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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
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\Command\Command;
/**
* HelpCommand displays the help for a given command.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class HelpCommand extends Command
{
private $command;
/**
* {@inheritdoc}
*/
protected function configure()
{
$this->ignoreValidationErrors();
$this
->setName('help')
->setDefinition(array(
new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name', 'help'),
new InputOption('xml', null, InputOption::VALUE_NONE, 'To output help as XML'),
))
->setDescription('Displays help for a command')
->setHelp(<<<EOF
The <info>%command.name%</info> command displays help for a given command:
<info>php %command.full_name% list</info>
You can also output the help as XML by using the <comment>--xml</comment> option:
<info>php %command.full_name% --xml list</info>
To display the list of available commands, please use the <info>list</info> command.
EOF
)
;
}
/**
* Sets the command
*
* @param Command $command The command to set
*/
public function setCommand(Command $command)
{
$this->command = $command;
}
/**
* {@inheritdoc}
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
if (null === $this->command) {
$this->command = $this->getApplication()->find($input->getArgument('command_name'));
}
if ($input->getOption('xml')) {
$output->writeln($this->command->asXml(), OutputInterface::OUTPUT_RAW);
} else {
$output->writeln($this->command->asText());
}
$this->command = null;
}
}
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