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R IENDB`
setName('help')
->setAliases(['?'])
->setDefinition([
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 $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('Aliases: %s', \implode(', ', $command->getAliases()));
} else {
$aliases = '';
}
$table->addRow([
\sprintf('%s', $name),
$command->getDescription(),
$aliases,
]);
}
if ($output instanceof ShellOutput) {
$output->startPaging();
}
if ($table instanceof TableHelper) {
$table->render($output);
} else {
$table->render();
}
if ($output instanceof ShellOutput) {
$output->stopPaging();
}
}
return 0;
}
}