/**
  * Callback triggered on post delete, used to initiate an outbound sync
  *
  * $post_id - (int) the post to delete
  */
 function delete_post_callback($post_id)
 {
     $post = get_post($post_id);
     // Right now CPTs are not supported
     if ($post->post_type != "page" && $post->post_type != "post") {
         return;
     }
     $post = new WordPress_GitHub_Sync_Post($post_id);
     $post->delete();
 }