Skip creating snaphots if there was no change. WARNING: ONLY FOR TEST…

…ING, POSSIBLE LOSS OF DATA, YOU HAVE BEEN WARNED!
ignus2 · Oct 12, 2017 · 7ebee9d · 7ebee9d
1 parent 9ce2a73
commit 7ebee9d
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/internal/archiver/archiver.go b/internal/archiver/archiver.go
@@ -766,6 +766,14 @@ func (arch *Archiver) Snapshot(ctx context.Context, p *restic.Progress, paths, t
 		return nil, restic.ID{}, errors.Fatal("no files/dirs saved, refusing to create empty snapshot")
 	}
 
+	psn, err := restic.LoadSnapshot(ctx, arch.repo, *sn.Parent)
+	if err != nil {
+		return nil, restic.ID{}, err
+	}
+	if root.Subtree.Equal(*psn.Tree) {
+		return nil, restic.ID{}, errors.Fatal("tree matches parent, not creating snapshot")
+	}
+
 	// save index
 	err = arch.repo.SaveIndex(ctx)
 	if err != nil {