normalize observe usage, ensure deferred closers (#5006)

some housecleaning before reviewing deadlock issues

---

#### Does this PR need a docs update or release note?

- [x] ⛔ No

#### Type of change

- [x] 🧹 Tech Debt/Cleanup

#### Test Plan

- [x] ⚡ Unit test

src/cli/export/export.go

@@ -13,6 +13,7 @@ import (
 	"github.com/alcionai/corso/src/cli/utils"
 	"github.com/alcionai/corso/src/internal/data"
 	"github.com/alcionai/corso/src/internal/observe"
+	"github.com/alcionai/corso/src/internal/operations"
 	"github.com/alcionai/corso/src/pkg/control"
 	"github.com/alcionai/corso/src/pkg/dttm"
 	"github.com/alcionai/corso/src/pkg/export"
@@ -96,7 +97,7 @@ func runExport(
 		return Only(ctx, clues.Wrap(err, "Failed to initialize "+serviceName+" export"))
 	}
 
-	expColl, err := eo.Run(ctx)
+	collections, err := eo.Run(ctx)
 	if err != nil {
 		if errors.Is(err, data.ErrNotFound) {
 			return Only(ctx, clues.New("Backup or backup details missing for id "+backupID))
@@ -105,20 +106,8 @@ func runExport(
 		return Only(ctx, clues.Wrap(err, "Failed to run "+serviceName+" export"))
 	}
 
-	// It would be better to give a progressbar than a spinner, but we
+	if err = showExportProgress(ctx, eo, collections, exportLocation); err != nil {
-	// have any way of knowing how many files are available as of now.
+		return err
-	diskWriteComplete := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Writing data to disk")
-
-	err = export.ConsumeExportCollections(ctx, exportLocation, expColl, eo.Errors)
-
-	// The progressbar has to be closed before we move on as the Infof
-	// below flushes progressbar to prevent clobbering the output and
-	// that causes the entire export operation to stall indefinitely.
-	// https://github.com/alcionai/corso/blob/8102523dc62c001b301cd2ab4e799f86146ab1a0/src/cli/print/print.go#L151
-	close(diskWriteComplete)
-
-	if err != nil {
-		return Only(ctx, err)
 	}
 
 	if len(eo.Errors.Recovered()) > 0 {
@@ -142,3 +131,23 @@ func runExport(
 
 	return nil
 }
+
+// slim wrapper that allows us to defer the progress bar closure with the expected scope.
+func showExportProgress(
+	ctx context.Context,
+	op operations.ExportOperation,
+	collections []export.Collectioner,
+	exportLocation string,
+) error {
+	// It would be better to give a progressbar than a spinner, but we
+	// have any way of knowing how many files are available as of now.
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Writing data to disk")
+	defer close(progressMessage)
+
+	err := export.ConsumeExportCollections(ctx, exportLocation, collections, op.Errors)
+	if err != nil {
+		return Only(ctx, err)
+	}
+
+	return nil
+}

src/internal/m365/collection/drive/collection.go

@@ -462,14 +462,12 @@ func (oc *Collection) streamItems(ctx context.Context, errs *fault.Bus) {
 		return
 	}
 
-	displayPath := oc.handler.FormatDisplayPath(oc.driveName, parentPath)
+	progressMessage := observe.ProgressWithCount(
-
-	folderProgress := observe.ProgressWithCount(
 		ctx,
 		observe.ItemQueueMsg,
-		path.NewElements(displayPath),
+		path.NewElements(oc.handler.FormatDisplayPath(oc.driveName, parentPath)),
 		int64(len(oc.driveItems)))
-	defer close(folderProgress)
+	defer close(progressMessage)
 
 	semaphoreCh := make(chan struct{}, graph.Parallelism(path.OneDriveService).Item())
 	defer close(semaphoreCh)
@@ -500,7 +498,7 @@ func (oc *Collection) streamItems(ctx context.Context, errs *fault.Bus) {
 				oc.ctrl.ItemExtensionFactory,
 				errs)
 
-			folderProgress <- struct{}{}
+			progressMessage <- struct{}{}
 		}(item)
 	}
 
@@ -546,7 +544,7 @@ func (lig *lazyItemGetter) GetData(
 	lig.info.Extension.Data = extData.Data
 
 	// display/log the item download
-	progReader, _ := observe.ItemProgress(
+	progReader := observe.ItemProgress(
 		ctx,
 		extRc,
 		observe.ItemBackupMsg,
@@ -656,7 +654,7 @@ func (oc *Collection) streamDriveItem(
 	}
 
 	metaReader := lazy.NewLazyReadCloser(func() (io.ReadCloser, error) {
-		progReader, _ := observe.ItemProgress(
+		progReader := observe.ItemProgress(
 			ctx,
 			itemMeta,
 			observe.ItemBackupMsg,

src/internal/m365/collection/drive/restore.go

@@ -796,8 +796,7 @@ func restoreFile(
 
 	var (
 		written        int64
-		progReader       io.ReadCloser
+		progressReader io.ReadCloser
-		closeProgressBar func()
 	)
 
 	// This is just to retry file upload, the uploadSession creation is
@@ -824,21 +823,23 @@ func restoreFile(
 			iReader = itemData.ToReader()
 		}
 
-		progReader, closeProgressBar = observe.ItemProgress(
+		progressReader = observe.ItemProgress(
 			ctx,
 			iReader,
 			observe.ItemRestoreMsg,
 			clues.Hide(pname),
 			ss.Size())
+		defer progressReader.Close()
 
 		// Upload the stream data
-		written, err = io.CopyBuffer(w, progReader, copyBuffer)
+		written, err = io.CopyBuffer(w, progressReader, copyBuffer)
 		if err == nil {
 			break
 		}
 
-		// clear out the progress bar immediately on error
+		// close the progress bar immediately on error, else we might deadlock
-		closeProgressBar()
+		// its safe to double call Close on the reader.
+		progressReader.Close()
 
 		// refresh the io.Writer to restart the upload
 		// TODO: @vkamra verify if var session is the desired input
@@ -853,8 +854,6 @@ func restoreFile(
 		return "", details.ItemInfo{}, clues.Wrap(err, "uploading file")
 	}
 
-	defer closeProgressBar()
-
 	dii := ir.AugmentItemInfo(
 		details.ItemInfo{},
 		rcc.ProtectedResource,

src/internal/m365/collection/exchange/backup.go

@@ -60,16 +60,14 @@ func CreateCollections(
 		return nil, clues.NewWC(ctx, "unsupported backup category type")
 	}
 
-	pcfg := observe.ProgressCfg{
+	progressMessage := observe.MessageWithCompletion(
+		ctx,
+		observe.ProgressCfg{
 			Indent:            1,
 			CompletionMessage: func() string { return fmt.Sprintf("(found %d folders)", len(collections)) },
-	}
+		},
-	foldersComplete := observe.MessageWithCompletion(
-		ctx,
-		pcfg,
 		qp.Category.HumanString())
-
+	defer close(progressMessage)
-	defer close(foldersComplete)
 
 	rootFolder, cc := handler.NewContainerCache(bpc.ProtectedResource.ID())
 

src/internal/m365/collection/exchange/collection.go

@@ -191,8 +191,7 @@ func (col *prefetchCollection) streamItems(
 		success         int64
 		totalBytes      int64
 		wg              sync.WaitGroup
-		colProgress chan<- struct{}
+		progressMessage chan<- struct{}
-
 		user            = col.user
 	)
 
@@ -216,11 +215,11 @@ func (col *prefetchCollection) streamItems(
 	}()
 
 	if len(col.added)+len(col.removed) > 0 {
-		colProgress = observe.CollectionProgress(
+		progressMessage = observe.CollectionProgress(
 			ctx,
 			col.Category().HumanString(),
 			col.LocationPath().Elements())
-		defer close(colProgress)
+		defer close(progressMessage)
 	}
 
 	semaphoreCh := make(chan struct{}, col.Opts().Parallelism.ItemFetch)
@@ -244,8 +243,8 @@ func (col *prefetchCollection) streamItems(
 
 			atomic.AddInt64(&success, 1)
 
-			if colProgress != nil {
+			if progressMessage != nil {
-				colProgress <- struct{}{}
+				progressMessage <- struct{}{}
 			}
 		}(id)
 	}
@@ -333,8 +332,8 @@ func (col *prefetchCollection) streamItems(
 			atomic.AddInt64(&success, 1)
 			atomic.AddInt64(&totalBytes, info.Size)
 
-			if colProgress != nil {
+			if progressMessage != nil {
-				colProgress <- struct{}{}
+				progressMessage <- struct{}{}
 			}
 		}(id)
 	}
@@ -390,7 +389,7 @@ func (col *lazyFetchCollection) streamItems(
 ) {
 	var (
 		success         int64
-		colProgress chan<- struct{}
+		progressMessage chan<- struct{}
 
 		user = col.user
 	)
@@ -408,11 +407,11 @@ func (col *lazyFetchCollection) streamItems(
 	}()
 
 	if len(col.added)+len(col.removed) > 0 {
-		colProgress = observe.CollectionProgress(
+		progressMessage = observe.CollectionProgress(
 			ctx,
 			col.Category().HumanString(),
 			col.LocationPath().Elements())
-		defer close(colProgress)
+		defer close(progressMessage)
 	}
 
 	// delete all removed items
@@ -421,8 +420,8 @@ func (col *lazyFetchCollection) streamItems(
 
 		atomic.AddInt64(&success, 1)
 
-		if colProgress != nil {
+		if progressMessage != nil {
-			colProgress <- struct{}{}
+			progressMessage <- struct{}{}
 		}
 	}
 
@@ -458,8 +457,8 @@ func (col *lazyFetchCollection) streamItems(
 
 		atomic.AddInt64(&success, 1)
 
-		if colProgress != nil {
+		if progressMessage != nil {
-			colProgress <- struct{}{}
+			progressMessage <- struct{}{}
 		}
 	}
 }

src/internal/m365/collection/exchange/restore.go

@@ -47,11 +47,11 @@ func RestoreCollection(
 		category = fullPath.Category()
 	)
 
-	colProgress := observe.CollectionProgress(
+	progressMessage := observe.CollectionProgress(
 		ctx,
 		category.HumanString(),
 		fullPath.Folder(false))
-	defer close(colProgress)
+	defer close(progressMessage)
 
 	for {
 		select {
@@ -119,7 +119,7 @@ func RestoreCollection(
 				logger.Ctx(ictx).Infow("accounting for restored item", "error", err)
 			}
 
-			colProgress <- struct{}{}
+			progressMessage <- struct{}{}
 		}
 	}
 }

src/internal/m365/collection/groups/collection.go

@@ -131,7 +131,7 @@ func (col *prefetchCollection[C, I]) streamItems(ctx context.Context, errs *faul
 		streamedItems   int64
 		totalBytes      int64
 		wg              sync.WaitGroup
-		colProgress   chan<- struct{}
+		progressMessage chan<- struct{}
 		el              = errs.Local()
 	)
 
@@ -154,11 +154,11 @@ func (col *prefetchCollection[C, I]) streamItems(ctx context.Context, errs *faul
 	}()
 
 	if len(col.added)+len(col.removed) > 0 {
-		colProgress = observe.CollectionProgress(
+		progressMessage = observe.CollectionProgress(
 			ctx,
 			col.Category().HumanString(),
 			col.LocationPath().Elements())
-		defer close(colProgress)
+		defer close(progressMessage)
 	}
 
 	semaphoreCh := make(chan struct{}, col.Opts().Parallelism.ItemFetch)
@@ -179,8 +179,8 @@ func (col *prefetchCollection[C, I]) streamItems(ctx context.Context, errs *faul
 			atomic.AddInt64(&streamedItems, 1)
 			col.Counter.Inc(count.StreamItemsRemoved)
 
-			if colProgress != nil {
+			if progressMessage != nil {
-				colProgress <- struct{}{}
+				progressMessage <- struct{}{}
 			}
 		}(id)
 	}
@@ -254,8 +254,8 @@ func (col *prefetchCollection[C, I]) streamItems(ctx context.Context, errs *faul
 
 			col.Counter.Add(count.StreamBytesAdded, info.Size)
 
-			if colProgress != nil {
+			if progressMessage != nil {
-				colProgress <- struct{}{}
+				progressMessage <- struct{}{}
 			}
 		}(id)
 	}
@@ -296,7 +296,7 @@ func (col *lazyFetchCollection[C, I]) streamItems(ctx context.Context, errs *fau
 	var (
 		streamedItems   int64
 		wg              sync.WaitGroup
-		colProgress   chan<- struct{}
+		progressMessage chan<- struct{}
 		el              = errs.Local()
 	)
 
@@ -319,11 +319,11 @@ func (col *lazyFetchCollection[C, I]) streamItems(ctx context.Context, errs *fau
 	}()
 
 	if len(col.added)+len(col.removed) > 0 {
-		colProgress = observe.CollectionProgress(
+		progressMessage = observe.CollectionProgress(
 			ctx,
 			col.Category().HumanString(),
 			col.LocationPath().Elements())
-		defer close(colProgress)
+		defer close(progressMessage)
 	}
 
 	semaphoreCh := make(chan struct{}, col.Opts().Parallelism.ItemFetch)
@@ -344,8 +344,8 @@ func (col *lazyFetchCollection[C, I]) streamItems(ctx context.Context, errs *fau
 			atomic.AddInt64(&streamedItems, 1)
 			col.Counter.Inc(count.StreamItemsRemoved)
 
-			if colProgress != nil {
+			if progressMessage != nil {
-				colProgress <- struct{}{}
+				progressMessage <- struct{}{}
 			}
 		}(id)
 	}
@@ -386,8 +386,8 @@ func (col *lazyFetchCollection[C, I]) streamItems(ctx context.Context, errs *fau
 
 			atomic.AddInt64(&streamedItems, 1)
 
-			if colProgress != nil {
+			if progressMessage != nil {
-				colProgress <- struct{}{}
+				progressMessage <- struct{}{}
 			}
 		}(id, modTime)
 	}

src/internal/m365/collection/site/backup.go

@@ -58,12 +58,14 @@ func CollectLibraries(
 		path.LibrariesCategory.HumanString(),
 		stdpath.Base(bpc.ProtectedResource.Name()))
 
-	pcfg := observe.ProgressCfg{
+	progressMessage := observe.MessageWithCompletion(
+		ctx,
+		observe.ProgressCfg{
 			Indent:            1,
 			CompletionMessage: func() string { return fmt.Sprintf("(found %d items)", colls.NumItems) },
-	}
+		},
-	progressBar := observe.MessageWithCompletion(ctx, pcfg, msg)
+		msg)
-	close(progressBar)
+	close(progressMessage)
 
 	odcs, canUsePreviousBackup, err := colls.Get(ctx, bpc.MetadataCollections, ssmb, errs)
 	if err != nil {

src/internal/m365/collection/site/collection.go

@@ -184,9 +184,11 @@ func (pc *prefetchCollection) streamLists(
 		pc.fullPath,
 		&metrics)
 
-	// TODO: Insert correct ID for CollectionProgress
+	progressMessage := observe.CollectionProgress(
-	progress := observe.CollectionProgress(ctx, pc.fullPath.Category().HumanString(), pc.fullPath.Folders())
+		ctx,
-	defer close(progress)
+		pc.fullPath.Category().HumanString(),
+		pc.fullPath.Folders())
+	defer close(progressMessage)
 
 	semaphoreCh := make(chan struct{}, fetchChannelSize)
 	defer close(semaphoreCh)
@@ -204,7 +206,7 @@ func (pc *prefetchCollection) streamLists(
 		go pc.handleListItems(
 			ctx,
 			semaphoreCh,
-			progress,
+			progressMessage,
 			&wg,
 			listID,
 			&objects,
@@ -238,8 +240,11 @@ func (pc *prefetchCollection) streamPages(
 		&metrics)
 
 	// TODO: Insert correct ID for CollectionProgress
-	progress := observe.CollectionProgress(ctx, pc.fullPath.Category().HumanString(), pc.fullPath.Folders())
+	progressMessage := observe.CollectionProgress(
-	defer close(progress)
+		ctx,
+		pc.fullPath.Category().HumanString(),
+		pc.fullPath.Folders())
+	defer close(progressMessage)
 
 	betaService := pc.betaService
 	if betaService == nil {
@@ -299,7 +304,7 @@ func (pc *prefetchCollection) streamPages(
 		}
 
 		pc.stream[path.PagesCategory] <- item
-		progress <- struct{}{}
+		progressMessage <- struct{}{}
 	}
 }
 
@@ -453,8 +458,11 @@ func (lc *lazyFetchCollection) streamItems(
 		lc.fullPath,
 		&metrics)
 
-	progress := observe.CollectionProgress(ctx, lc.fullPath.Category().HumanString(), lc.fullPath.Folders())
+	progressMessage := observe.CollectionProgress(
-	defer close(progress)
+		ctx,
+		lc.fullPath.Category().HumanString(),
+		lc.fullPath.Folders())
+	defer close(progressMessage)
 
 	for listID, modTime := range lc.items {
 		if el.Failure() != nil {
@@ -475,7 +483,7 @@ func (lc *lazyFetchCollection) streamItems(
 
 		metrics.Successes++
 
-		progress <- struct{}{}
+		progressMessage <- struct{}{}
 	}
 
 	metrics.Objects += int(numLists)

src/internal/m365/service/groups/backup.go

@@ -264,14 +264,15 @@ func backupChannels(
 		canUsePreviousBackup bool
 	)
 
-	pcfg := observe.ProgressCfg{
+	progressMessage := observe.MessageWithCompletion(
+		ctx,
+		observe.ProgressCfg{
 			Indent: 1,
 			// TODO(meain): Use number of messages and not channels
 			CompletionMessage: func() string { return fmt.Sprintf("(found %d channels)", len(colls)) },
-	}
+		},
-	progressBar := observe.MessageWithCompletion(ctx, pcfg, scope.Category().PathType().HumanString())
+		scope.Category().PathType().HumanString())
-
+	defer close(progressMessage)
-	defer close(progressBar)
 
 	if !api.IsTeam(ctx, bc.group) {
 		return colls, nil
@@ -325,13 +326,14 @@ func backupConversations(
 		colls []data.BackupCollection
 	)
 
-	pcfg := observe.ProgressCfg{
+	progressMessage := observe.MessageWithCompletion(
+		ctx,
+		observe.ProgressCfg{
 			Indent:            1,
 			CompletionMessage: func() string { return fmt.Sprintf("(found %d conversations)", len(colls)) },
-	}
+		},
-	progressBar := observe.MessageWithCompletion(ctx, pcfg, scope.Category().PathType().HumanString())
+		scope.Category().PathType().HumanString())
-
+	defer close(progressMessage)
-	defer close(progressBar)
 
 	useLazyReader := !bc.producerConfig.Options.ToggleFeatures.DisableLazyItemReader
 

src/internal/m365/service/onedrive/backup.go

@@ -62,13 +62,14 @@ func ProduceBackupCollections(
 			bpc.Options,
 			counter)
 
-		pcfg := observe.ProgressCfg{
+		progressMessage := observe.MessageWithCompletion(
+			ctx,
+			observe.ProgressCfg{
 				Indent:            1,
 				CompletionMessage: func() string { return fmt.Sprintf("(found %d files)", nc.NumFiles) },
-		}
+			},
-		progressBar := observe.MessageWithCompletion(ctx, pcfg, path.FilesCategory.HumanString())
+			path.FilesCategory.HumanString())
-
+		defer close(progressMessage)
-		defer close(progressBar)
 
 		odcs, canUsePreviousBackup, err = nc.Get(ctx, bpc.MetadataCollections, ssmb, errs)
 		if err != nil {

src/internal/observe/observe.go

@@ -178,6 +178,10 @@ type ProgressCfg struct {
 	CompletionMessage func() string
 }
 
+func DefaultCfg() ProgressCfg {
+	return ProgressCfg{}
+}
+
 // Message is used to display a progress message
 func Message(ctx context.Context, cfg ProgressCfg, msgs ...any) {
 	var (
@@ -351,10 +355,12 @@ func (ac *autoCloser) Read(p []byte) (n int, err error) {
 }
 
 func (ac *autoCloser) Close() error {
-	if !ac.closed {
+	if ac.closed {
+		return nil
+	}
+
 	ac.closed = true
 	ac.close()
-	}
 
 	return ac.rc.Close()
 }
@@ -362,15 +368,16 @@ func (ac *autoCloser) Close() error {
 // ItemProgress tracks the display of an item in a folder by counting the bytes
 // read through the provided readcloser, up until the byte count matches
 // the totalBytes.
+//
 // The progress bar will close automatically when the reader closes.  If an early
-// close is needed due to abort or other issue, the returned func can be used.
+// close is needed due to abort or other issue, the reader can be closed manually.
 func ItemProgress(
 	ctx context.Context,
 	rc io.ReadCloser,
 	header string,
 	iname any,
 	totalBytes int64,
-) (io.ReadCloser, func()) {
+) io.ReadCloser {
 	var (
 		obs   = getObserver(ctx)
 		plain = plainString(iname)
@@ -383,7 +390,7 @@ func ItemProgress(
 
 	if obs.hidden() || rc == nil {
 		defer log.Debug("done - " + header)
-		return rc, func() {}
+		return rc
 	}
 
 	obs.wg.Add(1)
@@ -410,22 +417,24 @@ func ItemProgress(
 	closer := &autoCloser{rc: bar.ProxyReader(rc)}
 
 	closer.close = func() {
-		closer.closed = true
 		bar.SetTotal(-1, true)
 		bar.Abort(true)
 	}
 
-	return closer, closer.close
+	return closer
 }
 
 // ItemSpinner is similar to ItemProgress, but for use in cases where
 // we don't know the file size but want to show progress.
+//
+// The progress bar will close automatically when the reader closes.  If an early
+// close is needed due to abort or other issue, the reader can be closed manually.
 func ItemSpinner(
 	ctx context.Context,
 	rc io.ReadCloser,
 	header string,
 	iname any,
-) (io.ReadCloser, func()) {
+) io.ReadCloser {
 	var (
 		obs   = getObserver(ctx)
 		plain = plainString(iname)
@@ -436,7 +445,7 @@ func ItemSpinner(
 
 	if obs.hidden() || rc == nil {
 		defer log.Debug("done - " + header)
-		return rc, func() {}
+		return rc
 	}
 
 	obs.wg.Add(1)
@@ -459,12 +468,14 @@ func ItemSpinner(
 		log.Debug("done - " + header)
 	})()
 
-	abort := func() {
+	closer := &autoCloser{rc: bar.ProxyReader(rc)}
+
+	closer.close = func() {
 		bar.SetTotal(-1, true)
 		bar.Abort(true)
 	}
 
-	return bar.ProxyReader(rc), abort
+	return closer
 }
 
 // ProgressWithCount tracks the display of a bar that tracks the completion

src/internal/observe/observe_test.go

@@ -45,14 +45,13 @@ func (suite *ObserveProgressUnitSuite) TestObserve_ItemProgress() {
 	ctx = SeedObserver(ctx, &recorder, config{})
 
 	from := make([]byte, 100)
-	prog, abort := ItemProgress(
+	prog := ItemProgress(
 		ctx,
 		io.NopCloser(bytes.NewReader(from)),
 		"folder",
 		tst,
 		100)
 	require.NotNil(t, prog)
-	require.NotNil(t, abort)
 
 	var i int
 

src/internal/operations/backup.go

@@ -522,8 +522,8 @@ func produceBackupDataCollections(
 	counter *count.Bus,
 	errs *fault.Bus,
 ) ([]data.BackupCollection, prefixmatcher.StringSetReader, bool, error) {
-	progressBar := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Discovering items to backup")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Discovering items to backup")
-	defer close(progressBar)
+	defer close(progressMessage)
 
 	bpc := inject.BackupProducerConfig{
 		LastBackupVersion:   lastBackupVersion,
@@ -559,8 +559,8 @@ func consumeBackupCollections(
 		"collection_source", "operations",
 		"snapshot_type", "item data")
 
-	progressBar := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Backing up data")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Backing up data")
-	defer close(progressBar)
+	defer close(progressMessage)
 
 	tags := map[string]string{
 		kopia.TagBackupID:       string(backupID),

src/internal/operations/export.go

@@ -249,16 +249,14 @@ func (op *ExportOperation) do(
 		observe.ProgressCfg{},
 		fmt.Sprintf("Discovered %d items in backup %s to export", len(paths), op.BackupID))
 
-	kopiaComplete := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Enumerating items in repository")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Enumerating items in repository")
-	defer close(kopiaComplete)
+	defer close(progressMessage)
 
 	dcs, err := op.kopia.ProduceRestoreCollections(ctx, bup.SnapshotID, paths, opStats.bytesRead, op.Errors)
 	if err != nil {
 		return nil, clues.Wrap(err, "producing collections to export")
 	}
 
-	kopiaComplete <- struct{}{}
-
 	ctx = clues.Add(ctx, "coll_count", len(dcs))
 
 	// should always be 1, since backups are 1:1 with resourceOwners.
@@ -340,11 +338,8 @@ func produceExportCollections(
 	exportStats *metrics.ExportStats,
 	errs *fault.Bus,
 ) ([]export.Collectioner, error) {
-	complete := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Preparing export")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Preparing export")
-	defer func() {
+	defer close(progressMessage)
-		complete <- struct{}{}
-		close(complete)
-	}()
 
 	ctx, end := diagnostics.Span(ctx, "m365:export")
 	defer end()

src/internal/operations/restore.go

@@ -282,8 +282,8 @@ func (op *RestoreOperation) do(
 		observe.ProgressCfg{},
 		fmt.Sprintf("Discovered %d items in backup %s to restore", len(paths), op.BackupID))
 
-	progressBar := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Enumerating items in repository")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Enumerating items in repository")
-	defer close(progressBar)
+	defer close(progressMessage)
 
 	dcs, err := op.kopia.ProduceRestoreCollections(
 		ctx,
@@ -394,8 +394,8 @@ func consumeRestoreCollections(
 		return nil, nil, clues.New("no data collections to restore")
 	}
 
-	progressBar := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Restoring data")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Restoring data")
-	defer close(progressBar)
+	defer close(progressMessage)
 
 	ctx, end := diagnostics.Span(ctx, "operations:restore")
 	defer end()

src/pkg/export/consume.go

@@ -50,14 +50,14 @@ func writeItem(ctx context.Context, item Item, folder string) error {
 	name := item.Name
 	fpath := filepath.Join(folder, name)
 
-	progReader, pclose := observe.ItemSpinner(
+	progReader := observe.ItemSpinner(
 		ctx,
 		item.Body,
 		observe.ItemExportMsg,
 		clues.Hide(name))
 
 	defer item.Body.Close()
-	defer pclose()
+	defer progReader.Close()
 
 	err := os.MkdirAll(folder, os.ModePerm)
 	if err != nil {

src/pkg/repository/data_providers.go

@@ -90,8 +90,8 @@ func connectToM365(
 		return ctrl, nil
 	}
 
-	progressBar := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Connecting to M365")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Connecting to M365")
-	defer close(progressBar)
+	defer close(progressMessage)
 
 	ctrl, err := m365.NewController(
 		ctx,

src/pkg/repository/repository.go

@@ -191,8 +191,8 @@ func (r *repository) Connect(ctx context.Context, cfg ConnConfig) (err error) {
 		return clues.Stack(err)
 	}
 
-	progressBar := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Connecting to repository")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Connecting to repository")
-	defer close(progressBar)
+	defer close(progressMessage)
 
 	if err := r.setupKopia(ctx, ctrlRepo.Retention{}, false); err != nil {
 		return clues.Stack(err)
@@ -214,8 +214,8 @@ func (r *repository) UpdatePassword(ctx context.Context, password string) (err e
 		}
 	}()
 
-	progressBar := observe.MessageWithCompletion(ctx, observe.ProgressCfg{}, "Connecting to repository")
+	progressMessage := observe.MessageWithCompletion(ctx, observe.DefaultCfg(), "Connecting to repository")
-	defer close(progressBar)
+	defer close(progressMessage)
 
 	repoNameHash, err := r.GenerateHashForRepositoryConfigFileName()
 	if err != nil {