public function desiccate(Index $index)
{
$writer = new StringWriter();
$entries = $index->getEntries();
$writer->writeString8(Index::SIGNATURE);
$writer->writeUInt32BE(Index::VERSION);
$writer->writeUInt32BE(count($entries));
$contents_offset = $writer->getOffset();
usort($entries, function ($a, $b) {
$cmp = strcmp($a->getName(), $b->getName());
if ($cmp == 0) {
return ($a->getStage() - $b->getStage());
}
return $cmp;
});
foreach ($entries as $entry) {
$start = $writer->getOffset();
$this->writeEntryTime($writer, $entry->getCtime());
$this->writeEntryTime($writer, $entry->getMtime());
$writer->writeUInt32BE($entry->getDev());
$writer->writeUInt32BE($entry->getInode());
$writer->writeUInt32BE($entry->getMode());
$writer->writeUInt32BE($entry->getUid());
$writer->writeUInt32BE($entry->getGid());
$writer->writeUInt32BE($entry->getFileSize());
$writer->writeHHex($entry->getBlob()->getSha());
//FIXME: Stage
$writer->writeUInt16BE(strlen($entry->getName()));
$stop = $writer->getOffset();
$length = $stop - $start + strlen($entry->getName()) + 1;
//We need at least 1 NUL
$padded_length = ceil($length / 8) * 8;
$rest_length = $padded_length - $length;
$writer->writeString8($entry->getName(), strlen($entry->getName()) + 1 + $rest_length);
}
$writer->writeHHex(sha1($writer->toString()));
return $writer->toString();
}
