zsturgess / overwatch

        $this->archiveFile = $archiveDir . 'overwatch_archive_' . date('YmdHis') . '.log';

        $this->output->writeln(' > Preparing archive file <info>' . $this->archiveFile . '</info>');

        if (!file_put_contents($this->archiveFile, $header . PHP_EOL, FILE_APPEND)) {

            throw new \InvalidArgumentException('Could not write to the archive file.');

        }

    }

    /**

    private function archiveResult(TestResult $result)

    {

        if ($this->archiveFile !== null) {

            file_put_contents($this->archiveFile, (string) $result . PHP_EOL, FILE_APPEND);

        }

        $this->em->remove($result);

    }