add flag for output dir of report file

base/commands/migration/const.go

@@ -19,3 +19,5 @@ const (
 	StatusFailed     Status = "FAILED"
 	StatusInProgress Status = "IN_PROGRESS"
 )
+
+const flagOutputDir = "output-dir"

base/commands/migration/migration_start.go

@@ -25,6 +25,7 @@ func (StartCmd) Init(cc plug.InitContext) error {
 	cc.SetCommandHelp(help, help)
 	cc.SetPositionalArgCount(1, 1)
 	cc.AddBoolFlag(clc.FlagAutoYes, "", false, false, "start the migration without confirmation")
+	cc.AddStringFlag(flagOutputDir, "o", "", false, "output directory for the migration report, if not given current directory is used")
 	return nil
 }
 
@@ -47,7 +48,7 @@ Selected data structures in the source cluster will be migrated to the target cl
 	}
 	ec.PrintlnUnnecessary("")
 	var updateTopic *hazelcast.Topic
-	sts := NewStartStages(updateTopic, MakeMigrationID(), ec.Args()[0])
+	sts := NewStartStages(updateTopic, MakeMigrationID(), ec.Args()[0], ec.Props().GetString(flagOutputDir))
 	if !sts.topicListenerID.Default() && sts.updateTopic != nil {
 		if err := sts.updateTopic.RemoveListener(ctx, sts.topicListenerID); err != nil {
 			return err

base/commands/migration/start_stages.go

@@ -28,20 +28,22 @@ type StartStages struct {
 	updateTopic     *hazelcast.Topic
 	topicListenerID types.UUID
 	updateMsgChan   chan UpdateMessage
+	reportOutputDir string
 }
 
 var timeoutErr = fmt.Errorf("migration could not be completed: reached timeout while reading status: "+
 	"please ensure that you are using Hazelcast's migration cluster distribution and your DMT config points to that cluster: %w",
 	context.DeadlineExceeded)
 
-func NewStartStages(updateTopic *hazelcast.Topic, migrationID, configDir string) *StartStages {
+func NewStartStages(updateTopic *hazelcast.Topic, migrationID, configDir, reportOutputDir string) *StartStages {
 	if migrationID == "" {
 		panic("migrationID is required")
 	}
 	return &StartStages{
-		updateTopic: updateTopic,
-		migrationID: migrationID,
-		configDir:   configDir,
+		updateTopic:     updateTopic,
+		migrationID:     migrationID,
+		configDir:       configDir,
+		reportOutputDir: reportOutputDir,
 	}
 }
 
@@ -162,7 +164,10 @@ func (st *StartStages) handleUpdateMessage(ctx context.Context, ec plug.ExecCont
 			return true, fmt.Errorf("reading status: %w", err)
 		}
 		ec.PrintlnUnnecessary(ms.Report)
-		name := fmt.Sprintf("migration_report_%s", st.migrationID)
+		var name string
+		if st.reportOutputDir == "" {
+			name = fmt.Sprintf("migration_report_%s", st.migrationID)
+		}
 		if err = saveReportToFile(name, ms.Report); err != nil {
 			return true, fmt.Errorf("writing report to file: %w", err)
 		}