/**
* Signs the archive.
*
* @param Builder $builder The archive builder.
*
* @return BuildCommand For method chaining.
*/
private function sign(Builder $builder)
{
$event = new PreSignEvent($builder, constant('Phar::' . $this->config['build']['signature']['algorithm']), $this->config['build']['signature']['file']);
$this->dispatcher->dispatch(Events::PRE_BUILD_SIGN, $event);
$builder->setSignatureAlgorithm($event->getAlgorithm(), $event->getPath());
$this->dispatcher->dispatch(Events::POST_BUILD_SIGN, new PostSignEvent($builder, $event->getAlgorithm(), $event->getPath()));
return $this;
}