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phab/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php
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DiffusionLowLevelParentsQuery.php
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<?php
final class DiffusionLowLevelParentsQuery
extends DiffusionLowLevelQuery {
private $identifier;
public function withIdentifier($identifier) {
$this->identifier = $identifier;
return $this;
}
protected function executeQuery() {
if (!strlen($this->identifier)) {
throw new Exception(
pht('You must provide an identifier with withIdentifier()!'));
}
$type = $this->getRepository()->getVersionControlSystem();
switch ($type) {
case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
$result = $this->loadGitParents();
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
$result = $this->loadMercurialParents();
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
$result = $this->loadSubversionParents();
break;
default:
throw new Exception(pht('Unsupported repository type "%s"!', $type));
}
return $result;
}
private function loadGitParents() {
$repository = $this->getRepository();
list($stdout) = $repository->execxLocalCommand(
'log -n 1 --format=%s %s',
'%P',
$this->identifier);
return preg_split('/\s+/', trim($stdout));
}
private function loadMercurialParents() {
$repository = $this->getRepository();
list($stdout) = $repository->execxLocalCommand(
'log --debug --limit 1 --template={parents} --rev %s',
$this->identifier);
$stdout = PhabricatorRepository::filterMercurialDebugOutput($stdout);
$hashes = preg_split('/\s+/', trim($stdout));
foreach ($hashes as $key => $value) {
// Mercurial parents look like "23:ad9f769d6f786fad9f76d9a" -- we want
// to strip out the local rev part.
list($local, $global) = explode(':', $value);
$hashes[$key] = $global;
// With --debug we get 40-character hashes but also get the "000000..."
// hash for missing parents; ignore it.
if (preg_match('/^0+$/', $global)) {
unset($hashes[$key]);
}
}
return $hashes;
}
private function loadSubversionParents() {
$n = (int)$this->identifier;
if ($n > 1) {
$ids = array($n - 1);
} else {
$ids = array();
}
return $ids;
}
}
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