Record which cluster host received a push

Summary: Ref T4292. When we write a push log, also log which node received the request.

Test Plan: {F1230467}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T4292

Differential Revision: https://secure.phabricator.com/D15759

src/applications/diffusion/engine/DiffusionCommitHookEngine.php

@@ -1058,8 +1058,16 @@ final class DiffusionCommitHookEngine extends Phobject {
     // up.
     $phid = id(new PhabricatorRepositoryPushLog())->generatePHID();
 
+    $device = AlmanacKeys::getLiveDevice();
+    if ($device) {
+      $device_phid = $device->getPHID();
+    } else {
+      $device_phid = null;
+    }
+
     return PhabricatorRepositoryPushLog::initializeNewLog($this->getViewer())
       ->setPHID($phid)
+      ->setDevicePHID($device_phid)
       ->setRepositoryPHID($this->getRepository()->getPHID())
       ->attachRepository($this->getRepository())
       ->setEpoch(time());