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- <?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;
-
- use Assetic\Asset\AssetInterface;
- use Assetic\Util\ProcessBuilder;
-
- /**
- * Loads LESS files.
- *
- * @author Kris Wallsmith <kris.wallsmith@gmail.com>
- */
- class LessFilter implements FilterInterface
- {
- private $nodeBin;
- private $nodePaths;
- private $compress;
-
- /**
- * Constructor.
- *
- * @param string $nodeBin The path to the node binary
- * @param array $nodePaths An array of node paths
- */
- public function __construct($nodeBin = '/usr/bin/node', array $nodePaths = array())
- {
- $this->nodeBin = $nodeBin;
- $this->nodePaths = $nodePaths;
- }
-
- public function setCompress($compress)
- {
- $this->compress = $compress;
- }
-
- public function filterLoad(AssetInterface $asset)
- {
- static $format = <<<'EOF'
- var less = require('less');
- var sys = require(process.binding('natives').util ? 'util' : 'sys');
-
- new(less.Parser)(%s).parse(%s, function(e, tree) {
- if (e) {
- less.writeError(e);
- process.exit(2);
- }
-
- try {
- sys.print(tree.toCSS(%s));
- } catch (e) {
- less.writeError(e);
- process.exit(3);
- }
- });
-
- EOF;
-
- $root = $asset->getSourceRoot();
- $path = $asset->getSourcePath();
-
- // parser options
- $parserOptions = array();
- if ($root && $path) {
- $parserOptions['paths'] = array(dirname($root.'/'.$path));
- $parserOptions['filename'] = basename($path);
- }
-
- // tree options
- $treeOptions = array();
- if (null !== $this->compress) {
- $treeOptions['compress'] = $this->compress;
- }
-
- $pb = new ProcessBuilder();
- $pb->inheritEnvironmentVariables();
-
- // node.js configuration
- if (0 < count($this->nodePaths)) {
- $pb->setEnv('NODE_PATH', implode(':', $this->nodePaths));
- }
-
- $pb->add($this->nodeBin)->add($input = tempnam(sys_get_temp_dir(), 'assetic_less'));
- file_put_contents($input, sprintf($format,
- json_encode($parserOptions),
- json_encode($asset->getContent()),
- json_encode($treeOptions)
- ));
-
- $proc = $pb->getProcess();
- $code = $proc->run();
- unlink($input);
-
- if (0 < $code) {
- throw new \RuntimeException($proc->getErrorOutput());
- }
-
- $asset->setContent($proc->getOutput());
- }
-
- public function filterDump(AssetInterface $asset)
- {
- }
- }
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