/**
* Extract the supplied backup.
*
* @param DatabaseBackup $backup
* @return void
* @throws \RuntimeException if the archive for the given backup does not
* exist or is not readable.
*/
public function extract(DatabaseBackup $backup)
{
$archive = $backup->getTempFileName();
if (!is_readable($archive)) {
throw new \RuntimeException("Archive does not exist or is not readable: {$archive}");
}
exec("{$this->getBinary()} -fk {$archive}");
}
