Add log levels (#332)

util/util.go

@@ -469,6 +469,22 @@ func LookupEnvOrStrings(key string, defaultVal []string) []string {
 	return defaultVal
 }
 
+func ParseLogLevel(lvl string) (log.Lvl, error) {
+	switch strings.ToLower(lvl) {
+	case "debug":
+		return log.DEBUG, nil
+	case "info":
+		return log.INFO, nil
+	case "warn":
+		return log.WARN, nil
+	case "error":
+		return log.ERROR, nil
+	case "off":
+		return log.OFF, nil
+	default:
+		return log.DEBUG, fmt.Errorf("not a valid log level: %s", lvl)
+	}
+
 // GetCurrentHash returns current hashes
 func GetCurrentHash(db store.IStore) (string, string) {
 	hashClients, _ := dirhash.HashDir(path.Join(db.GetPath(), "clients"), "prefix", dirhash.Hash1)