Filter out instance logs from slave console

Exclude instance related logs from the slave console as these are not
significant for the running of the slave and just add noise.

packages/lib/logging.js

@@ -32,9 +32,14 @@ class ConsoleTransport extends Transport {
 		super(options);
 		this.errorLevels = new Set(options.errorLevels || ["fatal", "error"]);
 		this.warnLevels = new Set(options.warnLevels || ["warn"]);
+		this.filter = options.filter || (() => true);
 	}
 
 	log(info, callback) {
+		if (!this.filter(info)) {
+			return callback();
+		}
+
 		/* eslint-disable no-console */
 		if (this.errorLevels.has(info[LEVEL])) {
 			console.error(info[MESSAGE]);
@@ -44,7 +49,7 @@ class ConsoleTransport extends Transport {
 			console.log(info[MESSAGE]);
 		}
 		/* eslint-enable no-console */
-		callback();
+		return callback();
 	}
 }
 

packages/slave/slave.js

@@ -27,7 +27,7 @@ const libPluginLoader = require("@clusterio/lib/plugin_loader");
 const libErrors = require("@clusterio/lib/errors");
 const libConfig = require("@clusterio/lib/config");
 const libSharedCommands = require("@clusterio/lib/shared_commands");
-const { ConsoleTransport, levels, logger } = require("@clusterio/lib/logging");
+const { ConsoleTransport, FilteredTransport, levels, logger } = require("@clusterio/lib/logging");
 const libLoggingUtils = require("@clusterio/lib/logging_utils");
 
 const Slave = require("./src/Slave");
@@ -126,6 +126,7 @@ async function startSlave() {
 		logger.add(new ConsoleTransport({
 			level: args.logLevel,
 			format: new libLoggingUtils.TerminalFormat(),
+			filter: info => info.instance_id === undefined,
 		}));
 	}