From e55fa6884836d977eeed0d66346a5fa6eadef4bd Mon Sep 17 00:00:00 2001
From: Konstantin Lebedev <9497591+kmlebedev@users.noreply.github.com>
Date: Mon, 13 Nov 2023 19:14:00 +0500
Subject: [PATCH] fix: excludeFileName is empty

---
 weed/command/filer_backup.go | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/weed/command/filer_backup.go b/weed/command/filer_backup.go
index 2ae48cd40..cd63f49f7 100644
--- a/weed/command/filer_backup.go
+++ b/weed/command/filer_backup.go
@@ -93,9 +93,12 @@ func doFilerBackup(grpcDialOption grpc.DialOption, backupOption *FilerBackupOpti
 	sourceFiler := pb.ServerAddress(*backupOption.filer)
 	sourcePath := *backupOption.path
 	excludePaths := util.StringSplit(*backupOption.excludePaths, ",")
-	reExcludeFileName, err := regexp.Compile(*backupOption.excludeFileName)
-	if err != nil {
-		return fmt.Errorf("error compile regexp %v for exclude file name: %+v", *backupOption.excludeFileName, err)
+	var reExcludeFileName *regexp.Regexp
+	if *backupOption.excludeFileName != "" {
+		var err error
+		if reExcludeFileName, err = regexp.Compile(*backupOption.excludeFileName); err != nil {
+			return fmt.Errorf("error compile regexp %v for exclude file name: %+v", *backupOption.excludeFileName, err)
+		}
 	}
 	timeAgo := *backupOption.timeAgo
 	targetPath := dataSink.GetSinkToDirectory()