Merge branch 'jk/index-pack-maint'

"index-pack --strict" has been taught to make sure that it runs the
final object integrity checks after making the freshly indexed
packfile available to itself.

* jk/index-pack-maint:
  index-pack: correct install_packed_git() args
  index-pack: handle --strict checks of non-repo packs
  prepare_commit_graft: treat non-repository as a noop

commit.c

@@ -207,6 +207,9 @@ static void prepare_commit_graft(void)
 
 	if (commit_graft_prepared)
 		return;
+	if (!startup_info->have_repository)
+		return;
+
 	graft_file = get_graft_file();
 	read_graft_file(graft_file);
 	/* make sure shallows are read */