Audit - add ability to query by repositories

Summary: Fixes T5862. The Diffusion table uses `id` but all the other infrastructure uses `phid` so just do a quick load of the repositories to get the ids. Long term, we should re-key the table by phid I think.

Test Plan: made a query with a repository and got a proper result set

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5862

Differential Revision: https://secure.phabricator.com/D10245

src/applications/diffusion/query/DiffusionCommitQuery.php

@@ -59,6 +59,25 @@ final class DiffusionCommitQuery
     return $this;
   }
 
+  /**
+   * Look up commits in a specific repository. Prefer
+   * @{method:withRepositoryIDs}; the underyling table is keyed by ID such
+   * that this method requires a separate initial query to map PHID to ID.
+   * Furthermore, this method requires calling @{method:setViewer} in
+   * advance due to the separate query.
+   */
+  public function withRepositoryPHIDs(array $phids) {
+    $repositories = id (new PhabricatorRepositoryQuery())
+      ->setViewer($this->getViewer())
+      ->withPHIDs($phids)
+      ->execute();
+
+    if (!$repositories) {
+      throw new PhabricatorEmptyQueryException();
+    }
+    $this->withRepositoryIDs(mpull($repositories, 'getID'));
+  }
+
   /**
    * If a default repository is provided, ambiguous commit identifiers will
    * be assumed to belong to the default repository.