sha1_file: add for_each iterators for loose and packed objects

We typically iterate over the reachable objects in a
repository by starting at the tips and walking the graph.
There's no easy way to iterate over all of the objects,
including unreachable ones. Let's provide a way of doing so.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/cache.h b/cache.h
index bdfbbcf79..51ee856ac 100644
--- a/cache.h
+++ b/cache.h
@@ -1272,6 +1272,17 @@ int for_each_loose_file_in_objdir(const char *path,
 				  each_loose_subdir_fn subdir_cb,
 				  void *data);
 
+/*
+ * Iterate over loose and packed objects in both the local
+ * repository and any alternates repositories.
+ */
+typedef int each_packed_object_fn(const unsigned char *sha1,
+				  struct packed_git *pack,
+				  uint32_t pos,
+				  void *data);
+extern int for_each_loose_object(each_loose_object_fn, void *);
+extern int for_each_packed_object(each_packed_object_fn, void *);
+
 struct object_info {
 	/* Request */
 	enum object_type *typep;