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].');
}
/**
* Helper for setting a subcommand to retrieve help for.
*
* @param \Symfony\Component\Console\Command\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 {
$namespaces = [];
// List available commands.
$commands = $this->getApplication()->all();
// Find the alignment width.
$width = 0;
foreach ($commands as $command) {
$width = strlen($command->getName()) > $width ? strlen($command->getName()) : $width;
}
$width += 2;
foreach ($commands as $name => $command) {
if ($name !== $command->getName()) {
continue;
}
if ($command->getAliases()) {
$aliases = sprintf(' Aliases: %s', implode(', ', $command->getAliases()));
} else {
$aliases = '';
}
$namespace = '';
if ($command instanceof DrushCommand) {
$namespace = $command->getNamespace();
}
if (empty($namespace)) {
$namespace = static::PSYSH_CATEGORY;
}
if (!isset($namespaces[$namespace])) {
$namespaces[$namespace] = [];
}
$namespaces[$namespace][] = sprintf(" %-${width}s %s%s", $name, $command->getDescription(), $aliases);
}
$messages = [];
foreach ($namespaces as $namespace => $command_messages) {
$messages[] = '';
$messages[] = sprintf('%s', OutputFormatter::escape($namespace));
foreach ($command_messages as $command_message) {
$messages[] = $command_message;
}
}
$output->page($messages);
}
}
}