WordPress filter to set number of revisions based on post type

wp-revision-filter.php

/**
 * minimize unnecessary revision storage (based on post type)
 */
add_filter( 'wp_revisions_to_keep', function ( $nr_revisions, $post ) {
	switch ( $post->post_type ) {
		case 'page': 
		case 'movie': 
		case 'article': 
		case 'story': 
			$nr_revisions = 3;
			break;
		case 'post': 
		default: 
			$nr_revisions = 0;
			break;
	}
	return $nr_revisions;
}, 10, 2 );