Function fast_forward_to

sequencer.c:646–682

}

static int fast_forward_to(struct repository *r,
			   const struct object_id *to,
			   const struct object_id *from,
			   int unborn,
			   struct replay_opts *opts)
{
	struct ref_transaction *transaction;
	struct strbuf sb = STRBUF_INIT;
	struct strbuf err = STRBUF_INIT;

	repo_read_index(r);
	if (checkout_fast_forward(r, from, to, 1))
		return -1; /* the callee should have complained already */

	strbuf_addf(&sb, "%s: fast-forward", action_name(opts));

	transaction = ref_store_transaction_begin(get_main_ref_store(the_repository),
						  0, &err);
	if (!transaction ||
	    ref_transaction_update(transaction, "HEAD",
				   to, unborn && !is_rebase_i(opts) ?
				   null_oid(the_hash_algo) : from, NULL, NULL,
				   0, sb.buf, &err) ||
	    ref_transaction_commit(transaction, &err)) {
		ref_transaction_free(transaction);
		error("%s", err.buf);
		strbuf_release(&sb);
		strbuf_release(&err);
		return -1;
	}

	strbuf_release(&sb);
	strbuf_release(&err);
	ref_transaction_free(transaction);
	update_abort_safety_file();
	return 0;
}

enum commit_msg_cleanup_mode get_cleanup_mode(const char *cleanup_arg,
	int use_editor)