ensure the userdata is initialized before trying to use the preferences

src/filesystem.cpp

@@ -694,7 +694,7 @@ static bfs::path windows_userdata(const std::string& newprefdir)
 			DBG_FS << "using default userdata folder name";
 		} else {
 			temp = "Wesnoth" + get_version_path_suffix();
-			ERR_FS << "relative path for userdata that doesn't start with '.' or '..' is not allowed, using default userdata folder name";
+			DBG_FS << "relative path for userdata that doesn't start with '.' or '..' is not allowed, using default userdata folder name";
 		}
 
 		PWSTR docs_path = nullptr;
@@ -759,8 +759,9 @@ static bfs::path apple_userdata(const std::string& newprefdir)
 		dir = temp;
 		DBG_FS << "userdata using absolute path";
 	} else {
-		dir = "." / temp;
-		ERR_FS << "unable to determine location to use for userdata, defaulting to current working directory";
+		dir = ".";
+		dir / temp;
+		DBG_FS << "unable to determine location to use for userdata, defaulting to current working directory";
 	}
 
 	return dir;
@@ -816,7 +817,7 @@ static bfs::path linux_userdata(const std::string& newprefdir)
 
 	// unable to determine another userdata directory, so just use the current working directory for the userdata
 	dir = ".";
-	ERR_FS << "unable to determine location to use for userdata, defaulting to current working directory";
+	DBG_FS << "unable to determine location to use for userdata, defaulting to current working directory";
 
 	dir /= temp;
 	return dir;

src/game_launcher.cpp

@@ -188,7 +188,7 @@ game_launcher::game_launcher(const commandline_options& cmdline_opts)
 	}
 	if(cmdline_opts_.nogui || cmdline_opts_.headless_unit_test) {
 		no_sound = true;
-		prefs::get().disable_preferences_save();
+		prefs::disable_preferences_save();
 	}
 	if(cmdline_opts_.new_widgets)
 		gui2::new_widgets = true;
@@ -211,7 +211,7 @@ game_launcher::game_launcher(const commandline_options& cmdline_opts)
 		screenshot_map_ = *cmdline_opts_.screenshot_map_file;
 		screenshot_filename_ = *cmdline_opts_.screenshot_output_file;
 		no_sound = true;
-		prefs::get().disable_preferences_save();
+		prefs::disable_preferences_save();
 	}
 	if (cmdline_opts_.server){
 		jump_to_multiplayer_ = true;
@@ -227,10 +227,10 @@ game_launcher::game_launcher(const commandline_options& cmdline_opts)
 			}
 		}
 		if(cmdline_opts_.username) {
-			prefs::get().disable_preferences_save();
+			prefs::disable_preferences_save();
 			prefs::get().set_login(*cmdline_opts_.username);
 			if(cmdline_opts_.password) {
-				prefs::get().disable_preferences_save();
+				prefs::disable_preferences_save();
 				prefs::get().set_password(*cmdline_opts.server, *cmdline_opts.username, *cmdline_opts_.password);
 			}
 		}

src/preferences/preferences.cpp

@@ -69,7 +69,6 @@ static lg::log_domain advanced_preferences("advanced_preferences");
 
 prefs::prefs()
 : preferences_()
-, no_preferences_save_(false)
 , fps_(false)
 , completed_campaigns_()
 , encountered_units_set_()
@@ -441,10 +440,6 @@ config::attribute_value prefs::get_as_attribute(const std::string &key)
 //
 // accessors
 //
-void prefs::disable_preferences_save() {
-	no_preferences_save_ = true;
-}
-
 bool prefs::show_ally_orb() {
 	return preferences_[prefs_list::show_ally_orb].to_bool(game_config::show_ally_orb);
 }

src/preferences/preferences.hpp

@@ -206,7 +206,7 @@ class prefs
 			// for boost: the userdata folders don't get initialized and the preferences aren't used for anything, so skip the check here
 			// TODO: figure out how to make this not fail for all the other tests too
 			static bool called_before_init = !(filesystem::base_name(filesystem::get_exe_path()).find("boost") == std::string::npos && !filesystem::is_userdata_initialized());
-			assert(called_before_init);
+			assert(called_before_init && "Attempt to use preferences before userdata initialization");
 
 			static prefs prefs_manager;
 			return prefs_manager;
@@ -220,8 +220,6 @@ class prefs
 		void reload_preferences();
 		std::set<std::string> all_attributes();
 
-		void disable_preferences_save();
-
 		std::string core_id();
 		void set_core_id(const std::string& root);
 
@@ -742,6 +740,14 @@ class prefs
 
 		std::vector<preferences::option>& get_advanced_preferences() {return advanced_prefs_;}
 
+		static void disable_preferences_save() {
+			no_preferences_save_ = true;
+		}
+
+		static bool preferences_save() {
+			return no_preferences_save_;
+		}
+
 	private:
 		prefs();
 		// don't move, assign, or copy a singleton
@@ -750,8 +756,9 @@ class prefs
 		prefs(const prefs&& p) = delete;
 		prefs& operator=(const prefs&& p) = delete;
 
+		inline static bool no_preferences_save_ = false;
+
 		config preferences_;
-		bool no_preferences_save_;
 		bool fps_;
 		std::map<std::string, std::set<std::string>> completed_campaigns_;
 		std::set<std::string> encountered_units_set_;

src/wesnoth.cpp

@@ -309,6 +309,10 @@ static int process_command_args(const commandline_options& cmdline_opts)
 		return 0;
 	}
 
+	// earliest possible point to ensure the userdata directory is known
+	// if you're hitting the assertion in the preferences about the userdata not being initialized, it means you're trying to use the preferences before wesnoth knows where the preferences are
+	filesystem::get_user_data_dir();
+
 	if(cmdline_opts.data_dir) {
 		const std::string datadir = *cmdline_opts.data_dir;
 		PLAIN_LOG << "Starting with directory: '" << datadir << "'";