setName('config:get') ->setDescription("Gets a configuration option's value") ->addArgument( 'key', InputArgument::REQUIRED, "The configuration option's name" ) ->addOption( 'no-newline', null, InputOption::VALUE_NONE, 'Set this option if the value should be printed without a new line at the end.' ) ; } protected function execute(InputInterface $input, OutputInterface $output) { $key = $input->getArgument('key'); if (isset($this->config[$key]) && $input->getOption('no-newline')) { $output->write($this->config[$key]); } elseif (isset($this->config[$key])) { $output->writeln($this->config[$key]); } else { $output->writeln("Could not get config $key"); } } }