Mods: Combine mod loading checks and deprection logging (#11503)

This limits the logged deprecation messages to the mods that are loaded
Unifies the mod naming convention check for CSM & SSM

src/client/client.cpp

@@ -177,11 +177,7 @@ void Client::loadMods()
 
 	// Load "mod" scripts
 	for (const ModSpec &mod : m_mods) {
-		if (!string_allowed(mod.name, MODNAME_ALLOWED_CHARS)) {
-			throw ModError("Error loading mod \"" + mod.name +
-				"\": Mod name does not follow naming conventions: "
-					"Only characters [a-z0-9_] are allowed.");
-		}
+		mod.checkAndLog();
 		scanModIntoMemory(mod.name, mod.path);
 	}
 

src/content/mods.cpp

@@ -30,6 +30,29 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "convert_json.h"
 #include "script/common/c_internal.h"
 
+void ModSpec::checkAndLog() const
+{
+	if (!string_allowed(name, MODNAME_ALLOWED_CHARS)) {
+		throw ModError("Error loading mod \"" + name +
+			"\": Mod name does not follow naming conventions: "
+				"Only characters [a-z0-9_] are allowed.");
+	}
+
+	// Log deprecation messages
+	auto handling_mode = get_deprecated_handling_mode();
+	if (!deprecation_msgs.empty() && handling_mode != DeprecatedHandlingMode::Ignore) {
+		std::ostringstream os;
+		os << "Mod " << name << " at " << path << ":" << std::endl;
+		for (auto msg : deprecation_msgs)
+			os << "\t" << msg << std::endl;
+
+		if (handling_mode == DeprecatedHandlingMode::Error)
+			throw ModError(os.str());
+		else
+			warningstream << os.str();
+	}
+}
+
 bool parseDependsString(std::string &dep, std::unordered_set<char> &symbols)
 {
 	dep = trim(dep);
@@ -45,21 +68,6 @@ bool parseDependsString(std::string &dep, std::unordered_set<char> &symbols)
 	return !dep.empty();
 }
 
-static void log_mod_deprecation(const ModSpec &spec, const std::string &warning)
-{
-	auto handling_mode = get_deprecated_handling_mode();
-	if (handling_mode != DeprecatedHandlingMode::Ignore) {
-		std::ostringstream os;
-		os << warning << " (" << spec.name << " at " << spec.path << ")" << std::endl;
-
-		if (handling_mode == DeprecatedHandlingMode::Error) {
-			throw ModError(os.str());
-		} else {
-			warningstream << os.str();
-		}
-	}
-}
-
 void parseModContents(ModSpec &spec)
 {
 	// NOTE: this function works in mutual recursion with getModsInPath
@@ -89,7 +97,7 @@ void parseModContents(ModSpec &spec)
 		if (info.exists("name"))
 			spec.name = info.get("name");
 		else
-			log_mod_deprecation(spec, "Mods not having a mod.conf file with the name is deprecated.");
+			spec.deprecation_msgs.push_back("Mods not having a mod.conf file with the name is deprecated.");
 
 		if (info.exists("author"))
 			spec.author = info.get("author");
@@ -130,7 +138,7 @@ void parseModContents(ModSpec &spec)
 			std::ifstream is((spec.path + DIR_DELIM + "depends.txt").c_str());
 
 			if (is.good())
-				log_mod_deprecation(spec, "depends.txt is deprecated, please use mod.conf instead.");
+				spec.deprecation_msgs.push_back("depends.txt is deprecated, please use mod.conf instead.");
 
 			while (is.good()) {
 				std::string dep;
@@ -153,7 +161,7 @@ void parseModContents(ModSpec &spec)
 		if (info.exists("description"))
 			spec.desc = info.get("description");
 		else if (fs::ReadFile(spec.path + DIR_DELIM + "description.txt", spec.desc))
-			log_mod_deprecation(spec, "description.txt is deprecated, please use mod.conf instead.");
+			spec.deprecation_msgs.push_back("description.txt is deprecated, please use mod.conf instead.");
 	}
 }
 

src/content/mods.h

@@ -49,6 +49,9 @@ struct ModSpec
 	bool part_of_modpack = false;
 	bool is_modpack = false;
 
+	// For logging purposes
+	std::vector<const char *> deprecation_msgs;
+
 	// if modpack:
 	std::map<std::string, ModSpec> modpack_content;
 	ModSpec(const std::string &name = "", const std::string &path = "") :
@@ -59,6 +62,8 @@ struct ModSpec
 			name(name), path(path), part_of_modpack(part_of_modpack)
 	{
 	}
+
+	void checkAndLog() const;
 };
 
 // Retrieves depends, optdepends, is_modpack and modpack_content

src/server/mods.cpp

@@ -61,12 +61,8 @@ void ServerModManager::loadMods(ServerScripting *script)
 	infostream << std::endl;
 	// Load and run "mod" scripts
 	for (const ModSpec &mod : m_sorted_mods) {
-		if (!string_allowed(mod.name, MODNAME_ALLOWED_CHARS)) {
-			throw ModError("Error loading mod \"" + mod.name +
-					"\": Mod name does not follow naming "
-					"conventions: "
-					"Only characters [a-z0-9_] are allowed.");
-		}
+		mod.checkAndLog();
+
 		std::string script_path = mod.path + DIR_DELIM + "init.lua";
 		auto t = porting::getTimeMs();
 		script->loadMod(script_path, mod.name);