some error handling stuff

src/script/cpp_api/s_sscsm.cpp

@@ -17,8 +17,7 @@ void ScriptApiSSCSM::load_mods(const std::vector<std::string> &init_paths)
 		actionstream << "    " << p << ":\n";
 		auto f = env->readVFSFile(p);
 		if (!f.has_value()) {
-			env->setFatalError("load_mods(): File doesn't exist: " + p);
-			return;
+			throw ModError("load_mods(): File doesn't exist: " + p);
 		}
 		actionstream << *f << "\n";
 	}
@@ -33,9 +32,5 @@ void ScriptApiSSCSM::environment_step(float dtime)
 	lua_getfield(L, -1, "registered_globalsteps");
 	// Call callbacks
 	lua_pushnumber(L, dtime);
-	try {
-		runCallbacks(1, RUN_CALLBACKS_MODE_FIRST);
-	} catch (LuaError &e) {
-		getSSCSMEnv()->setFatalError(e);
-	}
+	runCallbacks(1, RUN_CALLBACKS_MODE_FIRST);
 }

src/script/lua_api/l_sscsm.cpp

@@ -13,7 +13,7 @@
 #include "mapnode.h"
 
 // print(text)
-int ModApiSSCSM::l_print(lua_State *L)
+int ModApiSSCSM::l_print(lua_State *L) //TODO: not core.print
 {
 	auto request = SSCSMRequestPrint{};
 	request.text = luaL_checkstring(L, 1);
@@ -22,6 +22,37 @@ int ModApiSSCSM::l_print(lua_State *L)
 	return 0;
 }
 
+// log([level], text)
+int ModApiSSCSM::l_log(lua_State *L)
+{
+	/*
+	auto request = SSCSMRequestLog{};
+	request.text = luaL_checkstring(L, 1);
+	getSSCSMEnv(L)->doRequest(std::move(request));
+
+	std::string_view text;
+	LogLevel level = LL_NONE;
+	if (lua_isnoneornil(L, 2)) {
+		text = readParam<std::string_view>(L, 1);
+	} else {
+		auto name = readParam<std::string_view>(L, 1);
+		text = readParam<std::string_view>(L, 2);
+		// if (name == "deprecated") { //TODO
+			// log_deprecated(L, text, 2);
+			// return 0;
+		// }
+		level = Logger::stringToLevel(name);
+		if (level == LL_MAX) {
+			warningstream << "Tried to log at unknown level '" << name
+				<< "'. Defaulting to \"none\"." << std::endl;
+			level = LL_WARNING;
+		}
+	}
+	g_logger.log(level, text);
+	*/
+	return 0;
+}
+
 // get_node_or_nil(pos)
 // pos = {x=num, y=num, z=num}
 int ModApiSSCSM::l_get_node_or_nil(lua_State *L)
@@ -46,5 +77,6 @@ int ModApiSSCSM::l_get_node_or_nil(lua_State *L)
 void ModApiSSCSM::Initialize(lua_State *L, int top)
 {
 	API_FCT(print);
+	API_FCT(log);
 	API_FCT(get_node_or_nil);
 }

src/script/lua_api/l_sscsm.h

@@ -12,6 +12,9 @@ private:
 	// print(text)
 	static int l_print(lua_State *L);
 
+	// log([level], text)
+	static int l_log(lua_State *L);
+
 	// get_node_or_nil(pos)
 	static int l_get_node_or_nil(lua_State *L);
 

src/script/scripting_sscsm.cpp

@@ -8,7 +8,7 @@
 // #include "lua_api/l_util.h"
 
 SSCSMScripting::SSCSMScripting(SSCSMEnvironment *env) :
-	ScriptApiBase(ScriptingType::SSCSM)
+	ScriptApiBase(ScriptingType::SSCSM) //TODO: use different CUSTOM_RIDX_ERROR_HANDLER, or set debug.traceback
 {
 	setSSCSMEnv(env);
 

src/script/sscsm/sscsm_environment.cpp

@@ -24,7 +24,13 @@ void *SSCSMEnvironment::run()
 			break;
 		}
 
-		next_event->exec(this);
+		try {
+			next_event->exec(this);
+		} catch (LuaError &e) {
+			setFatalError(std::string("Lua error: ") + e.what());
+		} catch (ModError &e) {
+			setFatalError(std::string("Mod error: ") + e.what());
+		}
 	}
 
 	return nullptr;

src/script/sscsm/sscsm_environment.h

@@ -40,10 +40,6 @@ public:
 	std::optional<std::string_view> readVFSFile(const std::string &path);
 
 	void setFatalError(const std::string &reason);
-	void setFatalError(const LuaError &e)
-	{
-		setFatalError(std::string("Lua: ") + e.what());
-	}
 
 	template <typename RQ>
 	typename RQ::Answer doRequest(RQ &&rq)

src/script/sscsm/sscsm_requests.h

@@ -60,6 +60,7 @@ struct SSCSMRequestPrint : public ISSCSMRequest
 };
 
 // core.log(level, text)
+// FIXME: override global loggers to use this in sscsm process
 struct SSCSMRequestLog : public ISSCSMRequest
 {
 	struct Answer : public ISSCSMAnswer