Fix mixup between stdout and stderr in CLI (#11529)

cmd/mattermost/commands/channel.go

@@ -456,7 +456,7 @@ func listChannelsCmdF(command *cobra.Command, args []string) error {
 				if channel.Type == model.CHANNEL_PRIVATE {
 					output += " (private)"
 				}
-				CommandPrintErrorln(output)
+				CommandPrettyPrintln(output)
 			}
 		}
 	}

cmd/mattermost/commands/export.go

@@ -198,7 +198,7 @@ func bulkExportCmdF(command *cobra.Command, args []string) error {
 
 	// args[0] points to the filename/filepath passed with export bulk command
 	if err := a.BulkExport(fileWriter, args[0], pathToEmojiDir, dirNameToExportEmoji); err != nil {
-		CommandPrettyPrintln(err.Error())
+		CommandPrintErrorln(err.Error())
 		return err
 	}
 

cmd/mattermost/commands/import.go

@@ -138,9 +138,9 @@ func bulkImportCmdF(command *cobra.Command, args []string) error {
 	CommandPrettyPrintln("")
 
 	if err, lineNumber := a.BulkImport(fileReader, !apply, workers); err != nil {
-		CommandPrettyPrintln(err.Error())
+		CommandPrintErrorln(err.Error())
 		if lineNumber != 0 {
-			CommandPrettyPrintln(fmt.Sprintf("Error occurred on data file line %v", lineNumber))
+			CommandPrintErrorln(fmt.Sprintf("Error occurred on data file line %v", lineNumber))
 		}
 		return err
 	}

cmd/mattermost/commands/output.go

@@ -17,5 +17,5 @@ func CommandPrintErrorln(a ...interface{}) (int, error) {
 }
 
 func CommandPrettyPrintln(a ...interface{}) (int, error) {
-	return fmt.Fprintln(os.Stderr, a...)
+	return fmt.Fprintln(os.Stdout, a...)
 }