Added .env patcher.

CMakeLists.txt

@@ -25,6 +25,7 @@ else()
     add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tools/patch_acorn)
     add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tools/parcel_adapter)
     add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tools/patch_emscripten_config)
+    add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tools/patch_dotenv)
     add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tools/inline_parser)
     add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tools/inline_injector)
     add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/tools/webview_uuid)

tools/patch_dotenv/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(patch-dotenv VERSION 0.1.0)
+
+add_executable(patch-dotenv main.cpp)
+target_compile_features(patch-dotenv PRIVATE cxx_std_20)
+
+set_target_properties(patch-dotenv
+    PROPERTIES
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/tools_bin"
+)

tools/patch_dotenv/main.cpp

@@ -0,0 +1,35 @@
+#include <fstream>
+#include <iostream>
+
+int main(int argc, char** argv)
+{
+    if (argc != 4)
+    {
+        std::cout << "Expected 3 arguments: <.env file source> <.env file target> <nui-root-dir>, but got " << argc - 1
+                  << "\n";
+        std::cout << "Usage: " << argv[0] << " <.env file source> <.env file target> <nui-root-dir>" << "\n";
+        return 1;
+    }
+
+    const std::string source = argv[1];
+    const std::string target = argv[2];
+    const std::string nuiRootDir = argv[3];
+
+    std::ofstream ofs{target, std::ios_base::binary};
+    if (!ofs)
+    {
+        std::cout << "Failed to open file: " << target << "\n";
+        return 1;
+    }
+
+    std::ifstream ifs{source, std::ios_base::binary};
+    if (!ifs)
+    {
+        ofs << "NUI_PROJECT_ROOT=" << nuiRootDir << "\n";
+        return 0;
+    }
+
+    ofs << "NUI_PROJECT_ROOT=" << nuiRootDir << "\n";
+    ofs << ifs.rdbuf();
+    return 0;
+}