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