mirror of
https://github.com/restic/restic.git
synced 2024-12-23 16:26:11 +00:00
380 lines
9 KiB
Go
380 lines
9 KiB
Go
package ui
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import (
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"context"
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"fmt"
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"os"
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"sort"
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"sync"
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"time"
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"github.com/restic/restic/internal/archiver"
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"github.com/restic/restic/internal/restic"
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"github.com/restic/restic/internal/ui/termstatus"
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)
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type counter struct {
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Files, Dirs uint
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Bytes uint64
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}
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type fileWorkerMessage struct {
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filename string
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done bool
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}
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// Backup reports progress for the `backup` command.
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type Backup struct {
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*Message
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*StdioWrapper
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MinUpdatePause time.Duration
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term *termstatus.Terminal
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v uint
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start time.Time
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totalBytes uint64
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totalCh chan counter
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processedCh chan counter
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errCh chan struct{}
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workerCh chan fileWorkerMessage
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finished chan struct{}
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summary struct {
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sync.Mutex
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Files, Dirs struct {
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New uint
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Changed uint
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Unchanged uint
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}
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ProcessedBytes uint64
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archiver.ItemStats
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}
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}
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// NewBackup returns a new backup progress reporter.
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func NewBackup(term *termstatus.Terminal, verbosity uint) *Backup {
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return &Backup{
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Message: NewMessage(term, verbosity),
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StdioWrapper: NewStdioWrapper(term),
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term: term,
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v: verbosity,
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start: time.Now(),
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// limit to 60fps by default
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MinUpdatePause: time.Second / 60,
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totalCh: make(chan counter),
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processedCh: make(chan counter),
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errCh: make(chan struct{}),
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workerCh: make(chan fileWorkerMessage),
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finished: make(chan struct{}),
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}
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}
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// Run regularly updates the status lines. It should be called in a separate
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// goroutine.
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func (b *Backup) Run(ctx context.Context) error {
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var (
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lastUpdate time.Time
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total, processed counter
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errors uint
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started bool
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currentFiles = make(map[string]struct{})
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secondsRemaining uint64
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)
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t := time.NewTicker(time.Second)
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defer t.Stop()
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for {
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select {
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case <-ctx.Done():
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return nil
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case <-b.finished:
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started = false
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b.term.SetStatus([]string{""})
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case t, ok := <-b.totalCh:
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if ok {
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total = t
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started = true
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} else {
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// scan has finished
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b.totalCh = nil
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b.totalBytes = total.Bytes
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}
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case s := <-b.processedCh:
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processed.Files += s.Files
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processed.Dirs += s.Dirs
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processed.Bytes += s.Bytes
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started = true
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case <-b.errCh:
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errors++
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started = true
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case m := <-b.workerCh:
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if m.done {
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delete(currentFiles, m.filename)
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} else {
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currentFiles[m.filename] = struct{}{}
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}
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case <-t.C:
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if !started {
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continue
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}
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if b.totalCh == nil {
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secs := float64(time.Since(b.start) / time.Second)
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todo := float64(total.Bytes - processed.Bytes)
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secondsRemaining = uint64(secs / float64(processed.Bytes) * todo)
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}
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}
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// limit update frequency
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if time.Since(lastUpdate) < b.MinUpdatePause {
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continue
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}
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lastUpdate = time.Now()
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b.update(total, processed, errors, currentFiles, secondsRemaining)
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}
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}
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// update updates the status lines.
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func (b *Backup) update(total, processed counter, errors uint, currentFiles map[string]struct{}, secs uint64) {
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var status string
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if total.Files == 0 && total.Dirs == 0 {
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// no total count available yet
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status = fmt.Sprintf("[%s] %v files, %s, %d errors",
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formatDuration(time.Since(b.start)),
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processed.Files, formatBytes(processed.Bytes), errors,
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)
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} else {
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var eta, percent string
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if secs > 0 && processed.Bytes < total.Bytes {
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eta = fmt.Sprintf(" ETA %s", formatSeconds(secs))
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percent = formatPercent(processed.Bytes, total.Bytes)
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percent += " "
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}
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// include totals
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status = fmt.Sprintf("[%s] %s%v files %s, total %v files %v, %d errors%s",
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formatDuration(time.Since(b.start)),
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percent,
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processed.Files,
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formatBytes(processed.Bytes),
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total.Files,
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formatBytes(total.Bytes),
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errors,
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eta,
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)
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}
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lines := make([]string, 0, len(currentFiles)+1)
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for filename := range currentFiles {
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lines = append(lines, filename)
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}
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sort.Sort(sort.StringSlice(lines))
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lines = append([]string{status}, lines...)
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b.term.SetStatus(lines)
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}
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// ScannerError is the error callback function for the scanner, it prints the
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// error in verbose mode and returns nil.
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func (b *Backup) ScannerError(item string, fi os.FileInfo, err error) error {
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b.V("scan: %v\n", err)
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return nil
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}
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// Error is the error callback function for the archiver, it prints the error and returns nil.
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func (b *Backup) Error(item string, fi os.FileInfo, err error) error {
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b.E("error: %v\n", err)
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b.errCh <- struct{}{}
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return nil
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}
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// StartFile is called when a file is being processed by a worker.
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func (b *Backup) StartFile(filename string) {
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b.workerCh <- fileWorkerMessage{
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filename: filename,
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}
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}
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// CompleteBlob is called for all saved blobs for files.
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func (b *Backup) CompleteBlob(filename string, bytes uint64) {
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b.processedCh <- counter{Bytes: bytes}
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}
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func formatPercent(numerator uint64, denominator uint64) string {
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if denominator == 0 {
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return ""
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}
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percent := 100.0 * float64(numerator) / float64(denominator)
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if percent > 100 {
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percent = 100
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}
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return fmt.Sprintf("%3.2f%%", percent)
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}
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func formatSeconds(sec uint64) string {
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hours := sec / 3600
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sec -= hours * 3600
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min := sec / 60
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sec -= min * 60
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if hours > 0 {
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return fmt.Sprintf("%d:%02d:%02d", hours, min, sec)
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}
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return fmt.Sprintf("%d:%02d", min, sec)
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}
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func formatDuration(d time.Duration) string {
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sec := uint64(d / time.Second)
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return formatSeconds(sec)
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}
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func formatBytes(c uint64) string {
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b := float64(c)
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switch {
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case c > 1<<40:
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return fmt.Sprintf("%.3f TiB", b/(1<<40))
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case c > 1<<30:
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return fmt.Sprintf("%.3f GiB", b/(1<<30))
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case c > 1<<20:
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return fmt.Sprintf("%.3f MiB", b/(1<<20))
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case c > 1<<10:
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return fmt.Sprintf("%.3f KiB", b/(1<<10))
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default:
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return fmt.Sprintf("%d B", c)
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}
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}
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// CompleteItem is the status callback function for the archiver when a
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// file/dir has been saved successfully.
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func (b *Backup) CompleteItem(item string, previous, current *restic.Node, s archiver.ItemStats, d time.Duration) {
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b.summary.Lock()
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b.summary.ItemStats.Add(s)
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// for the last item "/", current is nil
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if current != nil {
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b.summary.ProcessedBytes += current.Size
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}
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b.summary.Unlock()
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if current == nil {
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// error occurred, tell the status display to remove the line
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b.workerCh <- fileWorkerMessage{
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filename: item,
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done: true,
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}
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return
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}
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switch current.Type {
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case "file":
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b.processedCh <- counter{Files: 1}
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b.workerCh <- fileWorkerMessage{
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filename: item,
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done: true,
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}
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case "dir":
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b.processedCh <- counter{Dirs: 1}
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}
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if current.Type == "dir" {
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if previous == nil {
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b.VV("new %v, saved in %.3fs (%v added, %v metadata)", item, d.Seconds(), formatBytes(s.DataSize), formatBytes(s.TreeSize))
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b.summary.Lock()
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b.summary.Dirs.New++
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b.summary.Unlock()
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return
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}
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if previous.Equals(*current) {
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b.VV("unchanged %v", item)
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b.summary.Lock()
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b.summary.Dirs.Unchanged++
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b.summary.Unlock()
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} else {
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b.VV("modified %v, saved in %.3fs (%v added, %v metadata)", item, d.Seconds(), formatBytes(s.DataSize), formatBytes(s.TreeSize))
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b.summary.Lock()
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b.summary.Dirs.Changed++
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b.summary.Unlock()
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}
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} else if current.Type == "file" {
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b.workerCh <- fileWorkerMessage{
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done: true,
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filename: item,
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}
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if previous == nil {
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b.VV("new %v, saved in %.3fs (%v added)", item, d.Seconds(), formatBytes(s.DataSize))
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b.summary.Lock()
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b.summary.Files.New++
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b.summary.Unlock()
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return
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}
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if previous.Equals(*current) {
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b.VV("unchanged %v", item)
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b.summary.Lock()
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b.summary.Files.Unchanged++
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b.summary.Unlock()
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} else {
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b.VV("modified %v, saved in %.3fs (%v added)", item, d.Seconds(), formatBytes(s.DataSize))
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b.summary.Lock()
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b.summary.Files.Changed++
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b.summary.Unlock()
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}
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}
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}
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// ReportTotal sets the total stats up to now
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func (b *Backup) ReportTotal(item string, s archiver.ScanStats) {
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select {
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case b.totalCh <- counter{Files: s.Files, Dirs: s.Dirs, Bytes: s.Bytes}:
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case <-b.finished:
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}
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if item == "" {
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b.V("scan finished in %.3fs: %v files, %s",
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time.Since(b.start).Seconds(),
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s.Files, formatBytes(s.Bytes),
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)
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close(b.totalCh)
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return
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}
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}
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// Finish prints the finishing messages.
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func (b *Backup) Finish(snapshotID restic.ID) {
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close(b.finished)
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b.P("\n")
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b.P("Files: %5d new, %5d changed, %5d unmodified\n", b.summary.Files.New, b.summary.Files.Changed, b.summary.Files.Unchanged)
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b.P("Dirs: %5d new, %5d changed, %5d unmodified\n", b.summary.Dirs.New, b.summary.Dirs.Changed, b.summary.Dirs.Unchanged)
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b.V("Data Blobs: %5d new\n", b.summary.ItemStats.DataBlobs)
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b.V("Tree Blobs: %5d new\n", b.summary.ItemStats.TreeBlobs)
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b.P("Added to the repo: %-5s\n", formatBytes(b.summary.ItemStats.DataSize+b.summary.ItemStats.TreeSize))
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b.P("\n")
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b.P("processed %v files, %v in %s",
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b.summary.Files.New+b.summary.Files.Changed+b.summary.Files.Unchanged,
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formatBytes(b.summary.ProcessedBytes),
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formatDuration(time.Since(b.start)),
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)
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}
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// SetMinUpdatePause sets b.MinUpdatePause. It satisfies the
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// ArchiveProgressReporter interface.
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func (b *Backup) SetMinUpdatePause(d time.Duration) {
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b.MinUpdatePause = d
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}
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