Refactor some of the startup code.

src/SystemData.cpp

@@ -182,14 +182,21 @@ std::string SystemData::getDescName()
 }
 
 //creates systems from information located in a config file
-void SystemData::loadConfig()
+bool SystemData::loadConfig(const std::string& path, bool writeExample)
 {
 	deleteSystems();
 
-	std::string path = getConfigPath();
-
 	LOG(LogInfo) << "Loading system config file...";
 
+	if(!fs::exists(path))
+	{
+		LOG(LogInfo) << "System config file \"" << path << "\" doesn't exist!";
+		if(writeExample)
+			writeExampleConfig(path);
+
+		return false;
+	}
+
 	std::ifstream file(path.c_str());
 	if(file.is_open())
 	{
@@ -262,21 +269,21 @@ void SystemData::loadConfig()
 				}
 			}else{
 				LOG(LogError) << "Error reading config file \"" << path << "\" - no equals sign found on line " << lineNr << ": \"" << line << "\"!";
-				return;
+				return false;
 			}
 		}
 	}else{
 		LOG(LogError) << "Error - could not load config file \"" << path << "\"!";
-		return;
+		return false;
 	}
 
 	LOG(LogInfo) << "Finished loading config file - created " << sSystemVector.size() << " systems.";
-	return;
+	return true;
 }
 
-void SystemData::writeExampleConfig()
+void SystemData::writeExampleConfig(const std::string& path)
 {
-	std::string path = getConfigPath();
+	std::cerr << "Writing example config to \"" << path << "\"...";
 
 	std::ofstream file(path.c_str());
 
@@ -303,6 +310,8 @@ void SystemData::writeExampleConfig()
 	file << "COMMAND=" << std::endl;
 
 	file.close();
+
+	std::cerr << "done. Go read it!\n";
 }
 
 void SystemData::deleteSystems()

src/SystemData.h

@@ -25,8 +25,8 @@ public:
 	void launchGame(Window* window, GameData* game);
 
 	static void deleteSystems();
-	static void loadConfig();
-	static void writeExampleConfig();
+	static bool loadConfig(const std::string& path, bool writeExampleIfNonexistant = true); //Load the system config file at getConfigPath(). Returns true if no errors were encountered. An example can be written if the file doesn't exist.
+	static void writeExampleConfig(const std::string& path);
 	static std::string getConfigPath();
 
 	static std::vector<SystemData*> sSystemVector;

src/Window.cpp

@@ -3,18 +3,20 @@
 #include "Renderer.h"
 #include "AudioManager.h"
 #include "VolumeControl.h"
+#include "Log.h"
+#include "Settings.h"
 
 Window::Window()
 {
 	mInputManager = new InputManager(this);
-
-	mDefaultFonts.push_back(Font::get(mResourceManager, Font::getDefaultPath(), FONT_SIZE_SMALL));
-	mDefaultFonts.push_back(Font::get(mResourceManager, Font::getDefaultPath(), FONT_SIZE_MEDIUM));
-	mDefaultFonts.push_back(Font::get(mResourceManager, Font::getDefaultPath(), FONT_SIZE_LARGE));
 }
 
 Window::~Window()
 {
+	//delete all our GUIs
+	while(peekGui())
+		delete peekGui();
+	
 	delete mInputManager;
 }
 
@@ -55,25 +57,31 @@ void Window::render()
 	}
 }
 
-void Window::init()
+bool Window::init(unsigned int width, unsigned int height)
 {
-	mInputManager->init(); //shouldn't this go AFTER renderer initialization?
-	Renderer::init(0, 0);
+	if(!Renderer::init(width, height))
+	{
+		LOG(LogError) << "Renderer failed to initialize!";
+		return false;
+	}
+
+	mInputManager->init();
+
 	mResourceManager.reloadAll();
 
-	for(unsigned int i = 0; i < mGuiStack.size(); i++)
+	//keep a reference to the default fonts, so they don't keep getting destroyed/recreated
+	if(mDefaultFonts.empty())
 	{
-		mGuiStack.at(i)->init();
+		mDefaultFonts.push_back(Font::get(mResourceManager, Font::getDefaultPath(), FONT_SIZE_SMALL));
+		mDefaultFonts.push_back(Font::get(mResourceManager, Font::getDefaultPath(), FONT_SIZE_MEDIUM));
+		mDefaultFonts.push_back(Font::get(mResourceManager, Font::getDefaultPath(), FONT_SIZE_LARGE));
 	}
+
+	return true;
 }
 
 void Window::deinit()
 {
-	for(unsigned int i = 0; i < mGuiStack.size(); i++)
-	{
-		mGuiStack.at(i)->deinit();
-	}
-
 	mInputManager->deinit();
 	mResourceManager.unloadAll();
 	Renderer::deinit();

src/Window.h

@@ -21,7 +21,7 @@ public:
 	void update(int deltaTime);
 	void render();
 
-	void init();
+	bool init(unsigned int width = 0, unsigned int height = 0);
 	void deinit();
 
 	InputManager* getInputManager();

src/components/GuiMenu.cpp

@@ -52,7 +52,7 @@ void GuiMenu::executeCommand(std::string command)
 	}else if(command == "es_reload")
 	{
 		//reload the game list
-		SystemData::loadConfig();
+		SystemData::loadConfig(SystemData::getConfigPath(), false);
 		mParent->setSystemId(0);
 	}else if(command == "es_settings")
 	{

src/main.cpp

@@ -20,26 +20,23 @@
 	#include <bcm_host.h>
 #endif
 
-
 #include <sstream>
 
 namespace fs = boost::filesystem;
 
-int main(int argc, char* argv[])
+bool parseArgs(int argc, char* argv[], unsigned int* width, unsigned int* height)
 {
-	unsigned int width = 0;
-	unsigned int height = 0;
 	if(argc > 1)
 	{
 		for(int i = 1; i < argc; i++)
 		{
 			if(strcmp(argv[i], "-w") == 0)
 			{
-				width = atoi(argv[i + 1]);
+				*width = atoi(argv[i + 1]);
 				i++; //skip the argument value
 			}else if(strcmp(argv[i], "-h") == 0)
 			{
-				height = atoi(argv[i + 1]);
+				*height = atoi(argv[i + 1]);
 				i++; //skip the argument value
 			}else if(strcmp(argv[i], "--gamelist-only") == 0)
 			{
@@ -83,17 +80,16 @@ int main(int argc, char* argv[])
 
 				std::cout << "--help				summon a sentient, angry tuba\n\n";
 				std::cout << "More information available in README.md.\n";
-				return 0;
+				return false; //exit after printing help
 			}
 		}
 	}
 
-	#ifdef _RPI_
-		bcm_host_init();
-	#endif
-
-	bool running = true;
+	return true;
+}
 
+bool verifyHomeFolderExists()
+{
 	//make sure the config directory exists
 	std::string home = getHomePath();
 	std::string configDir = home + "/.emulationstation";
@@ -101,55 +97,83 @@ int main(int argc, char* argv[])
 	{
 		std::cout << "Creating config directory \"" << configDir << "\"\n";
 		fs::create_directory(configDir);
+		if(!fs::exists(configDir))
+		{
+			std::cerr << "Config directory could not be created!\n";
+			return false;
 		}
+	}
+
+	return true;
+}
+
+//called on exit, assuming we get far enough to have the log initialized
+void onExit()
+{
+	Log::close();
+
+	#ifdef _RPI_
+		bcm_host_deinit();
+	#endif
+}
+
+int main(int argc, char* argv[])
+{
+	unsigned int width = 0;
+	unsigned int height = 0;
+
+	if(!parseArgs(argc, argv, &width, &height))
+		return 0;
+
+	//if ~/.emulationstation doesn't exist and cannot be created, bail
+	if(!verifyHomeFolderExists())
+		return 1;
+
+	#ifdef _RPI_
+		bcm_host_init();
+	#endif
 
 	//start the logger
 	Log::open();
 	LOG(LogInfo) << "EmulationStation - " << PROGRAM_VERSION_STRING;
 
-	//the renderer also takes care of setting up SDL for input and sound
-	bool renderInit = Renderer::init(width, height);
-	if(!renderInit)
+	//always close the log and deinit the BCM library on exit
+	atexit(&onExit);
+
+	Window window;
+	if(!window.init(width, height))
 	{
-		std::cerr << "Error initializing renderer!\n";
-		Log::close();
+		LOG(LogError) << "Window failed to initialize!";
 		return 1;
 	}
 
-	Window window; //don't call Window.init() because we manually pass the resolution to Renderer::init
-	window.getInputManager()->init();
-
 	//try loading the system config file
-	if(!fs::exists(SystemData::getConfigPath())) //if it doesn't exist, create the example and quit
+	if(!SystemData::loadConfig(SystemData::getConfigPath(), true))
 	{
-		std::cerr << "A system config file in " << SystemData::getConfigPath() << " was not found. An example will be created.\n";
-		SystemData::writeExampleConfig();
-		std::cerr << "Set it up, then re-run EmulationStation.\n";
-		running = false;
-	}else{
-		SystemData::loadConfig();
+		LOG(LogError) << "Error parsing system config file!";
+		return 1;
+	}
 
-		if(SystemData::sSystemVector.size() == 0) //if it exists but was empty, notify the user and quit
+	//make sure it wasn't empty
+	if(SystemData::sSystemVector.size() == 0)
 	{
-			std::cerr << "A system config file in " << SystemData::getConfigPath() << " was found, but contained no systems.\n";
-			std::cerr << "Does at least one system have a game present?\n";
-			running = false;
-		}else{
-			//choose which GUI to open depending on Input configuration
+		LOG(LogError) << "No systems found! Does at least one system have a game present? (check that extensions match!)";
+		return 1;
+	}
+
+	//choose which GUI to open depending on if an input configuration already exists
 	if(fs::exists(InputManager::getConfigPath()))
 	{
-				//an input config already exists - we have input, proceed to the gamelist as usual.
 		GuiGameList::create(&window);
 	}else{
 		window.pushGui(new GuiDetectDevice(&window));
 	}
-		}
-	}
 
 	bool sleeping = false;
 	unsigned int timeSinceLastEvent = 0;
-
 	int lastTime = 0;
+	bool running = true;
+
 	while(running)
 	{
 		SDL_Event event;
@@ -234,11 +258,5 @@ int main(int argc, char* argv[])
 
 	std::cout << "EmulationStation cleanly shutting down...\n";
 
-	Log::close();
-
-	#ifdef _RPI_
-		bcm_host_deinit();
-	#endif
-
 	return 0;
 }