make nosave standalone CVar flag, alongside server and user

src/console/c_cvars.cpp

@@ -191,15 +191,8 @@ void FBaseCVar::SetGenericRep (UCVarValue value, ECVarType type)
 			Flags &= ~CVAR_UNSAFECONTEXT;
 			return;
 		}
-		if (Flags & CVAR_NOSAVEGAME)
-		{
-			ForceSet (value, type);
-		}
-		else
-		{
 		D_SendServerInfoChange (this, value, type);
 	}
-	}
 	else
 	{
 		ForceSet (value, type);
@@ -1259,7 +1252,7 @@ FString C_GetMassCVarString (uint32_t filter, bool compact)
 	{
 		for (cvar = CVars; cvar != NULL; cvar = cvar->m_Next)
 		{
-			if ((cvar->Flags & filter) && !(cvar->Flags & (CVAR_NOSAVE|CVAR_IGNORE|CVAR_NOSAVEGAME)))
+			if ((cvar->Flags & filter) && !(cvar->Flags & (CVAR_NOSAVE|CVAR_IGNORE)))
 			{
 				UCVarValue val = cvar->GetGenericRep(CVAR_String);
 				dump << '\\' << cvar->GetName() << '\\' << val.String;
@@ -1280,7 +1273,7 @@ void C_SerializeCVars(FSerializer &arc, const char *label, uint32_t filter)
 		{
 			for (cvar = CVars; cvar != NULL; cvar = cvar->m_Next)
 			{
-				if ((cvar->Flags & filter) && !(cvar->Flags & (CVAR_NOSAVE | CVAR_IGNORE | CVAR_NOSAVEGAME)))
+				if ((cvar->Flags & filter) && !(cvar->Flags & (CVAR_NOSAVE | CVAR_IGNORE | CVAR_CONFIG_ONLY)))
 				{
 					UCVarValue val = cvar->GetGenericRep(CVAR_String);
 					char* c = const_cast<char*>(val.String);
@@ -1292,7 +1285,7 @@ void C_SerializeCVars(FSerializer &arc, const char *label, uint32_t filter)
 		{
 			for (cvar = CVars; cvar != NULL; cvar = cvar->m_Next)
 			{
-				if ((cvar->Flags & filter) && !(cvar->Flags & (CVAR_NOSAVE | CVAR_IGNORE | CVAR_NOSAVEGAME)))
+				if ((cvar->Flags & filter) && !(cvar->Flags & (CVAR_NOSAVE | CVAR_IGNORE | CVAR_CONFIG_ONLY)))
 				{
 					UCVarValue val;
 					char *c = nullptr;
@@ -1600,7 +1593,7 @@ void C_ArchiveCVars (FConfigFile *f, uint32_t filter)
 	while (cvar)
 	{
 		if ((cvar->Flags &
-			(CVAR_GLOBALCONFIG|CVAR_ARCHIVE|CVAR_MOD|CVAR_AUTO|CVAR_USERINFO|CVAR_SERVERINFO|CVAR_NOSAVE))
+			(CVAR_GLOBALCONFIG|CVAR_ARCHIVE|CVAR_MOD|CVAR_AUTO|CVAR_USERINFO|CVAR_SERVERINFO|CVAR_NOSAVE|CVAR_CONFIG_ONLY))
 			== filter)
 		{
 			cvarlist.Push(cvar);

src/console/c_cvars.h

@@ -48,26 +48,29 @@ CVARS (console variables)
 
 enum
 {
-	CVAR_ARCHIVE		= 1,	// set to cause it to be saved to config
+	CVAR_ARCHIVE       = 1,       // set to cause it to be saved to config.
-	CVAR_USERINFO		= 2,	// added to userinfo  when changed
+	CVAR_USERINFO      = 1 <<  1, // added to userinfo  when changed.
-	CVAR_SERVERINFO		= 4,	// added to serverinfo when changed
+	CVAR_SERVERINFO    = 1 <<  2, // added to serverinfo when changed.
-	CVAR_NOSET			= 8,	// don't allow change from console at all,
+	CVAR_NOSET         = 1 <<  3, // don't allow change from console at all,
-								// but can be set from the command line
+	                              // but can be set from the command line.
-	CVAR_LATCH			= 16,	// save changes until server restart
+	CVAR_LATCH         = 1 <<  4, // save changes until server restart.
-	CVAR_UNSETTABLE		= 32,	// can unset this var from console
+	CVAR_UNSETTABLE    = 1 <<  5, // can unset this var from console.
-	CVAR_DEMOSAVE		= 64,	// save the value of this cvar in a demo
+	CVAR_DEMOSAVE      = 1 <<  6, // save the value of this cvar in a demo.
-	CVAR_ISDEFAULT		= 128,	// is cvar unchanged since creation?
+	CVAR_ISDEFAULT     = 1 <<  7, // is cvar unchanged since creation?
-	CVAR_AUTO			= 256,	// allocated; needs to be freed when destroyed
+	CVAR_AUTO          = 1 <<  8, // allocated; needs to be freed when destroyed.
-	CVAR_NOINITCALL		= 512,	// don't call callback at game start
+	CVAR_NOINITCALL    = 1 <<  9, // don't call callback at game start.
-	CVAR_GLOBALCONFIG	= 1024,	// cvar is saved to global config section
+	CVAR_GLOBALCONFIG  = 1 << 10, // cvar is saved to global config section.
-	CVAR_VIDEOCONFIG	= 2048, // cvar is saved to video config section (not implemented)
+	CVAR_VIDEOCONFIG   = 1 << 11, // cvar is saved to video config section (not implemented).
-	CVAR_NOSAVE			= 4096, // when used with CVAR_SERVERINFO, do not save var to savegame and config.
+	CVAR_NOSAVE        = 1 << 12, // when used with CVAR_SERVERINFO, do not save var to savegame
-	CVAR_MOD			= 8192,	// cvar was defined by a mod
+	                              // and config.
-	CVAR_IGNORE			= 16384,// do not send cvar across the network/inaccesible from ACS (dummy mod cvar)
+	CVAR_MOD           = 1 << 13, // cvar was defined by a mod.
-	CVAR_CHEAT			= 32768,// can be set only when sv_cheats is enabled
+	CVAR_IGNORE        = 1 << 14, // do not send cvar across the network/inaccesible from ACS
-	CVAR_UNSAFECONTEXT	= 65536,// cvar value came from unsafe context
+	                              // (dummy mod cvar).
-	CVAR_VIRTUAL		= 0x20000,	// do not invoke the callback recursively so it can be used to mirror an external variable.
+	CVAR_CHEAT         = 1 << 15, // can be set only when sv_cheats is enabled.
-	CVAR_NOSAVEGAME		= 0x40000,	// do not save var to savegame.
+	CVAR_UNSAFECONTEXT = 1 << 16, // cvar value came from unsafe context.
+	CVAR_VIRTUAL       = 1 << 17, // do not invoke the callback recursively so it can be used to
+	                              // mirror an external variable.
+	CVAR_CONFIG_ONLY   = 1 << 18, // do not save var to savegame and do not send it across network.
 };
 
 union UCVarValue

src/d_main.cpp

@@ -1479,7 +1479,7 @@ void ParseCVarInfo()
 				}
 				else if (stricmp(sc.String, "nosave") == 0)
 				{
-					cvarflags |= CVAR_NOSAVEGAME;
+					cvarflags |= CVAR_CONFIG_ONLY;
 				}
 				else
 				{
@@ -1487,11 +1487,22 @@ void ParseCVarInfo()
 				}
 				sc.MustGetAnyToken();
 			}
+
+			// Possibility of defining a cvar as 'server nosave' or 'user nosave' is kept for
+			// compatibility reasons.
+			if (cvarflags & CVAR_CONFIG_ONLY)
+			{
+				cvarflags &= ~CVAR_SERVERINFO;
+				cvarflags &= ~CVAR_USERINFO;
+			}
+
 			// Do some sanity checks.
-			if ((cvarflags & (CVAR_SERVERINFO|CVAR_USERINFO)) == 0 ||
+			// No need to check server-nosave and user-nosave combinations because they
+			// are made impossible right above.
+			if ((cvarflags & (CVAR_SERVERINFO|CVAR_USERINFO|CVAR_CONFIG_ONLY)) == 0 ||
 				(cvarflags & (CVAR_SERVERINFO|CVAR_USERINFO)) == (CVAR_SERVERINFO|CVAR_USERINFO))
 			{
-				sc.ScriptError("One of 'server' or 'user' must be specified");
+				sc.ScriptError("One of 'server', 'user', or 'nosave' must be specified");
 			}
 			// The next token must be the cvar type.
 			if (sc.TokenType == TK_Bool)

src/gameconfigfile.cpp

@@ -756,6 +756,11 @@ void FGameConfigFile::ArchiveGameData (const char *gamename)
 		}
 	}
 
+	strncpy (subsection, "ConfigOnlyVariables", sublen);
+	SetSection (section, true);
+	ClearCurrentSection ();
+	C_ArchiveCVars (this, CVAR_ARCHIVE|CVAR_AUTO|CVAR_MOD|CVAR_CONFIG_ONLY);
+
 	strncpy (subsection, "UnknownConsoleVariables", sublen);
 	SetSection (section, true);
 	ClearCurrentSection ();