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	diff --git a/src/applications/differential/query/DifferentialRevisionQuery.php b/src/applications/differential/query/DifferentialRevisionQuery.php
	index c77e99d8c2..75d3e052e4 100644
	--- a/src/applications/differential/query/DifferentialRevisionQuery.php
	+++ b/src/applications/differential/query/DifferentialRevisionQuery.php
	@@ -1,1137 +1,1091 @@
	<?php

	/**
	* @task config Query Configuration
	* @task exec Query Execution
	* @task internal Internals
	*/
	final class DifferentialRevisionQuery
	extends PhabricatorCursorPagedPolicyAwareQuery {

	- private $pathIDs = array();
	-
	private $authors = array();
	private $draftAuthors = array();
	private $ccs = array();
	private $reviewers = array();
	private $revIDs = array();
	private $commitHashes = array();
	private $phids = array();
	private $responsibles = array();
	private $branches = array();
	private $repositoryPHIDs;
	private $updatedEpochMin;
	private $updatedEpochMax;
	private $statuses;
	private $isOpen;
	private $createdEpochMin;
	private $createdEpochMax;
	private $noReviewers;
	private $paths;

	const ORDER_MODIFIED = 'order-modified';
	const ORDER_CREATED = 'order-created';

	private $needActiveDiffs = false;
	private $needDiffIDs = false;
	private $needCommitPHIDs = false;
	private $needHashes = false;
	private $needReviewers = false;
	private $needReviewerAuthority;
	private $needDrafts;
	private $needFlags;


	/* -( Query Configuration )------------------------------------------------ */

	-
	- /**
	- * Filter results to revisions which affect a Diffusion path ID in a given
	- * repository. You can call this multiple times to select revisions for
	- * several paths.
	- *
	- * @param int Diffusion repository ID.
	- * @param int Diffusion path ID.
	- * @return this
	- * @task config
	- */
	- public function withPath($repository_id, $path_id) {
	- $this->pathIDs[] = array(
	- 'repositoryID' => $repository_id,
	- 'pathID' => $path_id,
	- );
	- return $this;
	- }
	-
	/**
	* Find revisions affecting one or more items in a list of paths.
	*
	* @param list<string> List of file paths.
	* @return this
	* @task config
	*/
	public function withPaths(array $paths) {
	$this->paths = $paths;
	return $this;
	}

	/**
	* Filter results to revisions authored by one of the given PHIDs. Calling
	* this function will clear anything set by previous calls to
	* @{method:withAuthors}.
	*
	* @param array List of PHIDs of authors
	* @return this
	* @task config
	*/
	public function withAuthors(array $author_phids) {
	$this->authors = $author_phids;
	return $this;
	}

	/**
	* Filter results to revisions which CC one of the listed people. Calling this
	* function will clear anything set by previous calls to @{method:withCCs}.
	*
	* @param array List of PHIDs of subscribers.
	* @return this
	* @task config
	*/
	public function withCCs(array $cc_phids) {
	$this->ccs = $cc_phids;
	return $this;
	}

	/**
	* Filter results to revisions that have one of the provided PHIDs as
	* reviewers. Calling this function will clear anything set by previous calls
	* to @{method:withReviewers}.
	*
	* @param array List of PHIDs of reviewers
	* @return this
	* @task config
	*/
	public function withReviewers(array $reviewer_phids) {
	if ($reviewer_phids === array()) {
	throw new Exception(
	pht(
	'Empty "withReviewers()" constraint is invalid. Provide one or '.
	'more values, or remove the constraint.'));
	}

	$with_none = false;

	foreach ($reviewer_phids as $key => $phid) {
	switch ($phid) {
	case DifferentialNoReviewersDatasource::FUNCTION_TOKEN:
	$with_none = true;
	unset($reviewer_phids[$key]);
	break;
	default:
	break;
	}
	}

	$this->noReviewers = $with_none;
	if ($reviewer_phids) {
	$this->reviewers = array_values($reviewer_phids);
	}

	return $this;
	}

	/**
	* Filter results to revisions that have one of the provided commit hashes.
	* Calling this function will clear anything set by previous calls to
	* @{method:withCommitHashes}.
	*
	* @param array List of pairs <Class
	* ArcanistDifferentialRevisionHash::HASH_$type constant,
	* hash>
	* @return this
	* @task config
	*/
	public function withCommitHashes(array $commit_hashes) {
	$this->commitHashes = $commit_hashes;
	return $this;
	}

	public function withStatuses(array $statuses) {
	$this->statuses = $statuses;
	return $this;
	}

	public function withIsOpen($is_open) {
	$this->isOpen = $is_open;
	return $this;
	}


	/**
	* Filter results to revisions on given branches.
	*
	* @param list List of branch names.
	* @return this
	* @task config
	*/
	public function withBranches(array $branches) {
	$this->branches = $branches;
	return $this;
	}


	/**
	* Filter results to only return revisions whose ids are in the given set.
	*
	* @param array List of revision ids
	* @return this
	* @task config
	*/
	public function withIDs(array $ids) {
	$this->revIDs = $ids;
	return $this;
	}


	/**
	* Filter results to only return revisions whose PHIDs are in the given set.
	*
	* @param array List of revision PHIDs
	* @return this
	* @task config
	*/
	public function withPHIDs(array $phids) {
	$this->phids = $phids;
	return $this;
	}


	/**
	* Given a set of users, filter results to return only revisions they are
	* responsible for (i.e., they are either authors or reviewers).
	*
	* @param array List of user PHIDs.
	* @return this
	* @task config
	*/
	public function withResponsibleUsers(array $responsible_phids) {
	$this->responsibles = $responsible_phids;
	return $this;
	}


	public function withRepositoryPHIDs(array $repository_phids) {
	$this->repositoryPHIDs = $repository_phids;
	return $this;
	}

	public function withUpdatedEpochBetween($min, $max) {
	$this->updatedEpochMin = $min;
	$this->updatedEpochMax = $max;
	return $this;
	}

	public function withCreatedEpochBetween($min, $max) {
	$this->createdEpochMin = $min;
	$this->createdEpochMax = $max;
	return $this;
	}


	/**
	* Set whether or not the query should load the active diff for each
	* revision.
	*
	* @param bool True to load and attach diffs.
	* @return this
	* @task config
	*/
	public function needActiveDiffs($need_active_diffs) {
	$this->needActiveDiffs = $need_active_diffs;
	return $this;
	}


	/**
	* Set whether or not the query should load the associated commit PHIDs for
	* each revision.
	*
	* @param bool True to load and attach diffs.
	* @return this
	* @task config
	*/
	public function needCommitPHIDs($need_commit_phids) {
	$this->needCommitPHIDs = $need_commit_phids;
	return $this;
	}


	/**
	* Set whether or not the query should load associated diff IDs for each
	* revision.
	*
	* @param bool True to load and attach diff IDs.
	* @return this
	* @task config
	*/
	public function needDiffIDs($need_diff_ids) {
	$this->needDiffIDs = $need_diff_ids;
	return $this;
	}


	/**
	* Set whether or not the query should load associated commit hashes for each
	* revision.
	*
	* @param bool True to load and attach commit hashes.
	* @return this
	* @task config
	*/
	public function needHashes($need_hashes) {
	$this->needHashes = $need_hashes;
	return $this;
	}


	/**
	* Set whether or not the query should load associated reviewers.
	*
	* @param bool True to load and attach reviewers.
	* @return this
	* @task config
	*/
	public function needReviewers($need_reviewers) {
	$this->needReviewers = $need_reviewers;
	return $this;
	}


	/**
	* Request information about the viewer's authority to act on behalf of each
	* reviewer. In particular, they have authority to act on behalf of projects
	* they are a member of.
	*
	* @param bool True to load and attach authority.
	* @return this
	* @task config
	*/
	public function needReviewerAuthority($need_reviewer_authority) {
	$this->needReviewerAuthority = $need_reviewer_authority;
	return $this;
	}

	public function needFlags($need_flags) {
	$this->needFlags = $need_flags;
	return $this;
	}

	public function needDrafts($need_drafts) {
	$this->needDrafts = $need_drafts;
	return $this;
	}


	/* -( Query Execution )---------------------------------------------------- */


	public function newResultObject() {
	return new DifferentialRevision();
	}


	/**
	* Execute the query as configured, returning matching
	* @{class:DifferentialRevision} objects.
	*
	* @return list List of matching DifferentialRevision objects.
	* @task exec
	*/
	protected function loadPage() {
	$data = $this->loadData();
	$data = $this->didLoadRawRows($data);
	$table = $this->newResultObject();
	return $table->loadAllFromArray($data);
	}

	protected function willFilterPage(array $revisions) {
	$viewer = $this->getViewer();

	$repository_phids = mpull($revisions, 'getRepositoryPHID');
	$repository_phids = array_filter($repository_phids);

	$repositories = array();
	if ($repository_phids) {
	$repositories = id(new PhabricatorRepositoryQuery())
	->setViewer($this->getViewer())
	->withPHIDs($repository_phids)
	->execute();
	$repositories = mpull($repositories, null, 'getPHID');
	}

	// If a revision is associated with a repository:
	//
	// - the viewer must be able to see the repository; or
	// - the viewer must have an automatic view capability.
	//
	// In the latter case, we'll load the revision but not load the repository.

	$can_view = PhabricatorPolicyCapability::CAN_VIEW;
	foreach ($revisions as $key => $revision) {
	$repo_phid = $revision->getRepositoryPHID();
	if (!$repo_phid) {
	// The revision has no associated repository. Attach `null` and move on.
	$revision->attachRepository(null);
	continue;
	}

	$repository = idx($repositories, $repo_phid);
	if ($repository) {
	// The revision has an associated repository, and the viewer can see
	// it. Attach it and move on.
	$revision->attachRepository($repository);
	continue;
	}

	if ($revision->hasAutomaticCapability($can_view, $viewer)) {
	// The revision has an associated repository which the viewer can not
	// see, but the viewer has an automatic capability on this revision.
	// Load the revision without attaching a repository.
	$revision->attachRepository(null);
	continue;
	}

	if ($this->getViewer()->isOmnipotent()) {
	// The viewer is omnipotent. Allow the revision to load even without
	// a repository.
	$revision->attachRepository(null);
	continue;
	}

	// The revision has an associated repository, and the viewer can't see
	// it, and the viewer has no special capabilities. Filter out this
	// revision.
	$this->didRejectResult($revision);
	unset($revisions[$key]);
	}

	if (!$revisions) {
	return array();
	}

	$table = new DifferentialRevision();
	$conn_r = $table->establishConnection('r');

	if ($this->needCommitPHIDs) {
	$this->loadCommitPHIDs($revisions);
	}

	$need_active = $this->needActiveDiffs;
	$need_ids = $need_active \|\| $this->needDiffIDs;

	if ($need_ids) {
	$this->loadDiffIDs($conn_r, $revisions);
	}

	if ($need_active) {
	$this->loadActiveDiffs($conn_r, $revisions);
	}

	if ($this->needHashes) {
	$this->loadHashes($conn_r, $revisions);
	}

	if ($this->needReviewers \|\| $this->needReviewerAuthority) {
	$this->loadReviewers($conn_r, $revisions);
	}

	return $revisions;
	}

	protected function didFilterPage(array $revisions) {
	$viewer = $this->getViewer();

	if ($this->needFlags) {
	$flags = id(new PhabricatorFlagQuery())
	->setViewer($viewer)
	->withOwnerPHIDs(array($viewer->getPHID()))
	->withObjectPHIDs(mpull($revisions, 'getPHID'))
	->execute();
	$flags = mpull($flags, null, 'getObjectPHID');
	foreach ($revisions as $revision) {
	$revision->attachFlag(
	$viewer,
	idx($flags, $revision->getPHID()));
	}
	}

	if ($this->needDrafts) {
	PhabricatorDraftEngine::attachDrafts(
	$viewer,
	$revisions);
	}

	return $revisions;
	}

	private function loadData() {
	$table = $this->newResultObject();
	$conn = $table->establishConnection('r');

	$selects = array();

	// NOTE: If the query includes "responsiblePHIDs", we execute it as a
	// UNION of revisions they own and revisions they're reviewing. This has
	// much better performance than doing it with JOIN/WHERE.
	if ($this->responsibles) {
	$basic_authors = $this->authors;
	$basic_reviewers = $this->reviewers;

	try {
	// Build the query where the responsible users are authors.
	$this->authors = array_merge($basic_authors, $this->responsibles);

	$this->reviewers = $basic_reviewers;
	$selects[] = $this->buildSelectStatement($conn);

	// Build the query where the responsible users are reviewers, or
	// projects they are members of are reviewers.
	$this->authors = $basic_authors;
	$this->reviewers = array_merge($basic_reviewers, $this->responsibles);
	$selects[] = $this->buildSelectStatement($conn);

	// Put everything back like it was.
	$this->authors = $basic_authors;
	$this->reviewers = $basic_reviewers;
	} catch (Exception $ex) {
	$this->authors = $basic_authors;
	$this->reviewers = $basic_reviewers;
	throw $ex;
	}
	} else {
	$selects[] = $this->buildSelectStatement($conn);
	}

	if (count($selects) > 1) {
	$unions = null;
	foreach ($selects as $select) {
	if (!$unions) {
	$unions = $select;
	continue;
	}

	$unions = qsprintf(
	$conn,
	'%Q UNION DISTINCT %Q',
	$unions,
	$select);
	}

	$query = qsprintf(
	$conn,
	'%Q %Q %Q',
	$unions,
	$this->buildOrderClause($conn, true),
	$this->buildLimitClause($conn));
	} else {
	$query = head($selects);
	}

	return queryfx_all($conn, '%Q', $query);
	}

	private function buildSelectStatement(AphrontDatabaseConnection $conn_r) {
	$table = new DifferentialRevision();

	$select = $this->buildSelectClause($conn_r);

	$from = qsprintf(
	$conn_r,
	'FROM %T r',
	$table->getTableName());

	$joins = $this->buildJoinsClause($conn_r);
	$where = $this->buildWhereClause($conn_r);
	$group_by = $this->buildGroupClause($conn_r);
	$having = $this->buildHavingClause($conn_r);

	$order_by = $this->buildOrderClause($conn_r);

	$limit = $this->buildLimitClause($conn_r);

	return qsprintf(
	$conn_r,
	'(%Q %Q %Q %Q %Q %Q %Q %Q)',
	$select,
	$from,
	$joins,
	$where,
	$group_by,
	$having,
	$order_by,
	$limit);
	}


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


	/**
	* @task internal
	*/
	private function buildJoinsClause(AphrontDatabaseConnection $conn) {
	$joins = array();
	- if ($this->pathIDs) {
	- $path_table = new DifferentialAffectedPath();
	- $joins[] = qsprintf(
	- $conn,
	- 'JOIN %T p ON p.revisionID = r.id',
	- $path_table->getTableName());
	- }

	if ($this->paths) {
	$path_table = new DifferentialAffectedPath();
	$joins[] = qsprintf(
	$conn,
	'JOIN %R paths ON paths.revisionID = r.id',
	$path_table);
	}

	if ($this->commitHashes) {
	$joins[] = qsprintf(
	$conn,
	'JOIN %T hash_rel ON hash_rel.revisionID = r.id',
	ArcanistDifferentialRevisionHash::TABLE_NAME);
	}

	if ($this->ccs) {
	$joins[] = qsprintf(
	$conn,
	'JOIN %T e_ccs ON e_ccs.src = r.phid '.
	'AND e_ccs.type = %s '.
	'AND e_ccs.dst in (%Ls)',
	PhabricatorEdgeConfig::TABLE_NAME_EDGE,
	PhabricatorObjectHasSubscriberEdgeType::EDGECONST,
	$this->ccs);
	}

	if ($this->reviewers) {
	$joins[] = qsprintf(
	$conn,
	'LEFT JOIN %T reviewer ON reviewer.revisionPHID = r.phid
	AND reviewer.reviewerStatus != %s
	AND reviewer.reviewerPHID in (%Ls)',
	id(new DifferentialReviewer())->getTableName(),
	DifferentialReviewerStatus::STATUS_RESIGNED,
	$this->reviewers);
	}

	if ($this->noReviewers) {
	$joins[] = qsprintf(
	$conn,
	'LEFT JOIN %T no_reviewer ON no_reviewer.revisionPHID = r.phid
	AND no_reviewer.reviewerStatus != %s',
	id(new DifferentialReviewer())->getTableName(),
	DifferentialReviewerStatus::STATUS_RESIGNED);
	}

	if ($this->draftAuthors) {
	$joins[] = qsprintf(
	$conn,
	'JOIN %T has_draft ON has_draft.srcPHID = r.phid
	AND has_draft.type = %s
	AND has_draft.dstPHID IN (%Ls)',
	PhabricatorEdgeConfig::TABLE_NAME_EDGE,
	PhabricatorObjectHasDraftEdgeType::EDGECONST,
	$this->draftAuthors);
	}

	$joins[] = $this->buildJoinClauseParts($conn);

	return $this->formatJoinClause($conn, $joins);
	}


	/**
	* @task internal
	*/
	protected function buildWhereClause(AphrontDatabaseConnection $conn) {
	$viewer = $this->getViewer();
	$where = array();

	- if ($this->pathIDs) {
	- $path_clauses = array();
	- $repo_info = igroup($this->pathIDs, 'repositoryID');
	- foreach ($repo_info as $repository_id => $paths) {
	- $path_clauses[] = qsprintf(
	- $conn,
	- '(p.repositoryID = %d AND p.pathID IN (%Ld))',
	- $repository_id,
	- ipull($paths, 'pathID'));
	- }
	- $path_clauses = qsprintf($conn, '%LO', $path_clauses);
	- $where[] = $path_clauses;
	- }
	-
	if ($this->paths !== null) {
	$paths = $this->paths;

	$path_map = id(new DiffusionPathIDQuery($paths))
	->loadPathIDs();

	if (!$path_map) {
	// If none of the paths have entries in the PathID table, we can not
	// possibly find any revisions affecting them.
	throw new PhabricatorEmptyQueryException();
	}

	$where[] = qsprintf(
	$conn,
	'paths.pathID IN (%Ld)',
	array_fuse($path_map));

	// If we have repository PHIDs, additionally constrain this query to
	// try to help MySQL execute it efficiently.
	if ($this->repositoryPHIDs !== null) {
	$repositories = id(new PhabricatorRepositoryQuery())
	->setViewer($viewer)
	->setParentQuery($this)
	->withPHIDs($this->repositoryPHIDs)
	->execute();

	if (!$repositories) {
	throw new PhabricatorEmptyQueryException();
	}

	$repository_ids = mpull($repositories, 'getID');

	$where[] = qsprintf(
	$conn,
	'paths.repositoryID IN (%Ld)',
	$repository_ids);
	}
	}

	if ($this->authors) {
	$where[] = qsprintf(
	$conn,
	'r.authorPHID IN (%Ls)',
	$this->authors);
	}

	if ($this->revIDs) {
	$where[] = qsprintf(
	$conn,
	'r.id IN (%Ld)',
	$this->revIDs);
	}

	if ($this->repositoryPHIDs) {
	$where[] = qsprintf(
	$conn,
	'r.repositoryPHID IN (%Ls)',
	$this->repositoryPHIDs);
	}

	if ($this->commitHashes) {
	$hash_clauses = array();
	foreach ($this->commitHashes as $info) {
	list($type, $hash) = $info;
	$hash_clauses[] = qsprintf(
	$conn,
	'(hash_rel.type = %s AND hash_rel.hash = %s)',
	$type,
	$hash);
	}
	$hash_clauses = qsprintf($conn, '%LO', $hash_clauses);
	$where[] = $hash_clauses;
	}

	if ($this->phids) {
	$where[] = qsprintf(
	$conn,
	'r.phid IN (%Ls)',
	$this->phids);
	}

	if ($this->branches) {
	$where[] = qsprintf(
	$conn,
	'r.branchName in (%Ls)',
	$this->branches);
	}

	if ($this->updatedEpochMin !== null) {
	$where[] = qsprintf(
	$conn,
	'r.dateModified >= %d',
	$this->updatedEpochMin);
	}

	if ($this->updatedEpochMax !== null) {
	$where[] = qsprintf(
	$conn,
	'r.dateModified <= %d',
	$this->updatedEpochMax);
	}

	if ($this->createdEpochMin !== null) {
	$where[] = qsprintf(
	$conn,
	'r.dateCreated >= %d',
	$this->createdEpochMin);
	}

	if ($this->createdEpochMax !== null) {
	$where[] = qsprintf(
	$conn,
	'r.dateCreated <= %d',
	$this->createdEpochMax);
	}

	if ($this->statuses !== null) {
	$where[] = qsprintf(
	$conn,
	'r.status in (%Ls)',
	$this->statuses);
	}

	if ($this->isOpen !== null) {
	if ($this->isOpen) {
	$statuses = DifferentialLegacyQuery::getModernValues(
	DifferentialLegacyQuery::STATUS_OPEN);
	} else {
	$statuses = DifferentialLegacyQuery::getModernValues(
	DifferentialLegacyQuery::STATUS_CLOSED);
	}
	$where[] = qsprintf(
	$conn,
	'r.status in (%Ls)',
	$statuses);
	}

	$reviewer_subclauses = array();

	if ($this->noReviewers) {
	$reviewer_subclauses[] = qsprintf(
	$conn,
	'no_reviewer.reviewerPHID IS NULL');
	}

	if ($this->reviewers) {
	$reviewer_subclauses[] = qsprintf(
	$conn,
	'reviewer.reviewerPHID IS NOT NULL');
	}

	if ($reviewer_subclauses) {
	$where[] = qsprintf($conn, '%LO', $reviewer_subclauses);
	}

	$where[] = $this->buildWhereClauseParts($conn);

	return $this->formatWhereClause($conn, $where);
	}


	/**
	* @task internal
	*/
	protected function shouldGroupQueryResultRows() {

	- if (count($this->pathIDs) > 1) {
	- return true;
	- }
	-
	if ($this->paths) {
	// (If we have exactly one repository and exactly one path, we don't
	// technically need to group, but it's simpler to always group.)
	return true;
	}

	if (count($this->ccs) > 1) {
	return true;
	}

	if (count($this->reviewers) > 1) {
	return true;
	}

	if (count($this->commitHashes) > 1) {
	return true;
	}

	if ($this->noReviewers) {
	return true;
	}

	return parent::shouldGroupQueryResultRows();
	}

	public function getBuiltinOrders() {
	$orders = parent::getBuiltinOrders() + array(
	'updated' => array(
	'vector' => array('updated', 'id'),
	'name' => pht('Date Updated (Latest First)'),
	'aliases' => array(self::ORDER_MODIFIED),
	),
	'outdated' => array(
	'vector' => array('-updated', '-id'),
	'name' => pht('Date Updated (Oldest First)'),
	),
	);

	// Alias the "newest" builtin to the historical key for it.
	$orders['newest']['aliases'][] = self::ORDER_CREATED;

	return $orders;
	}

	protected function getDefaultOrderVector() {
	return array('updated', 'id');
	}

	public function getOrderableColumns() {
	return array(
	'updated' => array(
	'table' => $this->getPrimaryTableAlias(),
	'column' => 'dateModified',
	'type' => 'int',
	),
	) + parent::getOrderableColumns();
	}

	protected function newPagingMapFromPartialObject($object) {
	return array(
	'id' => (int)$object->getID(),
	'updated' => (int)$object->getDateModified(),
	);
	}

	private function loadCommitPHIDs(array $revisions) {
	assert_instances_of($revisions, 'DifferentialRevision');

	if (!$revisions) {
	return;
	}

	$revisions = mpull($revisions, null, 'getPHID');

	$edge_query = id(new PhabricatorEdgeQuery())
	->withSourcePHIDs(array_keys($revisions))
	->withEdgeTypes(
	array(
	DifferentialRevisionHasCommitEdgeType::EDGECONST,
	));
	$edge_query->execute();

	foreach ($revisions as $phid => $revision) {
	$commit_phids = $edge_query->getDestinationPHIDs(array($phid));
	$revision->attachCommitPHIDs($commit_phids);
	}
	}

	private function loadDiffIDs($conn_r, array $revisions) {
	assert_instances_of($revisions, 'DifferentialRevision');

	$diff_table = new DifferentialDiff();

	$diff_ids = queryfx_all(
	$conn_r,
	'SELECT revisionID, id FROM %T WHERE revisionID IN (%Ld)
	ORDER BY id DESC',
	$diff_table->getTableName(),
	mpull($revisions, 'getID'));
	$diff_ids = igroup($diff_ids, 'revisionID');

	foreach ($revisions as $revision) {
	$ids = idx($diff_ids, $revision->getID(), array());
	$ids = ipull($ids, 'id');
	$revision->attachDiffIDs($ids);
	}
	}

	private function loadActiveDiffs($conn_r, array $revisions) {
	assert_instances_of($revisions, 'DifferentialRevision');

	$diff_table = new DifferentialDiff();

	$load_ids = array();
	foreach ($revisions as $revision) {
	$diffs = $revision->getDiffIDs();
	if ($diffs) {
	$load_ids[] = max($diffs);
	}
	}

	$active_diffs = array();
	if ($load_ids) {
	$active_diffs = $diff_table->loadAllWhere(
	'id IN (%Ld)',
	$load_ids);
	}

	$active_diffs = mpull($active_diffs, null, 'getRevisionID');
	foreach ($revisions as $revision) {
	$revision->attachActiveDiff(idx($active_diffs, $revision->getID()));
	}
	}

	private function loadHashes(
	AphrontDatabaseConnection $conn_r,
	array $revisions) {
	assert_instances_of($revisions, 'DifferentialRevision');

	$data = queryfx_all(
	$conn_r,
	'SELECT * FROM %T WHERE revisionID IN (%Ld)',
	'differential_revisionhash',
	mpull($revisions, 'getID'));

	$data = igroup($data, 'revisionID');
	foreach ($revisions as $revision) {
	$hashes = idx($data, $revision->getID(), array());
	$list = array();
	foreach ($hashes as $hash) {
	$list[] = array($hash['type'], $hash['hash']);
	}
	$revision->attachHashes($list);
	}
	}

	private function loadReviewers(
	AphrontDatabaseConnection $conn,
	array $revisions) {

	assert_instances_of($revisions, 'DifferentialRevision');

	$reviewer_table = new DifferentialReviewer();
	$reviewer_rows = queryfx_all(
	$conn,
	'SELECT * FROM %T WHERE revisionPHID IN (%Ls)
	ORDER BY id ASC',
	$reviewer_table->getTableName(),
	mpull($revisions, 'getPHID'));
	$reviewer_list = $reviewer_table->loadAllFromArray($reviewer_rows);
	$reviewer_map = mgroup($reviewer_list, 'getRevisionPHID');

	foreach ($reviewer_map as $key => $reviewers) {
	$reviewer_map[$key] = mpull($reviewers, null, 'getReviewerPHID');
	}

	$viewer = $this->getViewer();
	$viewer_phid = $viewer->getPHID();

	$allow_key = 'differential.allow-self-accept';
	$allow_self = PhabricatorEnv::getEnvConfig($allow_key);

	// Figure out which of these reviewers the viewer has authority to act as.
	if ($this->needReviewerAuthority && $viewer_phid) {
	$authority = $this->loadReviewerAuthority(
	$revisions,
	$reviewer_map,
	$allow_self);
	}

	foreach ($revisions as $revision) {
	$reviewers = idx($reviewer_map, $revision->getPHID(), array());
	foreach ($reviewers as $reviewer_phid => $reviewer) {
	if ($this->needReviewerAuthority) {
	if (!$viewer_phid) {
	// Logged-out users never have authority.
	$has_authority = false;
	} else if ((!$allow_self) &&
	($revision->getAuthorPHID() == $viewer_phid)) {
	// The author can never have authority unless we allow self-accept.
	$has_authority = false;
	} else {
	// Otherwise, look up whether the viewer has authority.
	$has_authority = isset($authority[$reviewer_phid]);
	}

	$reviewer->attachAuthority($viewer, $has_authority);
	}

	$reviewers[$reviewer_phid] = $reviewer;
	}

	$revision->attachReviewers($reviewers);
	}
	}

	private function loadReviewerAuthority(
	array $revisions,
	array $reviewers,
	$allow_self) {

	$revision_map = mpull($revisions, null, 'getPHID');
	$viewer_phid = $this->getViewer()->getPHID();

	// Find all the project/package reviewers which the user may have authority
	// over.
	$project_phids = array();
	$package_phids = array();
	$project_type = PhabricatorProjectProjectPHIDType::TYPECONST;
	$package_type = PhabricatorOwnersPackagePHIDType::TYPECONST;

	foreach ($reviewers as $revision_phid => $reviewer_list) {
	if (!$allow_self) {
	if ($revision_map[$revision_phid]->getAuthorPHID() == $viewer_phid) {
	// If self-review isn't permitted, the user will never have
	// authority over projects on revisions they authored because you
	// can't accept your own revisions, so we don't need to load any
	// data about these reviewers.
	continue;
	}
	}

	foreach ($reviewer_list as $reviewer_phid => $reviewer) {
	$phid_type = phid_get_type($reviewer_phid);
	if ($phid_type == $project_type) {
	$project_phids[] = $reviewer_phid;
	}
	if ($phid_type == $package_type) {
	$package_phids[] = $reviewer_phid;
	}
	}
	}

	// The viewer has authority over themselves.
	$user_authority = array_fuse(array($viewer_phid));

	// And over any projects they are a member of.
	$project_authority = array();
	if ($project_phids) {
	$project_authority = id(new PhabricatorProjectQuery())
	->setViewer($this->getViewer())
	->withPHIDs($project_phids)
	->withMemberPHIDs(array($viewer_phid))
	->execute();
	$project_authority = mpull($project_authority, 'getPHID');
	$project_authority = array_fuse($project_authority);
	}

	// And over any packages they own.
	$package_authority = array();
	if ($package_phids) {
	$package_authority = id(new PhabricatorOwnersPackageQuery())
	->setViewer($this->getViewer())
	->withPHIDs($package_phids)
	->withAuthorityPHIDs(array($viewer_phid))
	->execute();
	$package_authority = mpull($package_authority, 'getPHID');
	$package_authority = array_fuse($package_authority);
	}

	return $user_authority + $project_authority + $package_authority;
	}

	public function getQueryApplicationClass() {
	return 'PhabricatorDifferentialApplication';
	}

	protected function getPrimaryTableAlias() {
	return 'r';
	}

	}
	diff --git a/src/applications/diffusion/controller/DiffusionBrowseController.php b/src/applications/diffusion/controller/DiffusionBrowseController.php
	index 042c21d232..549c0d649f 100644
	--- a/src/applications/diffusion/controller/DiffusionBrowseController.php
	+++ b/src/applications/diffusion/controller/DiffusionBrowseController.php
	@@ -1,1069 +1,1064 @@
	<?php

	final class DiffusionBrowseController extends DiffusionController {

	private $lintCommit;
	private $lintMessages;
	private $corpusButtons = array();

	public function shouldAllowPublic() {
	return true;
	}

	public function handleRequest(AphrontRequest $request) {
	$response = $this->loadDiffusionContext();
	if ($response) {
	return $response;
	}

	$drequest = $this->getDiffusionRequest();

	// Figure out if we're browsing a directory, a file, or a search result
	// list.

	$grep = $request->getStr('grep');
	if (strlen($grep)) {
	return $this->browseSearch();
	}

	$pager = id(new PHUIPagerView())
	->readFromRequest($request);

	$results = DiffusionBrowseResultSet::newFromConduit(
	$this->callConduitWithDiffusionRequest(
	'diffusion.browsequery',
	array(
	'path' => $drequest->getPath(),
	'commit' => $drequest->getStableCommit(),
	'offset' => $pager->getOffset(),
	'limit' => $pager->getPageSize() + 1,
	)));

	$reason = $results->getReasonForEmptyResultSet();
	$is_file = ($reason == DiffusionBrowseResultSet::REASON_IS_FILE);

	if ($is_file) {
	return $this->browseFile();
	}

	$paths = $results->getPaths();
	$paths = $pager->sliceResults($paths);
	$results->setPaths($paths);

	return $this->browseDirectory($results, $pager);
	}

	private function browseSearch() {
	$drequest = $this->getDiffusionRequest();
	$header = $this->buildHeaderView($drequest);
	$path = nonempty(basename($drequest->getPath()), '/');

	$search_results = $this->renderSearchResults();
	$search_form = $this->renderSearchForm($path);

	$search_form = phutil_tag(
	'div',
	array(
	'class' => 'diffusion-mobile-search-form',
	),
	$search_form);

	$crumbs = $this->buildCrumbs(
	array(
	'branch' => true,
	'path' => true,
	'view' => 'browse',
	));
	$crumbs->setBorder(true);

	$tabs = $this->buildTabsView('code');

	$view = id(new PHUITwoColumnView())
	->setHeader($header)
	->setTabs($tabs)
	->setFooter(
	array(
	$search_form,
	$search_results,
	));

	return $this->newPage()
	->setTitle(
	array(
	nonempty(basename($drequest->getPath()), '/'),
	$drequest->getRepository()->getDisplayName(),
	))
	->setCrumbs($crumbs)
	->appendChild($view);
	}

	private function browseFile() {
	$viewer = $this->getViewer();
	$request = $this->getRequest();
	$drequest = $this->getDiffusionRequest();
	$repository = $drequest->getRepository();

	$before = $request->getStr('before');
	if ($before) {
	return $this->buildBeforeResponse($before);
	}

	$path = $drequest->getPath();
	$params = array(
	'commit' => $drequest->getCommit(),
	'path' => $drequest->getPath(),
	);

	$view = $request->getStr('view');

	$byte_limit = null;
	if ($view !== 'raw') {
	$byte_limit = PhabricatorFileStorageEngine::getChunkThreshold();
	$time_limit = 10;

	$params += array(
	'timeout' => $time_limit,
	'byteLimit' => $byte_limit,
	);
	}

	$response = $this->callConduitWithDiffusionRequest(
	'diffusion.filecontentquery',
	$params);

	$hit_byte_limit = $response['tooHuge'];
	$hit_time_limit = $response['tooSlow'];

	$file_phid = $response['filePHID'];
	$show_editor = false;
	if ($hit_byte_limit) {
	$corpus = $this->buildErrorCorpus(
	pht(
	'This file is larger than %s byte(s), and too large to display '.
	'in the web UI.',
	phutil_format_bytes($byte_limit)));
	} else if ($hit_time_limit) {
	$corpus = $this->buildErrorCorpus(
	pht(
	'This file took too long to load from the repository (more than '.
	'%s second(s)).',
	new PhutilNumber($time_limit)));
	} else {
	$file = id(new PhabricatorFileQuery())
	->setViewer($viewer)
	->withPHIDs(array($file_phid))
	->executeOne();
	if (!$file) {
	throw new Exception(pht('Failed to load content file!'));
	}

	if ($view === 'raw') {
	return $file->getRedirectResponse();
	}

	$data = $file->loadFileData();

	$lfs_ref = $this->getGitLFSRef($repository, $data);
	if ($lfs_ref) {
	if ($view == 'git-lfs') {
	$file = $this->loadGitLFSFile($lfs_ref);

	// Rename the file locally so we generate a better vanity URI for
	// it. In storage, it just has a name like "lfs-13f9a94c0923...",
	// since we don't get any hints about possible human-readable names
	// at upload time.
	$basename = basename($drequest->getPath());
	$file->makeEphemeral();
	$file->setName($basename);

	return $file->getRedirectResponse();
	}

	$corpus = $this->buildGitLFSCorpus($lfs_ref);
	} else {
	$show_editor = true;

	$ref = id(new PhabricatorDocumentRef())
	->setFile($file);

	$engine = id(new DiffusionDocumentRenderingEngine())
	->setRequest($request)
	->setDiffusionRequest($drequest);

	$corpus = $engine->newDocumentView($ref);

	$this->corpusButtons[] = $this->renderFileButton();
	}
	}

	$bar = $this->buildButtonBar($drequest, $show_editor);
	$header = $this->buildHeaderView($drequest);
	$header->setHeaderIcon('fa-file-code-o');

	$follow = $request->getStr('follow');
	$follow_notice = null;
	if ($follow) {
	$follow_notice = id(new PHUIInfoView())
	->setSeverity(PHUIInfoView::SEVERITY_WARNING)
	->setTitle(pht('Unable to Continue'));
	switch ($follow) {
	case 'first':
	$follow_notice->appendChild(
	pht(
	'Unable to continue tracing the history of this file because '.
	'this commit is the first commit in the repository.'));
	break;
	case 'created':
	$follow_notice->appendChild(
	pht(
	'Unable to continue tracing the history of this file because '.
	'this commit created the file.'));
	break;
	}
	}

	$renamed = $request->getStr('renamed');
	$renamed_notice = null;
	if ($renamed) {
	$renamed_notice = id(new PHUIInfoView())
	->setSeverity(PHUIInfoView::SEVERITY_NOTICE)
	->setTitle(pht('File Renamed'))
	->appendChild(
	pht(
	'File history passes through a rename from "%s" to "%s".',
	$drequest->getPath(),
	$renamed));
	}

	$open_revisions = $this->buildOpenRevisions();
	$owners_list = $this->buildOwnersList($drequest);

	$crumbs = $this->buildCrumbs(
	array(
	'branch' => true,
	'path' => true,
	'view' => 'browse',
	));
	$crumbs->setBorder(true);

	$basename = basename($this->getDiffusionRequest()->getPath());
	$tabs = $this->buildTabsView('code');
	$bar->setRight($this->corpusButtons);

	$view = id(new PHUITwoColumnView())
	->setHeader($header)
	->setTabs($tabs)
	->setFooter(array(
	$bar,
	$follow_notice,
	$renamed_notice,
	$corpus,
	$open_revisions,
	$owners_list,
	));

	$title = array($basename, $repository->getDisplayName());

	return $this->newPage()
	->setTitle($title)
	->setCrumbs($crumbs)
	->appendChild(
	array(
	$view,
	));

	}

	public function browseDirectory(
	DiffusionBrowseResultSet $results,
	PHUIPagerView $pager) {

	$request = $this->getRequest();
	$drequest = $this->getDiffusionRequest();
	$repository = $drequest->getRepository();

	$reason = $results->getReasonForEmptyResultSet();

	$this->buildActionButtons($drequest, true);
	$details = $this->buildPropertyView($drequest);

	$header = $this->buildHeaderView($drequest);
	$header->setHeaderIcon('fa-folder-open');

	$empty_result = null;
	$browse_panel = null;
	if (!$results->isValidResults()) {
	$empty_result = new DiffusionEmptyResultView();
	$empty_result->setDiffusionRequest($drequest);
	$empty_result->setDiffusionBrowseResultSet($results);
	$empty_result->setView($request->getStr('view'));
	} else {
	$phids = array();
	foreach ($results->getPaths() as $result) {
	$data = $result->getLastCommitData();
	if ($data) {
	if ($data->getCommitDetail('authorPHID')) {
	$phids[$data->getCommitDetail('authorPHID')] = true;
	}
	}
	}

	$phids = array_keys($phids);
	$handles = $this->loadViewerHandles($phids);

	$browse_table = id(new DiffusionBrowseTableView())
	->setDiffusionRequest($drequest)
	->setHandles($handles)
	->setPaths($results->getPaths())
	->setUser($request->getUser());

	$title = nonempty(basename($drequest->getPath()), '/');
	$icon = 'fa-folder-open';
	$browse_header = $this->buildPanelHeaderView($title, $icon);

	$browse_panel = id(new PHUIObjectBoxView())
	->setHeader($browse_header)
	->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
	->setTable($browse_table)
	->addClass('diffusion-mobile-view')
	->setPager($pager);
	}

	$open_revisions = $this->buildOpenRevisions();
	$readme = $this->renderDirectoryReadme($results);

	$crumbs = $this->buildCrumbs(
	array(
	'branch' => true,
	'path' => true,
	'view' => 'browse',
	));

	$crumbs->setBorder(true);
	$tabs = $this->buildTabsView('code');
	$owners_list = $this->buildOwnersList($drequest);
	$bar = id(new PHUILeftRightView())
	->setRight($this->corpusButtons)
	->addClass('diffusion-action-bar');

	$view = id(new PHUITwoColumnView())
	->setHeader($header)
	->setTabs($tabs)
	->setFooter(
	array(
	$bar,
	$empty_result,
	$browse_panel,
	$open_revisions,
	$owners_list,
	$readme,
	));

	if ($details) {
	$view->addPropertySection(pht('Details'), $details);
	}

	return $this->newPage()
	->setTitle(array(
	nonempty(basename($drequest->getPath()), '/'),
	$repository->getDisplayName(),
	))
	->setCrumbs($crumbs)
	->appendChild(
	array(
	$view,
	));
	}

	private function renderSearchResults() {
	$request = $this->getRequest();

	$drequest = $this->getDiffusionRequest();
	$repository = $drequest->getRepository();
	$results = array();

	$pager = id(new PHUIPagerView())
	->readFromRequest($request);

	$search_mode = null;
	switch ($repository->getVersionControlSystem()) {
	case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
	$results = array();
	break;
	default:
	if (strlen($this->getRequest()->getStr('grep'))) {
	$search_mode = 'grep';
	$query_string = $request->getStr('grep');
	$results = $this->callConduitWithDiffusionRequest(
	'diffusion.searchquery',
	array(
	'grep' => $query_string,
	'commit' => $drequest->getStableCommit(),
	'path' => $drequest->getPath(),
	'limit' => $pager->getPageSize() + 1,
	'offset' => $pager->getOffset(),
	));
	}
	break;
	}
	$results = $pager->sliceResults($results);

	$table = null;
	$header = null;
	if ($search_mode == 'grep') {
	$table = $this->renderGrepResults($results, $query_string);
	$title = pht(
	'File content matching "%s" under "%s"',
	$query_string,
	nonempty($drequest->getPath(), '/'));
	$header = id(new PHUIHeaderView())
	->setHeader($title)
	->addClass('diffusion-search-result-header');
	}

	return array($header, $table, $pager);

	}

	private function renderGrepResults(array $results, $pattern) {
	$drequest = $this->getDiffusionRequest();
	require_celerity_resource('phabricator-search-results-css');

	if (!$results) {
	return id(new PHUIInfoView())
	->setSeverity(PHUIInfoView::SEVERITY_NODATA)
	->appendChild(
	pht(
	'The pattern you searched for was not found in the content of any '.
	'files.'));
	}

	$grouped = array();
	foreach ($results as $file) {
	list($path, $line, $string) = $file;
	$grouped[$path][] = array($line, $string);
	}

	$view = array();
	foreach ($grouped as $path => $matches) {
	$view[] = id(new DiffusionPatternSearchView())
	->setPath($path)
	->setMatches($matches)
	->setPattern($pattern)
	->setDiffusionRequest($drequest)
	->render();
	}

	return $view;
	}

	private function buildButtonBar(
	DiffusionRequest $drequest,
	$show_editor) {

	$viewer = $this->getViewer();
	$base_uri = $this->getRequest()->getRequestURI();

	$repository = $drequest->getRepository();
	$path = $drequest->getPath();
	$line = nonempty((int)$drequest->getLine(), 1);
	$buttons = array();

	$editor_uri = null;
	$editor_template = null;

	$link_engine = PhabricatorEditorURIEngine::newForViewer($viewer);
	if ($link_engine) {
	$link_engine->setRepository($repository);

	$editor_uri = $link_engine->getURIForPath($path, $line);
	$editor_template = $link_engine->getURITokensForPath($path);
	}

	$buttons[] =
	id(new PHUIButtonView())
	->setTag('a')
	->setText(pht('Last Change'))
	->setColor(PHUIButtonView::GREY)
	->setHref(
	$drequest->generateURI(
	array(
	'action' => 'change',
	)))
	->setIcon('fa-backward');

	if ($editor_uri) {
	$buttons[] =
	id(new PHUIButtonView())
	->setTag('a')
	->setText(pht('Open File'))
	->setHref($editor_uri)
	->setIcon('fa-pencil')
	->setID('editor_link')
	->setMetadata(array('template' => $editor_template))
	->setDisabled(!$editor_uri)
	->setColor(PHUIButtonView::GREY);
	}

	$bar = id(new PHUILeftRightView())
	->setLeft($buttons)
	->addClass('diffusion-action-bar full-mobile-buttons');
	return $bar;
	}

	private function buildOwnersList(DiffusionRequest $drequest) {
	$viewer = $this->getViewer();

	$have_owners = PhabricatorApplication::isClassInstalledForViewer(
	'PhabricatorOwnersApplication',
	$viewer);
	if (!$have_owners) {
	return null;
	}

	$repository = $drequest->getRepository();

	$package_query = id(new PhabricatorOwnersPackageQuery())
	->setViewer($viewer)
	->withStatuses(array(PhabricatorOwnersPackage::STATUS_ACTIVE))
	->withControl(
	$repository->getPHID(),
	array(
	$drequest->getPath(),
	));

	$package_query->execute();

	$packages = $package_query->getControllingPackagesForPath(
	$repository->getPHID(),
	$drequest->getPath());

	$ownership = id(new PHUIObjectItemListView())
	->setUser($viewer)
	->setNoDataString(pht('No Owners'));

	if ($packages) {
	foreach ($packages as $package) {
	$item = id(new PHUIObjectItemView())
	->setObject($package)
	->setObjectName($package->getMonogram())
	->setHeader($package->getName())
	->setHref($package->getURI());

	$owners = $package->getOwners();
	if ($owners) {
	$owner_list = $viewer->renderHandleList(
	mpull($owners, 'getUserPHID'));
	} else {
	$owner_list = phutil_tag('em', array(), pht('None'));
	}
	$item->addAttribute(pht('Owners: %s', $owner_list));

	$auto = $package->getAutoReview();
	$autoreview_map = PhabricatorOwnersPackage::getAutoreviewOptionsMap();
	$spec = idx($autoreview_map, $auto, array());
	$name = idx($spec, 'name', $auto);
	$item->addIcon('fa-code', $name);

	$rule = $package->newAuditingRule();
	$item->addIcon($rule->getIconIcon(), $rule->getDisplayName());

	if ($package->isArchived()) {
	$item->setDisabled(true);
	}

	$ownership->addItem($item);
	}
	}

	$view = id(new PHUIObjectBoxView())
	->setHeaderText(pht('Owner Packages'))
	->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
	->addClass('diffusion-mobile-view')
	->setObjectList($ownership);

	return $view;
	}

	private function renderFileButton($file_uri = null, $label = null) {

	$base_uri = $this->getRequest()->getRequestURI();

	if ($file_uri) {
	$text = pht('Download File');
	$href = $file_uri;
	$icon = 'fa-download';
	} else {
	$text = pht('Raw File');
	$href = $base_uri->alter('view', 'raw');
	$icon = 'fa-file-text';
	}

	if ($label !== null) {
	$text = $label;
	}

	$button = id(new PHUIButtonView())
	->setTag('a')
	->setText($text)
	->setHref($href)
	->setIcon($icon)
	->setColor(PHUIButtonView::GREY);

	return $button;
	}

	private function renderGitLFSButton() {
	$viewer = $this->getViewer();

	$uri = $this->getRequest()->getRequestURI();
	$href = $uri->alter('view', 'git-lfs');

	$text = pht('Download from Git LFS');
	$icon = 'fa-download';

	return id(new PHUIButtonView())
	->setTag('a')
	->setText($text)
	->setHref($href)
	->setIcon($icon)
	->setColor(PHUIButtonView::GREY);
	}

	private function buildErrorCorpus($message) {
	$text = id(new PHUIBoxView())
	->addPadding(PHUI::PADDING_LARGE)
	->appendChild($message);

	$header = id(new PHUIHeaderView())
	->setHeader(pht('Details'));

	$box = id(new PHUIObjectBoxView())
	->setHeader($header)
	->appendChild($text);

	return $box;
	}

	private function buildBeforeResponse($before) {
	$request = $this->getRequest();
	$drequest = $this->getDiffusionRequest();

	// NOTE: We need to get the grandparent so we can capture filename changes
	// in the parent.

	$parent = $this->loadParentCommitOf($before);
	$old_filename = null;
	$was_created = false;
	if ($parent) {
	$grandparent = $this->loadParentCommitOf($parent);

	if ($grandparent) {
	$rename_query = new DiffusionRenameHistoryQuery();
	$rename_query->setRequest($drequest);
	$rename_query->setOldCommit($grandparent);
	$rename_query->setViewer($request->getUser());
	$old_filename = $rename_query->loadOldFilename();
	$was_created = $rename_query->getWasCreated();
	}
	}

	$follow = null;
	if ($was_created) {
	// If the file was created in history, that means older commits won't
	// have it. Since we know it existed at 'before', it must have been
	// created then; jump there.
	$target_commit = $before;
	$follow = 'created';
	} else if ($parent) {
	// If we found a parent, jump to it. This is the normal case.
	$target_commit = $parent;
	} else {
	// If there's no parent, this was probably created in the initial commit?
	// And the "was_created" check will fail because we can't identify the
	// grandparent. Keep the user at 'before'.
	$target_commit = $before;
	$follow = 'first';
	}

	$path = $drequest->getPath();
	$renamed = null;
	if ($old_filename !== null &&
	$old_filename !== '/'.$path) {
	$renamed = $path;
	$path = $old_filename;
	}

	$line = null;
	// If there's a follow error, drop the line so the user sees the message.
	if (!$follow) {
	$line = $this->getBeforeLineNumber($target_commit);
	}

	$before_uri = $drequest->generateURI(
	array(
	'action' => 'browse',
	'commit' => $target_commit,
	'line' => $line,
	'path' => $path,
	));

	if ($renamed === null) {
	$before_uri->removeQueryParam('renamed');
	} else {
	$before_uri->replaceQueryParam('renamed', $renamed);
	}

	if ($follow === null) {
	$before_uri->removeQueryParam('follow');
	} else {
	$before_uri->replaceQueryParam('follow', $follow);
	}

	return id(new AphrontRedirectResponse())->setURI($before_uri);
	}

	private function getBeforeLineNumber($target_commit) {
	$drequest = $this->getDiffusionRequest();
	$viewer = $this->getViewer();

	$line = $drequest->getLine();
	if (!$line) {
	return null;
	}

	$diff_info = $this->callConduitWithDiffusionRequest(
	'diffusion.rawdiffquery',
	array(
	'commit' => $drequest->getCommit(),
	'path' => $drequest->getPath(),
	'againstCommit' => $target_commit,
	));

	$file_phid = $diff_info['filePHID'];
	$file = id(new PhabricatorFileQuery())
	->setViewer($viewer)
	->withPHIDs(array($file_phid))
	->executeOne();
	if (!$file) {
	throw new Exception(
	pht(
	'Failed to load file ("%s") returned by "%s".',
	$file_phid,
	'diffusion.rawdiffquery.'));
	}

	$raw_diff = $file->loadFileData();

	$old_line = 0;
	$new_line = 0;

	foreach (explode("\n", $raw_diff) as $text) {
	if ($text[0] == '-' \|\| $text[0] == ' ') {
	$old_line++;
	}
	if ($text[0] == '+' \|\| $text[0] == ' ') {
	$new_line++;
	}
	if ($new_line == $line) {
	return $old_line;
	}
	}

	// We didn't find the target line.
	return $line;
	}

	private function loadParentCommitOf($commit) {
	$drequest = $this->getDiffusionRequest();
	$user = $this->getRequest()->getUser();

	$before_req = DiffusionRequest::newFromDictionary(
	array(
	'user' => $user,
	'repository' => $drequest->getRepository(),
	'commit' => $commit,
	));

	$parents = DiffusionQuery::callConduitWithDiffusionRequest(
	$user,
	$before_req,
	'diffusion.commitparentsquery',
	array(
	'commit' => $commit,
	));

	return head($parents);
	}

	protected function markupText($text) {
	$engine = PhabricatorMarkupEngine::newDiffusionMarkupEngine();
	$engine->setConfig('viewer', $this->getRequest()->getUser());
	$text = $engine->markupText($text);

	$text = phutil_tag(
	'div',
	array(
	'class' => 'phabricator-remarkup',
	),
	$text);

	return $text;
	}

	protected function buildHeaderView(DiffusionRequest $drequest) {
	$viewer = $this->getViewer();
	$repository = $drequest->getRepository();

	$commit_tag = $this->renderCommitHashTag($drequest);

	$path = nonempty($drequest->getPath(), '/');

	$search = $this->renderSearchForm($path);

	$header = id(new PHUIHeaderView())
	->setUser($viewer)
	->setHeader($this->renderPathLinks($drequest, $mode = 'browse'))
	->addActionItem($search)
	->addTag($commit_tag)
	->addClass('diffusion-browse-header');

	if (!$repository->isSVN()) {
	$branch_tag = $this->renderBranchTag($drequest);
	$header->addTag($branch_tag);
	}

	return $header;
	}

	protected function buildPanelHeaderView($title, $icon) {

	$header = id(new PHUIHeaderView())
	->setHeader($title)
	->setHeaderIcon($icon)
	->addClass('diffusion-panel-header-view');

	return $header;

	}

	protected function buildActionButtons(
	DiffusionRequest $drequest,
	$is_directory = false) {

	$viewer = $this->getViewer();
	$repository = $drequest->getRepository();
	$history_uri = $drequest->generateURI(array('action' => 'history'));
	$behind_head = $drequest->getSymbolicCommit();
	$compare = null;
	$head_uri = $drequest->generateURI(
	array(
	'commit' => '',
	'action' => 'browse',
	));

	if ($repository->supportsBranchComparison() && $is_directory) {
	$compare_uri = $drequest->generateURI(array('action' => 'compare'));
	$compare = id(new PHUIButtonView())
	->setText(pht('Compare'))
	->setIcon('fa-code-fork')
	->setWorkflow(true)
	->setTag('a')
	->setHref($compare_uri)
	->setColor(PHUIButtonView::GREY);
	$this->corpusButtons[] = $compare;
	}

	$head = null;
	if ($behind_head) {
	$head = id(new PHUIButtonView())
	->setTag('a')
	->setText(pht('Back to HEAD'))
	->setHref($head_uri)
	->setIcon('fa-home')
	->setColor(PHUIButtonView::GREY);
	$this->corpusButtons[] = $head;
	}

	$history = id(new PHUIButtonView())
	->setText(pht('History'))
	->setHref($history_uri)
	->setTag('a')
	->setIcon('fa-history')
	->setColor(PHUIButtonView::GREY);
	$this->corpusButtons[] = $history;

	}

	protected function buildPropertyView(
	DiffusionRequest $drequest) {

	$viewer = $this->getViewer();
	$view = id(new PHUIPropertyListView())
	->setUser($viewer);

	if ($drequest->getSymbolicType() == 'tag') {
	$symbolic = $drequest->getSymbolicCommit();
	$view->addProperty(pht('Tag'), $symbolic);

	$tags = $this->callConduitWithDiffusionRequest(
	'diffusion.tagsquery',
	array(
	'names' => array($symbolic),
	'needMessages' => true,
	));
	$tags = DiffusionRepositoryTag::newFromConduit($tags);

	$tags = mpull($tags, null, 'getName');
	$tag = idx($tags, $symbolic);

	if ($tag && strlen($tag->getMessage())) {
	$view->addSectionHeader(
	pht('Tag Content'), 'fa-tag');
	$view->addTextContent($this->markupText($tag->getMessage()));
	}
	}

	if ($view->hasAnyProperties()) {
	return $view;
	}

	return null;
	}

	private function buildOpenRevisions() {
	$viewer = $this->getViewer();

	$drequest = $this->getDiffusionRequest();
	$repository = $drequest->getRepository();
	$path = $drequest->getPath();

	- $path_map = id(new DiffusionPathIDQuery(array($path)))->loadPathIDs();
	- $path_id = idx($path_map, $path);
	- if (!$path_id) {
	- return null;
	- }
	-
	$recent = (PhabricatorTime::getNow() - phutil_units('30 days in seconds'));

	$revisions = id(new DifferentialRevisionQuery())
	->setViewer($viewer)
	- ->withPath($repository->getID(), $path_id)
	+ ->withPaths(array($path))
	+ ->withRepositoryPHIDs(array($repository->getPHID()))
	->withIsOpen(true)
	->withUpdatedEpochBetween($recent, null)
	->setOrder(DifferentialRevisionQuery::ORDER_MODIFIED)
	->setLimit(10)
	->needReviewers(true)
	->needFlags(true)
	->needDrafts(true)
	->execute();

	if (!$revisions) {
	return null;
	}

	$header = id(new PHUIHeaderView())
	->setHeader(pht('Recent Open Revisions'));

	$list = id(new DifferentialRevisionListView())
	->setViewer($viewer)
	->setRevisions($revisions)
	->setNoBox(true);

	$view = id(new PHUIObjectBoxView())
	->setHeader($header)
	->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
	->addClass('diffusion-mobile-view')
	->appendChild($list);

	return $view;
	}

	private function getGitLFSRef(PhabricatorRepository $repository, $data) {
	if (!$repository->canUseGitLFS()) {
	return null;
	}

	$lfs_pattern = '(^version https://git-lfs\\.github\\.com/spec/v1[\r\n])';
	if (!preg_match($lfs_pattern, $data)) {
	return null;
	}

	$matches = null;
	if (!preg_match('(^oid sha256:(.*)$)m', $data, $matches)) {
	return null;
	}

	$hash = $matches[1];
	$hash = trim($hash);

	return id(new PhabricatorRepositoryGitLFSRefQuery())
	->setViewer($this->getViewer())
	->withRepositoryPHIDs(array($repository->getPHID()))
	->withObjectHashes(array($hash))
	->executeOne();
	}

	private function buildGitLFSCorpus(PhabricatorRepositoryGitLFSRef $ref) {
	// TODO: We should probably test if we can load the file PHID here and
	// show the user an error if we can't, rather than making them click
	// through to hit an error.

	$title = basename($this->getDiffusionRequest()->getPath());
	$icon = 'fa-archive';
	$drequest = $this->getDiffusionRequest();
	$this->buildActionButtons($drequest);
	$header = $this->buildPanelHeaderView($title, $icon);

	$severity = PHUIInfoView::SEVERITY_NOTICE;

	$messages = array();
	$messages[] = pht(
	'This %s file is stored in Git Large File Storage.',
	phutil_format_bytes($ref->getByteSize()));

	try {
	$file = $this->loadGitLFSFile($ref);
	$this->corpusButtons[] = $this->renderGitLFSButton();
	} catch (Exception $ex) {
	$severity = PHUIInfoView::SEVERITY_ERROR;
	$messages[] = pht('The data for this file could not be loaded.');
	}

	$this->corpusButtons[] = $this->renderFileButton(
	null, pht('View Raw LFS Pointer'));

	$corpus = id(new PHUIObjectBoxView())
	->setHeader($header)
	->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
	->addClass('diffusion-mobile-view')
	->setCollapsed(true);

	if ($messages) {
	$corpus->setInfoView(
	id(new PHUIInfoView())
	->setSeverity($severity)
	->setErrors($messages));
	}

	return $corpus;
	}

	private function loadGitLFSFile(PhabricatorRepositoryGitLFSRef $ref) {
	$viewer = $this->getViewer();

	$file = id(new PhabricatorFileQuery())
	->setViewer($viewer)
	->withPHIDs(array($ref->getFilePHID()))
	->executeOne();
	if (!$file) {
	throw new Exception(
	pht(
	'Failed to load file object for Git LFS ref "%s"!',
	$ref->getObjectHash()));
	}

	return $file;
	}

	}

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