sitewide-tags-prevent-revisions.php

<?php
/*
 * The site wide tags tag that we use on the explore blog 
 * will save revisions into the explore blog - we don't want that since
 * it useless data replication 
 */

add_filter('sitewide_tags_allowed_post_types',function ($post_types){
  $post_types['revision'] = false;
  // var_dump($post_types);
  return $post_types;
}, 100);


if( is_admin() ){
	add_action('admin_init','psu_sitewide_tags_prevent_revision');
}

function psu_sitewide_tags_prevent_revision(){
	if(function_exists('get_sitewide_tags_option')){

		add_filter('wp_revisions_to_keep','psu_sitewide_tags_no_revisions_on_tags_blog',100);
		
		function psu_sitewide_tags_no_revisions_on_tags_blog($num){
			global $blog_id;
			if($blog_id == get_sitewide_tags_option('tags_blog_id')){
				$num = 0;
				// no revisions on the tags blog!
			}
			return $num;
		} // end function 

	} //end function exists

} // end function