/**
* Prints out the usage message to the user.
* @return void
*/
public function usage()
{
$requiredArguments = $this->filter->required();
$optionalArguments = $this->filter->optional();
$allArguments = array_merge($requiredArguments, $optionalArguments);
$command = $this->parser->getCommand();
$args = array();
$num_required = count($requiredArguments);
$num_optional = count($optionalArguments);
echo "Usage: " . $command . " ";
foreach ($allArguments as $argument) {
/** @var Argument $argument */
$args[] = '[' . $argument->usageInfo() . ']';
}
$args = implode(' ', $args);
echo $args . "\n\n";
if ($num_required) {
echo "Required Arguments:\n";
foreach ($requiredArguments as $argument) {
echo $argument->usageLine();
}
}
if ($num_required && $num_optional) {
echo "\n";
}
if ($num_optional) {
echo "Optional Arguments:\n";
foreach ($optionalArguments as $argument) {
echo $argument->usageLine();
}
}
echo "\n";
}
