Function rename_one_ref

builtin/remote.c:713–760

}

static int rename_one_ref(const struct reference *ref, void *cb_data)
{
	struct strbuf new_referent = STRBUF_INIT;
	struct strbuf new_refname = STRBUF_INIT;
	struct rename_info *rename = cb_data;
	const struct object_id *oid = ref->oid;
	const char *referent = ref->target;
	int error;

	compute_renamed_ref(rename, ref->name, &new_refname);

	if (ref->flags & REF_ISSYMREF) {
		/*
		 * Stupidly enough `referent` is not pointing to the immediate
		 * target of a symref, but it's the recursively resolved value.
		 * So symrefs pointing to symrefs would be misresolved, and
		 * unborn symrefs don't have any value for the `referent` at all.
		 */
		referent = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
						   ref->name, RESOLVE_REF_NO_RECURSE,
						   NULL, NULL);
		compute_renamed_ref(rename, referent, &new_referent);
		oid = NULL;
	}

	error = ref_transaction_delete(rename->transaction, ref->name,
				       oid, referent, REF_NO_DEREF, NULL, rename->err);
	if (error < 0)
		goto out;

	error = ref_transaction_update(rename->transaction, new_refname.buf, oid, null_oid(the_hash_algo),
				       (ref->flags & REF_ISSYMREF) ? new_referent.buf : NULL, NULL,
				       REF_SKIP_CREATE_REFLOG | REF_NO_DEREF | REF_SKIP_OID_VERIFICATION,
				       NULL, rename->err);
	if (error < 0)
		goto out;

	error = rename_one_reflog(ref->name, oid, rename);
	if (error < 0)
		goto out;

	display_progress(rename->progress, ++rename->progress_nr);

out:
	strbuf_release(&new_referent);
	strbuf_release(&new_refname);
	return error;
}

static int migrate_file(struct remote *remote)
{