storage: filesystem, Populate index before use. Fixes #148

Signed-off-by: Arieh Schneier <15041913+AriehSchneier@users.noreply.github.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/storage/filesystem/object.go b/storage/filesystem/object.go
index 21667fa..846a7b8 100644
--- a/storage/filesystem/object.go
+++ b/storage/filesystem/object.go
@@ -537,14 +537,21 @@ func (s *ObjectStorage) findObjectInPackfile(h plumbing.Hash) (plumbing.Hash, pl
 	return plumbing.ZeroHash, plumbing.ZeroHash, -1
 }
 
+// HashesWithPrefix returns all objects with a hash that starts with a prefix by searching for
+// them in the packfile and the git object directories.
 func (s *ObjectStorage) HashesWithPrefix(prefix []byte) ([]plumbing.Hash, error) {
 	hashes, err := s.dir.ObjectsWithPrefix(prefix)
 	if err != nil {
 		return nil, err
 	}
 
+	seen := hashListAsMap(hashes)
+
 	// TODO: This could be faster with some idxfile changes,
 	// or diving into the packfile.
+	if err := s.requireIndex(); err != nil {
+		return nil, err
+	}
 	for _, index := range s.index {
 		ei, err := index.Entries()
 		if err != nil {
@@ -558,6 +565,9 @@ func (s *ObjectStorage) HashesWithPrefix(prefix []byte) ([]plumbing.Hash, error)
 				return nil, err
 			}
 			if bytes.HasPrefix(e.Hash[:], prefix) {
+				if _, ok := seen[e.Hash]; ok {
+					continue
+				}
 				hashes = append(hashes, e.Hash)
 			}
 		}