shell

var ScanBackupJson ScanOutput = func(r io.Reader, summary *Summary, w io.Writer) error {
	bogusPrefix := []byte("\r\x1b[2K")
	jsonPrefix := []byte(`{"message_type":"`)
	summaryPrefix := []byte(`{"message_type":"summary",`)
	jsonSuffix := []byte("}")
	eol := "\n"
	if runtime.GOOS == "windows" {
		eol = "\r\n"
	}
	scanner := bufio.NewScanner(r)
	for scanner.Scan() {
		line := scanner.Bytes()
		line = bytes.TrimPrefix(line, bogusPrefix)
		if bytes.HasPrefix(line, jsonPrefix) && bytes.HasSuffix(line, jsonSuffix) {
			if bytes.HasPrefix(line, summaryPrefix) {
				jsonSummary := ResticJsonSummary{}
				err := json.Unmarshal(line, &jsonSummary)
				if err != nil {
					continue
				}
				summary.FilesNew = jsonSummary.FilesNew
				summary.FilesChanged = jsonSummary.FilesChanged
				summary.FilesUnmodified = jsonSummary.FilesUnmodified
				summary.DirsNew = jsonSummary.DirsNew
				summary.DirsChanged = jsonSummary.DirsChanged
				summary.DirsUnmodified = jsonSummary.DirsUnmodified
				summary.FilesTotal = jsonSummary.TotalFilesProcessed
				summary.BytesAdded = jsonSummary.DataAdded
				summary.BytesTotal = jsonSummary.TotalBytesProcessed
			}
			continue
		}

		_, _ = w.Write(line)
		_, _ = w.Write([]byte(eol))
	}

	if err := scanner.Err(); err != nil {
		return err
	}
	return nil
}

var ScanBackupPlain ScanOutput = func(r io.Reader, summary *Summary, w io.Writer) error {
	eol := "\n"
	if runtime.GOOS == "windows" {
		eol = "\r\n"
	}
	rawBytes, unit, duration := 0.0, "", ""
	scanner := bufio.NewScanner(r)
	for scanner.Scan() {
		w.Write([]byte(scanner.Text() + eol))

		_, _ = fmt.Sscanf(scanner.Text(), "Files: %d new, %d changed, %d unmodified", &summary.FilesNew, &summary.FilesChanged, &summary.FilesUnmodified)
		_, _ = fmt.Sscanf(scanner.Text(), "Dirs: %d new, %d changed, %d unmodified", &summary.DirsNew, &summary.DirsChanged, &summary.DirsUnmodified)

		n, err := fmt.Sscanf(scanner.Text(), "Added to the repo: %f %3s", &rawBytes, &unit)
		if n == 2 && err == nil {
			summary.BytesAdded = unformatBytes(rawBytes, unit)
		}

		n, err = fmt.Sscanf(scanner.Text(), "processed %d files, %f %3s in %s", &summary.FilesTotal, &rawBytes, &unit, &duration)
		if n == 4 && err == nil {
			summary.BytesTotal = unformatBytes(rawBytes, unit)
		}
	}

	if err := scanner.Err(); err != nil {
		return err
	}
	return nil
}