if (ignore_submodule_arg &&
                            !strcmp(ignore_submodule_arg, "all"))
                                flags.ignore_submodules = 1;
-                       committable = index_differs_from(parent, &flags, 1);
+                       committable = index_differs_from(the_repository,
+                                                        parent, &flags, 1);
                }
        }
        strbuf_release(&committer_ident);
 
         */
        if (read_cache() < 0)
                die_errno("read_cache failed");
-       if (index_differs_from("HEAD", NULL, 0))
+       if (index_differs_from(the_repository, "HEAD", NULL, 0))
                exit(2);
        exit(0);
 }
 
 {
        struct rev_info revs;
 
-       repo_init_revisions(the_repository, &revs, NULL);
+       repo_init_revisions(opt->repo, &revs, NULL);
        copy_pathspec(&revs.prune_data, &opt->pathspec);
        revs.diffopt = *opt;
 
        return 0;
 }
 
-int index_differs_from(const char *def, const struct diff_flags *flags,
+int index_differs_from(struct repository *r,
+                      const char *def, const struct diff_flags *flags,
                       int ita_invisible_in_index)
 {
        struct rev_info rev;
        struct setup_revision_opt opt;
 
-       repo_init_revisions(the_repository, &rev, NULL);
+       repo_init_revisions(r, &rev, NULL);
        memset(&opt, 0, sizeof(opt));
        opt.def = def;
        setup_revisions(0, NULL, &rev, &opt);
 
 
 void diff_no_index(struct repository *, struct rev_info *, int, const char **);
 
-int index_differs_from(const char *def, const struct diff_flags *flags,
+int index_differs_from(struct repository *r, const char *def,
+                      const struct diff_flags *flags,
                       int ita_invisible_in_index);
 
 /*
 
                        unborn = 1;
                } else if (unborn)
                        oidcpy(&head, the_hash_algo->empty_tree);
-               if (index_differs_from(unborn ? empty_tree_oid_hex() : "HEAD",
+               if (index_differs_from(r, unborn ? empty_tree_oid_hex() : "HEAD",
                                       NULL, 0))
                        return error_dirty_index(r->index, opts);
        }
                        if (res)
                                goto release_todo_list;
                }
-               if (index_differs_from("HEAD", NULL, 0)) {
+               if (index_differs_from(r, "HEAD", NULL, 0)) {
                        res = error_dirty_index(r->index, opts);
                        goto release_todo_list;
                }