Function write_transaction_table

refs/reftable-backend.c:1422–1621

}

static int write_transaction_table(struct reftable_writer *writer, void *cb_data)
{
	struct write_transaction_table_arg *arg = cb_data;
	uint64_t ts = reftable_stack_next_update_index(arg->be->stack);
	struct reftable_log_record *logs = NULL;
	struct ident_split committer_ident = {0};
	size_t logs_nr = 0, logs_alloc = 0, i;
	const char *committer_info;
	int ret = 0;

	committer_info = git_committer_info(0);
	if (split_ident_line(&committer_ident, committer_info, strlen(committer_info)))
		BUG("failed splitting committer info");

	QSORT(arg->updates, arg->updates_nr, transaction_update_cmp);

	/*
	 * During reflog migration, we add indexes for a single reflog with
	 * multiple entries. Each entry will contain a different update_index,
	 * so set the limits accordingly.
	 */
	ret = reftable_writer_set_limits(writer, ts, ts + arg->max_index);
	if (ret < 0)
		goto done;

	for (i = 0; i < arg->updates_nr; i++) {
		struct reftable_transaction_update *tx_update = &arg->updates[i];
		struct ref_update *u = tx_update->update;

		if (u->rejection_err)
			continue;

		/*
		 * Write a reflog entry when updating a ref to point to
		 * something new in either of the following cases:
		 *
		 * - The reference is about to be deleted. We always want to
		 *   delete the reflog in that case.
		 * - REF_FORCE_CREATE_REFLOG is set, asking us to always create
		 *   the reflog entry.
		 * - `core.logAllRefUpdates` tells us to create the reflog for
		 *   the given ref.
		 */
		if ((u->flags & REF_HAVE_NEW) &&
		    !(u->type & REF_ISSYMREF) &&
		    ref_update_has_null_new_value(u)) {
			struct reftable_log_record log = {0};
			struct reftable_iterator it = {0};

			ret = reftable_stack_init_log_iterator(arg->be->stack, &it);
			if (ret < 0)
				goto done;

			/*
			 * When deleting refs we also delete all reflog entries
			 * with them. While it is not strictly required to
			 * delete reflogs together with their refs, this
			 * matches the behaviour of the files backend.