/*
 * Setup the Index page, main query adjustments
 *
 * If we're viewing the site index get the first 5 posts
 * from the Marquee category (home-slider), ordered
 * by our meta value and ignoring any sticky stuff.
 *
 */
function mnsu_index_query( $query ) {
    if( is_home() && $query->is_main_query() ) {
    	if( isset( $query->query_vars['post_type'] ) && 'tribe_events' == $query->query_vars['post_type'] ) {
    		/**
    		 * Don't do anything. We have to add this additonal check to avoid applying the query
    		 * modification to The Events Calendar listing pages as they set is_home() to true.
    		 */
    	} else {
			// Set paging to 5
			$query->set( 'posts_per_page', '5' );
			$query->set( 'ignore_sticky_posts', 1 );
			// Get posts from the Marquee category
			$tax_query = array (
				array(
					'taxonomy' => 'placements',
					'terms' => array( 'home-slider' ),
					'field' => 'slug',
				)
			);
			$query->set( 'tax_query', $tax_query );
			$query->set( 'meta_key', 'mnsu_placement_home-slider' );
			$query->set( 'orderby', 'meta_value_num' );
			$query->set( 'order', 'ASC' );
		}
    }
}
add_action( 'pre_get_posts', 'mnsu_index_query' );