1 | <?php |
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2 | |
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3 | /* |
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4 | * This file is part of the Assetic package, an OpenSky project. |
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5 | * |
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6 | * (c) 2010-2012 OpenSky Project Inc |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |
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12 | namespace Assetic\Filter; |
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13 | |
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14 | use Assetic\Asset\AssetInterface; |
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15 | use Assetic\Exception\FilterException; |
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16 | use Symfony\Component\Process\ProcessBuilder; |
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17 | |
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18 | /** |
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19 | * Loads STYL files. |
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20 | * |
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21 | * @link http://learnboost.github.com/stylus/ |
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22 | * @author Konstantin Kudryashov <ever.zet@gmail.com> |
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23 | */ |
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24 | class StylusFilter implements FilterInterface |
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25 | { |
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26 | private $nodeBin; |
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27 | private $nodePaths; |
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28 | private $compress; |
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29 | |
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30 | /** |
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31 | * Constructs filter. |
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32 | * |
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33 | * @param string $nodeBin The path to the node binary |
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34 | * @param array $nodePaths An array of node paths |
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35 | */ |
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36 | public function __construct($nodeBin = '/usr/bin/node', array $nodePaths = array()) |
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37 | { |
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38 | $this->nodeBin = $nodeBin; |
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39 | $this->nodePaths = $nodePaths; |
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40 | } |
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41 | |
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42 | /** |
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43 | * Enable output compression. |
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44 | * |
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45 | * @param boolean $compress |
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46 | */ |
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47 | public function setCompress($compress) |
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48 | { |
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49 | $this->compress = $compress; |
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50 | } |
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51 | |
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52 | /** |
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53 | * {@inheritdoc} |
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54 | */ |
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55 | public function filterLoad(AssetInterface $asset) |
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56 | { |
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57 | static $format = <<<'EOF' |
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58 | var stylus = require('stylus'); |
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59 | var sys = require(process.binding('natives').util ? 'util' : 'sys'); |
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60 | |
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61 | stylus(%s, %s).render(function(e, css){ |
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62 | if (e) { |
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63 | throw e; |
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64 | } |
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65 | |
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66 | sys.print(css); |
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67 | process.exit(0); |
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68 | }); |
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69 | |
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70 | EOF; |
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71 | |
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72 | $root = $asset->getSourceRoot(); |
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73 | $path = $asset->getSourcePath(); |
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74 | |
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75 | // parser options |
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76 | $parserOptions = array(); |
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77 | if ($root && $path) { |
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78 | $parserOptions['paths'] = array(dirname($root.'/'.$path)); |
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79 | $parserOptions['filename'] = basename($path); |
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80 | } |
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81 | |
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82 | if (null !== $this->compress) { |
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83 | $parserOptions['compress'] = $this->compress; |
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84 | } |
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85 | |
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86 | $pb = new ProcessBuilder(); |
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87 | $pb->inheritEnvironmentVariables(); |
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88 | |
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89 | // node.js configuration |
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90 | if (0 < count($this->nodePaths)) { |
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91 | $pb->setEnv('NODE_PATH', implode(':', $this->nodePaths)); |
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92 | } |
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93 | |
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94 | $pb->add($this->nodeBin)->add($input = tempnam(sys_get_temp_dir(), 'assetic_stylus')); |
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95 | file_put_contents($input, sprintf($format, |
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96 | json_encode($asset->getContent()), |
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97 | json_encode($parserOptions) |
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98 | )); |
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99 | |
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100 | $proc = $pb->getProcess(); |
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101 | $code = $proc->run(); |
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102 | unlink($input); |
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103 | |
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104 | if (0 < $code) { |
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105 | throw FilterException::fromProcess($proc)->setInput($asset->getContent()); |
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106 | } |
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107 | |
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108 | $asset->setContent($proc->getOutput()); |
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109 | } |
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110 | |
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111 | /** |
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112 | * {@inheritdoc} |
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113 | */ |
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114 | public function filterDump(AssetInterface $asset) |
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115 | { |
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116 | } |
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117 | } |
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