[iOS] Read document and cache path directly in the OS code, instead of passing in from main.

platform/ios/app_delegate.mm

@@ -45,7 +45,7 @@
 extern int gargc;
 extern char **gargv;
 
-extern int ios_main(int, char **, String, String);
+extern int ios_main(int, char **);
 extern void ios_finish();
 
 @implementation AppDelegate
@@ -66,12 +66,7 @@ static ViewController *mainViewController = nil;
 	// Create a full-screen window
 	self.window = [[UIWindow alloc] initWithFrame:windowBounds];
 
-	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
-	NSString *documentsDirectory = [paths objectAtIndex:0];
-	paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
-	NSString *cacheDirectory = [paths objectAtIndex:0];
-
-	int err = ios_main(gargc, gargv, String::utf8([documentsDirectory UTF8String]), String::utf8([cacheDirectory UTF8String]));
+	int err = ios_main(gargc, gargv);
 
 	if (err != 0) {
 		// bail, things did not go very well for us, should probably output a message on screen with our error code...

platform/ios/godot_ios.mm

@@ -38,10 +38,6 @@
 
 static OS_IOS *os = nullptr;
 
-int add_path(int, char **);
-int add_cmdline(int, char **);
-int ios_main(int, char **, String);
-
 int add_path(int p_argc, char **p_args) {
 	NSString *str = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"godot_path"];
 	if (!str) {
@@ -74,7 +70,7 @@ int add_cmdline(int p_argc, char **p_args) {
 	return p_argc;
 }
 
-int ios_main(int argc, char **argv, String data_dir, String cache_dir) {
+int ios_main(int argc, char **argv) {
 	size_t len = strlen(argv[0]);
 
 	while (len--) {
@@ -95,7 +91,7 @@ int ios_main(int argc, char **argv, String data_dir, String cache_dir) {
 	char cwd[512];
 	getcwd(cwd, sizeof(cwd));
 	printf("cwd %s\n", cwd);
-	os = new OS_IOS(data_dir, cache_dir);
+	os = new OS_IOS();
 
 	// We must override main when testing is enabled
 	TEST_MAIN_OVERRIDE

platform/ios/os_ios.h

@@ -71,9 +71,6 @@ private:
 
 	virtual void finalize() override;
 
-	String user_data_dir;
-	String cache_dir;
-
 	bool is_focused = false;
 
 	void deinitialize_modules();
@@ -81,7 +78,7 @@ private:
 public:
 	static OS_IOS *get_singleton();
 
-	OS_IOS(String p_data_dir, String p_cache_dir);
+	OS_IOS();
 	~OS_IOS();
 
 	void initialize_modules();

platform/ios/os_ios.mm

@@ -90,7 +90,7 @@ OS_IOS *OS_IOS::get_singleton() {
 	return (OS_IOS *)OS::get_singleton();
 }
 
-OS_IOS::OS_IOS(String p_data_dir, String p_cache_dir) {
+OS_IOS::OS_IOS() {
 	for (int i = 0; i < ios_init_callbacks_count; ++i) {
 		ios_init_callbacks[i]();
 	}
@@ -101,11 +101,6 @@ OS_IOS::OS_IOS(String p_data_dir, String p_cache_dir) {
 
 	main_loop = nullptr;
 
-	// can't call set_data_dir from here, since it requires DirAccess
-	// which is initialized in initialize_core
-	user_data_dir = p_data_dir;
-	cache_dir = p_cache_dir;
-
 	Vector<Logger *> loggers;
 	loggers.push_back(memnew(SyslogLogger));
 #ifdef DEBUG_ENABLED
@@ -272,20 +267,25 @@ Error OS_IOS::shell_open(String p_uri) {
 }
 
 String OS_IOS::get_user_data_dir() const {
-	static bool user_data_dir_set = false;
-	if (user_data_dir_set) {
-		String old_dir = user_data_dir;
-		Ref<DirAccess> da = DirAccess::open(old_dir);
-		const_cast<OS_IOS *>(this)->user_data_dir = da->get_current_dir();
-		user_data_dir_set = true;
-
-		printf("setting data dir to %s from %s\n", user_data_dir.utf8().get_data(), old_dir.utf8().get_data());
+	static String ret;
+	if (ret.is_empty()) {
+		NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
+		if (paths && [paths count] >= 1) {
+			ret.parse_utf8([[paths firstObject] UTF8String]);
+		}
 	}
-	return user_data_dir;
+	return ret;
 }
 
 String OS_IOS::get_cache_path() const {
-	return cache_dir;
+	static String ret;
+	if (ret.is_empty()) {
+		NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
+		if (paths && [paths count] >= 1) {
+			ret.parse_utf8([[paths firstObject] UTF8String]);
+		}
+	}
+	return ret;
 }
 
 String OS_IOS::get_locale() const {