/**
* Compile less to css. Creates a cache-file of the last compiled less-file.
*
* This code is originally from the manual of lessphp.
*
* @param @less_fname string the filename of the less-file.
* @param @css_fname string the filename of the css-file.
* @param @cache_ext string the file-extension of the cache-file, added to the less filename. Default is '.cache'.
* @returns boolean true if the css-file was changed, else returns false.
*/
function auto_compile_less($less_fname, $css_fname, $cache_ext = '.cache')
{
$cache_fname = $less_fname . $cache_ext;
if (file_exists($cache_fname)) {
$cache = unserialize(file_get_contents($cache_fname));
} else {
$cache = $less_fname;
}
$new_cache = lessc::cexecute($cache);
if (!is_array($cache) || $new_cache['updated'] > $cache['updated']) {
file_put_contents($cache_fname, serialize($new_cache));
file_put_contents($css_fname, $new_cache['compiled']);
return true;
}
return false;
}
if (File::exists($path) || File::exists($path .= '.less')) {
$paths[] = $path;
$paths = array_merge($paths, $imports($path));
}
}
return $paths;
};
$compile = function ($input_file, $output_file) use($imports) {
try {
$latest = File::modified($input_file);
foreach ($imports($input_file) as $import) {
$import_modified = File::modified($import);
$latest = $import_modified > $latest ? $import_modified : $latest;
}
if (!File::exists($output_file) || $latest > File::modified($output_file)) {
$cache = lessc::cexecute($input_file);
File::put($output_file, $cache['compiled']);
}
} catch (Exception $ex) {
exit('lessc fatal error:<br />' . $ex->getMessage());
}
};
if (isset($config['directories'])) {
foreach ($config['directories'] as $less_dir => $css_dir) {
$less_dir = rtrim($less_dir, '/') . '/';
foreach (glob($less_dir . '*.[Ll][Ee][Ss][Ss]') as $less) {
$css = rtrim($css_dir, '/') . '/' . basename($less, '.less') . '.css';
$compile($less, $css);
}
}
}
public function beforeLayoutRender($observer)
{
if (!$this->_getConfigHelper()->isEnabled()) {
return;
}
$layout = Mage::getSingleton('core/layout');
if (($head = $layout->getBlock('head')) && $head instanceof Mage_Page_Block_Html_Head) {
$baseJsDir = Mage::getBaseDir() . DS . 'js' . DS;
$designPackage = Mage::getDesign();
$newItems = $head->getData('items');
$globalVars = $this->_getConfigHelper()->getGlobalVariables();
// Cache by file path
$filesCollection = Mage::getModel('less/file')->getCollection()->load();
$filesIds = array_flip($filesCollection->toOptionHash());
foreach ($newItems as $key => $item) {
if (in_array($item['type'], array('js_css', 'skin_css'))) {
// CSS file
if (substr($item['name'], -5) == '.less') {
// LESS file
if ($item['type'] == 'js_css') {
$lessFile = $baseJsDir . $item['name'];
} else {
$lessFile = $designPackage->getFilename($item['name'], array('_type' => 'skin'));
}
$baseFile = ltrim(str_replace(Mage::getBaseDir(), '', $lessFile), DS);
$cssFile = substr($lessFile, 0, -5) . '.css';
try {
// Init file config
if (isset($filesIds[$baseFile])) {
$isNewModel = false;
$model = $filesCollection->getItemById($filesIds[$baseFile]);
$oldCache = $model->getCache();
$forceRebuild = (bool) $model->getForceRebuild();
$customVars = $model->getCustomVariables();
$useGlobalVars = (bool) $model->getUseGlobalVariables();
$forceGlobalVars = (bool) $model->getForceGlobalVariables();
} else {
$isNewModel = true;
$model = null;
$oldCache = null;
$forceRebuild = false;
$customVars = array();
$useGlobalVars = true;
$forceGlobalVars = false;
}
// Get all needed variables for current file
if (is_array($customVars)) {
$oldVars = $customVars;
$customVars = array();
foreach ($oldVars as $oldVar) {
$customVars[$oldVar['code']] = $oldVar['value'];
}
} else {
$customVars = array();
}
if ($useGlobalVars) {
$variables = array_merge($forceGlobalVars ? $customVars : $globalVars, $forceGlobalVars ? $globalVars : $customVars);
} else {
$variables = $customVars;
}
$variables = array_merge($variables, $this->_getLessVariables($item['name']));
// Compile if needed (depends on cache and rebuild flag)
$oldCache = is_array($oldCache) ? $oldCache : $lessFile;
try {
$newCache = lessc::cexecute($oldCache, $forceRebuild, $variables, $this->_getLessFunctions($item['name']));
} catch (Exception $e) {
if ($this->_getConfigHelper()->getShowErrors()) {
if (!is_string($result = $this->_checkWritableFile($cssFile))) {
file_put_contents($cssFile, "\n/* " . $e->getMessage() . " */\n", FILE_APPEND);
}
}
throw $e;
}
if (!is_array($oldCache) || $newCache['updated'] > $oldCache['updated']) {
if (!is_string($result = $this->_checkWritableFile($cssFile))) {
file_put_contents($cssFile, $newCache['compiled']);
} else {
Mage::throwException($result);
}
if ($isNewModel) {
$model = Mage::getModel('less/file')->setPath($baseFile);
}
// Won't be further needed and takes most of the place
unset($newCache['compiled']);
$model->setCache($newCache)->save();
}
} catch (Exception $e) {
Mage::logException($e);
}
// Force adding the CSS file instead of Less one
$newItems[$key]['name'] = substr($item['name'], 0, -5) . '.css';
}
}
}
// Replace old items with parsed ones
$head->setData('items', $newItems);
}
}
