tools: support get all groups (tikv#6714)

ref tikv#5895, ref tikv#6706

Signed-off-by: Ryan Leung <[email protected]>

tests/pdctl/keyspace/keyspace_group_test.go

@@ -128,6 +128,18 @@ func TestSplitKeyspaceGroup(t *testing.T) {
 		return strings.Contains(string(output), "Success")
 	})
 
+	// get all keyspaces
+	args := []string{"-u", pdAddr, "keyspace-group"}
+	output, err := pdctl.ExecuteCommand(cmd, args...)
+	re.NoError(err)
+	strings.Contains(string(output), "Success")
+	var keyspaceGroups []*endpoint.KeyspaceGroup
+	err = json.Unmarshal(output, &keyspaceGroups)
+	re.NoError(err)
+	re.Len(keyspaceGroups, 2)
+	re.Equal(keyspaceGroups[0].ID, uint32(0))
+	re.Equal(keyspaceGroups[1].ID, uint32(1))
+
 	re.NoError(failpoint.Disable("github.com/tikv/pd/pkg/keyspace/acceleratedAllocNodes"))
 	re.NoError(failpoint.Disable("github.com/tikv/pd/server/delayStartServerLoop"))
 }

tools/pd-ctl/pdctl/command/keyspace_group_command.go

@@ -132,13 +132,15 @@ func showKeyspaceGroupsCommandFunc(cmd *cobra.Command, args []string) {
 			cmd.Printf("Failed to get state: %s\n", err)
 		}
 		stateValue := ""
-		state = strings.ToLower(state)
-		switch state {
-		case "merge", "split":
-			stateValue = fmt.Sprintf("state=%v", state)
-		default:
-			cmd.Println("Unknown state: " + state)
-			return
+		if len(state) != 0 {
+			state = strings.ToLower(state)
+			switch state {
+			case "merge", "split":
+				stateValue = fmt.Sprintf("state=%v", state)
+			default:
+				cmd.Println("Unknown state: " + state)
+				return
+			}
 		}
 
 		if len(stateValue) != 0 {

tools/pd-ctl/pdctl/command/store_command.go

@@ -565,7 +565,6 @@ func labelStoreCommandFunc(cmd *cobra.Command, args []string) {
 	} else if rewrite, _ := cmd.Flags().GetBool("rewrite"); rewrite {
 		prefix += "?force=true"
 	}
-	cmd.Println(prefix)
 	postJSON(cmd, prefix, labels)
 }