Add command line parameters to make Cemu more useful for running tests (#1959)

src/Cafe/CafeSystem.cpp

@@ -685,6 +685,22 @@ namespace CafeSystem
         fsc_unmount("/cemuBossStorage/", FSC_PRIORITY_BASE);
     }
 
+	void MountExtras()
+	{
+		for (const auto& [host_path, emulatedPath] : LaunchSettings::CosMounts())
+		{
+			FSCDeviceHostFS_Mount(boost::nowide::narrow(emulatedPath), _pathToUtf8(host_path), FSC_PRIORITY_BASE);
+		}
+	}
+
+	void UnmountExtras()
+	{
+		for (const auto& [_, emulatedPath] : LaunchSettings::CosMounts())
+		{
+			fsc_unmount(boost::nowide::narrow(emulatedPath), FSC_PRIORITY_BASE);
+		}
+	}
+
 	PREPARE_STATUS_CODE LoadAndMountForegroundTitle(TitleId titleId)
 	{
         cemuLog_log(LogType::Force, "Mounting title {:016x}", (uint64)titleId);
@@ -838,6 +854,7 @@ namespace CafeSystem
 		if (r != PREPARE_STATUS_CODE::SUCCESS)
 			return r;
 		InitVirtualMlcStorage();
+		MountExtras();
 		return PREPARE_STATUS_CODE::SUCCESS;
 	}
 
@@ -881,6 +898,7 @@ namespace CafeSystem
         // load executable
         PrepareExecutable();
 		InitVirtualMlcStorage();
+		MountExtras();
 		return PREPARE_STATUS_CODE::SUCCESS;
 	}
 
@@ -960,6 +978,9 @@ namespace CafeSystem
 
 	std::string GetForegroundTitleArgStr()
 	{
+		auto optional_arguments = LaunchSettings::CosArgstr();
+		if (optional_arguments.has_value())
+			return *optional_arguments;
 		if (sLaunchModeIsStandalone)
 			return "";
 		auto& update = sGameInfo_ForegroundTitle.GetUpdate();
@@ -1059,9 +1080,11 @@ namespace CafeSystem
 		PPCRecompiler_Shutdown();
 		GraphicPack2::Reset();
 		UnmountCurrentTitle();
+		UnmountExtras();
 		MlcStorageUnmountAllTitles();
 		UnmountBaseDirectories();
 		DestroyMemorySpace();
+		LaunchSettings::ClearCosArgstr();
 		sSystemRunning = false;
 	}
 

src/Cafe/OS/libs/coreinit/coreinit_Misc.cpp

@@ -4,6 +4,7 @@
 #include "Cafe/OS/libs/coreinit/coreinit_OSScreen.h"
 #include "Cafe/CafeSystem.h"
 #include "Cafe/Filesystem/fsc.h"
+#include "config/LaunchSettings.h"
 #include <pugixml.hpp>
 
 namespace coreinit
@@ -544,6 +545,7 @@ namespace coreinit
 	}
 
 	std::mutex sCafeConsoleMutex;
+	bool s_forwardConsoleLogs;
 	
 	void WriteCafeConsole(CafeLogType cafeLogType, const char* msg, sint32 len)
 	{
@@ -556,6 +558,13 @@ namespace coreinit
 			cafeLogBuffer.lineLength = 0;
 		};
 
+		if (s_forwardConsoleLogs) {
+			if (cafeLogType == CafeLogType::OSCONSOLE) {
+				fwrite(msg, 1, len, stdout);
+			} else {
+				fwrite(msg, 1, len, stderr);
+			}
+		}
 		while (len)
 		{
 			char c = *msg;
@@ -846,6 +855,7 @@ namespace coreinit
 	{
 		s_currentTitleId = CafeSystem::GetForegroundTitleId();
 		s_sdkVersion = CafeSystem::GetForegroundTitleSDKVersion();
+		s_forwardConsoleLogs = LaunchSettings::ForwardConsoleLogging();
 		s_transitionToBackground = false;
 		s_transitionToForeground = false;
 

src/config/LaunchSettings.cpp

@@ -71,6 +71,10 @@ bool LaunchSettings::HandleCommandline(const std::vector<std::wstring>& args)
 
 		("account,a", po::value<std::string>(), "Persistent id of account")
 
+		("cos-mounts", po::wvalue<std::vector<std::wstring>>()->composing(), "A series of mounts in the form of: (path on host:path within emulated system, e.g. `/tmp:/vol/temporary/`)")
+		("forward-console-logging", "Forward OSReport, OSConsoleWrite, etc. to stdout/stderr.")
+		("cos-argstr", po::value<std::string>(), "A custom argstr used to override to the arguments to the first RPX that is launched, will be unset after the first launch.")
+
 		("force-interpreter", po::value<bool>()->implicit_value(true), "Force interpreter CPU emulation, disables recompiler. Useful for debugging purposes where you want to get accurate memory accesses and stack traces.")
 		("force-multicore-interpreter", po::value<bool>()->implicit_value(true), "Force multi-core interpreter CPU emulation, disables recompiler. Only useful for getting stack traces, but slightly faster than the single-core interpreter mode.")
 		("enable-gdbstub", po::value<bool>()->implicit_value(true), "Enable GDB stub to debug executables inside Cemu using an external debugger");
@@ -189,6 +193,30 @@ bool LaunchSettings::HandleCommandline(const std::vector<std::wstring>& args)
 		if (vm.count("enable-gdbstub"))
 			s_enable_gdbstub = vm["enable-gdbstub"].as<bool>();
 
+		if (vm.count("forward-console-logging"))
+		{
+			requireConsole();
+			s_forward_console_logging = true;
+		}
+
+		if (vm.count("cos-argstr"))
+			s_cos_argstr = vm["cos-argstr"].as<std::string>();
+
+		if (vm.count("cos-mounts"))
+		{
+			for (const auto& argument : vm["cos-mounts"].as<std::vector<std::wstring>>())
+			{
+				size_t colon_location = argument.find(L':');
+				if (colon_location == std::wstring::npos)
+				{
+					std::cerr << "Argument for a mount expects to be in the format: `path on host:path in emulated system`, was not: `" << boost::nowide::narrow(argument) << "`\n";
+					continue;
+				}
+
+				s_cos_mounts[argument.substr(0, colon_location)] = argument.substr(colon_location + 1);
+			}
+		}
+
 		std::wstring extract_path, log_path;
 		std::string output_path;
 		if (vm.count("extract"))

src/config/LaunchSettings.h

@@ -2,6 +2,7 @@
 
 #include <optional>
 #include <string>
+#include <unordered_map>
 
 class LaunchSettings
 {
@@ -24,6 +25,11 @@ public:
 
 	static bool Verbose() { return s_verbose; }
 
+	static bool ForwardConsoleLogging() { return s_forward_console_logging; }
+	static std::optional<std::string> CosArgstr() { return s_cos_argstr; }
+	static void ClearCosArgstr() { s_cos_argstr.reset(); }
+	static std::unordered_map<fs::path, std::wstring>& CosMounts() { return s_cos_mounts; }
+
 	static bool GDBStubEnabled() { return s_enable_gdbstub; }
 	static bool NSightModeEnabled() { return s_nsight_mode; }
 
@@ -45,6 +51,10 @@ private:
 
 	inline static bool s_verbose = false;
 
+	inline static bool s_forward_console_logging = false;
+	inline static std::optional<std::string> s_cos_argstr{};
+	inline static std::unordered_map<fs::path, std::wstring> s_cos_mounts{};
+
 	inline static bool s_enable_gdbstub = false;
 	inline static bool s_nsight_mode = false;
 
@@ -59,5 +69,3 @@ private:
 
 	static bool ExtractorTool(std::wstring_view wud_path, std::string_view output_path, std::wstring_view log_path);
 };
-
-