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DiffusionLowLevelFilesizeQuery.php
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Fri, Nov 29, 15:29

DiffusionLowLevelFilesizeQuery.php
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<?php
final class DiffusionLowLevelFilesizeQuery
extends DiffusionLowLevelQuery {
private $identifier;
public function withIdentifier($identifier) {
$this->identifier = $identifier;
return $this;
}
protected function executeQuery() {
if (!strlen($this->identifier)) {
throw new PhutilInvalidStateException('withIdentifier');
}
$type = $this->getRepository()->getVersionControlSystem();
switch ($type) {
case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
$result = $this->loadGitFilesizes();
break;
default:
throw new Exception(pht('Unsupported repository type "%s"!', $type));
}
return $result;
}
private function loadGitFilesizes() {
$repository = $this->getRepository();
$identifier = $this->identifier;
$paths_future = $repository->getLocalCommandFuture(
'diff-tree -z -r --no-commit-id %s --',
$identifier);
// With "-z" we get "<fields>\0<filename>\0" for each line. Process the
// delimited text as "<fields>, <filename>" pairs.
$path_lines = id(new LinesOfALargeExecFuture($paths_future))
->setDelimiter("\0");
$paths = array();
$path_pairs = new PhutilChunkedIterator($path_lines, 2);
foreach ($path_pairs as $path_pair) {
if (count($path_pair) != 2) {
throw new Exception(
pht(
'Unexpected number of output lines from "git diff-tree" when '.
'processing commit ("%s"): expected an even number of lines.',
$identifier));
}
list($fields, $pathname) = array_values($path_pair);
$fields = explode(' ', $fields);
// Fields are:
//
// :100644 100644 aaaa bbbb M
//
// [0] Old file mode.
// [1] New file mode.
// [2] Old object hash.
// [3] New object hash.
// [4] Change mode.
$paths[] = array(
'path' => $pathname,
'newHash' => $fields[3],
);
}
$path_sizes = array();
if (!$paths) {
return $path_sizes;
}
$check_paths = array();
foreach ($paths as $path) {
if ($path['newHash'] === DiffusionCommitHookEngine::EMPTY_HASH) {
$path_sizes[$path['path']] = 0;
continue;
}
$check_paths[$path['newHash']][] = $path['path'];
}
if (!$check_paths) {
return $path_sizes;
}
$future = $repository->getLocalCommandFuture(
'cat-file --batch-check=%s',
'%(objectsize)');
$future->write(implode("\n", array_keys($check_paths)));
$size_lines = id(new LinesOfALargeExecFuture($future))
->setDelimiter("\n");
foreach ($size_lines as $line) {
$object_size = (int)$line;
$object_hash = head_key($check_paths);
$path_names = $check_paths[$object_hash];
unset($check_paths[$object_hash]);
foreach ($path_names as $path_name) {
$path_sizes[$path_name] = $object_size;
}
}
if ($check_paths) {
throw new Exception(
pht(
'Unexpected number of output lines from "git cat-file" when '.
'processing commit ("%s").',
$identifier));
}
return $path_sizes;
}
}

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