news-bundle/src/Resources/contao/classes/News.php
public function generateFeeds()
	{
		$this->import(Automator::class, 'Automator');
		$this->Automator->purgeXmlFiles();

		$objFeed = NewsFeedModel::findAll();

		if ($objFeed !== null)
		{
			while ($objFeed->next())
			{
				$objFeed->feedName = $objFeed->alias ?: 'news' . $objFeed->id;
				$this->generateFiles($objFeed->row());
				$this->log('Generated news feed "' . $objFeed->feedName . '.xml"', __METHOD__, TL_CRON);
			}
		}
	}
public function generateFeeds()
	{
		$this->import(Automator::class, 'Automator');
		$this->Automator->purgeXmlFiles();

		$objFeed = NewsFeedModel::findAll();

		if ($objFeed !== null)
		{
			while ($objFeed->next())
			{
				$objFeed->feedName = $objFeed->alias ?: 'news' . $objFeed->id;
				$this->generateFiles($objFeed->row());
				$this->log('Generated news feed "' . $objFeed->feedName . '.xml"', __METHOD__, TL_CRON);
			}
		}
	}
Delete old files and generate all feeds