flatpak_dir_read_latest (FlatpakDir   *self,
                         const char   *remote,
                         const char   *ref,
                         char        **out_alt_id,
                         GCancellable *cancellable,
                         GError      **error)
{
  g_autofree char *alt_id = NULL;
  g_autofree char *res = NULL;

  if (!flatpak_repo_resolve_rev (self->repo, NULL, remote, ref, FALSE,
                                 &res, cancellable, error))
    return NULL;

  if (out_alt_id)
    {
      g_autoptr(GVariant) commit_data = NULL;
      g_autoptr(GVariant) commit_metadata = NULL;

      if (!ostree_repo_load_commit (self->repo, res, &commit_data, NULL, error))
        return NULL;

      commit_metadata = g_variant_get_child_value (commit_data, 0);
      g_variant_lookup (commit_metadata, "xa.alt-id", "s", &alt_id);

      *out_alt_id = g_steal_pointer (&alt_id);
    }

  return g_steal_pointer (&res);
}
flatpak_dir_read_latest (FlatpakDir   *self,
                         const char   *remote,
                         const char   *ref,
                         char        **out_alt_id,
                         GCancellable *cancellable,
                         GError      **error)
{
  g_autofree char *alt_id = NULL;
  g_autofree char *res = NULL;

  if (!flatpak_repo_resolve_rev (self->repo, NULL, remote, ref, FALSE,
                                 &res, cancellable, error))
    return NULL;

  if (out_alt_id)
    {
      g_autoptr(GVariant) commit_data = NULL;
      g_autoptr(GVariant) commit_metadata = NULL;

      if (!ostree_repo_load_commit (self->repo, res, &commit_data, NULL, error))
        return NULL;

      commit_metadata = g_variant_get_child_value (commit_data, 0);
      g_variant_lookup (commit_metadata, "xa.alt-id", "s", &alt_id);

      *out_alt_id = g_steal_pointer (&alt_id);
    }

  return g_steal_pointer (&res);
}