From 1750db9a7d4a3988c182a78f7cc62397792dc06a Mon Sep 17 00:00:00 2001
From: lujinwangnv <143145775+lujinwangnv@users.noreply.github.com>
Date: Mon, 19 May 2025 21:38:53 -0700
Subject: Update build to allow setting external lua path (#7167)

* Update build to allow setting external lua path

Update the build to allow setting user-specific path for the external
module lua.

* T

* Fix an include path
---
 CMakeLists.txt                          |  5 +++++
 tools/CMakeLists.txt                    | 18 +++++++++++++++++-
 tools/slang-fiddle/slang-fiddle-lua.cpp |  2 +-
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a933d0ab6..98eb4d9c3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -223,6 +223,11 @@ advanced_option(
     "Build using user defined path for tinyobjloader"
     OFF
 )
+advanced_option(
+    SLANG_OVERRIDE_LUA_PATH
+    "Build using user defined path for lua"
+    OFF
+)
 
 advanced_option(
     SLANG_EXCLUDE_DAWN
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index d871f91f2..aad87e21d 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -45,7 +45,23 @@ function(generator dir)
     endif()
 endfunction()
 
-generator(slang-fiddle LINK_WITH_PRIVATE compiler-core)
+if(NOT SLANG_OVERRIDE_LUA_PATH)
+    generator(
+        slang-fiddle
+        LINK_WITH_PRIVATE
+        compiler-core
+        INCLUDE_DIRECTORIES_PUBLIC
+        ${slang_SOURCE_DIR}/external/lua
+    )
+else()
+    generator(
+        slang-fiddle
+        LINK_WITH_PRIVATE
+        compiler-core
+        INCLUDE_DIRECTORIES_PUBLIC
+        ${SLANG_OVERRIDE_LUA_PATH}
+    )
+endif()
 generator(slang-embed)
 generator(slang-generate USE_FEWER_WARNINGS)
 generator(slang-lookup-generator LINK_WITH_PRIVATE compiler-core)
diff --git a/tools/slang-fiddle/slang-fiddle-lua.cpp b/tools/slang-fiddle/slang-fiddle-lua.cpp
index f6ba36357..0d5f04eca 100644
--- a/tools/slang-fiddle/slang-fiddle-lua.cpp
+++ b/tools/slang-fiddle/slang-fiddle-lua.cpp
@@ -2,4 +2,4 @@
 
 
 #define MAKE_LIB 1
-#include "../external/lua/onelua.c"
+#include "onelua.c"
-- 
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