Adding a WooCommerce Custom Order Status

wc_icon_status.php

<?php
/**
 * Adds icons for any custom order statuses
**/
add_action( 'wp_print_scripts', 'pc_add_custom_order_status_icon' );
function pc_add_custom_order_status_icon() {
	
	if( ! is_admin() ) { 
		return; 
	}
	
	?> <style>
		/* Add custom status order icons */
		.column-order_status mark.awaiting-shipment,
		.column-order_status mark.building {
			content: url(/wp-content/uploads/2014/10/CustomOrderStatus.png);
		} 
	</style> <?php
}

wc_new_status.php

<?php
/** 
 * Register new status
**/
function register_awaiting_shipment_order_status() {
    register_post_status( 'wc-awaiting-shipment', array(
        'label'                     => 'Awaiting shipment',
        'public'                    => true,
        'exclude_from_search'       => false,
        'show_in_admin_all_list'    => true,
        'show_in_admin_status_list' => true,
        'label_count'               => _n_noop( 'Awaiting shipment <span class="count">(%s)</span>', 'Awaiting shipment <span class="count">(%s)</span>' )
    ) );
}
add_action( 'init', 'register_awaiting_shipment_order_status' );

// Add to list of WC Order statuses
function add_awaiting_shipment_to_order_statuses( $order_statuses ) {

    $new_order_statuses = array();

    // add new order status after processing
    foreach ( $order_statuses as $key => $status ) {

        $new_order_statuses[ $key ] = $status;

        if ( 'wc-processing' === $key ) {
            $new_order_statuses['wc-awaiting-shipment'] = 'Awaiting shipment';
        }
    }

    return $new_order_statuses;
}
add_filter( 'wc_order_statuses', 'add_awaiting_shipment_to_order_statuses' );

.widefat .column-order_status mark.re-opened::after {
content: "\e018";
color: #ffba00;
font-family: WooCommerce;
speak: none;
font-weight: 400;
font-variant: normal;
text-transform: none;
line-height: 1;
-webkit-font-smoothing: antialiased;
margin: 0;
text-indent: 0;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
text-align: center;
}