau-lang/luau/blob/80928acb92d1e4b6db16bada6d21b1fb6fa66265/VM/include/lua.h
+    // In particular:
+    // passing level=1 gets you info about the deepest function call
+    // passing level=lua_stackdepth() gets you info about the topmost script
     lua_Debug ar;
-    lua_getinfo(L, 1, "s", &ar);
+    lua_getinfo(L, lua_stackdepth(L), "s", &ar);
     return ar.source;
 }