Build self-contained macOS client and verify native beta path

extension/src/platform/ScriptLib/PythonBoot.cpp

@@ -49,6 +49,7 @@
 
 #include <condition_variable>
 #include <cstdlib>
+#include <filesystem>
 #include <memory>
 #include <mutex>
 #include <pthread.h>
@@ -346,8 +347,18 @@ bool Start(const char* stdlib_path, std::string* error)
 		return true;
 
 	// 40250 Main (UserInterface.cpp:410): if (LocaleService_LoadGlobal(hInstance)) SetDefaultCodePage(...).
-	LocaleService_LoadConfig("locale.cfg");
+	std::string locale_config = "locale.cfg";
+	if (const char* client = std::getenv("MT_40250_CLIENT"))
+		locale_config = (std::filesystem::path(client) / "locale.cfg").string();
+	LocaleService_LoadConfig(locale_config.c_str());
 	SetDefaultCodePage(LocaleService_GetCodePage());
+	if (const char* data_dir = std::getenv("MT_40250_USER_DATA_DIR"))
+	{
+		std::error_code ec;
+		std::filesystem::current_path(data_dir, ec);
+		if (ec)
+			return fail(error, "cannot use player settings directory: " + ec.message());
+	}
 
 	const std::string stdlib = (stdlib_path && *stdlib_path) ? stdlib_path : PythonHost::DefaultStdLibPath();
 	if (stdlib.empty())

extension/src/port/UserInterface/PythonBackground.cpp

@@ -252,7 +252,12 @@ void CPythonBackground::__CreateProperty()
 	}
 	else
 	{
-		m_PropertyManager.Initialize("pack/property");
+		// The exported client runs with player settings as CWD; its read-only property pack
+		// lives beside the other bundled 40250 packs. Use the same root registered by PackBackend.
+		std::string property_pack = "pack/property";
+		if (const char* client = getenv("MT_40250_CLIENT"))
+			property_pack = std::string(client) + "/pack/Property";
+		m_PropertyManager.Initialize(property_pack.c_str());
 	}
 }
 

extension/src/python_stdlib.cpp

@@ -7,6 +7,7 @@
 #include <godot_cpp/variant/utility_functions.hpp>
 
 #include <string>
+#include <cstdio>
 
 #ifdef MTGODOT_HAVE_PYTHON
 #include "platform/ScriptLib/PythonHost.h"
@@ -60,8 +61,13 @@ String stage_python_stdlib(String *error, bool force_stage) {
 	// nothing is copied. In an exported game globalize_path() returns a path next to the executable
 	// that does not exist, which is exactly the case the staging below is for.
 	const String in_place = settings->globalize_path(ZIP_RES);
-	if (!force_stage && !in_place.begins_with("res://") && FileAccess::file_exists(in_place)) {
-		return in_place;
+	if (!force_stage && !in_place.begins_with("res://")) {
+		// FileAccess may resolve an exported PCK entry through a relative globalized path. CPython
+		// uses fopen(), so only return the path when libc can open a real on-disk zip there.
+		if (FILE *file = std::fopen(in_place.utf8().get_data(), "rb")) {
+			std::fclose(file);
+			return in_place;
+		}
 	}
 
 	const String want = expected_sha();