}
	u.logger.Printf("Uploading %d reports", len(ready))
	for _, f := range ready {
		u.uploadReport(f)
	}
	return nil
}

// debugLogFile arranges to write a log file in the given debug directory, if
// it exists.
func debugLogFile(debugDir string) (*os.File, error) {
	fd, err := os.Stat(debugDir)
	if os.IsNotExist(err) {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}