advanced-custom-fields-wpcli.php

<?php
/*
Plugin Name: Advanced Custom Fields wp-cli Extension
Plugin URI: http://www.advancedcustomfields.com/add-ons/acf-wpcli/
Description: This extension for Advanced Custom Fields makes it possible to manage your field_groups through the console of wp-cli. 
Version: 0.1
Author: Hoppinger
Author URI: http://www.hoppinger.com/
License: GPL
Copyright: Hoppinger
*/

if ( defined('WP_CLI') && WP_CLI ) {
	
	// Include and register the class as the 'example' command handler
	include('ACFCommand.php');
	WP_CLI::addCommand( 'acf', 'ACFCommand' );
}

/* 
 * add the php field_groups to our wordpress installation on runtime
 */

if (!defined('WP_CLI') ) {
	function acf_wpcli_register_groups() {
		global $blog_id;
		if(function_exists("register_field_group")) :
			$db_field_groups = get_posts(array(
				'post_type'		=>	'acf',
			));
			
			$db_field_group_titles = array();
			foreach($db_field_groups as $db_group ) :
				$db_field_group_titles[] = $db_group->post_title;
			endforeach;
			
			$path_pattern 				= ABSPATH . 'field_groups/' . $blog_id . '/*/data.php';
			$shared_childs_pattern = ABSPATH . 'field_groups/shared-childs/*/data.php';
			$added_groups						= array();

			function get_data($f)
			{
				if (!is_readable($f) || !is_file($f))
					return false;
				
				include $f;
				return $group;
			}
			
			// register the field groups specific for this subsite
			foreach (glob($path_pattern) as $file) {
				$group = get_data($file);

				// Don't register group when the group is already in the DB
				if(!in_array($group['title'] , $db_field_group_titles))
					register_field_group($group);
					$added_groups[] = $group['title'];
			}
			
			if( $blog_id != 1 ){
				// register the field groups that are shared for all child websites
				foreach (glob($shared_childs_pattern) as $file) {
					$group = get_data($file);

					// 1. Don't register group when the group is already in the DB
					// 2. Don't register group when the group has been added from a blog_id specific group
					if(!in_array($group['title'] , $db_field_group_titles) && !in_array($group['title'] , $added_groups))
						register_field_group($group);
				}
			}

		endif;
	}
	add_action('plugins_loaded', 'acf_wpcli_register_groups');
}