Function sequencer_rollback

sequencer.c:3513–3560

}

int sequencer_rollback(struct repository *r, struct replay_opts *opts)
{
	FILE *f;
	struct object_id oid;
	struct strbuf buf = STRBUF_INIT;
	const char *p;

	f = fopen(git_path_head_file(), "r");
	if (!f && errno == ENOENT) {
		/*
		 * There is no multiple-cherry-pick in progress.
		 * If CHERRY_PICK_HEAD or REVERT_HEAD indicates
		 * a single-cherry-pick in progress, abort that.
		 */
		return rollback_single_pick(r);
	}
	if (!f)
		return error_errno(_("cannot open '%s'"), git_path_head_file());
	if (strbuf_getline_lf(&buf, f)) {
		error(_("cannot read '%s': %s"), git_path_head_file(),
		      ferror(f) ?  strerror(errno) : _("unexpected end of file"));
		fclose(f);
		goto fail;
	}
	fclose(f);
	if (parse_oid_hex(buf.buf, &oid, &p) || *p != '\0') {
		error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"),
			git_path_head_file());
		goto fail;
	}
	if (is_null_oid(&oid)) {
		error(_("cannot abort from a branch yet to be born"));
		goto fail;
	}

	if (!rollback_is_safe()) {
		/* Do not error, just do not rollback */
		warning(_("You seem to have moved HEAD. "
			  "Not rewinding, check your HEAD!"));
	} else
	if (reset_merge(&oid))
		goto fail;
	strbuf_release(&buf);
	return sequencer_remove_state(opts);
fail:
	strbuf_release(&buf);
	return -1;
}

int sequencer_skip(struct repository *r, struct replay_opts *opts)
{