ListCommand.php

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<?php
 
namespace Symfony\Component\Console\Command;
 
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Output\Output;
use Symfony\Component\Console\Command\Command;
 
/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */
 
class ListCommand extends Command
{
    protected function configure()
    {
        $this
            ->setDefinition(array(
                new InputArgument('namespace', InputArgument::OPTIONAL, 'The namespace name'),
                new InputOption('xml', null, InputOption::VALUE_NONE, 'To output help as XML'),
            ))
            ->setName('list')
            ->setDescription('Lists commands')
            ->setHelp(<<<EOF
The <info>list</info> command lists all commands:
 
  <info>./symfony list</info>
 
You can also display the commands for a specific namespace:
 
  <info>./symfony list test</info>
 
You can also output the information as XML by using the <comment>--xml</comment> option:
 
  <info>./symfony list --xml</info>
EOF
            );
    }
 
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        if ($input->getOption('xml')) {
            $output->writeln($this->application->asXml($input->getArgument('namespace')), Output::OUTPUT_RAW);
        } else {
            $output->writeln($this->application->asText($input->getArgument('namespace')));
        }
    }
}