object-store: provide helpers for loose_objects_cache

diff --git a/sha1-file.c b/sha1-file.c
index 503262edd2a6ad3e03eda39640c09fde33afb4ab..4aae716a37fe3a4c0dc9060158fe37e02b65fddd 100644 (file)
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -2125,6 +2125,32 @@ int for_each_loose_object(each_loose_object_fn cb, void *data,
        return 0;
 }
 
+static int append_loose_object(const struct object_id *oid, const char *path,
+                              void *data)
+{
+       oid_array_append(data, oid);
+       return 0;
+}
+
+void odb_load_loose_cache(struct object_directory *odb, int subdir_nr)
+{
+       struct strbuf buf = STRBUF_INIT;
+
+       if (subdir_nr < 0 ||
+           subdir_nr >= ARRAY_SIZE(odb->loose_objects_subdir_seen))
+               BUG("subdir_nr out of range");
+
+       if (odb->loose_objects_subdir_seen[subdir_nr])
+               return;
+
+       strbuf_addstr(&buf, odb->path);
+       for_each_file_in_obj_subdir(subdir_nr, &buf,
+                                   append_loose_object,
+                                   NULL, NULL,
+                                   &odb->loose_objects_cache);
+       odb->loose_objects_subdir_seen[subdir_nr] = 1;
+}
+
 static int check_stream_sha1(git_zstream *stream,
                             const char *hdr,
                             unsigned long size,