ui/backup: Use progress.Updater for progress updates

cmd/restic/cmd_backup.go

@@ -483,16 +483,12 @@ func runBackup(ctx context.Context, opts BackupOptions, gopts GlobalOptions, ter
 	}
 	progressReporter := backup.NewProgress(progressPrinter,
 		calculateProgressInterval(!gopts.Quiet, gopts.JSON))
+	defer progressReporter.Done()
 
 	if opts.DryRun {
 		repo.SetDryRun()
 	}
 
-	wg, wgCtx := errgroup.WithContext(ctx)
-	cancelCtx, cancel := context.WithCancel(wgCtx)
-	defer cancel()
-	wg.Go(func() error { progressReporter.Run(cancelCtx); return nil })
-
 	if !gopts.JSON {
 		progressPrinter.V("lock repository")
 	}
@@ -590,6 +586,10 @@ func runBackup(ctx context.Context, opts BackupOptions, gopts GlobalOptions, ter
 		targets = []string{filename}
 	}
 
+	wg, wgCtx := errgroup.WithContext(ctx)
+	cancelCtx, cancel := context.WithCancel(wgCtx)
+	defer cancel()
+
 	if !opts.NoScan {
 		sc := archiver.NewScanner(targetFS)
 		sc.SelectByName = selectByNameFilter

internal/ui/backup/progress.go

@@ -1,13 +1,12 @@
 package backup
 
 import (
-	"context"
 	"sync"
 	"time"
 
 	"github.com/restic/restic/internal/archiver"
 	"github.com/restic/restic/internal/restic"
-	"github.com/restic/restic/internal/ui/signals"
+	"github.com/restic/restic/internal/ui/progress"
 )
 
 // A ProgressPrinter can print various progress messages.
@@ -41,9 +40,9 @@ type Summary struct {
 
 // Progress reports progress for the `backup` command.
 type Progress struct {
+	progress.Updater
 	mu sync.Mutex
 
-	interval time.Duration
 	start time.Time
 
 	scanStarted, scanFinished bool
@@ -52,66 +51,37 @@ type Progress struct {
 	processed, total Counter
 	errors           uint
 
-	closed chan struct{}
-
 	summary Summary
 	printer ProgressPrinter
 }
 
 func NewProgress(printer ProgressPrinter, interval time.Duration) *Progress {
-	return &Progress{
-		interval: interval,
+	p := &Progress{
 		start:        time.Now(),
-
 		currentFiles: make(map[string]struct{}),
-		closed:       make(chan struct{}),
-
 		printer:      printer,
 	}
-}
-
-// Run regularly updates the status lines. It should be called in a separate
-// goroutine.
-func (p *Progress) Run(ctx context.Context) {
-	defer close(p.closed)
-	// Reset status when finished
-	defer p.printer.Reset()
-
-	var tick <-chan time.Time
-	if p.interval != 0 {
-		t := time.NewTicker(p.interval)
-		defer t.Stop()
-		tick = t.C
-	}
-
-	signalsCh := signals.GetProgressChannel()
-
-	for {
-		var now time.Time
-		select {
-		case <-ctx.Done():
-			return
-		case now = <-tick:
-		case <-signalsCh:
-			now = time.Now()
-		}
-
+	p.Updater = *progress.NewUpdater(interval, func(runtime time.Duration, final bool) {
+		if final {
+			p.printer.Reset()
+		} else {
 			p.mu.Lock()
+			defer p.mu.Unlock()
 			if !p.scanStarted {
-			p.mu.Unlock()
-			continue
+				return
 			}
 
 			var secondsRemaining uint64
 			if p.scanFinished {
-			secs := float64(now.Sub(p.start) / time.Second)
+				secs := float64(runtime / time.Second)
 				todo := float64(p.total.Bytes - p.processed.Bytes)
 				secondsRemaining = uint64(secs / float64(p.processed.Bytes) * todo)
 			}
 
 			p.printer.Update(p.total, p.processed, p.errors, p.currentFiles, p.start, secondsRemaining)
-		p.mu.Unlock()
 		}
+	})
+	return p
 }
 
 // Error is the error callback function for the archiver, it prints the error and returns nil.
@@ -236,6 +206,6 @@ func (p *Progress) ReportTotal(item string, s archiver.ScanStats) {
 // Finish prints the finishing messages.
 func (p *Progress) Finish(snapshotID restic.ID, dryrun bool) {
 	// wait for the status update goroutine to shut down
-	<-p.closed
+	p.Updater.Done()
 	p.printer.Finish(snapshotID, p.start, &p.summary, dryrun)
 }

internal/ui/backup/progress_test.go

@@ -1,7 +1,6 @@
 package backup
 
 import (
-	"context"
 	"sync"
 	"testing"
 	"time"
@@ -53,9 +52,6 @@ func TestProgress(t *testing.T) {
 	prnt := &mockPrinter{}
 	prog := NewProgress(prnt, time.Millisecond)
 
-	ctx, cancel := context.WithCancel(context.Background())
-	go prog.Run(ctx)
-
 	prog.StartFile("foo")
 	prog.CompleteBlob(1024)
 
@@ -67,7 +63,6 @@ func TestProgress(t *testing.T) {
 	prog.CompleteItem("foo", nil, &node, archiver.ItemStats{}, 0)
 
 	time.Sleep(10 * time.Millisecond)
-	cancel()
 	id := restic.NewRandomID()
 	prog.Finish(id, false)