--- /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__.'\Command 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 Command
+{
+ /**
+ * @var Command|null
+ */
+ private $parent;
+
+ /**
+ * @var array
+ */
+ private $bits = array();
+
+ /**
+ * @var array
+ */
+ private $labels = array();
+
+ /**
+ * @var \Closure|null
+ */
+ private $errorHandler;
+
+ /**
+ * Constructor.
+ *
+ * @param Command|null $parent Parent command
+ */
+ public function __construct(Command $parent = null)
+ {
+ $this->parent = $parent;
+ }
+
+ /**
+ * Returns command as string.
+ *
+ * @return string
+ */
+ public function __toString()
+ {
+ return $this->join();
+ }
+
+ /**
+ * Creates a new Command instance.
+ *
+ * @param Command|null $parent Parent command
+ *
+ * @return self
+ */
+ public static function create(Command $parent = null)
+ {
+ return new self($parent);
+ }
+
+ /**
+ * Escapes special chars from input.
+ *
+ * @param string $input A string to escape
+ *
+ * @return string The escaped string
+ */
+ public static function escape($input)
+ {
+ return escapeshellcmd($input);
+ }
+
+ /**
+ * Quotes input.
+ *
+ * @param string $input An argument string
+ *
+ * @return string The quoted string
+ */
+ public static function quote($input)
+ {
+ return escapeshellarg($input);
+ }
+
+ /**
+ * Appends a string or a Command instance.
+ *
+ * @param string|Command $bit
+ *
+ * @return $this
+ */
+ public function add($bit)
+ {
+ $this->bits[] = $bit;
+
+ return $this;
+ }
+
+ /**
+ * Prepends a string or a command instance.
+ *
+ * @param string|Command $bit
+ *
+ * @return $this
+ */
+ public function top($bit)
+ {
+ array_unshift($this->bits, $bit);
+
+ foreach ($this->labels as $label => $index) {
+ $this->labels[$label] += 1;
+ }
+
+ return $this;
+ }
+
+ /**
+ * Appends an argument, will be quoted.
+ *
+ * @param string $arg
+ *
+ * @return $this
+ */
+ public function arg($arg)
+ {
+ $this->bits[] = self::quote($arg);
+
+ return $this;
+ }
+
+ /**
+ * Appends escaped special command chars.
+ *
+ * @param string $esc
+ *
+ * @return $this
+ */
+ public function cmd($esc)
+ {
+ $this->bits[] = self::escape($esc);
+
+ return $this;
+ }
+
+ /**
+ * Inserts a labeled command to feed later.
+ *
+ * @param string $label The unique label
+ *
+ * @return self|string
+ *
+ * @throws \RuntimeException If label already exists
+ */
+ public function ins($label)
+ {
+ if (isset($this->labels[$label])) {
+ throw new \RuntimeException(sprintf('Label "%s" already exists.', $label));
+ }
+
+ $this->bits[] = self::create($this);
+ $this->labels[$label] = count($this->bits) - 1;
+
+ return $this->bits[$this->labels[$label]];
+ }
+
+ /**
+ * Retrieves a previously labeled command.
+ *
+ * @param string $label
+ *
+ * @return self|string
+ *
+ * @throws \RuntimeException
+ */
+ public function get($label)
+ {
+ if (!isset($this->labels[$label])) {
+ throw new \RuntimeException(sprintf('Label "%s" does not exist.', $label));
+ }
+
+ return $this->bits[$this->labels[$label]];
+ }
+
+ /**
+ * Returns parent command (if any).
+ *
+ * @return self
+ *
+ * @throws \RuntimeException If command has no parent
+ */
+ public function end()
+ {
+ if (null === $this->parent) {
+ throw new \RuntimeException('Calling end on root command doesn\'t make sense.');
+ }
+
+ return $this->parent;
+ }
+
+ /**
+ * Counts bits stored in command.
+ *
+ * @return int The bits count
+ */
+ public function length()
+ {
+ return count($this->bits);
+ }
+
+ /**
+ * @param \Closure $errorHandler
+ *
+ * @return $this
+ */
+ public function setErrorHandler(\Closure $errorHandler)
+ {
+ $this->errorHandler = $errorHandler;
+
+ return $this;
+ }
+
+ /**
+ * @return \Closure|null
+ */
+ public function getErrorHandler()
+ {
+ return $this->errorHandler;
+ }
+
+ /**
+ * Executes current command.
+ *
+ * @return array The command result
+ *
+ * @throws \RuntimeException
+ */
+ public function execute()
+ {
+ if (null === $errorHandler = $this->errorHandler) {
+ exec($this->join(), $output);
+ } else {
+ $process = proc_open($this->join(), array(0 => array('pipe', 'r'), 1 => array('pipe', 'w'), 2 => array('pipe', 'w')), $pipes);
+ $output = preg_split('~(\r\n|\r|\n)~', stream_get_contents($pipes[1]), -1, PREG_SPLIT_NO_EMPTY);
+
+ if ($error = stream_get_contents($pipes[2])) {
+ $errorHandler($error);
+ }
+
+ proc_close($process);
+ }
+
+ return $output ?: array();
+ }
+
+ /**
+ * Joins bits.
+ *
+ * @return string
+ */
+ public function join()
+ {
+ return implode(' ', array_filter(
+ array_map(function ($bit) {
+ return $bit instanceof Command ? $bit->join() : ($bit ?: null);
+ }, $this->bits),
+ function ($bit) { return null !== $bit; }
+ ));
+ }
+
+ /**
+ * Insert a string or a Command instance before the bit at given position $index (index starts from 0).
+ *
+ * @param string|Command $bit
+ * @param int $index
+ *
+ * @return $this
+ */
+ public function addAtIndex($bit, $index)
+ {
+ array_splice($this->bits, $index, 0, $bit instanceof self ? array($bit) : $bit);
+
+ return $this;
+ }
+}