make url-related functions reusable

diff --git a/diff-lib.c b/diff-lib.c
index c50f7e39847a5363c8d8859e381259ffd6e57f0b..c9f6e05badf7b752188dcb5fa28a9bef53521dee 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -519,9 +519,12 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
 int index_differs_from(const char *def, int diff_flags)
 {
        struct rev_info rev;
+       struct setup_revision_opt opt;
 
        init_revisions(&rev, NULL);
-       setup_revisions(0, NULL, &rev, def);
+       memset(&opt, 0, sizeof(opt));
+       opt.def = def;
+       setup_revisions(0, NULL, &rev, &opt);
        DIFF_OPT_SET(&rev.diffopt, QUICK);
        DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS);
        rev.diffopt.flags |= diff_flags;