PhabricatorRepositoryDiscoveryEngine.php
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Created: Sat, Feb 22, 19:15

PhabricatorRepositoryDiscoveryEngine.php
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	<?php

	/**
	* @task discover Discovering Repositories
	* @task svn Discovering Subversion Repositories
	* @task git Discovering Git Repositories
	* @task hg Discovering Mercurial Repositories
	* @task internal Internals
	*/
	final class PhabricatorRepositoryDiscoveryEngine
	extends PhabricatorRepositoryEngine {

	private $repairMode;
	private $commitCache = array();
	private $workingSet = array();

	const MAX_COMMIT_CACHE_SIZE = 2048;


	/* -( Discovering Repositories )------------------------------------------- */


	public function setRepairMode($repair_mode) {
	$this->repairMode = $repair_mode;
	return $this;
	}


	public function getRepairMode() {
	return $this->repairMode;
	}


	/**
	* @task discovery
	*/
	public function discoverCommits() {
	$repository = $this->getRepository();

	$lock = $this->newRepositoryLock($repository, 'repo.look', false);

	try {
	$lock->lock();
	} catch (PhutilLockException $ex) {
	throw new DiffusionDaemonLockException(
	pht(
	'Another process is currently discovering repository "%s", '.
	'skipping discovery.',
	$repository->getDisplayName()));
	}

	try {
	$result = $this->discoverCommitsWithLock();
	} catch (Exception $ex) {
	$lock->unlock();
	throw $ex;
	}

	$lock->unlock();

	return $result;
	}

	private function discoverCommitsWithLock() {
	$repository = $this->getRepository();
	$viewer = $this->getViewer();

	$vcs = $repository->getVersionControlSystem();
	switch ($vcs) {
	case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
	$refs = $this->discoverSubversionCommits();
	break;
	case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
	$refs = $this->discoverMercurialCommits();
	break;
	case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
	$refs = $this->discoverGitCommits();
	break;
	default:
	throw new Exception(pht("Unknown VCS '%s'!", $vcs));
	}

	if ($this->isInitialImport($refs)) {
	$this->log(
	pht(
	'Discovered more than %s commit(s) in an empty repository, '.
	'marking repository as importing.',
	new PhutilNumber(PhabricatorRepository::IMPORT_THRESHOLD)));

	$repository->markImporting();
	}

	// Clear the working set cache.
	$this->workingSet = array();

	// Record discovered commits and mark them in the cache.
	foreach ($refs as $ref) {
	$this->recordCommit(
	$repository,
	$ref->getIdentifier(),
	$ref->getEpoch(),
	$ref->getCanCloseImmediately(),
	$ref->getParents());

	$this->commitCache[$ref->getIdentifier()] = true;
	}

	$this->markUnreachableCommits($repository);

	$version = $this->getObservedVersion($repository);
	if ($version !== null) {
	id(new DiffusionRepositoryClusterEngine())
	->setViewer($viewer)
	->setRepository($repository)
	->synchronizeWorkingCopyAfterDiscovery($version);
	}

	return $refs;
	}


	/* -( Discovering Git Repositories )--------------------------------------- */


	/**
	* @task git
	*/
	private function discoverGitCommits() {
	$repository = $this->getRepository();

	if (!$repository->isHosted()) {
	$this->verifyGitOrigin($repository);
	}

	$heads = id(new DiffusionLowLevelGitRefQuery())
	->setRepository($repository)
	->execute();

	if (!$heads) {
	// This repository has no heads at all, so we don't need to do
	// anything. Generally, this means the repository is empty.
	return array();
	}

	$heads = $this->sortRefs($heads);
	$head_commits = mpull($heads, 'getCommitIdentifier');

	$this->log(
	pht(
	'Discovering commits in repository "%s".',
	$repository->getDisplayName()));

	$this->fillCommitCache($head_commits);

	$refs = array();
	foreach ($heads as $ref) {
	$name = $ref->getShortName();
	$commit = $ref->getCommitIdentifier();

	$this->log(
	pht(
	'Examining "%s" (%s) at "%s".',
	$name,
	$ref->getRefType(),
	$commit));

	if (!$repository->shouldTrackRef($ref)) {
	$this->log(pht('Skipping, ref is untracked.'));
	continue;
	}

	if ($this->isKnownCommit($commit)) {
	$this->log(pht('Skipping, HEAD is known.'));
	continue;
	}

	// In Git, it's possible to tag a tag. We just skip these, we'll discover
	// them when we process the target tag. See T11180.
	$fields = $ref->getRawFields();
	$tag_type = idx($fields, '*objecttype');
	if ($tag_type == 'tag') {
	$this->log(pht('Skipping, this is a tag of a tag.'));
	continue;
	}

	$this->log(pht('Looking for new commits.'));

	$head_refs = $this->discoverStreamAncestry(
	new PhabricatorGitGraphStream($repository, $commit),
	$commit,
	$repository->shouldAutocloseRef($ref));

	$this->didDiscoverRefs($head_refs);

	$refs[] = $head_refs;
	}

	return array_mergev($refs);
	}


	/* -( Discovering Subversion Repositories )-------------------------------- */


	/**
	* @task svn
	*/
	private function discoverSubversionCommits() {
	$repository = $this->getRepository();

	if (!$repository->isHosted()) {
	$this->verifySubversionRoot($repository);
	}

	$upper_bound = null;
	$limit = 1;
	$refs = array();
	do {
	// Find all the unknown commits on this path. Note that we permit
	// importing an SVN subdirectory rather than the entire repository, so
	// commits may be nonsequential.

	if ($upper_bound === null) {
	$at_rev = 'HEAD';
	} else {
	$at_rev = ($upper_bound - 1);
	}

	try {
	list($xml, $stderr) = $repository->execxRemoteCommand(
	'log --xml --quiet --limit %d %s',
	$limit,
	$repository->getSubversionBaseURI($at_rev));
	} catch (CommandException $ex) {
	$stderr = $ex->getStdErr();
	if (preg_match('/(path\|File) not found/', $stderr)) {
	// We've gone all the way back through history and this path was not
	// affected by earlier commits.
	break;
	}
	throw $ex;
	}

	$xml = phutil_utf8ize($xml);
	$log = new SimpleXMLElement($xml);
	foreach ($log->logentry as $entry) {
	$identifier = (int)$entry['revision'];
	$epoch = (int)strtotime((string)$entry->date[0]);
	$refs[$identifier] = id(new PhabricatorRepositoryCommitRef())
	->setIdentifier($identifier)
	->setEpoch($epoch)
	->setCanCloseImmediately(true);

	if ($upper_bound === null) {
	$upper_bound = $identifier;
	} else {
	$upper_bound = min($upper_bound, $identifier);
	}
	}

	// Discover 2, 4, 8, ... 256 logs at a time. This allows us to initially
	// import large repositories fairly quickly, while pulling only as much
	// data as we need in the common case (when we've already imported the
	// repository and are just grabbing one commit at a time).
	$limit = min($limit * 2, 256);

	} while ($upper_bound > 1 && !$this->isKnownCommit($upper_bound));

	krsort($refs);
	while ($refs && $this->isKnownCommit(last($refs)->getIdentifier())) {
	array_pop($refs);
	}
	$refs = array_reverse($refs);

	$this->didDiscoverRefs($refs);

	return $refs;
	}


	private function verifySubversionRoot(PhabricatorRepository $repository) {
	list($xml) = $repository->execxRemoteCommand(
	'info --xml %s',
	$repository->getSubversionPathURI());

	$xml = phutil_utf8ize($xml);
	$xml = new SimpleXMLElement($xml);

	$remote_root = (string)($xml->entry[0]->repository[0]->root[0]);
	$expect_root = $repository->getSubversionPathURI();

	$normal_type_svn = PhabricatorRepositoryURINormalizer::TYPE_SVN;

	$remote_normal = id(new PhabricatorRepositoryURINormalizer(
	$normal_type_svn,
	$remote_root))->getNormalizedPath();

	$expect_normal = id(new PhabricatorRepositoryURINormalizer(
	$normal_type_svn,
	$expect_root))->getNormalizedPath();

	if ($remote_normal != $expect_normal) {
	throw new Exception(
	pht(
	'Repository "%s" does not have a correctly configured remote URI. '.
	'The remote URI for a Subversion repository MUST point at the '.
	'repository root. The root for this repository is "%s", but the '.
	'configured URI is "%s". To resolve this error, set the remote URI '.
	'to point at the repository root. If you want to import only part '.
	'of a Subversion repository, use the "Import Only" option.',
	$repository->getDisplayName(),
	$remote_root,
	$expect_root));
	}
	}


	/* -( Discovering Mercurial Repositories )--------------------------------- */


	/**
	* @task hg
	*/
	private function discoverMercurialCommits() {
	$repository = $this->getRepository();

	$branches = id(new DiffusionLowLevelMercurialBranchesQuery())
	->setRepository($repository)
	->execute();

	$this->fillCommitCache(mpull($branches, 'getCommitIdentifier'));

	$refs = array();
	foreach ($branches as $branch) {
	// NOTE: Mercurial branches may have multiple heads, so the names may
	// not be unique.
	$name = $branch->getShortName();
	$commit = $branch->getCommitIdentifier();

	$this->log(pht('Examining branch "%s" head "%s".', $name, $commit));
	if (!$repository->shouldTrackBranch($name)) {
	$this->log(pht('Skipping, branch is untracked.'));
	continue;
	}

	if ($this->isKnownCommit($commit)) {
	$this->log(pht('Skipping, this head is a known commit.'));
	continue;
	}

	$this->log(pht('Looking for new commits.'));

	$branch_refs = $this->discoverStreamAncestry(
	new PhabricatorMercurialGraphStream($repository, $commit),
	$commit,
	$close_immediately = true);

	$this->didDiscoverRefs($branch_refs);

	$refs[] = $branch_refs;
	}

	return array_mergev($refs);
	}


	/* -( Internals )---------------------------------------------------------- */


	private function discoverStreamAncestry(
	PhabricatorRepositoryGraphStream $stream,
	$commit,
	$close_immediately) {

	$discover = array($commit);
	$graph = array();
	$seen = array();

	// Find all the reachable, undiscovered commits. Build a graph of the
	// edges.
	while ($discover) {
	$target = array_pop($discover);

	if (empty($graph[$target])) {
	$graph[$target] = array();
	}

	$parents = $stream->getParents($target);
	foreach ($parents as $parent) {
	if ($this->isKnownCommit($parent)) {
	continue;
	}

	$graph[$target][$parent] = true;

	if (empty($seen[$parent])) {
	$seen[$parent] = true;
	$discover[] = $parent;
	}
	}
	}

	// Now, sort them topographically.
	$commits = $this->reduceGraph($graph);

	$refs = array();
	foreach ($commits as $commit) {
	$refs[] = id(new PhabricatorRepositoryCommitRef())
	->setIdentifier($commit)
	->setEpoch($stream->getCommitDate($commit))
	->setCanCloseImmediately($close_immediately)
	->setParents($stream->getParents($commit));
	}

	return $refs;
	}


	private function reduceGraph(array $edges) {
	foreach ($edges as $commit => $parents) {
	$edges[$commit] = array_keys($parents);
	}

	$graph = new PhutilDirectedScalarGraph();
	$graph->addNodes($edges);

	$commits = $graph->getTopographicallySortedNodes();

	// NOTE: We want the most ancestral nodes first, so we need to reverse the
	// list we get out of AbstractDirectedGraph.
	$commits = array_reverse($commits);

	return $commits;
	}


	private function isKnownCommit($identifier) {
	if (isset($this->commitCache[$identifier])) {
	return true;
	}

	if (isset($this->workingSet[$identifier])) {
	return true;
	}

	if ($this->repairMode) {
	// In repair mode, rediscover the entire repository, ignoring the
	// database state. We can hit the local cache above, but if we miss it
	// stop the script from going to the database cache.
	return false;
	}

	$this->fillCommitCache(array($identifier));

	return isset($this->commitCache[$identifier]);
	}

	private function fillCommitCache(array $identifiers) {
	if (!$identifiers) {
	return;
	}

	// When filling the cache we ignore commits which have been marked as
	// unreachable, treating them as though they do not exist. When recording
	// commits later we'll revive commits that exist but are unreachable.

	$commits = id(new PhabricatorRepositoryCommit())->loadAllWhere(
	'repositoryID = %d AND commitIdentifier IN (%Ls)
	AND (importStatus & %d) != %d',
	$this->getRepository()->getID(),
	$identifiers,
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE,
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE);

	foreach ($commits as $commit) {
	$this->commitCache[$commit->getCommitIdentifier()] = true;
	}

	while (count($this->commitCache) > self::MAX_COMMIT_CACHE_SIZE) {
	array_shift($this->commitCache);
	}
	}

	/**
	* Sort branches so we process closeable branches first. This makes the
	* whole import process a little cheaper, since we can close these commits
	* the first time through rather than catching them in the refs step.
	*
	* @task internal
	*
	* @param list<DiffusionRepositoryRef> List of refs.
	* @return list<DiffusionRepositoryRef> Sorted list of refs.
	*/
	private function sortRefs(array $refs) {
	$repository = $this->getRepository();

	$head_refs = array();
	$tail_refs = array();
	foreach ($refs as $ref) {
	if ($repository->shouldAutocloseRef($ref)) {
	$head_refs[] = $ref;
	} else {
	$tail_refs[] = $ref;
	}
	}

	return array_merge($head_refs, $tail_refs);
	}


	private function recordCommit(
	PhabricatorRepository $repository,
	$commit_identifier,
	$epoch,
	$close_immediately,
	array $parents) {

	$commit = new PhabricatorRepositoryCommit();
	$conn_w = $repository->establishConnection('w');

	// First, try to revive an existing unreachable commit (if one exists) by
	// removing the "unreachable" flag. If we succeed, we don't need to do
	// anything else: we already discovered this commit some time ago.
	queryfx(
	$conn_w,
	'UPDATE %T SET importStatus = (importStatus & ~%d)
	WHERE repositoryID = %d AND commitIdentifier = %s',
	$commit->getTableName(),
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE,
	$repository->getID(),
	$commit_identifier);
	if ($conn_w->getAffectedRows()) {
	$commit = $commit->loadOneWhere(
	'repositoryID = %d AND commitIdentifier = %s',
	$repository->getID(),
	$commit_identifier);

	// After reviving a commit, schedule new daemons for it.
	$this->didDiscoverCommit($repository, $commit, $epoch);
	return;
	}

	$commit->setRepositoryID($repository->getID());
	$commit->setCommitIdentifier($commit_identifier);
	$commit->setEpoch($epoch);
	if ($close_immediately) {
	$commit->setImportStatus(PhabricatorRepositoryCommit::IMPORTED_CLOSEABLE);
	}

	$data = new PhabricatorRepositoryCommitData();

	try {
	// If this commit has parents, look up their IDs. The parent commits
	// should always exist already.

	$parent_ids = array();
	if ($parents) {
	$parent_rows = queryfx_all(
	$conn_w,
	'SELECT id, commitIdentifier FROM %T
	WHERE commitIdentifier IN (%Ls) AND repositoryID = %d',
	$commit->getTableName(),
	$parents,
	$repository->getID());

	$parent_map = ipull($parent_rows, 'id', 'commitIdentifier');

	foreach ($parents as $parent) {
	if (empty($parent_map[$parent])) {
	throw new Exception(
	pht('Unable to identify parent "%s"!', $parent));
	}
	$parent_ids[] = $parent_map[$parent];
	}
	} else {
	// Write an explicit 0 so we can distinguish between "really no
	// parents" and "data not available".
	if (!$repository->isSVN()) {
	$parent_ids = array(0);
	}
	}

	$commit->openTransaction();
	$commit->save();

	$data->setCommitID($commit->getID());
	$data->save();

	foreach ($parent_ids as $parent_id) {
	queryfx(
	$conn_w,
	'INSERT IGNORE INTO %T (childCommitID, parentCommitID)
	VALUES (%d, %d)',
	PhabricatorRepository::TABLE_PARENTS,
	$commit->getID(),
	$parent_id);
	}
	$commit->saveTransaction();

	$this->didDiscoverCommit($repository, $commit, $epoch);

	if ($this->repairMode) {
	// Normally, the query should throw a duplicate key exception. If we
	// reach this in repair mode, we've actually performed a repair.
	$this->log(pht('Repaired commit "%s".', $commit_identifier));
	}

	PhutilEventEngine::dispatchEvent(
	new PhabricatorEvent(
	PhabricatorEventType::TYPE_DIFFUSION_DIDDISCOVERCOMMIT,
	array(
	'repository' => $repository,
	'commit' => $commit,
	)));

	} catch (AphrontDuplicateKeyQueryException $ex) {
	$commit->killTransaction();
	// Ignore. This can happen because we discover the same new commit
	// more than once when looking at history, or because of races or
	// data inconsistency or cosmic radiation; in any case, we're still
	// in a good state if we ignore the failure.
	}
	}

	private function didDiscoverCommit(
	PhabricatorRepository $repository,
	PhabricatorRepositoryCommit $commit,
	$epoch) {

	$this->insertTask($repository, $commit);

	// Update the repository summary table.
	queryfx(
	$commit->establishConnection('w'),
	'INSERT INTO %T (repositoryID, size, lastCommitID, epoch)
	VALUES (%d, 1, %d, %d)
	ON DUPLICATE KEY UPDATE
	size = size + 1,
	lastCommitID =
	IF(VALUES(epoch) > epoch, VALUES(lastCommitID), lastCommitID),
	epoch = IF(VALUES(epoch) > epoch, VALUES(epoch), epoch)',
	PhabricatorRepository::TABLE_SUMMARY,
	$repository->getID(),
	$commit->getID(),
	$epoch);
	}

	private function didDiscoverRefs(array $refs) {
	foreach ($refs as $ref) {
	$this->workingSet[$ref->getIdentifier()] = true;
	}
	}

	private function insertTask(
	PhabricatorRepository $repository,
	PhabricatorRepositoryCommit $commit,
	$data = array()) {

	$vcs = $repository->getVersionControlSystem();
	switch ($vcs) {
	case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
	$class = 'PhabricatorRepositoryGitCommitMessageParserWorker';
	break;
	case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
	$class = 'PhabricatorRepositorySvnCommitMessageParserWorker';
	break;
	case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
	$class = 'PhabricatorRepositoryMercurialCommitMessageParserWorker';
	break;
	default:
	throw new Exception(pht("Unknown repository type '%s'!", $vcs));
	}

	$data['commitID'] = $commit->getID();

	PhabricatorWorker::scheduleTask($class, $data);
	}

	private function isInitialImport(array $refs) {
	$commit_count = count($refs);

	if ($commit_count <= PhabricatorRepository::IMPORT_THRESHOLD) {
	// If we fetched a small number of commits, assume it's an initial
	// commit or a stack of a few initial commits.
	return false;
	}

	$viewer = $this->getViewer();
	$repository = $this->getRepository();

	$any_commits = id(new DiffusionCommitQuery())
	->setViewer($viewer)
	->withRepository($repository)
	->setLimit(1)
	->execute();

	if ($any_commits) {
	// If the repository already has commits, this isn't an import.
	return false;
	}

	return true;
	}


	private function getObservedVersion(PhabricatorRepository $repository) {
	if ($repository->isHosted()) {
	return null;
	}

	if ($repository->isGit()) {
	return $this->getGitObservedVersion($repository);
	}

	return null;
	}

	private function getGitObservedVersion(PhabricatorRepository $repository) {
	$refs = id(new DiffusionLowLevelGitRefQuery())
	->setRepository($repository)
	->execute();
	if (!$refs) {
	return null;
	}

	// In Git, the observed version is the most recently discovered commit
	// at any repository HEAD. It's possible for this to regress temporarily
	// if a branch is pushed and then deleted. This is acceptable because it
	// doesn't do anything meaningfully bad and will fix itself on the next
	// push.

	$ref_identifiers = mpull($refs, 'getCommitIdentifier');
	$ref_identifiers = array_fuse($ref_identifiers);

	$version = queryfx_one(
	$repository->establishConnection('w'),
	'SELECT MAX(id) version FROM %T WHERE repositoryID = %d
	AND commitIdentifier IN (%Ls)',
	id(new PhabricatorRepositoryCommit())->getTableName(),
	$repository->getID(),
	$ref_identifiers);

	if (!$version) {
	return null;
	}

	return (int)$version['version'];
	}

	private function markUnreachableCommits(PhabricatorRepository $repository) {
	// For now, this is only supported for Git.
	if (!$repository->isGit()) {
	return;
	}

	// Find older versions of refs which we haven't processed yet. We're going
	// to make sure their commits are still reachable.
	$old_refs = id(new PhabricatorRepositoryOldRef())->loadAllWhere(
	'repositoryPHID = %s',
	$repository->getPHID());

	// If we don't have any refs to update, bail out before building a graph
	// stream. In particular, this improves behavior in empty repositories,
	// where `git log` exits with an error.
	if (!$old_refs) {
	return;
	}

	// We can share a single graph stream across all the checks we need to do.
	$stream = new PhabricatorGitGraphStream($repository);

	foreach ($old_refs as $old_ref) {
	$identifier = $old_ref->getCommitIdentifier();
	$this->markUnreachableFrom($repository, $stream, $identifier);

	// If nothing threw an exception, we're all done with this ref.
	$old_ref->delete();
	}
	}

	private function markUnreachableFrom(
	PhabricatorRepository $repository,
	PhabricatorGitGraphStream $stream,
	$identifier) {

	$unreachable = array();

	$commit = id(new PhabricatorRepositoryCommit())->loadOneWhere(
	'repositoryID = %s AND commitIdentifier = %s',
	$repository->getID(),
	$identifier);
	if (!$commit) {
	return;
	}

	$look = array($commit);
	$seen = array();
	while ($look) {
	$target = array_pop($look);

	// If we've already checked this commit (for example, because history
	// branches and then merges) we don't need to check it again.
	$target_identifier = $target->getCommitIdentifier();
	if (isset($seen[$target_identifier])) {
	continue;
	}

	$seen[$target_identifier] = true;

	try {
	$stream->getCommitDate($target_identifier);
	$reachable = true;
	} catch (Exception $ex) {
	$reachable = false;
	}

	if ($reachable) {
	// This commit is reachable, so we don't need to go any further
	// down this road.
	continue;
	}

	$unreachable[] = $target;

	// Find the commit's parents and check them for reachability, too. We
	// have to look in the database since we no may longer have the commit
	// in the repository.
	$rows = queryfx_all(
	$commit->establishConnection('w'),
	'SELECT commit.* FROM %T commit
	JOIN %T parents ON commit.id = parents.parentCommitID
	WHERE parents.childCommitID = %d',
	$commit->getTableName(),
	PhabricatorRepository::TABLE_PARENTS,
	$target->getID());
	if (!$rows) {
	continue;
	}

	$parents = id(new PhabricatorRepositoryCommit())
	->loadAllFromArray($rows);
	foreach ($parents as $parent) {
	$look[] = $parent;
	}
	}

	$unreachable = array_reverse($unreachable);

	$flag = PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE;
	foreach ($unreachable as $unreachable_commit) {
	$unreachable_commit->writeImportStatusFlag($flag);
	}

	// If anything was unreachable, just rebuild the whole summary table.
	// We can't really update it incrementally when a commit becomes
	// unreachable.
	if ($unreachable) {
	$this->rebuildSummaryTable($repository);
	}
	}

	private function rebuildSummaryTable(PhabricatorRepository $repository) {
	$conn_w = $repository->establishConnection('w');

	$data = queryfx_one(
	$conn_w,
	'SELECT COUNT(*) N, MAX(id) id, MAX(epoch) epoch
	FROM %T WHERE repositoryID = %d AND (importStatus & %d) != %d',
	id(new PhabricatorRepositoryCommit())->getTableName(),
	$repository->getID(),
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE,
	PhabricatorRepositoryCommit::IMPORTED_UNREACHABLE);

	queryfx(
	$conn_w,
	'INSERT INTO %T (repositoryID, size, lastCommitID, epoch)
	VALUES (%d, %d, %d, %d)
	ON DUPLICATE KEY UPDATE
	size = VALUES(size),
	lastCommitID = VALUES(lastCommitID),
	epoch = VALUES(epoch)',
	PhabricatorRepository::TABLE_SUMMARY,
	$repository->getID(),
	$data['N'],
	$data['id'],
	$data['epoch']);
	}

	}

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