Add very basic tag support to Diffusion

Summary: Lists the 25 most recent tags on the "Repository" page.

Test Plan: Looked at a git repository with a tag, saw it. Looked at HG/SVN repos, they didn't break.

Reviewers: davidreuss, 20after4, btrahan, vrana, jungejason

Reviewed By: davidreuss

CC: aran

Maniphest Tasks: T1130

Differential Revision: https://secure.phabricator.com/D2255

src/__phutil_library_map__.php

@@ -321,6 +321,7 @@ phutil_register_library_map(array(
     'DiffusionGitLastModifiedQuery' => 'applications/diffusion/query/lastmodified/git',
     'DiffusionGitMergedCommitsQuery' => 'applications/diffusion/query/mergedcommits/git',
     'DiffusionGitRequest' => 'applications/diffusion/request/git',
+    'DiffusionGitTagListQuery' => 'applications/diffusion/query/taglist/git',
     'DiffusionHistoryController' => 'applications/diffusion/controller/history',
     'DiffusionHistoryQuery' => 'applications/diffusion/query/history/base',
     'DiffusionHistoryTableView' => 'applications/diffusion/view/historytable',
@@ -338,6 +339,7 @@ phutil_register_library_map(array(
     'DiffusionMercurialLastModifiedQuery' => 'applications/diffusion/query/lastmodified/mercurial',
     'DiffusionMercurialMergedCommitsQuery' => 'applications/diffusion/query/mergedcommits/mercurial',
     'DiffusionMercurialRequest' => 'applications/diffusion/request/mercurial',
+    'DiffusionMercurialTagListQuery' => 'applications/diffusion/query/taglist/mercurial',
     'DiffusionMergedCommitsQuery' => 'applications/diffusion/query/mergedcommits/base',
     'DiffusionPathChange' => 'applications/diffusion/data/pathchange',
     'DiffusionPathChangeQuery' => 'applications/diffusion/query/pathchange/base',
@@ -349,6 +351,7 @@ phutil_register_library_map(array(
     'DiffusionQuery' => 'applications/diffusion/query/base',
     'DiffusionRepositoryController' => 'applications/diffusion/controller/repository',
     'DiffusionRepositoryPath' => 'applications/diffusion/data/repositorypath',
+    'DiffusionRepositoryTag' => 'applications/diffusion/tag',
     'DiffusionRequest' => 'applications/diffusion/request/base',
     'DiffusionSvnBrowseQuery' => 'applications/diffusion/query/browse/svn',
     'DiffusionSvnCommitParentsQuery' => 'applications/diffusion/query/parents/svn',
@@ -359,8 +362,11 @@ phutil_register_library_map(array(
     'DiffusionSvnLastModifiedQuery' => 'applications/diffusion/query/lastmodified/svn',
     'DiffusionSvnMergedCommitsQuery' => 'applications/diffusion/query/mergedcommits/svn',
     'DiffusionSvnRequest' => 'applications/diffusion/request/svn',
+    'DiffusionSvnTagListQuery' => 'applications/diffusion/query/taglist/svn',
     'DiffusionSymbolController' => 'applications/diffusion/controller/symbol',
     'DiffusionSymbolQuery' => 'applications/diffusion/query/symbol',
+    'DiffusionTagListQuery' => 'applications/diffusion/query/taglist/base',
+    'DiffusionTagListView' => 'applications/diffusion/view/taglist',
     'DiffusionURITestCase' => 'applications/diffusion/request/base/__tests__',
     'DiffusionView' => 'applications/diffusion/view/base',
     'DrydockAllocator' => 'applications/drydock/allocator/resource',
@@ -1273,6 +1279,7 @@ phutil_register_library_map(array(
     'DiffusionGitLastModifiedQuery' => 'DiffusionLastModifiedQuery',
     'DiffusionGitMergedCommitsQuery' => 'DiffusionMergedCommitsQuery',
     'DiffusionGitRequest' => 'DiffusionRequest',
+    'DiffusionGitTagListQuery' => 'DiffusionTagListQuery',
     'DiffusionHistoryController' => 'DiffusionController',
     'DiffusionHistoryQuery' => 'DiffusionQuery',
     'DiffusionHistoryTableView' => 'DiffusionView',
@@ -1290,6 +1297,7 @@ phutil_register_library_map(array(
     'DiffusionMercurialLastModifiedQuery' => 'DiffusionLastModifiedQuery',
     'DiffusionMercurialMergedCommitsQuery' => 'DiffusionMergedCommitsQuery',
     'DiffusionMercurialRequest' => 'DiffusionRequest',
+    'DiffusionMercurialTagListQuery' => 'DiffusionTagListQuery',
     'DiffusionMergedCommitsQuery' => 'DiffusionQuery',
     'DiffusionPathCompleteController' => 'DiffusionController',
     'DiffusionPathQueryTestCase' => 'PhabricatorTestCase',
@@ -1304,7 +1312,10 @@ phutil_register_library_map(array(
     'DiffusionSvnLastModifiedQuery' => 'DiffusionLastModifiedQuery',
     'DiffusionSvnMergedCommitsQuery' => 'DiffusionMergedCommitsQuery',
     'DiffusionSvnRequest' => 'DiffusionRequest',
+    'DiffusionSvnTagListQuery' => 'DiffusionTagListQuery',
     'DiffusionSymbolController' => 'DiffusionController',
+    'DiffusionTagListQuery' => 'DiffusionQuery',
+    'DiffusionTagListView' => 'DiffusionView',
     'DiffusionURITestCase' => 'ArcanistPhutilTestCase',
     'DiffusionView' => 'AphrontView',
     'DrydockAllocatorWorker' => 'PhabricatorWorker',

src/applications/diffusion/controller/repository/DiffusionRepositoryController.php

@@ -93,6 +93,8 @@ final class DiffusionRepositoryController extends DiffusionController {
 
     $content[] = $browse_panel;
 
+    $content[] = $this->buildTagListTable($drequest);
+
     if ($drequest->getBranch() !== null) {
       $branch_query = DiffusionBranchQuery::newFromDiffusionRequest($drequest);
       $branches = $branch_query->loadBranches();
@@ -152,4 +154,37 @@ final class DiffusionRepositoryController extends DiffusionController {
     return $panel;
   }
 
+  private function buildTagListTable(DiffusionRequest $drequest) {
+    $query = DiffusionTagListQuery::newFromDiffusionRequest($drequest);
+    $query->setLimit(25);
+    $tags = $query->loadTags();
+
+    if (!$tags) {
+      return null;
+    }
+
+    $commits = id(new PhabricatorAuditCommitQuery())
+      ->withIdentifiers(
+        $drequest->getRepository()->getID(),
+        mpull($tags, 'getCommitIdentifier'))
+      ->needCommitData(true)
+      ->execute();
+
+    $view = new DiffusionTagListView();
+    $view->setDiffusionRequest($drequest);
+    $view->setTags($tags);
+    $view->setUser($this->getRequest()->getUser());
+    $view->setCommits($commits);
+
+    $phids = $view->getRequiredHandlePHIDs();
+    $handles = id(new PhabricatorObjectHandleData($phids))->loadHandles();
+    $view->setHandles($handles);
+
+    $panel = new AphrontPanelView();
+    $panel->setHeader('Tags');
+    $panel->appendChild($view);
+
+    return $panel;
+  }
+
 }

src/applications/diffusion/controller/repository/__init__.php

@@ -6,13 +6,16 @@
 
 
 
+phutil_require_module('phabricator', 'applications/audit/query/commit');
 phutil_require_module('phabricator', 'applications/diffusion/controller/base');
 phutil_require_module('phabricator', 'applications/diffusion/query/branch/base');
 phutil_require_module('phabricator', 'applications/diffusion/query/browse/base');
 phutil_require_module('phabricator', 'applications/diffusion/query/history/base');
+phutil_require_module('phabricator', 'applications/diffusion/query/taglist/base');
 phutil_require_module('phabricator', 'applications/diffusion/view/branchtable');
 phutil_require_module('phabricator', 'applications/diffusion/view/browsetable');
 phutil_require_module('phabricator', 'applications/diffusion/view/historytable');
+phutil_require_module('phabricator', 'applications/diffusion/view/taglist');
 phutil_require_module('phabricator', 'applications/phid/handle/data');
 phutil_require_module('phabricator', 'applications/repository/constants/repositorytype');
 phutil_require_module('phabricator', 'view/control/table');

src/applications/diffusion/query/taglist/base/DiffusionTagListQuery.php

@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class DiffusionTagListQuery extends DiffusionQuery {
+
+  private $limit;
+
+  public function setLimit($limit) {
+    $this->limit = $limit;
+    return $this;
+  }
+
+  protected function getLimit() {
+    return $this->limit;
+  }
+
+  final public static function newFromDiffusionRequest(
+    DiffusionRequest $request) {
+    return self::newQueryObject(__CLASS__, $request);
+  }
+
+  final public function loadTags() {
+    return $this->executeQuery();
+  }
+
+}

src/applications/diffusion/query/taglist/base/__init__.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/diffusion/query/base');
+
+
+phutil_require_source('DiffusionTagListQuery.php');

src/applications/diffusion/query/taglist/git/DiffusionGitTagListQuery.php

@@ -0,0 +1,73 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class DiffusionGitTagListQuery extends DiffusionTagListQuery {
+
+  protected function executeQuery() {
+    $drequest = $this->getRequest();
+    $repository = $drequest->getRepository();
+
+    $limit = $this->getLimit();
+
+    list($stdout) = $repository->execxLocalCommand(
+      'for-each-ref %C --sort=-creatordate --format=%s refs/tags',
+      $limit ? '--count='.(int)$limit : null,
+      '%(objectname) %(objecttype) %(refname) %(*objectname) %(*objecttype) '.
+        '%(subject)%01%(creator)'
+    );
+
+    $stdout = trim($stdout);
+    if (!strlen($stdout)) {
+      return array();
+    }
+
+    $tags = array();
+    foreach (explode("\n", $stdout) as $line) {
+      list($info, $creator) = explode("\1", $line);
+      list(
+        $objectname,
+        $objecttype,
+        $refname,
+        $refobjectname,
+        $refobjecttype,
+        $description) = explode(' ', $info, 6);
+
+      $matches = null;
+      if (!preg_match('/^(.*) ([0-9]+) ([0-9+-]+)$/', $creator, $matches)) {
+        throw new Exception(
+          "Unparseable output from 'git for-each-ref': {$line}");
+      }
+
+      $author = $matches[1];
+      $epoch  = $matches[2];
+
+      $tag = new DiffusionRepositoryTag();
+      $tag->setAuthor($author);
+      $tag->setEpoch($epoch);
+      $tag->setCommitIdentifier(nonempty($refobjectname, $objectname));
+      $tag->setName(preg_replace('@^refs/tags/@', '', $refname));
+      $tag->setDescription($description);
+      $tag->setType('git/'.$objecttype);
+
+      $tags[] = $tag;
+    }
+
+    return $tags;
+  }
+
+}

src/applications/diffusion/query/taglist/git/__init__.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/diffusion/query/taglist/base');
+phutil_require_module('phabricator', 'applications/diffusion/tag');
+
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('DiffusionGitTagListQuery.php');

src/applications/diffusion/query/taglist/mercurial/DiffusionMercurialTagListQuery.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class DiffusionMercurialTagListQuery extends DiffusionTagListQuery {
+
+  protected function executeQuery() {
+    // TODO: Implement this for Mercurial.
+    return array();
+  }
+
+}

src/applications/diffusion/query/taglist/mercurial/__init__.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/diffusion/query/taglist/base');
+
+
+phutil_require_source('DiffusionMercurialTagListQuery.php');

src/applications/diffusion/query/taglist/svn/DiffusionSvnTagListQuery.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class DiffusionSvnTagListQuery extends DiffusionTagListQuery {
+
+  protected function executeQuery() {
+    // Nothing meaningful to be done in Subversion.
+    return array();
+  }
+
+}

src/applications/diffusion/query/taglist/svn/__init__.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/diffusion/query/taglist/base');
+
+
+phutil_require_source('DiffusionSvnTagListQuery.php');

src/applications/diffusion/tag/DiffusionRepositoryTag.php

@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class DiffusionRepositoryTag {
+
+  private $author;
+  private $epoch;
+  private $commitIdentifier;
+  private $name;
+  private $description;
+  private $type;
+
+  public function setType($type) {
+    $this->type = $type;
+    return $this;
+  }
+
+  public function getType() {
+    return $this->type;
+  }
+
+  public function setDescription($description) {
+    $this->description = $description;
+    return $this;
+  }
+
+  public function getDescription() {
+    return $this->description;
+  }
+
+  public function setName($name) {
+    $this->name = $name;
+    return $this;
+  }
+
+  public function getName() {
+    return $this->name;
+  }
+
+  public function setCommitIdentifier($commit_identifier) {
+    $this->commitIdentifier = $commit_identifier;
+    return $this;
+  }
+
+  public function getCommitIdentifier() {
+    return $this->commitIdentifier;
+  }
+
+  public function setEpoch($epoch) {
+    $this->epoch = $epoch;
+    return $this;
+  }
+
+  public function getEpoch() {
+    return $this->epoch;
+  }
+
+  public function setAuthor($author) {
+    $this->author = $author;
+    return $this;
+  }
+
+  public function getAuthor() {
+    return $this->author;
+  }
+
+}

src/applications/diffusion/tag/__init__.php

@@ -0,0 +1,10 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+
+phutil_require_source('DiffusionRepositoryTag.php');

src/applications/diffusion/view/branchtable/DiffusionBranchTableView.php

@@ -39,7 +39,7 @@ final class DiffusionBranchTableView extends DiffusionView {
           array(
             'href' => $drequest->generateURI(
               array(
-                'action' => 'branch',
+                'action' => 'browse',
                 'branch' => $branch->getName(),
               )),
           ),
@@ -64,6 +64,7 @@ final class DiffusionBranchTableView extends DiffusionView {
       ));
     $view->setColumnClasses(
       array(
+        'pri',
         'wide',
       ));
     $view->setRowClasses($rowc);

src/applications/diffusion/view/taglist/DiffusionTagListView.php

@@ -0,0 +1,134 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class DiffusionTagListView extends DiffusionView {
+
+  private $tags;
+  private $user;
+  private $commits = array();
+  private $handles = array();
+
+  public function setUser($user) {
+    $this->user = $user;
+    return $this;
+  }
+
+  public function setTags($tags) {
+    $this->tags = $tags;
+    return $this;
+  }
+
+  public function setCommits(array $commits) {
+    $this->commits = mpull($commits, null, 'getCommitIdentifier');
+    return $this;
+  }
+
+  public function setHandles(array $handles) {
+    $this->handles = $handles;
+    return $this;
+  }
+
+  public function getRequiredHandlePHIDs() {
+    return array_filter(mpull($this->commits, 'getAuthorPHID'));
+  }
+
+  public function render() {
+    $drequest = $this->getDiffusionRequest();
+    $repository = $drequest->getRepository();
+
+
+    $rows = array();
+    foreach ($this->tags as $tag) {
+      $commit = idx($this->commits, $tag->getCommitIdentifier());
+
+      $tag_link = phutil_render_tag(
+        'a',
+        array(
+          'href' => $drequest->generateURI(
+            array(
+              'action' => 'browse',
+              'commit' => $tag->getCommitIdentifier(),
+            )),
+        ),
+        phutil_escape_html($tag->getName()));
+
+      $commit_link = phutil_render_tag(
+        'a',
+        array(
+          'href' => $drequest->generateURI(
+            array(
+              'action' => 'commit',
+              'commit' => $tag->getCommitIdentifier(),
+            )),
+        ),
+        phutil_escape_html(
+          $repository->formatCommitName(
+            $tag->getCommitIdentifier())));
+
+      $author = null;
+      if ($commit && $commit->getAuthorPHID()) {
+        $author = $this->handles[$commit->getAuthorPHID()]->renderLink();
+      } else if ($commit && $commit->getCommitData()) {
+        $author = phutil_escape_html($commit->getCommitData()->getAuthorName());
+      } else {
+        $author = phutil_escape_html($tag->getAuthor());
+      }
+
+      $description = null;
+      if ($tag->getType() == 'git/tag') {
+        // In Git, a tag may be a "real" tag, or just a reference to a commit.
+        // If it's a real tag, use the message on the tag, since this may be
+        // unique data which isn't otherwise available.
+        $description = $tag->getDescription();
+      } else {
+        if ($commit && $commit->getCommitData()) {
+          $description = $commit->getCommitData()->getSummary();
+        } else {
+          $description = $tag->getDescription();
+        }
+      }
+      $description = phutil_escape_html($description);
+
+      $rows[] = array(
+        $tag_link,
+        $commit_link,
+        $description,
+        $author,
+        phabricator_datetime($tag->getEpoch(), $this->user),
+      );
+    }
+
+    $table = new AphrontTableView($rows);
+    $table->setHeaders(
+      array(
+        'Tag',
+        'Commit',
+        'Description',
+        'Author',
+        'Created',
+      ));
+    $table->setColumnClasses(
+      array(
+        'pri',
+        '',
+        'wide',
+      ));
+    return $table->render();
+  }
+
+}

src/applications/diffusion/view/taglist/__init__.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/diffusion/view/base');
+phutil_require_module('phabricator', 'view/control/table');
+phutil_require_module('phabricator', 'view/utils');
+
+phutil_require_module('phutil', 'markup');
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('DiffusionTagListView.php');

src/applications/phid/handle/data/PhabricatorObjectHandleData.php

@@ -265,22 +265,9 @@ final class PhabricatorObjectHandleData {
               // In case where the repository for the commit was deleted,
               // we don't have have info about the repository anymore.
               if ($repository) {
-                $vcs = $repository->getVersionControlSystem();
-
-                $type_git = PhabricatorRepositoryType::REPOSITORY_TYPE_GIT;
-                $type_hg = PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL;
-
-                $is_git = ($vcs == $type_git);
-                $is_hg = ($vcs == $type_hg);
-                if ($is_git || $is_hg) {
-                  $short_identifier = substr($commit_identifier, 0, 12);
-                } else {
-                  $short_identifier = $commit_identifier;
-                }
-
-                $handle->setName('r'.$callsign.$short_identifier);
+                $name = $repository->formatCommitName($commit_identifier);
+                $handle->setName($name);
               } else {
-
                 $handle->setName('Commit '.'r'.$callsign.$commit_identifier);
               }
 

src/applications/phid/handle/data/__init__.php

@@ -16,7 +16,6 @@ phutil_require_module('phabricator', 'applications/phid/handle');
 phutil_require_module('phabricator', 'applications/phid/handle/const/status');
 phutil_require_module('phabricator', 'applications/phid/utils');
 phutil_require_module('phabricator', 'applications/phriction/storage/document');
-phutil_require_module('phabricator', 'applications/repository/constants/repositorytype');
 phutil_require_module('phabricator', 'applications/repository/storage/repository');
 phutil_require_module('phabricator', 'infrastructure/env');
 phutil_require_module('phabricator', 'storage/queryfx');

src/applications/repository/storage/repository/PhabricatorRepository.php

@@ -358,4 +358,21 @@ final class PhabricatorRepository extends PhabricatorRepositoryDAO {
     return true;
   }
 
+  public function formatCommitName($commit_identifier) {
+    $vcs = $this->getVersionControlSystem();
+
+    $type_git = PhabricatorRepositoryType::REPOSITORY_TYPE_GIT;
+    $type_hg = PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL;
+
+    $is_git = ($vcs == $type_git);
+    $is_hg = ($vcs == $type_hg);
+    if ($is_git || $is_hg) {
+      $short_identifier = substr($commit_identifier, 0, 12);
+    } else {
+      $short_identifier = $commit_identifier;
+    }
+
+    return 'r'.$this->getCallsign().$short_identifier;
+  }
+
 }

src/view/utils/viewutils.php

@@ -57,7 +57,7 @@ function phabricator_time($epoch, $user) {
     'g:i A');
 }
 
-function phabricator_datetime($epoch, $user) {
+  function phabricator_datetime($epoch, $user) {
   return phabricator_format_local_time(
     $epoch,
     $user,
@@ -103,7 +103,16 @@ function phabricator_format_local_time($epoch, $user, $format) {
   // constructor, it ignores it if the date string includes timezone
   // information. Further, it treats epoch timestamps ("@946684800") as having
   // a UTC timezone. Set the timezone explicitly after constructing the object.
-  $date = new DateTime('@'.$epoch);
+  try {
+    $date = new DateTime('@'.$epoch);
+  } catch (Exception $ex) {
+    // NOTE: DateTime throws an empty exception if the format is invalid,
+    // just replace it with a useful one.
+    throw new Exception(
+      "Construction of a DateTime() with epoch '{$epoch}' ".
+      "raised an exception.");
+  }
+
   $date->setTimeZone($zone);
 
   return $date->format($format);