Delete post with all files attached to it

On my site I have multiple authors, who can add/edit/delete custom posts and upload (attach) images to those posts. The problem is – when they delete their posts, attachments stay on the server. So, I would like to get rid of all files attached to the post when it gets deleted. Can anyone share and example how it’s done?

WP does not do this by default since there is no guarantee that attachment isn’t still being used by some other post.

Basic logic would be to hook into delete_post, query for child attachments and run wp_delete_attachment() on each.

I did quick search in plugin repository and came up with tiny plugin that does just that (seems unmaintained so test before use) – Post Data Delete Advanced.