iOS: Update recents paths on load

Fixes the main part of #19211

Common/File/FileUtil.cpp

@@ -340,6 +340,9 @@ std::string ResolvePath(const std::string &path) {
 	delete [] buf;
 	return output;
 
+#elif PPSSPP_PLATFORM(IOS)
+	// Resolving has wacky effects on documents paths.
+	return path;
 #else
 	std::unique_ptr<char[]> buf(new char[PATH_MAX + 32768]);
 	if (realpath(path.c_str(), buf.get()) == nullptr)
@@ -404,8 +407,8 @@ bool Exists(const Path &path) {
 	SetErrorMode(OldMode);
 #endif
 	return true;
-#else
-	struct stat file_info;
+#else  // !WIN32
+	struct stat file_info{};
 	return stat(path.c_str(), &file_info) == 0;
 #endif
 }

Common/GPU/Vulkan/VulkanLoader.cpp

@@ -381,8 +381,8 @@ void VulkanSetAvailable(bool available) {
 bool VulkanMayBeAvailable() {
 #if PPSSPP_PLATFORM(IOS)
 	g_vulkanAvailabilityChecked = true;
+	// MoltenVK does no longer seem to support iOS <= 12, despite what the docs say.
 	g_vulkanMayBeAvailable = System_GetPropertyInt(SYSPROP_SYSTEMVERSION) >= 13;
-	INFO_LOG(SYSTEM, "VulkanMayBeAvailable: Detected version: %d", (int)System_GetPropertyInt(SYSPROP_SYSTEMVERSION));
 	return g_vulkanMayBeAvailable;
 #else
 	// Unsupported in VR at the moment

Core/Config.cpp

@@ -1367,7 +1367,7 @@ bool Config::Save(const char *saveReason) {
 		playTimeTracker_.Save(playTime);
 
 		if (!iniFile.Save(iniFilename_)) {
-			ERROR_LOG(LOADER, "Error saving config (%s)- can't write ini '%s'", saveReason, iniFilename_.c_str());
+			ERROR_LOG(LOADER, "Error saving config (%s) - can't write ini '%s'", saveReason, iniFilename_.c_str());
 			return false;
 		}
 		INFO_LOG(LOADER, "Config saved (%s): '%s' (%0.1f ms)", saveReason, iniFilename_.c_str(), (time_now_d() - startTime) * 1000.0);
@@ -1546,6 +1546,34 @@ void Config::RemoveRecent(const std::string &file) {
 	recentIsos.erase(iter, recentIsos.end());
 }
 
+// On iOS, the path to the app documents directory changes on each launch.
+// Example path:
+// /var/mobile/Containers/Data/Application/0E0E89DE-8D8E-485A-860C-700D8BC87B86/Documents/PSP/GAME/SuicideBarbie
+// The GUID part changes on each launch.
+bool TryUpdateSavedPath(Path *path) {
+#if PPSSPP_PLATFORM(IOS)
+	INFO_LOG(LOADER, "Original path: %s", path->c_str());
+	std::string pathStr = path->ToString();
+
+	const std::string_view applicationRoot = "/var/mobile/Containers/Data/Application/";
+	if (startsWith(pathStr, applicationRoot)) {
+		size_t documentsPos = pathStr.find("/Documents/");
+		if (documentsPos == std::string::npos) {
+			return false;
+		}
+		std::string memstick = g_Config.memStickDirectory.ToString();
+		size_t memstickDocumentsPos = memstick.find("/Documents");  // Note: No trailing slash, or we won't find it.
+		*path = Path(memstick.substr(0, memstickDocumentsPos) + pathStr.substr(documentsPos));
+		return true;
+	} else {
+		// Path can't be auto-updated.
+		return false;
+	}
+#else
+	return false;
+#endif
+}
+
 void Config::CleanRecent() {
 	private_->SetRecentIsosThread([this] {
 		SetCurrentThreadName("RecentISOs");
@@ -1556,6 +1584,10 @@ void Config::CleanRecent() {
 
 		std::lock_guard<std::mutex> guard(private_->recentIsosLock);
 		std::vector<std::string> cleanedRecent;
+		if (recentIsos.empty()) {
+			INFO_LOG(LOADER, "No recents list found.");
+		}
+
 		for (size_t i = 0; i < recentIsos.size(); i++) {
 			bool exists = false;
 			Path path = Path(recentIsos[i]);
@@ -1563,6 +1595,12 @@ void Config::CleanRecent() {
 			case PathType::CONTENT_URI:
 			case PathType::NATIVE:
 				exists = File::Exists(path);
+				if (!exists) {
+					if (TryUpdateSavedPath(&path)) {
+						exists = File::Exists(path);
+						INFO_LOG(LOADER, "Exists=%d when checking updated path: %s", exists, path.c_str());
+					}
+				}
 				break;
 			default:
 				FileLoader *loader = ConstructFileLoader(path);
@@ -1572,11 +1610,14 @@ void Config::CleanRecent() {
 			}
 
 			if (exists) {
+				std::string pathStr = path.ToString();
 				// Make sure we don't have any redundant items.
-				auto duplicate = std::find(cleanedRecent.begin(), cleanedRecent.end(), recentIsos[i]);
+				auto duplicate = std::find(cleanedRecent.begin(), cleanedRecent.end(), pathStr);
 				if (duplicate == cleanedRecent.end()) {
-					cleanedRecent.push_back(recentIsos[i]);
+					cleanedRecent.push_back(pathStr);
 				}
+			} else {
+				DEBUG_LOG(LOADER, "Removed %s from recent. errno=%d", path.c_str(), errno);
 			}
 		}
 

ios/ViewController.mm

@@ -292,6 +292,8 @@ void GLRenderLoop(IOSGLESContext *graphicsContext) {
 {
 	INFO_LOG(SYSTEM, "shutdown GL");
 
+	g_Config.Save("shutdown GL");
+
 	_dbg_assert_(graphicsContext);
 	_dbg_assert_(sharedViewController != nil);
 	sharedViewController = nil;

ios/ViewControllerMetal.mm

@@ -353,6 +353,8 @@ void VulkanRenderLoop(IOSVulkanContext *graphicsContext, CAMetalLayer *metalLaye
 {
 	INFO_LOG(SYSTEM, "shutdown VK");
 
+	g_Config.Save("shutdown vk");
+
 	_dbg_assert_(sharedViewController != nil);
 	sharedViewController = nil;