vendor/symfony/finder/Shell/Command.php

Go to the documentation of this file.

<?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;

class Command
{
    private $parent;

    private $bits = array();

    private $labels = array();

    private $errorHandler;

    public function __construct(Command $parent = null)
    {
        $this->parent = $parent;
    }

    public function __toString()
    {
        return $this->join();
    }

    public static function create(Command $parent = null)
    {
        return new self($parent);
    }

    public static function escape($input)
    {
        return escapeshellcmd($input);
    }

    public static function quote($input)
    {
        return escapeshellarg($input);
    }

    public function add($bit)
    {
        $this->bits[] = $bit;

        return $this;
    }

    public function top($bit)
    {
        array_unshift($this->bits, $bit);

        foreach ($this->labels as $label => $index) {
            $this->labels[$label] += 1;
        }

        return $this;
    }

    public function arg($arg)
    {
        $this->bits[] = self::quote($arg);

        return $this;
    }

    public function cmd($esc)
    {
        $this->bits[] = self::escape($esc);

        return $this;
    }

    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]];
    }

    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]];
    }

    public function end()
    {
        if (null === $this->parent) {
            throw new \RuntimeException('Calling end on root command doesn\'t make sense.');
        }

        return $this->parent;
    }

    public function length()
    {
        return count($this->bits);
    }

    public function setErrorHandler(\Closure $errorHandler)
    {
        $this->errorHandler = $errorHandler;

        return $this;
    }

    public function getErrorHandler()
    {
        return $this->errorHandler;
    }

    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();
    }

    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; }
        ));
    }

    public function addAtIndex($bit, $index)
    {
        array_splice($this->bits, $index, 0, $bit instanceof self ? array($bit) : $bit);

        return $this;
    }
}