<?php

/*

 * This file is part of the Assetic package, an OpenSky project.

 *

 * (c) 2010-2011 OpenSky Project Inc

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Assetic\Util;

/**

 * Process builder.

 *

 * @author Kris Wallsmith <kris.wallsmith@gmail.com>

 */

class ProcessBuilder

{

    private $parts = array();

    private $cwd;

    private $env;

    private $stdin;

    private $timeout = 60;

    private $options = array();

    private $inheritEnv = false;

    public function add($part)

    {

        $this->parts[] = $part;

        return $this;

    }

    public function setWorkingDirectory($cwd)

    {

        $this->cwd = $cwd;

        return $this;

    }

    public function inheritEnvironmentVariables($inheritEnv = true)

    {

        $this->inheritEnv = $inheritEnv;

        return $this;

    }

    public function setEnv($name, $value)

    {

        if (null === $this->env) {

            $this->env = array();

        }

        $this->env[$name] = $value;

        return $this;

    }

    public function setInput($stdin)

    {

        $this->stdin = $stdin;

        return $this;

    }

    public function setTimeout($timeout)

    {

        $this->timeout = $timeout;

        return $this;

    }

    public function setOption($name, $value)

    {

        $this->options[$name] = $value;

        return $this;

    }

    public function getProcess()

    {

        if (!count($this->parts)) {

            throw new \LogicException('You must add() command parts before calling getProcess().');

        }

        $parts = $this->parts;

        $cmd = array_shift($parts);

        $script = escapeshellcmd($cmd).' '.implode(' ', array_map('escapeshellarg', $parts));

        $env = $this->inheritEnv ? ($this->env ?: array()) + $_ENV : $this->env;

        return new Process($script, $this->cwd, $env, $this->stdin, $this->timeout, $this->options);

    }

}