From 4ac02ee44ad0dff50486a3fa207818513b6837f0 Mon Sep 17 00:00:00 2001
From: Emil <65846814+emil28092005@users.noreply.github.com>
Date: Thu, 24 Sep 2026 03:13:27 +0300
Subject: [PATCH] Keep Windows export integration outside engine checkout

---
 .github/workflows/windows-graphics.yml |  8 ++++----
 tests/build_cache_tests.cpp            | 11 +++++++++++
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/windows-graphics.yml b/.github/workflows/windows-graphics.yml
index 05c1381..970135f 100644
--- a/.github/workflows/windows-graphics.yml
+++ b/.github/workflows/windows-graphics.yml
@@ -71,7 +71,7 @@ jobs:
           VK_LOADER_DEBUG: error,warn,driver
         run: ctest --preset windows-debug --timeout 180
       - name: Real Release exports, 2D and 3D execution, incremental Debug rebuild
-        run: build/windows-debug/faset_build_service_tests.exe --integration .cache/windows-export-e2e
+        run: build/windows-debug/faset_build_service_tests.exe --integration "${{ runner.temp }}/faset-windows-export-e2e"
       - name: Export and relocate C++ and Lua playable games
         run: python tools/verify_playable_exports.py --editor build/windows-debug/faset_editor.exe --output .cache/windows-playable-exports --include-lua
       - name: Preserve graphics and export evidence
@@ -89,8 +89,8 @@ jobs:
             .cache/windows-graphics/sdk/source-identity.json
             build/windows-debug/Testing/Temporary/LastTest.log
             build/windows-debug/*test.ppm
-            .cache/windows-export-e2e/result-*.json
-            .cache/windows-export-e2e/export-*/generations/*/manifest.json
-            .cache/windows-export-e2e/export-*/generations/*/verification.ppm
+            ${{ runner.temp }}/faset-windows-export-e2e/result-*.json
+            ${{ runner.temp }}/faset-windows-export-e2e/export-*/generations/*/manifest.json
+            ${{ runner.temp }}/faset-windows-export-e2e/export-*/generations/*/verification.ppm
             .cache/windows-playable-exports/report.json
             .cache/windows-playable-exports/evidence/*
diff --git a/tests/build_cache_tests.cpp b/tests/build_cache_tests.cpp
index ae97bd7..406edb3 100644
--- a/tests/build_cache_tests.cpp
+++ b/tests/build_cache_tests.cpp
@@ -82,6 +82,17 @@ void run(const fs::path& root) {
     }
     check(refused_unowned && fs::is_regular_file(user_directory / "do-not-delete.txt"),
           "Unowned native directory is never cleared");
+    auto engine_nested = config;
+    engine_nested.build_directory = engine_nested.engine_root / ".cache/unsafe-test-native-build";
+    bool refused_engine_overlap{};
+    try {
+        editor::ensure_native_toolchain_stamp(
+            engine_nested, engine_nested.build_directory / "Debug", changed_tool);
+    } catch (const std::exception&) {
+        refused_engine_overlap = true;
+    }
+    check(refused_engine_overlap && !fs::exists(engine_nested.build_directory),
+          "Integration fixture native builds cannot overlap the engine checkout");
     std::error_code native_link_error;
     fs::create_directory_symlink(user_directory, config.build_directory / "Release",
                                  native_link_error);