Function update_local_ref

builtin/fetch.c:940–1109

}

static int update_local_ref(struct ref *ref,
			    struct ref_transaction *transaction,
			    const struct ref *remote_ref,
			    const struct fetch_config *config,
			    struct ref_update_display_info_array *display_array)
{
	struct commit *current = NULL, *updated;
	int fast_forward = 0;

	if (!odb_has_object(the_repository->objects, &ref->new_oid,
			    ODB_HAS_OBJECT_RECHECK_PACKED | ODB_HAS_OBJECT_FETCH_PROMISOR))
		die(_("object %s not found"), oid_to_hex(&ref->new_oid));

	if (oideq(&ref->old_oid, &ref->new_oid)) {
		if (verbosity > 0)
			ref_update_display_info_append(display_array, '=', '=',
						       _("[up to date]"), NULL,
						       NULL, ref->name,
						       remote_ref->name, &ref->old_oid,
						       &ref->new_oid);
		return 0;
	}

	if (!update_head_ok &&
	    !is_null_oid(&ref->old_oid) &&
	    branch_checked_out(ref->name)) {
		struct ref_update_display_info *info;
		/*
		 * If this is the head, and it's not okay to update
		 * the head, and the old value of the head isn't empty...
		 */
		info = ref_update_display_info_append(display_array, '!', '!',
						      _("[rejected]"), NULL,
						      _("can't fetch into checked-out branch"),
						      ref->name, remote_ref->name,
						      &ref->old_oid, &ref->new_oid);
		ref_update_display_info_set_failed(info);
		return 1;
	}

	if (!is_null_oid(&ref->old_oid) &&
	    starts_with(ref->name, "refs/tags/")) {
		struct ref_update_display_info *info;

		if (force || ref->force) {
			int r;

			r = s_update_ref("updating tag", ref, transaction, 0);

			info = ref_update_display_info_append(display_array, 't', '!',
							      _("[tag update]"), NULL,
							      _("unable to update local ref"),
							      ref->name, remote_ref->name,
							      &ref->old_oid, &ref->new_oid);
			if (r)
				ref_update_display_info_set_failed(info);

			return r;