Merge pull request #3556 from Sonicadvance1/move_app_config

FEXCore: Fixes priority of FEX_APP_CONFIG

FEXCore/Source/Interface/Config/Config.cpp

@@ -130,7 +130,7 @@ namespace DefaultValues {
   static fextl::map<FEXCore::Config::LayerType, fextl::unique_ptr<FEXCore::Config::Layer>> ConfigLayers;
   static FEXCore::Config::Layer *Meta{};
 
-  constexpr std::array<FEXCore::Config::LayerType, 9> LoadOrder = {
+  constexpr std::array<FEXCore::Config::LayerType, 10> LoadOrder = {
     FEXCore::Config::LayerType::LAYER_GLOBAL_MAIN,
     FEXCore::Config::LayerType::LAYER_MAIN,
     FEXCore::Config::LayerType::LAYER_GLOBAL_STEAM_APP,
@@ -138,6 +138,7 @@ namespace DefaultValues {
     FEXCore::Config::LayerType::LAYER_LOCAL_STEAM_APP,
     FEXCore::Config::LayerType::LAYER_LOCAL_APP,
     FEXCore::Config::LayerType::LAYER_ARGUMENTS,
+    FEXCore::Config::LayerType::LAYER_USER_OVERRIDE,
     FEXCore::Config::LayerType::LAYER_ENVIRONMENT,
     FEXCore::Config::LayerType::LAYER_TOP
   };

FEXCore/include/FEXCore/Config/Config.h

@@ -81,6 +81,7 @@ namespace Handler {
     LAYER_GLOBAL_APP,
     LAYER_LOCAL_STEAM_APP,
     LAYER_LOCAL_APP,
+    LAYER_USER_OVERRIDE,
     LAYER_ENVIRONMENT,
     LAYER_TOP,
   };

Source/Common/Config.cpp

@@ -129,6 +129,8 @@ namespace JSON {
   public:
     explicit MainLoader(FEXCore::Config::LayerType Type);
     explicit MainLoader(fextl::string ConfigFile);
+    explicit MainLoader(FEXCore::Config::LayerType Type, const char* ConfigFile);
+
     void Load() override;
 
   private:
@@ -188,6 +190,12 @@ namespace JSON {
     , Config{std::move(ConfigFile)} {
   }
 
+
+  MainLoader::MainLoader(FEXCore::Config::LayerType Type, const char* ConfigFile)
+    : OptionMapper(Type)
+    , Config{ConfigFile} {
+  }
+
   void MainLoader::Load() {
     JSON::LoadJSonConfig(Config, [this](const char *Name, const char *ConfigString) {
       MapNameToOption(Name, ConfigString);
@@ -276,6 +284,10 @@ namespace JSON {
     }
   }
 
+  fextl::unique_ptr<FEXCore::Config::Layer> CreateUserOverrideLayer(const char* AppConfig) {
+    return fextl::make_unique<MainLoader>(FEXCore::Config::LayerType::LAYER_USER_OVERRIDE, AppConfig);
+  }
+
   fextl::unique_ptr<FEXCore::Config::Layer> CreateAppLayer(const fextl::string& Filename, FEXCore::Config::LayerType Type) {
     return fextl::make_unique<AppLoader>(Filename, Type);
   }
@@ -371,6 +383,11 @@ namespace JSON {
       FEXCore::Config::AddLayer(fextl::make_unique<FEX::ArgLoader::ArgLoader>(argc, argv));
     }
 
+    const char *AppConfig = getenv("FEX_APP_CONFIG");
+    if (AppConfig && FHU::Filesystem::Exists(AppConfig)) {
+      FEXCore::Config::AddLayer(CreateUserOverrideLayer(AppConfig));
+    }
+
     FEXCore::Config::AddLayer(CreateEnvironmentLayer(envp));
     FEXCore::Config::Load();
 
@@ -529,21 +546,7 @@ namespace JSON {
   }
 
   fextl::string GetConfigFileLocation(bool Global) {
-    fextl::string ConfigFile{};
-    if (Global) {
-      ConfigFile = GetConfigDirectory(true) + "Config.json";
-    }
-    else {
-      const char *AppConfig = getenv("FEX_APP_CONFIG");
-      if (AppConfig) {
-        // App config environment variable overwrites only the config file
-        ConfigFile = AppConfig;
-      }
-      else {
-        ConfigFile = GetConfigDirectory(false) + "Config.json";
-      }
-    }
-    return ConfigFile;
+    return GetConfigDirectory(Global) + "Config.json";
   }
 
   void InitializeConfigs() {

Source/Common/Config.h

@@ -73,6 +73,7 @@ namespace FEX::Config {
    * @return unique_ptr for that layer
    */
   fextl::unique_ptr<FEXCore::Config::Layer> CreateMainLayer(fextl::string const *File = nullptr);
+  fextl::unique_ptr<FEXCore::Config::Layer> CreateUserOverrideLayer(const char* AppConfig);
 
   /**
    * @brief Create an application configuration loader

Source/Tools/LinuxEmulation/LinuxSyscalls/FileManagement.cpp

@@ -219,6 +219,7 @@ FileManager::FileManager(FEXCore::Context::Context *ctx)
   // - AppConfig Global
   // - Steam AppConfig Local
   // - AppConfig Local
+  // - AppConfig override
   // This doesn't support the classic thunks interface.
 
   auto AppName = AppConfigName();
@@ -245,6 +246,11 @@ FileManager::FileManager(FEXCore::Context::Context *ctx)
     ConfigPaths.emplace_back(FEXCore::Config::GetApplicationConfig(AppName, false));
   }
 
+  const char *AppConfig = getenv("FEX_APP_CONFIG");
+  if (AppConfig) {
+    ConfigPaths.emplace_back(AppConfig);
+  }
+
   if (!LDPath().empty()) {
     RootFSFD = open(LDPath().c_str(), O_DIRECTORY | O_PATH | O_CLOEXEC);
     if (RootFSFD == -1) {