public function mergeFiles(array $files, $outpuFilename)
{
assert(is_array($files) && !empty($files));
$message = sprintf('MINIFY: start mergeFiles to "%s"', $outpuFilename);
$this->_log->info($message);
if (file_exists($outpuFilename)) {
unlink($outpuFilename);
}
$shell = $this->_getShell();
foreach ($files as $filename) {
if (!file_exists($filename) || !is_readable($filename)) {
$message = sprintf('MINIFY ERROR: File not found "%s"', $filename);
$this->_log->crit($message);
throw new Miaox_Compress_Driver_Exception($message);
}
$command = sprintf('cat "%s" >> "%s"', $filename, $outpuFilename);
$returnVal = 0;
$shell->exec($command, $returnVal, false);
}
$message = sprintf('MINIFY: end mergeFiles');
$this->_log->info($message);
return $outpuFilename;
}
