Updater::update

public Updater::update(&$filetransfer, $overrides = array())

public function update(&$filetransfer, $overrides = array()) {
  try {
    // Establish arguments with possible overrides.
    $args = $this->getInstallArgs($overrides);

    // Take a Backup.
    if ($args['make_backup']) {
      $this->makeBackup($filetransfer, $args['install_dir'], $args['backup_dir']);
    }

    if (!$this->name) {
      // This is bad, don't want to delete the install directory.
      throw new UpdaterException(t('Fatal error in update, cowardly refusing to wipe out the install directory.'));
    }

    // Make sure the installation parent directory exists and is writable.
    $this->prepareInstallDirectory($filetransfer, $args['install_dir']);

    if (is_dir($args['install_dir'] . '/' . $this->name)) {
      // Remove the existing installed file.
      $filetransfer->removeDirectory($args['install_dir'] . '/' . $this->name);
    }

    // Copy the directory in place.
    $filetransfer->copyDirectory($this->source, $args['install_dir']);

    // Make sure what we just installed is readable by the web server.
    $this->makeWorldReadable($filetransfer, $args['install_dir'] . '/' . $this->name);

    // Run the updates.
    // @todo Decide if we want to implement this.
    $this->postUpdate();

    // For now, just return a list of links of things to do.
    return $this->postUpdateTasks();
  }
  catch (FileTransferException $e) {
    throw new UpdaterFileTransferException(t('File Transfer failed, reason: @reason', array('@reason' => strtr($e->getMessage(), $e->arguments))));
  }
}