CompilerJarFilter.php

<?php

/*
 * This file is part of the Assetic package, an OpenSky project.
 *
 * (c) 2010-2012 OpenSky Project Inc
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Assetic\Filter\GoogleClosure;

use Assetic\Asset\AssetInterface;
use Assetic\Exception\FilterException;
use Symfony\Component\Process\ProcessBuilder;

/**
 * Filter for the Google Closure Compiler JAR.
 *
 * @link https://developers.google.com/closure/compiler/
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class CompilerJarFilter extends BaseCompilerFilter {
  private $jarPath;
  private $javaPath;
  public function __construct($jarPath, $javaPath = '/usr/bin/java') {
    $this->jarPath = $jarPath;
    $this->javaPath = $javaPath;
  }
  public function filterDump(AssetInterface $asset) {
    $cleanup = array();
    $pb = new ProcessBuilder(array(
      $this->javaPath,
      '-jar',
      $this->jarPath,
    ));
    if (null !== $this->compilationLevel) {
      $pb
        ->add('--compilation_level')
        ->add($this->compilationLevel);
    }
    if (null !== $this->jsExterns) {
      $cleanup[] = $externs = tempnam(sys_get_temp_dir(), 'assetic_google_closure_compiler');
      file_put_contents($externs, $this->jsExterns);
      $pb
        ->add('--externs')
        ->add($externs);
    }
    if (null !== $this->externsUrl) {
      $cleanup[] = $externs = tempnam(sys_get_temp_dir(), 'assetic_google_closure_compiler');
      file_put_contents($externs, file_get_contents($this->externsUrl));
      $pb
        ->add('--externs')
        ->add($externs);
    }
    if (null !== $this->excludeDefaultExterns) {
      $pb
        ->add('--use_only_custom_externs');
    }
    if (null !== $this->formatting) {
      $pb
        ->add('--formatting')
        ->add($this->formatting);
    }
    if (null !== $this->useClosureLibrary) {
      $pb
        ->add('--manage_closure_dependencies');
    }
    if (null !== $this->warningLevel) {
      $pb
        ->add('--warning_level')
        ->add($this->warningLevel);
    }
    if (null !== $this->language) {
      $pb
        ->add('--language_in')
        ->add($this->language);
    }
    $pb
      ->add('--js')
      ->add($cleanup[] = $input = tempnam(sys_get_temp_dir(), 'assetic_google_closure_compiler'));
    file_put_contents($input, $asset
      ->getContent());
    $proc = $pb
      ->getProcess();
    $code = $proc
      ->run();
    array_map('unlink', $cleanup);
    if (0 < $code) {
      throw FilterException::fromProcess($proc)
        ->setInput($asset
        ->getContent());
    }
    $asset
      ->setContent($proc
      ->getOutput());
  }

}