filesystem: implement PackRefs()

Currently this implementation is only valid for kbfsgit, since it
assumes some things about the filesystem not being updated during the
packing, and about conflict resolution rules.  In the future, it would
be nice to replace this with a more general one, and move this
kbfsgit-optimized implementation into kbfsgit.

Issue: KBFS-2517

1 files changed, 8 insertions, 0 deletions

diff --git a/storage/memory/storage.go b/storage/memory/storage.go
index 927ec41..3d4e84a 100644
--- a/storage/memory/storage.go
+++ b/storage/memory/storage.go
@@ -236,6 +236,14 @@ func (r ReferenceStorage) IterReferences() (storer.ReferenceIter, error) {
 	return storer.NewReferenceSliceIter(refs), nil
 }
 
+func (r ReferenceStorage) CountLooseRefs() (int, error) {
+	return len(r), nil
+}
+
+func (r ReferenceStorage) PackRefs() error {
+	return nil
+}
+
 func (r ReferenceStorage) RemoveReference(n plumbing.ReferenceName) error {
 	delete(r, n)
 	return nil