message: Show composer info.
diff: @@ -132,8 +132,7 @@ if ((substr(PHP_OS, 0, 3) == "WIN") && empty($environment["SystemRoot"])) {
  $vendor_dir = $composer_dir . '/vendor';
  $expired = microtime(true) - filectime($vendor_dir) > 600;
  if ($expired) {
  - $composer_info = `cd {$composer_dir} && composer update 2>&1`;
  - echo $composer_info;
  + system("cd {$composer_dir} && composer update 2>&1");
  }
  if (!file_exists($vendor_dir . '/autoload.php')) {
  throw new RuntimeException('Composer install failed');
  