Function index_differs_from

diff-lib.c:674–702

}

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;
	unsigned has_changes;

	repo_init_revisions(r, &rev, NULL);
	memset(&opt, 0, sizeof(opt));
	opt.def = def;
	setup_revisions(0, NULL, &rev, &opt);
	rev.diffopt.flags.quick = 1;
	rev.diffopt.flags.exit_with_status = 1;
	if (flags) {
		diff_flags_or(&rev.diffopt.flags, flags);
		/*
		 * Now that flags are merged, honor override_submodule_config
		 * and ignore_submodules from passed flags.
		 */
		if (flags->override_submodule_config)
			rev.diffopt.flags.ignore_submodules = flags->ignore_submodules;
	}
	rev.diffopt.ita_invisible_in_index = ita_invisible_in_index;
	run_diff_index(&rev, DIFF_INDEX_CACHED);
	has_changes = rev.diffopt.flags.has_changes;
	release_revisions(&rev);
	return (has_changes != 0);
}

static const char *idiff_prefix_cb(struct diff_options *opt UNUSED, void *data)
{