/**
* Detect the stub and set it in the pharchive instance.
*
* @return void
*
* @throws \RuntimeException When the stub is invalid.
*/
private function detectStub()
{
$buffer = '';
do {
if ('' === ($chunk = $this->file->read(1024, true))) {
throw new \RuntimeException('Could not detect the stub\'s end in the phar');
}
$buffer .= $chunk;
unset($chunk);
} while (!preg_match('{__HALT_COMPILER\\(\\);(?: \\?>)?\\r?\\n}', $buffer, $match, PREG_OFFSET_CAPTURE));
// detect manifest offset / end of stub
$stubEnd = $match[0][1] + strlen($match[0][0]);
$this->file->seek($stubEnd);
$this->phar->setStub(substr($buffer, 0, $stubEnd));
}
