simplify a bit

weed/command/filer_remote_sync.go

@@ -46,7 +46,7 @@ func init() {
 	cmdFilerRemoteSynchronize.Run = runFilerRemoteSynchronize // break init cycle
 	remoteSyncOptions.filerAddress = cmdFilerRemoteSynchronize.Flag.String("filer", "localhost:8888", "filer of the SeaweedFS cluster")
 	remoteSyncOptions.dir = cmdFilerRemoteSynchronize.Flag.String("dir", "", "a mounted directory on filer")
-	remoteSyncOptions.storageClass = cmdFilerRemoteSynchronize.Flag.String("storageClass", "None", "override amz storage class, empty to delete")
+	remoteSyncOptions.storageClass = cmdFilerRemoteSynchronize.Flag.String("storageClass", "", "override amz storage class, empty to delete")
 	remoteSyncOptions.readChunkFromFiler = cmdFilerRemoteSynchronize.Flag.Bool("filerProxy", false, "read file chunks from filer instead of volume servers")
 	remoteSyncOptions.timeAgo = cmdFilerRemoteSynchronize.Flag.Duration("timeAgo", 0, "start time before now, skipping previous metadata changes. \"300ms\", \"1.5h\" or \"2h45m\". Valid time units are \"ns\", \"us\" (or \"µs\"), \"ms\", \"s\", \"m\", \"h\"")
 	remoteSyncOptions.clientId = util.RandomInt32()

weed/command/filer_remote_sync_dir.go

@@ -37,11 +37,10 @@ func followUpdatesAndUploadToRemote(option *RemoteSyncOptions, filerSource *sour
 
 	var lastLogTsNs = time.Now().UnixNano()
 	processEventFnWithOffset := pb.AddOffsetFunc(func(resp *filer_pb.SubscribeMetadataResponse) error {
-		storageClass := *option.storageClass
-		if storageClass == "" {
+		if *option.storageClass == "" {
 			delete(resp.EventNotification.NewEntry.Extended, s3_constants.AmzStorageClass)
-		} else if storageClass != "None" {
-			resp.EventNotification.NewEntry.Extended[s3_constants.AmzStorageClass] = []byte(storageClass)
+		} else {
+			resp.EventNotification.NewEntry.Extended[s3_constants.AmzStorageClass] = []byte(*option.storageClass)
 		}
 		processor.AddSyncJob(resp)
 		return nil