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Merge pull request #865 from restic/handle-empty-snapshots

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Refuse to create empty snapshots
This commit is contained in:
Alexander Neumann 2017-03-07 11:21:48 +01:00
commit f5a55a81f7
2 changed files with 35 additions and 5 deletions
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20
src/restic/archiver/archiver.go
View file

@ -734,6 +734,21 @@ func (arch *Archiver) Snapshot(p *restic.Progress, paths, tags []string, hostnam
return nil, restic.ID{}, err
}
// receive the top-level tree
root := (<-resCh).(*restic.Node)
debug.Log("root node received: %v", root.Subtree.Str())
sn.Tree = root.Subtree
// load top-level tree again to see if it is empty
toptree, err := arch.repo.LoadTree(*root.Subtree)
if err != nil {
return nil, restic.ID{}, err
}
if len(toptree.Nodes) == 0 {
return nil, restic.ID{}, errors.Fatal("no files/dirs saved, refusing to create empty snapshot")
}
// save index
err = arch.repo.SaveIndex()
if err != nil {
@ -743,11 +758,6 @@ func (arch *Archiver) Snapshot(p *restic.Progress, paths, tags []string, hostnam
debug.Log("saved indexes")
// receive the top-level tree
root := (<-resCh).(*restic.Node)
debug.Log("root node received: %v", root.Subtree.Str())
sn.Tree = root.Subtree
// save snapshot
id, err := arch.repo.SaveJSONUnpacked(restic.SnapshotFile, sn)
if err != nil {

20
src/restic/archiver/archiver_test.go
View file

@ -294,3 +294,23 @@ func assertNoUnreferencedPacks(t *testing.T, chkr *checker.Checker) {
OK(t, err)
}
}
func TestArchiveEmptySnapshot(t *testing.T) {
repo, cleanup := repository.TestRepository(t)
defer cleanup()
arch := archiver.New(repo)
sn, id, err := arch.Snapshot(nil, []string{"file-does-not-exist-123123213123", "file2-does-not-exist-too-123123123"}, nil, "localhost", nil)
if err == nil {
t.Errorf("expected error for empty snapshot, got nil")
}
if !id.IsNull() {
t.Errorf("expected null ID for empty snapshot, got %v", id.Str())
}
if sn != nil {
t.Errorf("expected null snapshot for empty snapshot, got %v", sn)
}
}