public function copyTo($file)
    {
        if (null === $this->file) {
            throw LogicException::create(
                'The update file has not been downloaded.'
            );
        }

        $mode = 0755;

        if (file_exists($file)) {
            $mode = fileperms($file) & 511;
        }

        if (false === @copy($this->file, $file)) {
            throw FileException::lastError();
        }

        if (false === @chmod($file, $mode)) {
            throw FileException::lastError();
        }

        $key = $file . '.pubkey';

        if (file_exists($this->file . '.pubkey')) {
            if (false === @copy($this->file . '.pubkey', $key)) {
                throw FileException::lastError();
            }
        } elseif (file_exists($key)) {
            if (false === @unlink($key)) {
                throw FileException::lastError();
            }
        }
    }