private static function parseRevisionIDFromURI($uri)
 {
     $path = id(new PhutilURI($uri))->getPath();
     $matches = null;
     if (preg_match('#^/D(\\d+)$#', $path, $matches)) {
         $id = (int) $matches[1];
         // Make sure the URI is the same as our URI. Basically, we want to ignore
         // commits from other Phabricator installs.
         if ($uri == PhabricatorEnv::getProductionURI('/D' . $id)) {
             return $id;
         }
         $allowed_uris = PhabricatorEnv::getAllowedURIs('/D' . $id);
         foreach ($allowed_uris as $allowed_uri) {
             if ($uri == $allowed_uri) {
                 return $id;
             }
         }
     }
     return null;
 }