[7575] | 1 | <?php |
---|
| 2 | |
---|
| 3 | /* |
---|
| 4 | * This file is part of the Assetic package, an OpenSky project. |
---|
| 5 | * |
---|
| 6 | * (c) 2010-2012 OpenSky Project Inc |
---|
| 7 | * |
---|
| 8 | * For the full copyright and license information, please view the LICENSE |
---|
| 9 | * file that was distributed with this source code. |
---|
| 10 | */ |
---|
| 11 | |
---|
| 12 | namespace Assetic\Filter; |
---|
| 13 | |
---|
| 14 | use Assetic\Asset\AssetInterface; |
---|
| 15 | use Assetic\Exception\FilterException; |
---|
| 16 | use Symfony\Component\Process\ProcessBuilder; |
---|
| 17 | |
---|
| 18 | /** |
---|
| 19 | * Loads LESS files. |
---|
| 20 | * |
---|
| 21 | * @link http://lesscss.org/ |
---|
| 22 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
---|
| 23 | */ |
---|
| 24 | class LessFilter implements FilterInterface |
---|
| 25 | { |
---|
| 26 | private $nodeBin; |
---|
| 27 | private $nodePaths; |
---|
| 28 | private $compress; |
---|
| 29 | |
---|
| 30 | /** |
---|
| 31 | * Load Paths |
---|
| 32 | * |
---|
| 33 | * A list of paths which less will search for includes. |
---|
| 34 | * |
---|
| 35 | * @var array |
---|
| 36 | */ |
---|
| 37 | protected $loadPaths = array(); |
---|
| 38 | |
---|
| 39 | /** |
---|
| 40 | * Constructor. |
---|
| 41 | * |
---|
| 42 | * @param string $nodeBin The path to the node binary |
---|
| 43 | * @param array $nodePaths An array of node paths |
---|
| 44 | */ |
---|
| 45 | public function __construct($nodeBin = '/usr/bin/node', array $nodePaths = array()) |
---|
| 46 | { |
---|
| 47 | $this->nodeBin = $nodeBin; |
---|
| 48 | $this->nodePaths = $nodePaths; |
---|
| 49 | } |
---|
| 50 | |
---|
| 51 | public function setCompress($compress) |
---|
| 52 | { |
---|
| 53 | $this->compress = $compress; |
---|
| 54 | } |
---|
| 55 | |
---|
| 56 | /** |
---|
| 57 | * Adds a path where less will search for includes |
---|
| 58 | * |
---|
| 59 | * @param string $path Load path (absolute) |
---|
| 60 | */ |
---|
| 61 | public function addLoadPath($path) |
---|
| 62 | { |
---|
| 63 | $this->loadPaths[] = $path; |
---|
| 64 | } |
---|
| 65 | |
---|
| 66 | public function filterLoad(AssetInterface $asset) |
---|
| 67 | { |
---|
| 68 | static $format = <<<'EOF' |
---|
| 69 | var less = require('less'); |
---|
| 70 | var sys = require(process.binding('natives').util ? 'util' : 'sys'); |
---|
| 71 | |
---|
| 72 | new(less.Parser)(%s).parse(%s, function(e, tree) { |
---|
| 73 | if (e) { |
---|
| 74 | less.writeError(e); |
---|
| 75 | process.exit(2); |
---|
| 76 | } |
---|
| 77 | |
---|
| 78 | try { |
---|
| 79 | sys.print(tree.toCSS(%s)); |
---|
| 80 | } catch (e) { |
---|
| 81 | less.writeError(e); |
---|
| 82 | process.exit(3); |
---|
| 83 | } |
---|
| 84 | }); |
---|
| 85 | |
---|
| 86 | EOF; |
---|
| 87 | |
---|
| 88 | $root = $asset->getSourceRoot(); |
---|
| 89 | $path = $asset->getSourcePath(); |
---|
| 90 | |
---|
| 91 | // parser options |
---|
| 92 | $parserOptions = array(); |
---|
| 93 | if ($root && $path) { |
---|
| 94 | $parserOptions['paths'] = array(dirname($root.'/'.$path)); |
---|
| 95 | $parserOptions['filename'] = basename($path); |
---|
| 96 | } |
---|
| 97 | foreach ($this->loadPaths as $loadPath) { |
---|
| 98 | $parserOptions['paths'][] = $loadPath; |
---|
| 99 | } |
---|
| 100 | |
---|
| 101 | // tree options |
---|
| 102 | $treeOptions = array(); |
---|
| 103 | if (null !== $this->compress) { |
---|
| 104 | $treeOptions['compress'] = $this->compress; |
---|
| 105 | } |
---|
| 106 | |
---|
| 107 | $pb = new ProcessBuilder(); |
---|
| 108 | $pb->inheritEnvironmentVariables(); |
---|
| 109 | |
---|
| 110 | // node.js configuration |
---|
| 111 | if (0 < count($this->nodePaths)) { |
---|
| 112 | $pb->setEnv('NODE_PATH', implode(':', $this->nodePaths)); |
---|
| 113 | } |
---|
| 114 | |
---|
| 115 | $pb->add($this->nodeBin)->add($input = tempnam(sys_get_temp_dir(), 'assetic_less')); |
---|
| 116 | file_put_contents($input, sprintf($format, |
---|
| 117 | json_encode($parserOptions), |
---|
| 118 | json_encode($asset->getContent()), |
---|
| 119 | json_encode($treeOptions) |
---|
| 120 | )); |
---|
| 121 | |
---|
| 122 | $proc = $pb->getProcess(); |
---|
| 123 | $code = $proc->run(); |
---|
| 124 | unlink($input); |
---|
| 125 | |
---|
| 126 | if (0 < $code) { |
---|
| 127 | throw FilterException::fromProcess($proc)->setInput($asset->getContent()); |
---|
| 128 | } |
---|
| 129 | |
---|
| 130 | $asset->setContent($proc->getOutput()); |
---|
| 131 | } |
---|
| 132 | |
---|
| 133 | public function filterDump(AssetInterface $asset) |
---|
| 134 | { |
---|
| 135 | } |
---|
| 136 | } |
---|