rev-list --objects: fix object list without commit.

Earlier, "rev-list --objects <sha1>" for an object chain that
does not have any commit failed with a usage message.  This
fixes "send-pack remote $tag" where tag points at a non-commit
(e.g. a blob).

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/rev-list.c b/rev-list.c
index 8020d97..d060966 100644 (file)
--- a/rev-list.c
+++ b/rev-list.c
@@ -850,7 +850,8 @@ int main(int argc, const char **argv)
                handle_one_commit(commit, &list);
        }
 
-       if (!list)
+       if (!list &&
+           (!(tag_objects||tree_objects||blob_objects) && !pending_objects))
                usage(rev_list_usage);
 
        paths = get_pathspec(prefix, argv + i);