Working on web, change python to lua

cmake/FetchDependencies.cmake

@@ -48,5 +48,8 @@ check_and_download("https://download.savannah.gnu.org/releases/freetype/freetype
 # 8) SDL_ttf
 check_and_download("https://github.com/libsdl-org/SDL_ttf/archive/refs/tags/release-2.24.0.zip" "release-2.24.0.zip" "SDL_ttf-release-2.24.0" "CMakeLists.txt")
 
-# 9) pybind11
-check_and_download("https://github.com/pybind/pybind11/archive/refs/tags/v3.0.3.zip" "pybind11-v3.0.3.zip" "pybind11-3.0.3" "CMakeLists.txt")
+# 9) Lua
+check_and_download("https://github.com/lua/lua/archive/refs/tags/v5.4.8.zip" "lua-v5.4.8.zip" "lua-5.4.8" "lapi.c")
+
+# 10) sol2 (header-only C++ bindings for Lua)
+check_and_download("https://github.com/ThePhD/sol2/archive/refs/tags/v3.3.0.zip" "sol2-v3.3.0.zip" "sol2-3.3.0" "include/sol/sol.hpp")

cmake/ThirdParty.cmake

@@ -8,6 +8,11 @@ endmacro()
 
 set(BUILD_CONFIGS Debug Release)
 
+# Map MinSizeRel and RelWithDebInfo to Release libs for all imported targets.
+# Without this CMake warns that IMPORTED_LOCATION is missing for those configs.
+set(CMAKE_MAP_IMPORTED_CONFIG_MINSIZEREL Release)
+set(CMAKE_MAP_IMPORTED_CONFIG_RELWITHDEBINFO Release)
+
 
 # ===========================================
 # 1) ZLIB (zlib131.zip → zlib-1.3.2) - без изменений
@@ -549,12 +554,57 @@ if(NOT TARGET boost_external_lib)
 endif()
 
 # ===========================================
-# 9) pybind11 (3.0.3) - Python embedding
+# 9) Lua (5.5.0) - embedded scripting language
 # ===========================================
-set(PYBIND11_SRC_DIR "${THIRDPARTY_DIR}/pybind11-3.0.3")
+set(LUA_SRC_DIR "${THIRDPARTY_DIR}/lua-5.4.8")
 
-if(NOT TARGET pybind11::headers)
-    # pybind11 is header-only; add_subdirectory gives us pybind11::embed which
-    # also locates and links the Python interpreter and development libraries.
-    add_subdirectory("${PYBIND11_SRC_DIR}" "${CMAKE_BINARY_DIR}/pybind11_build" EXCLUDE_FROM_ALL)
+if(NOT TARGET lua_static)
+    file(GLOB LUA_SOURCES "${LUA_SRC_DIR}/*.c")
+    # Exclude the standalone interpreter, compiler, and unity-build wrapper.
+    # onelua.c #includes all other .c files — compiling it alongside them
+    # causes every symbol to be defined twice.
+    list(REMOVE_ITEM LUA_SOURCES
+        "${LUA_SRC_DIR}/lua.c"
+        "${LUA_SRC_DIR}/luac.c"
+        "${LUA_SRC_DIR}/onelua.c"
+    )
+
+    add_library(lua_static STATIC ${LUA_SOURCES})
+    target_include_directories(lua_static PUBLIC "${LUA_SRC_DIR}")
+    target_compile_definitions(lua_static PRIVATE _CRT_SECURE_NO_WARNINGS)
+endif()
+
+# ===========================================
+# 10) sol2 (3.3.0) - header-only C++ bindings for Lua
+# ===========================================
+set(SOL2_SRC_DIR "${THIRDPARTY_DIR}/sol2-3.3.0")
+
+# Apply patch for Clang/Emscripten compatibility in optional<T&>::emplace().
+# The sentinel file prevents re-applying on subsequent cmake runs.
+set(_sol2_sentinel "${SOL2_SRC_DIR}/.patched")
+if(NOT EXISTS "${_sol2_sentinel}")
+    find_package(Git QUIET)
+    if(GIT_FOUND)
+        execute_process(
+            COMMAND ${GIT_EXECUTABLE} apply --ignore-whitespace
+                "${CMAKE_CURRENT_LIST_DIR}/patches/sol2-3.3.0-clang-optional.patch"
+            WORKING_DIRECTORY "${SOL2_SRC_DIR}"
+            RESULT_VARIABLE _sol2_patch_res
+        )
+        if(_sol2_patch_res EQUAL 0)
+            file(WRITE "${_sol2_sentinel}" "patched\n")
+            message(STATUS "Applied sol2 Clang optional patch")
+        else()
+            message(WARNING "sol2 patch failed (exit ${_sol2_patch_res}) — Clang/Emscripten builds may not compile")
+        endif()
+    else()
+        message(WARNING "Git not found — cannot apply sol2 patch automatically. "
+                        "Apply cmake/patches/sol2-3.3.0-clang-optional.patch manually.")
+    endif()
+endif()
+
+if(NOT TARGET sol2_external_lib)
+    add_library(sol2_external_lib INTERFACE)
+    target_include_directories(sol2_external_lib INTERFACE "${SOL2_SRC_DIR}/include")
+    target_link_libraries(sol2_external_lib INTERFACE lua_static)
 endif()

cmake/patches/sol2-3.3.0-clang-optional.patch

@@ -0,0 +1,14 @@
+--- a/include/sol/optional_implementation.hpp
++++ b/include/sol/optional_implementation.hpp
+@@ -2189,7 +2189,10 @@
+ 		template <class... Args>
+ 		T& emplace(Args&&... args) noexcept {
+ 			static_assert(std::is_constructible<T, Args&&...>::value, "T must be constructible with Args");
+
+ 			*this = nullopt;
+-			this->construct(std::forward<Args>(args)...);
++			// Reference specialization stores a pointer; set it directly.
++			// construct() only exists in the non-reference specialization.
++			m_value = std::addressof(std::forward<Args>(args)...);
++			return *m_value;
+ 		}