Enable command line argument to produce an archive checksum to the headless/normal engines

rts/Game/PreGame.cpp

@@ -323,6 +323,8 @@ void CPreGame::StartServer(const std::string& setupscript)
 		sha512::dump_digest(mapChecksum, mapChecksumHex);
 		sha512::dump_digest(modChecksum, modChecksumHex);
 
+		archiveScanner->WriteCache(); // write the cache, useful in case the game loading crashes afterwards
+
 		LOG("[PreGame::%s]\n\tmod-checksum=%s\n\tmap-checksum=%s", __func__, modChecksumHex.data(), mapChecksumHex.data());
 		LOG("[PreGame::%s] Game/Map archives checksum acquisition took = %ld microseconds", __func__, (spring_gettime() - connectTimer).toMilliSecsi());
 

rts/Game/UI/InfoConsole.cpp

@@ -30,7 +30,6 @@ void CInfoConsole::InitStatic() {
 
 void CInfoConsole::KillStatic() {
 	RECOIL_DETAILED_TRACY_ZONE;
-	assert(infoConsole != nullptr);
 	spring::SafeDestruct(infoConsole);
 	std::fill(std::begin(infoConsoleMem), std::end(infoConsoleMem), std::byte{0});
 }

rts/Rendering/Textures/Bitmap.cpp

@@ -1074,7 +1074,7 @@ CBitmap& CBitmap::operator=(CBitmap&& bmp) noexcept
 bool CBitmap::CanBeKilled()
 {
 	RECOIL_DETAILED_TRACY_ZONE;
-	return ITexMemPool::texMemPool->NoCurrentAllocations();
+	return !ITexMemPool::texMemPool || ITexMemPool::texMemPool->NoCurrentAllocations();
 }
 
 void CBitmap::InitPool(size_t size)

rts/System/FileSystem/FileSystemInitializer.cpp

@@ -62,7 +62,14 @@ bool FileSystemInitializer::Initialize()
 		return true;
 
 	SetupThreadReg();
+	InitializeTry();
+	ClearThreadReg();
 
+	return (initSuccess && !initFailure);
+}
+
+void FileSystemInitializer::InitializeTry()
+{
 	try {
 		Platform::SetOrigCWD();
 
@@ -86,11 +93,6 @@ bool FileSystemInitializer::Initialize()
 
 		ErrorMessageBox("", "Spring: caught generic exception", MBF_OK | MBF_EXCL);
 	}
-
-	// in case of an exception, ErrorMessageBox takes care of this
-	ClearThreadReg();
-
-	return (initSuccess && !initFailure);
 }
 
 void FileSystemInitializer::Cleanup(bool deallocConfigHandler)

rts/System/FileSystem/FileSystemInitializer.h

@@ -12,6 +12,7 @@ class FileSystemInitializer {
 	static void PreInitializeConfigHandler(const std::string& configSource = "", const std::string& configName = "", const bool safemode = false);
 	static void InitializeLogOutput(const std::string& filename = "");
 	static bool Initialize();
+	static void InitializeTry();
 	static void InitializeThr(bool* retPtr) { *retPtr = Initialize(); }
 	static void Cleanup(bool deallocConfigHandler = true);
 	static void Reload();

rts/System/SpringApp.cpp

@@ -144,6 +144,7 @@ DEFINE_string   (map,                                      "",    "Specify the m
 DEFINE_string   (menu,                                     "",    "Specify a lua menu archive to be used by spring");
 DEFINE_string   (name,                                     "",    "Set your player name");
 DEFINE_bool     (oldmenu,                                  false, "Start the old menu");
+DEFINE_string_EX(calc_checksum,      "calc-checksum",      "",    "Calculate named archive checksum and write to cache, cant run in parallel");
 
 /* Startscript sets the listening port number. Replays use the entire startscript, including the port number.
  * So normally if two games were originally played on the same port number, you can't watch their replays in
@@ -544,6 +545,25 @@ void SpringApp::ParseCmdLine(int argc, char* argv[])
 		AILibraryManager::OutputSkirmishAIInfo();
 		exit(spring::EXIT_CODE_SUCCESS);
 	}
+	else if (!FLAGS_calc_checksum.empty()) {
+		ConsolePrintInitialize(FLAGS_config, FLAGS_safemode);
+		try {
+			FileSystemInitializer::InitializeTry();
+			archiveScanner->ResetNumFilesHashed();
+
+			const std::string archive = archiveScanner->ArchiveFromName(FLAGS_calc_checksum);
+			const auto cs = archiveScanner->GetArchiveCompleteChecksumBytes(archive);
+
+			sha512::hex_digest hexCs = { 0 };
+			sha512::dump_digest(cs, hexCs);
+
+			LOG("Archive \"%s\", checksum = \"%s\"", FLAGS_calc_checksum.c_str(), hexCs.data());
+			FileSystemInitializer::Cleanup();
+			exit(spring::EXIT_CODE_SUCCESS);
+		}
+		CATCH_SPRING_ERRORS
+		exit(spring::EXIT_CODE_CRASHED);
+	}
 
 	CTextureAtlas::SetDebug(FLAGS_textureatlas);