public static function hostfile($hostfile)
{
$config = CssCrush::$config;
$regex = CssCrush::$regex;
// Keep track of all import file info for later logging
$mtimes = array();
$filenames = array();
// Get the hostfile contents and obfuscate commented imports
$str = self::obfuscateComments(file_get_contents($hostfile->path));
// This may be set non-zero if an absoulte URL is encountered
$searchOffset = 0;
// Recurses until the nesting heirarchy is flattened and all files are combined
while (preg_match($regex->import, $str, $match, PREG_OFFSET_CAPTURE, $searchOffset)) {
$fullMatch = $match[0][0];
// Full match
$matchStart = $match[0][1];
// Full match offset
$matchEnd = $matchStart + strlen($fullMatch);
$url = trim($match[1][0]);
// The url
$mediaContext = trim($match[2][0]);
// The media context if specified
$preStatement = substr($str, 0, $matchStart);
$postStatement = substr($str, $matchEnd);
// Pass over absolute urls
// Move the search pointer forward
if (preg_match('!^https?://!', $url)) {
$searchOffset = $matchEnd;
continue;
}
$import = new stdClass();
$import->name = $url;
$import->mediaContext = $mediaContext;
$import->path = "{$hostfile->dir}/{$import->name}";
$import->content = @file_get_contents($import->path);
// Failed to open import, just continue with the import line removed
if (!$import->content) {
CssCrush::log("Import file '{$import->name}' not found");
$str = $preStatement . $postStatement;
continue;
} else {
$import->content = self::obfuscateComments($import->content);
if ($import->mediaContext) {
$import->content = "@media {$import->mediaContext} {" . $import->content . '}';
}
$import->dir = dirname($import->name);
// Store import file info
$mtimes[] = filemtime($import->path);
$filenames[] = $import->name;
// Store the replacements we might find
$replacements = array();
// Match all @import statements in the import content
// Alter all the url strings to be paths relative to the hostfile
$matchCount = preg_match_all($regex->import, $import->content, $matchAll, PREG_OFFSET_CAPTURE);
for ($index = 0; $index < $matchCount; $index++) {
$fullMatch = $matchAll[0][$index][0];
$urlMatch = $matchAll[1][$index][0];
$search = $urlMatch;
$replace = "{$import->dir}/{$urlMatch}";
// Try to resolve absolute paths
// On failure strip the @import statement
if (strpos($urlMatch, '/') === 0) {
$replace = self::resolveAbsolutePath($urlMatch);
if (!$replace) {
$search = $fullMatch;
$replace = '';
}
}
$replacements[$fullMatch] = str_replace($search, $replace, $fullMatch);
}
// If we've stored any altered @import strings then we need to apply them
if (count($replacements)) {
$import->content = str_replace(array_keys($replacements), array_values($replacements), $import->content);
}
// CssCrush::log( $replacements );
$str = $preStatement . $import->content . $postStatement;
}
}
// End while
self::save(array('imports' => $filenames, 'datem_sum' => array_sum($mtimes) + $hostfile->mtime, 'options' => CssCrush::$options));
return $str;
}
