refs: make pack_refs() virtual

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

3 files changed, 15 insertions, 2 deletions

diff --git a/refs.c b/refs.c
index a5c11088f2..cdd78b97ac 100644
--- a/refs.c
+++ b/refs.c
@@ -1421,6 +1421,13 @@ void assert_main_repository(struct ref_store *refs, const char *caller)
 }
 
 /* backend functions */
+int pack_refs(unsigned int flags)
+{
+	struct ref_store *refs = get_ref_store(NULL);
+
+	return refs->be->pack_refs(refs, flags);
+}
+
 int ref_transaction_commit(struct ref_transaction *transaction,
 			   struct strbuf *err)
 {
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 44eef1cec7..5ba2804a86 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2354,10 +2354,10 @@ static void prune_refs(struct ref_to_prune *r)
 	}
 }
 
-int pack_refs(unsigned int flags)
+static int files_pack_refs(struct ref_store *ref_store, unsigned int flags)
 {
 	struct files_ref_store *refs =
-		get_files_ref_store(NULL, "pack_refs");
+		files_downcast(ref_store, 0, "pack_refs");
 	struct pack_refs_cb_data cbdata;
 
 	memset(&cbdata, 0, sizeof(cbdata));
@@ -4022,6 +4022,8 @@ struct ref_storage_be refs_be_files = {
 	files_ref_store_create,
 	files_transaction_commit,
 
+	files_pack_refs,
+
 	files_read_raw_ref,
 	files_verify_refname_available
 };
diff --git a/refs/refs-internal.h b/refs/refs-internal.h
index 6c698f442d..256f7f581f 100644
--- a/refs/refs-internal.h
+++ b/refs/refs-internal.h
@@ -500,6 +500,8 @@ typedef int ref_transaction_commit_fn(struct ref_store *refs,
 				      struct ref_transaction *transaction,
 				      struct strbuf *err);
 
+typedef int pack_refs_fn(struct ref_store *ref_store, unsigned int flags);
+
 /*
  * Read a reference from the specified reference store, non-recursively.
  * Set type to describe the reference, and:
@@ -554,6 +556,8 @@ struct ref_storage_be {
 	ref_store_init_fn *init;
 	ref_transaction_commit_fn *transaction_commit;
 
+	pack_refs_fn *pack_refs;
+
 	read_raw_ref_fn *read_raw_ref;
 	verify_refname_available_fn *verify_refname_available;
 };