Jarves\AssetHandler\TraceurModuleHandler::compileFiles PHP Метод

    protected function compileFiles($files, $output)
    {
        $root = $webDir = realpath($this->jarves->getRootDir() . '/../') . '/';
        $web = $root . 'web';
        chdir($web);
        $traceur = 'traceur';
        //todo, make configurable
        $args = array($traceur, '--out=traceur_compiled.js', '--source-maps', '--experimental');
        $md5 = [];
        foreach ($files as $file) {
            $args[] = $file;
            $md5[] = filemtime($file);
        }
        $md5 = md5(implode('.', $md5));
        $needsCompilation = false;
        if (file_exists($output)) {
            $fh = fopen($output, 'r+');
            if ($fh) {
                fseek($fh, -32, SEEK_END);
                $lastLine = fgets($fh);
                $needsCompilation = $lastLine !== $md5;
                fclose($fh);
            }
        } else {
            $needsCompilation = true;
        }
        if ($needsCompilation) {
            $builder = new ProcessBuilder($args);
            $process = $builder->getProcess();
            $process->run();
            //            var_dump($process->getErrorOutput());
            //            var_dump($process->getOutput());
            //            echo($process->getCommandLine());
            //            var_dump($process->isSuccessful());
            //            exit;
            $isSuccessful = $process->isSuccessful();
            if ($isSuccessful) {
                $error = $process->getErrorOutput();
                if (false !== strpos($error, 'Internal error Error')) {
                    $isSuccessful = false;
                }
            }
            if ($isSuccessful) {
                $this->webFilesystem->mkdir(dirname($output));
                $this->webFilesystem->move('traceur_compiled.js', $output);
                $mapName = explode('.', $output);
                array_pop($mapName);
                $mapName[] = 'map';
                $mapName = implode('.', $mapName);
                $contents = file_get_contents($output);
                if (file_exists('traceur_compiled.map')) {
                    $this->webFilesystem->move('traceur_compiled.map', $mapName);
                    $contents = str_replace('//# sourceMappingURL=traceur_compiled.map', '//# sourceMappingURL=' . basename($mapName), $contents);
                }
                $contents .= "//compile-md5: {$md5}";
                file_put_contents($output, $contents);
            } else {
                chdir($root);
                throw new \Exception('Traceur Compile failed: ' . $process->getErrorOutput());
            }
        }
        chdir($root);
    }