cmd/cli: do not validate invalid syntax config

If the remote custom config is an invalid syntax config, we should not
do rules validation, prevent unnecessary error messages printed.

cmd/cli/cli.go

@@ -1843,7 +1843,11 @@ func doValidateCdRemoteConfig(cdUID string, fatal bool) error {
 	oldV := v
 	var cfgErr error
 	remoteCfg := &ctrld.Config{}
-	if cfgErr = validateCdRemoteConfig(rc, remoteCfg); cfgErr != nil {
+	if cfgErr = validateCdRemoteConfig(rc, remoteCfg); cfgErr == nil {
+		setListenerDefaultValue(remoteCfg)
+		setNetworkDefaultValue(remoteCfg)
+		cfgErr = validateConfig(remoteCfg)
+	} else {
 		if errors.As(cfgErr, &viper.ConfigParseError{}) {
 			if configStr, _ := base64.StdEncoding.DecodeString(rc.Ctrld.CustomConfig); len(configStr) > 0 {
 				tmpDir := os.TempDir()
@@ -1866,11 +1870,7 @@ func doValidateCdRemoteConfig(cdUID string, fatal bool) error {
 		} else {
 			mainLog.Load().Error().Msgf("failed to unmarshal custom config: %v", err)
 		}
-	} else {
-		setListenerDefaultValue(remoteCfg)
-		setNetworkDefaultValue(remoteCfg)
 	}
-	cfgErr = validateConfig(remoteCfg)
 	if cfgErr != nil {
 		mainLog.Load().Warn().Msg("disregarding invalid custom config")
 	}

cmd/cli/prog.go

@@ -351,15 +351,19 @@ func (p *prog) apiConfigReload() {
 		if resolverConfig.Ctrld.CustomLastUpdate > lastUpdated || forced {
 			lastUpdated = time.Now().Unix()
 			cfg := &ctrld.Config{}
-			if err := validateCdRemoteConfig(resolverConfig, cfg); err != nil {
+			var cfgErr error
+			if cfgErr = validateCdRemoteConfig(resolverConfig, cfg); cfgErr == nil {
+				setListenerDefaultValue(cfg)
+				setNetworkDefaultValue(cfg)
+				cfgErr = validateConfig(cfg)
+			}
+			if cfgErr != nil {
 				logger.Warn().Err(err).Msg("skipping invalid custom config")
 				if _, err := controld.UpdateCustomLastFailed(cdUID, rootCmd.Version, cdDev, true); err != nil {
 					logger.Error().Err(err).Msg("could not mark custom last update failed")
 				}
 				return
 			}
-			setListenerDefaultValue(cfg)
-			setNetworkDefaultValue(cfg)
 			logger.Debug().Msg("custom config changes detected, reloading...")
 			p.apiReloadCh <- cfg
 		} else {