--- /dev/null
+<?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;
+
+@trigger_error('The '.__NAMESPACE__.'\Shell class is deprecated since version 2.8 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+/**
+ * @author Jean-François Simon <contact@jfsimon.fr>
+ *
+ * @deprecated since 2.8, to be removed in 3.0.
+ */
+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 (!function_exists('exec')) {
+ return false;
+ }
+
+ // todo: find a better way (command could not be available)
+ $testCommand = 'which ';
+ if (self::TYPE_WINDOWS === $this->type) {
+ $testCommand = 'where ';
+ }
+
+ $command = escapeshellcmd($command);
+
+ exec($testCommand.$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;
+ }
+}