adds validation warning to config. exit with error when supplied no f…

…iles to watch

config_manager.go

@@ -35,6 +35,16 @@ type ConfigFile struct {
 	ExcludePatterns *RegexCollection `yaml:"exclude_patterns"`
 }
 
+func (cf ConfigFile) printValidationWarnings() {
+	if len(cf.Files) == 0 {
+		log.Warningf("Configuration file contains no files to watch")
+	}
+	// Warn, that port is not set, only if host is specified
+	if cf.Destination.Host != "" && cf.Destination.Port == 0 {
+		log.Warningf("Destination port is not specified in configuration file")
+	}
+}
+
 type ConfigManager struct {
 	Config    ConfigFile
 	FlagFiles []string
@@ -199,6 +209,8 @@ func (cm *ConfigManager) loadConfigFile() error {
 	if err != nil {
 		return fmt.Errorf("Could not parse the config file: %s", err)
 	}
+	cm.Config.printValidationWarnings()
+
 	return nil
 }
 

remote_syslog.go

@@ -53,6 +53,11 @@ func tailOne(file string, excludePatterns []*regexp.Regexp, logger *syslog.Logge
 // Tails files speficied in the globs and re-evaluates the globs
 // at the specified interval
 func tailFiles(globs []string, excludedFiles []*regexp.Regexp, excludePatterns []*regexp.Regexp, interval RefreshInterval, logger *syslog.Logger, severity syslog.Priority, facility syslog.Priority, poll bool) {
+	if len(globs) == 0 {
+		log.Criticalf("Supplied no files to watch")
+		os.Exit(1)
+	}
+
 	wr := NewWorkerRegistry()
 	log.Debugf("Evaluating globs every %s", interval.Duration)
 	logMissingFiles := true