Null run()

in lib/src/help_command.dart [27:61]

• 26 lines of code
• 6 McCabe index (conditional complexity)

  Null run() {
    // Show the default help if no command was specified.
    if (argResults!.rest.isEmpty) {
      runner!.printUsage();
      return;
    }

    // Walk the command tree to show help for the selected command or
    // subcommand.
    var commands = runner!.commands;
    Command? command;
    var commandString = runner!.executableName;

    for (var name in argResults!.rest) {
      if (commands.isEmpty) {
        command!.usageException(
            'Command "$commandString" does not expect a subcommand.');
      }

      if (commands[name] == null) {
        if (command == null) {
          runner!.usageException('Could not find a command named "$name".');
        }

        command.usageException(
            'Could not find a subcommand named "$name" for "$commandString".');
      }

      command = commands[name];
      commands = command!.subcommands as Map<String, Command<T>>;
      commandString += ' $name';
    }

    command!.printUsage();
  }