Merge pull request restic#4315 from MichaelEischer/restore-hardlink-p…

…rogress

restore: Correctly account for hardlinks in progress bar

internal/restorer/restorer.go

@@ -166,12 +166,14 @@ func (res *Restorer) restoreNodeTo(ctx context.Context, node *restic.Node, targe
 	err := node.CreateAt(ctx, target, res.repo)
 	if err != nil {
 		debug.Log("node.CreateAt(%s) error %v", target, err)
+		return err
 	}
-	if err == nil {
-		err = res.restoreNodeMetadataTo(node, target, location)
+
+	if res.progress != nil {
+		res.progress.AddProgress(location, 0, 0)
 	}
 
-	return err
+	return res.restoreNodeMetadataTo(node, target, location)
 }
 
 func (res *Restorer) restoreNodeMetadataTo(node *restic.Node, target, location string) error {
@@ -239,6 +241,9 @@ func (res *Restorer) RestoreTo(ctx context.Context, dst string) error {
 	_, err = res.traverseTree(ctx, dst, string(filepath.Separator), *res.sn.Tree, treeVisitor{
 		enterDir: func(node *restic.Node, target, location string) error {
 			debug.Log("first pass, enterDir: mkdir %q, leaveDir should restore metadata", location)
+			if res.progress != nil {
+				res.progress.AddFile(0)
+			}
 			// create dir with default permissions
 			// #leaveDir restores dir metadata after visiting all children
 			return fs.MkdirAll(target, 0700)
@@ -254,24 +259,34 @@ func (res *Restorer) RestoreTo(ctx context.Context, dst string) error {
 			}
 
 			if node.Type != "file" {
+				if res.progress != nil {
+					res.progress.AddFile(0)
+				}
 				return nil
 			}
 
-			if res.progress != nil {
-				res.progress.AddFile(node.Size)
-			}
-
 			if node.Size == 0 {
+				if res.progress != nil {
+					res.progress.AddFile(node.Size)
+				}
 				return nil // deal with empty files later
 			}
 
 			if node.Links > 1 {
 				if idx.Has(node.Inode, node.DeviceID) {
+					if res.progress != nil {
+						// a hardlinked file does not increase the restore size
+						res.progress.AddFile(0)
+					}
 					return nil
 				}
 				idx.Add(node.Inode, node.DeviceID, location)
 			}
 
+			if res.progress != nil {
+				res.progress.AddFile(node.Size)
+			}
+
 			filerestorer.addFile(location, node.Content, int64(node.Size))
 
 			return nil
@@ -310,7 +325,13 @@ func (res *Restorer) RestoreTo(ctx context.Context, dst string) error {
 
 			return res.restoreNodeMetadataTo(node, target, location)
 		},
-		leaveDir: res.restoreNodeMetadataTo,
+		leaveDir: func(node *restic.Node, target, location string) error {
+			err := res.restoreNodeMetadataTo(node, target, location)
+			if err == nil && res.progress != nil {
+				res.progress.AddProgress(location, 0, 0)
+			}
+			return err
+		},
 	})
 	return err
 }

internal/restorer/restorer_unix_test.go

@@ -9,10 +9,12 @@ import (
 	"path/filepath"
 	"syscall"
 	"testing"
+	"time"
 
 	"github.com/restic/restic/internal/repository"
 	"github.com/restic/restic/internal/restic"
 	rtest "github.com/restic/restic/internal/test"
+	restoreui "github.com/restic/restic/internal/ui/restore"
 )
 
 func TestRestorerRestoreEmptyHardlinkedFileds(t *testing.T) {
@@ -66,3 +68,56 @@ func getBlockCount(t *testing.T, filename string) int64 {
 	}
 	return st.Blocks
 }
+
+type printerMock struct {
+	filesFinished, filesTotal, allBytesWritten, allBytesTotal uint64
+}
+
+func (p *printerMock) Update(filesFinished, filesTotal, allBytesWritten, allBytesTotal uint64, duration time.Duration) {
+}
+func (p *printerMock) Finish(filesFinished, filesTotal, allBytesWritten, allBytesTotal uint64, duration time.Duration) {
+	p.filesFinished = filesFinished
+	p.filesTotal = filesTotal
+	p.allBytesWritten = allBytesWritten
+	p.allBytesTotal = allBytesTotal
+}
+
+func TestRestorerProgressBar(t *testing.T) {
+	repo := repository.TestRepository(t)
+
+	sn, _ := saveSnapshot(t, repo, Snapshot{
+		Nodes: map[string]Node{
+			"dirtest": Dir{
+				Nodes: map[string]Node{
+					"file1": File{Links: 2, Inode: 1, Data: "foo"},
+					"file2": File{Links: 2, Inode: 1, Data: "foo"},
+				},
+			},
+			"file2": File{Links: 1, Inode: 2, Data: "example"},
+		},
+	})
+
+	mock := &printerMock{}
+	progress := restoreui.NewProgress(mock, 0)
+	res := NewRestorer(context.TODO(), repo, sn, false, progress)
+	res.SelectFilter = func(item string, dstpath string, node *restic.Node) (selectedForRestore bool, childMayBeSelected bool) {
+		return true, true
+	}
+
+	tempdir := rtest.TempDir(t)
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	err := res.RestoreTo(ctx, tempdir)
+	rtest.OK(t, err)
+	progress.Finish()
+
+	const filesFinished = 4
+	const filesTotal = filesFinished
+	const allBytesWritten = 10
+	const allBytesTotal = allBytesWritten
+	rtest.Assert(t, mock.filesFinished == filesFinished, "filesFinished: expected %v, got %v", filesFinished, mock.filesFinished)
+	rtest.Assert(t, mock.filesTotal == filesTotal, "filesTotal: expected %v, got %v", filesTotal, mock.filesTotal)
+	rtest.Assert(t, mock.allBytesWritten == allBytesWritten, "allBytesWritten: expected %v, got %v", allBytesWritten, mock.allBytesWritten)
+	rtest.Assert(t, mock.allBytesTotal == allBytesTotal, "allBytesTotal: expected %v, got %v", allBytesTotal, mock.allBytesTotal)
+}