* * 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 */ 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; } }