topic: fix set-config

cmd/kaf/topic.go

@@ -55,7 +55,7 @@ var topicsCmd = &cobra.Command{
 
 var topicSetConfig = &cobra.Command{
 	Use:     "set-config",
-	Short:   "set topic config",
+	Short:   "set topic config. requires Kafka >=2.3.0 on broker side and kaf cluster config.",
 	Example: "kaf topic set-config topic.name \"cleanup.policy=delete\"",
 	Args:    cobra.ExactArgs(2),
 	Run: func(cmd *cobra.Command, args []string) {
@@ -64,7 +64,7 @@ var topicSetConfig = &cobra.Command{
 		topic := args[0]
 
 		splt := strings.Split(args[1], ",")
-		configs := make(map[string]*string)
+		configs := make(map[string]sarama.IncrementalAlterConfigsEntry)
 
 		for _, kv := range splt {
 			s := strings.Split(kv, "=")
@@ -75,14 +75,17 @@ var topicSetConfig = &cobra.Command{
 
 			key := s[0]
 			value := s[1]
-			configs[key] = &value
+			configs[key] = sarama.IncrementalAlterConfigsEntry{
+				Operation: sarama.IncrementalAlterConfigsOperationSet,
+				Value:     &value,
+			}
 		}
 
 		if len(configs) < 1 {
 			errorExit("No valid configs found")
 		}
 
-		err := admin.AlterConfig(sarama.TopicResource, topic, configs, false)
+		err := admin.IncrementalAlterConfig(sarama.TopicResource, topic, configs, false)
 		if err != nil {
 			errorExit("Unable to alter topic config: %v\n", err)
 		}