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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2015 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\Command;
use Symfony\Component\Console\Helper\TableHelper;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Help command.
*
* Lists available commands, and gives command-specific help when asked nicely.
*/
class HelpCommand extends Command
{
private $command;
/**
* {@inheritdoc}
*/
protected function configure()
{
$this
->setName('help')
->setAliases(array('?'))
->setDefinition(array(
new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name', null),
))
->setDescription('Show a list of commands. Type `help [foo]` for information about [foo].')
->setHelp('My. How meta.');
}
/**
* Helper for setting a subcommand to retrieve help for.
*
* @param Command $command
*/
public function setCommand($command)
{
$this->command = $command;
}
/**
* {@inheritdoc}
*/
protected function execute(InputInterface $input, OutputInterface $output)
{
if ($this->command !== null) {
// help for an individual command
$output->page($this->command->asText());
$this->command = null;
} elseif ($name = $input->getArgument('command_name')) {
// help for an individual command
$output->page($this->getApplication()->get($name)->asText());
} else {
// list available commands
$commands = $this->getApplication()->all();
$table = $this->getTable($output);
foreach ($commands as $name => $command) {
if ($name !== $command->getName()) {
continue;
}
if ($command->getAliases()) {
$aliases = sprintf('<comment>Aliases:</comment> %s', implode(', ', $command->getAliases()));
} else {
$aliases = '';
}
$table->addRow(array(
sprintf('<info>%s</info>', $name),
$command->getDescription(),
$aliases,
));
}
$output->startPaging();
if ($table instanceof TableHelper) {
$table->render($output);
} else {
$table->render();
}
$output->stopPaging();
}
}
}