<?php defined('SYSPATH') or die('No direct script access.');
/**
 * Helper functions for working in a command-line environment.
 *
 * @package    Kohana
 * @category   Helpers
 * @author     Kohana Team
 * @copyright  (c) 2009-2011 Kohana Team
 * @license    http://kohanaframework.org/license
 */
class Kohana_CLI {

	/**
	 * Returns one or more command-line options. Options are specified using
	 * standard CLI syntax:
	 *
	 *     php index.php --username=john.smith --password=secret --var="some value with spaces"
	 *
	 *     // Get the values of "username" and "password"
	 *     $auth = CLI::options('username', 'password');
	 *
	 * @param   string  option name
	 * @param   ...
	 * @return  array
	 */
	public static function options($options)
	{
		// Get all of the requested options
		$options = func_get_args();

		// Found option values
		$values = array();

		// Skip the first option, it is always the file executed
		for ($i = 1; $i < $_SERVER['argc']; $i++)
		{
			if ( ! isset($_SERVER['argv'][$i]))
			{
				// No more args left
				break;
			}

			// Get the option
			$opt = $_SERVER['argv'][$i];

			if (substr($opt, 0, 2) !== '--')
			{
				// This is not an option argument
				continue;
			}

			// Remove the "--" prefix
			$opt = substr($opt, 2);

			if (strpos($opt, '='))
			{
				// Separate the name and value
				list ($opt, $value) = explode('=', $opt, 2);
			}
			else
			{
				$value = NULL;
			}

			if (in_array($opt, $options))
			{
				// Set the given value
				$values[$opt] = $value;
			}
		}

		return $values;
	}

} // End CLI
