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Merge pull request #1209 from restic/handle-colliding-names

Resolve name collisions
This commit is contained in:
Alexander Neumann 2017-09-05 22:33:32 +02:00
commit 5dfb4d1195
3 changed files with 74 additions and 1 deletions

View file

@ -30,6 +30,10 @@ Important Changes in 0.X.Y
included) in a restore, they are not loaded from the repo any more.
https://github.com/restic/restic/pull/1044
* Name collisions are now resolved by appending a counter.
https://github.com/restic/restic/issues/1179
https://github.com/restic/restic/pull/1209
Small changes
-------------

View file

@ -383,7 +383,22 @@ func (arch *Archiver) dirWorker(ctx context.Context, wg *sync.WaitGroup, p *rest
panic("invalid null subtree restic.ID")
}
}
tree.Insert(node)
// insert node into tree, resolve name collisions
name := node.Name
i := 0
for {
i++
err := tree.Insert(node)
if err == nil {
break
}
newName := fmt.Sprintf("%v-%d", name, i)
fmt.Fprintf(os.Stderr, "%v: name collision for %q, renaming to %q\n", filepath.Dir(node.Path), node.Name, newName)
node.Name = newName
}
}
node := &restic.Node{}

View file

@ -4,6 +4,9 @@ import (
"bytes"
"context"
"io"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
@ -312,3 +315,54 @@ func TestArchiveEmptySnapshot(t *testing.T) {
t.Errorf("expected null snapshot for empty snapshot, got %v", sn)
}
}
func chdir(t testing.TB, target string) (cleanup func()) {
curdir, err := os.Getwd()
if err != nil {
t.Fatal(err)
}
t.Logf("chdir to %v", target)
err = os.Chdir(target)
if err != nil {
t.Fatal(err)
}
return func() {
t.Logf("chdir back to %v", curdir)
err := os.Chdir(curdir)
if err != nil {
t.Fatal(err)
}
}
}
func TestArchiveNameCollision(t *testing.T) {
repo, cleanup := repository.TestRepository(t)
defer cleanup()
dir, cleanup := TempDir(t)
defer cleanup()
root := filepath.Join(dir, "root")
OK(t, os.MkdirAll(root, 0755))
OK(t, ioutil.WriteFile(filepath.Join(dir, "testfile"), []byte("testfile1"), 0644))
OK(t, ioutil.WriteFile(filepath.Join(dir, "root", "testfile"), []byte("testfile2"), 0644))
defer chdir(t, root)()
arch := archiver.New(repo)
sn, id, err := arch.Snapshot(context.TODO(), nil, []string{"testfile", filepath.Join("..", "testfile")}, nil, "localhost", nil)
OK(t, err)
t.Logf("snapshot archived as %v", id)
tree, err := repo.LoadTree(context.TODO(), *sn.Tree)
OK(t, err)
if len(tree.Nodes) != 2 {
t.Fatalf("tree has %d nodes, wanted 2: %v", len(tree.Nodes), tree.Nodes)
}
}