Function ref_transaction_prepare

refs.c:2667–2716

}

int ref_transaction_prepare(struct ref_transaction *transaction,
			    struct strbuf *err)
{
	struct ref_store *refs = transaction->ref_store;
	int ret;

	switch (transaction->state) {
	case REF_TRANSACTION_OPEN:
		/* Good. */
		break;
	case REF_TRANSACTION_PREPARED:
		BUG("prepare called twice on reference transaction");
		break;
	case REF_TRANSACTION_CLOSED:
		BUG("prepare called on a closed reference transaction");
		break;
	default:
		BUG("unexpected reference transaction state");
		break;
	}

	if (refs->repo->disable_ref_updates) {
		strbuf_addstr(err,
			      _("ref updates forbidden inside quarantine environment"));
		return -1;
	}

	string_list_sort(&transaction->refnames);
	if (ref_update_reject_duplicates(&transaction->refnames, err))
		return REF_TRANSACTION_ERROR_GENERIC;

	/* Preparing checks before locking references */
	ret = run_transaction_hook(transaction, "preparing");
	if (ret) {
		ref_transaction_abort(transaction, err);
		die(_(abort_by_ref_transaction_hook), "preparing");
	}

	ret = refs->be->transaction_prepare(refs, transaction, err);
	if (ret)
		return ret;

	ret = run_transaction_hook(transaction, "prepared");
	if (ret) {
		ref_transaction_abort(transaction, err);
		die(_(abort_by_ref_transaction_hook), "prepared");
	}

	return 0;
}

int ref_transaction_abort(struct ref_transaction *transaction,
			  struct strbuf *err)