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Merge pull request #1900 from restic/fix-1870

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restorer: Add test for restore with include filter
This commit is contained in:
Alexander Neumann 2018-07-23 20:15:50 +02:00
commit 1aeb193fd9
2 changed files with 260 additions and 37 deletions
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45
internal/restorer/restorer.go
View file

@ -99,36 +99,16 @@ func (res *Restorer) traverseTree(ctx context.Context, target, location string,
return err
}
enteredDir := false
if node.Type == "dir" {
if node.Subtree == nil {
return errors.Errorf("Dir without subtree in tree %v", treeID.Str())
}
// ifedorenko: apparently a dir can be selected explicitly or implicitly when a child is selected
// to support implicit selection, visit the directory from within visitor#visitNode
if selectedForRestore {
enteredDir = true
err = sanitizeError(visitor.enterDir(node, nodeTarget, nodeLocation))
if err != nil {
return err
}
} else {
_visitor := visitor
visitor = treeVisitor{
enterDir: _visitor.enterDir,
visitNode: func(node *restic.Node, nodeTarget, nodeLocation string) error {
if !enteredDir {
enteredDir = true
derr := sanitizeError(_visitor.enterDir(node, nodeTarget, nodeLocation))
if derr != nil {
return derr
}
}
return _visitor.visitNode(node, nodeTarget, nodeLocation)
},
leaveDir: _visitor.leaveDir,
}
}
if childMayBeSelected {
@ -137,25 +117,21 @@ func (res *Restorer) traverseTree(ctx context.Context, target, location string,
return err
}
}
}
if selectedForRestore && node.Type != "dir" {
err = sanitizeError(visitor.visitNode(node, nodeTarget, nodeLocation))
if err != nil {
err = res.Error(nodeLocation, node, errors.Wrap(err, "restoreNodeTo"))
if selectedForRestore {
err = sanitizeError(visitor.leaveDir(node, nodeTarget, nodeLocation))
if err != nil {
return err
}
}
continue
}
if enteredDir {
err = sanitizeError(visitor.leaveDir(node, nodeTarget, nodeLocation))
if selectedForRestore {
err = sanitizeError(visitor.visitNode(node, nodeTarget, nodeLocation))
if err != nil {
err = res.Error(nodeLocation, node, errors.Wrap(err, "RestoreTimestamps"))
if err != nil {
return err
}
return err
}
}
}
@ -211,6 +187,13 @@ func (res *Restorer) RestoreTo(ctx context.Context, dst string) error {
return fs.MkdirAll(target, 0700)
},
visitNode: func(node *restic.Node, target, location string) error {
// create parent dir with default permissions
// #leaveDir restores dir metadata after visiting all children
err := fs.MkdirAll(filepath.Dir(target), 0700)
if err != nil {
return err
}
return res.restoreNodeTo(ctx, node, target, location, idx)
},
leaveDir: func(node *restic.Node, target, location string) error {

252
internal/restorer/restorer_test.go
View file

@ -1,4 +1,4 @@
package restorer_test
package restorer
import (
"bytes"
@ -13,7 +13,6 @@ import (
"github.com/restic/restic/internal/fs"
"github.com/restic/restic/internal/repository"
"github.com/restic/restic/internal/restic"
"github.com/restic/restic/internal/restorer"
rtest "github.com/restic/restic/internal/test"
)
@ -92,7 +91,7 @@ func saveDir(t testing.TB, repo restic.Repository, nodes map[string]Node) restic
return id
}
func saveSnapshot(t testing.TB, repo restic.Repository, snapshot Snapshot) (restic.Repository, restic.ID) {
func saveSnapshot(t testing.TB, repo restic.Repository, snapshot Snapshot) (*restic.Snapshot, restic.ID) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
@ -119,7 +118,7 @@ func saveSnapshot(t testing.TB, repo restic.Repository, snapshot Snapshot) (rest
t.Fatal(err)
}
return repo, id
return sn, id
}
// toSlash converts the OS specific path dir to a slash-separated path.
@ -134,6 +133,7 @@ func TestRestorer(t *testing.T) {
Files map[string]string
ErrorsMust map[string]string
ErrorsMay map[string]string
Select func(item string, dstpath string, node *restic.Node) (selectForRestore bool, childMayBeSelected bool)
}{
// valid test cases
{
@ -212,6 +212,31 @@ func TestRestorer(t *testing.T) {
"topfile": "top-level file",
},
},
{
Snapshot: Snapshot{
Nodes: map[string]Node{
"dir": Dir{
Nodes: map[string]Node{
"file": File{"content: file\n"},
},
},
},
},
Files: map[string]string{
"dir/file": "content: file\n",
},
Select: func(item, dstpath string, node *restic.Node) (selectedForRestore bool, childMayBeSelected bool) {
switch item {
case filepath.FromSlash("/dir"):
childMayBeSelected = true
case filepath.FromSlash("/dir/file"):
selectedForRestore = true
childMayBeSelected = true
}
return selectedForRestore, childMayBeSelected
},
},
// test cases with invalid/constructed names
{
@ -275,7 +300,7 @@ func TestRestorer(t *testing.T) {
_, id := saveSnapshot(t, repo, test.Snapshot)
t.Logf("snapshot saved as %v", id.Str())
res, err := restorer.NewRestorer(repo, id)
res, err := NewRestorer(repo, id)
if err != nil {
t.Fatal(err)
}
@ -293,6 +318,11 @@ func TestRestorer(t *testing.T) {
item, dstpath, tempdir)
return false, false
}
if test.Select != nil {
return test.Select(item, dstpath, node)
}
return true, true
}
@ -391,7 +421,7 @@ func TestRestorerRelative(t *testing.T) {
_, id := saveSnapshot(t, repo, test.Snapshot)
t.Logf("snapshot saved as %v", id.Str())
res, err := restorer.NewRestorer(repo, id)
res, err := NewRestorer(repo, id)
if err != nil {
t.Fatal(err)
}
@ -436,3 +466,213 @@ func TestRestorerRelative(t *testing.T) {
})
}
}
type TraverseTreeCheck func(testing.TB) treeVisitor
type TreeVisit struct {
funcName string // name of the function
location string // location passed to the function
}
func checkVisitOrder(list []TreeVisit) TraverseTreeCheck {
var pos int
return func(t testing.TB) treeVisitor {
check := func(funcName string) func(*restic.Node, string, string) error {
return func(node *restic.Node, target, location string) error {
if pos >= len(list) {
t.Errorf("step %v, %v(%v): expected no more than %d function calls", pos, funcName, location, len(list))
pos++
return nil
}
v := list[pos]
if v.funcName != funcName {
t.Errorf("step %v, location %v: want function %v, but %v was called",
pos, location, v.funcName, funcName)
}
if location != filepath.FromSlash(v.location) {
t.Errorf("step %v: want location %v, got %v", pos, list[pos].location, location)
}
pos++
return nil
}
}
return treeVisitor{
enterDir: check("enterDir"),
visitNode: check("visitNode"),
leaveDir: check("leaveDir"),
}
}
}
func TestRestorerTraverseTree(t *testing.T) {
var tests = []struct {
Snapshot
Select func(item string, dstpath string, node *restic.Node) (selectForRestore bool, childMayBeSelected bool)
Visitor TraverseTreeCheck
}{
{
// select everything
Snapshot: Snapshot{
Nodes: map[string]Node{
"dir": Dir{Nodes: map[string]Node{
"otherfile": File{"x"},
"subdir": Dir{Nodes: map[string]Node{
"file": File{"content: file\n"},
}},
}},
"foo": File{"content: foo\n"},
},
},
Select: func(item string, dstpath string, node *restic.Node) (selectForRestore bool, childMayBeSelected bool) {
return true, true
},
Visitor: checkVisitOrder([]TreeVisit{
{"enterDir", "/dir"},
{"visitNode", "/dir/otherfile"},
{"enterDir", "/dir/subdir"},
{"visitNode", "/dir/subdir/file"},
{"leaveDir", "/dir/subdir"},
{"leaveDir", "/dir"},
{"visitNode", "/foo"},
}),
},
// select only the top-level file
{
Snapshot: Snapshot{
Nodes: map[string]Node{
"dir": Dir{Nodes: map[string]Node{
"otherfile": File{"x"},
"subdir": Dir{Nodes: map[string]Node{
"file": File{"content: file\n"},
}},
}},
"foo": File{"content: foo\n"},
},
},
Select: func(item string, dstpath string, node *restic.Node) (selectForRestore bool, childMayBeSelected bool) {
if item == "/foo" {
return true, false
}
return false, false
},
Visitor: checkVisitOrder([]TreeVisit{
{"visitNode", "/foo"},
}),
},
{
Snapshot: Snapshot{
Nodes: map[string]Node{
"aaa": File{"content: foo\n"},
"dir": Dir{Nodes: map[string]Node{
"otherfile": File{"x"},
"subdir": Dir{Nodes: map[string]Node{
"file": File{"content: file\n"},
}},
}},
},
},
Select: func(item string, dstpath string, node *restic.Node) (selectForRestore bool, childMayBeSelected bool) {
if item == "/aaa" {
return true, false
}
return false, false
},
Visitor: checkVisitOrder([]TreeVisit{
{"visitNode", "/aaa"},
}),
},
// select dir/
{
Snapshot: Snapshot{
Nodes: map[string]Node{
"dir": Dir{Nodes: map[string]Node{
"otherfile": File{"x"},
"subdir": Dir{Nodes: map[string]Node{
"file": File{"content: file\n"},
}},
}},
"foo": File{"content: foo\n"},
},
},
Select: func(item string, dstpath string, node *restic.Node) (selectForRestore bool, childMayBeSelected bool) {
if strings.HasPrefix(item, "/dir") {
return true, true
}
return false, false
},
Visitor: checkVisitOrder([]TreeVisit{
{"enterDir", "/dir"},
{"visitNode", "/dir/otherfile"},
{"enterDir", "/dir/subdir"},
{"visitNode", "/dir/subdir/file"},
{"leaveDir", "/dir/subdir"},
{"leaveDir", "/dir"},
}),
},
// select only dir/otherfile
{
Snapshot: Snapshot{
Nodes: map[string]Node{
"dir": Dir{Nodes: map[string]Node{
"otherfile": File{"x"},
"subdir": Dir{Nodes: map[string]Node{
"file": File{"content: file\n"},
}},
}},
"foo": File{"content: foo\n"},
},
},
Select: func(item string, dstpath string, node *restic.Node) (selectForRestore bool, childMayBeSelected bool) {
switch item {
case "/dir":
return false, true
case "/dir/otherfile":
return true, false
default:
return false, false
}
},
Visitor: checkVisitOrder([]TreeVisit{
{"visitNode", "/dir/otherfile"},
}),
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
repo, cleanup := repository.TestRepository(t)
defer cleanup()
sn, id := saveSnapshot(t, repo, test.Snapshot)
res, err := NewRestorer(repo, id)
if err != nil {
t.Fatal(err)
}
res.SelectFilter = test.Select
tempdir, cleanup := rtest.TempDir(t)
defer cleanup()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// make sure we're creating a new subdir of the tempdir
target := filepath.Join(tempdir, "target")
err = res.traverseTree(ctx, target, string(filepath.Separator), *sn.Tree, test.Visitor(t))
if err != nil {
t.Fatal(err)
}
})
}
}