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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Finder\Shell;
/**
* @author Jean-François Simon <contact@jfsimon.fr>
*/
class Shell
{
const TYPE_UNIX = 1;
const TYPE_DARWIN = 2;
const TYPE_CYGWIN = 3;
const TYPE_WINDOWS = 4;
const TYPE_BSD = 5;
/**
* @var string|null
*/
private $type;
/**
* Returns guessed OS type.
*
* @return int
*/
public function getType()
{
if (null === $this->type) {
$this->type = $this->guessType();
}
return $this->type;
}
/**
* Tests if a command is available.
*
* @param string $command
*
* @return bool
*/
public function testCommand($command)
{
if (self::TYPE_WINDOWS === $this->type) {
// todo: find a way to test if Windows command exists
return false;
}
if (!function_exists('exec')) {
return false;
}
// todo: find a better way (command could not be available)
exec('command -v '.$command, $output, $code);
return 0 === $code && count($output) > 0;
}
/**
* Guesses OS type.
*
* @return int
*/
private function guessType()
{
$os = strtolower(PHP_OS);
if (false !== strpos($os, 'cygwin')) {
return self::TYPE_CYGWIN;
}
if (false !== strpos($os, 'darwin')) {
return self::TYPE_DARWIN;
}
if (false !== strpos($os, 'bsd')) {
return self::TYPE_BSD;
}
if (0 === strpos($os, 'win')) {
return self::TYPE_WINDOWS;
}
return self::TYPE_UNIX;
}
}