[CLC-429]: Change cancel message on dmt start command (#431)

base/commands/migration/migration_start.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 
 	"github.com/hazelcast/hazelcast-commandline-client/clc"
+	"github.com/hazelcast/hazelcast-commandline-client/clc/cmd"
 	"github.com/hazelcast/hazelcast-commandline-client/clc/paths"
 	"github.com/hazelcast/hazelcast-commandline-client/clc/ux/stage"
 	clcerrors "github.com/hazelcast/hazelcast-commandline-client/errors"
@@ -33,11 +34,15 @@ func (StartCmd) Init(cc plug.InitContext) error {
 }
 
 func (StartCmd) Exec(ctx context.Context, ec plug.ExecContext) (err error) {
+	cmd.SetCancelMsg(" (Ctrl+C to exit) ")
 	ec.PrintlnUnnecessary("")
 	ec.PrintlnUnnecessary(`Hazelcast Data Migration Tool v5.3.0
 (c) 2023 Hazelcast, Inc.
 	
-Selected data structures in the source cluster will be migrated to the target cluster.	
+Selected data structures in the source cluster will be migrated to the target cluster.
+
+Exiting the application does not affect the migration progress.
+In order to cancel the migration, use the 'cancel' command.
 `)
 	conf := ec.GetStringArg(argDMTConfig)
 	if !paths.Exists(conf) {

clc/cmd/exec_context.go

@@ -29,10 +29,22 @@ import (
 	"github.com/hazelcast/hazelcast-commandline-client/internal/types"
 )
 
-const (
-	cancelMsg = " (Ctrl+C to cancel) "
+var (
+	cancelMsg atomic.Value
 )
 
+func SetCancelMsg(msg string) {
+	cancelMsg.Store(msg)
+}
+
+func GetCancelMsg() string {
+	return cancelMsg.Load().(string)
+}
+
+func init() {
+	SetCancelMsg(" (Ctrl+C to cancel) ")
+}
+
 type ClientFn func(ctx context.Context, cfg hazelcast.Config) (*hazelcast.ClientInternal, error)
 
 type ExecContext struct {
@@ -409,7 +421,7 @@ func (s *simpleSpinner) SetText(text string) {
 		s.sp.Prefix("")
 		return
 	}
-	s.sp.Prefix("      " + text + cancelMsg)
+	s.sp.Prefix("      " + text + GetCancelMsg())
 }
 
 func (s *simpleSpinner) SetProgress(progress float32) {