static gboolean
pkg_change_transaction_execute (RpmostreedTransaction *transaction,
			     GCancellable *cancellable,
			     GError **error)
{
  gboolean ret = FALSE;
  PkgChangeTransaction *self = NULL;
  OstreeSysroot *sysroot = NULL;
  glnx_unref_object RpmOstreeSysrootUpgrader *upgrader = NULL;
  int flags = RPMOSTREE_SYSROOT_UPGRADER_FLAGS_REDEPLOY;

  self = (PkgChangeTransaction *) transaction;
  sysroot = rpmostreed_transaction_get_sysroot (transaction);

  if (self->flags & RPMOSTREE_TRANSACTION_PKG_FLAG_DRY_RUN)
    flags |= RPMOSTREE_SYSROOT_UPGRADER_FLAGS_PKGOVERLAY_DRY_RUN;
  if (self->flags & RPMOSTREE_TRANSACTION_PKG_FLAG_NOSCRIPTS)
    flags |= RPMOSTREE_SYSROOT_UPGRADER_FLAGS_PKGOVERLAY_NOSCRIPTS;

  upgrader = rpmostree_sysroot_upgrader_new (sysroot, self->osname, flags,
                                             cancellable, error);
  if (upgrader == NULL)
    {
      if (error && *error == NULL)
        g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
                     "Could not create sysroot upgrader");
      goto out;
    }

  if (self->ignore_scripts)
    rpmostree_sysroot_upgrader_set_ignore_scripts (upgrader, self->ignore_scripts);

  if (self->packages_removed)
    {
      if (!rpmostree_sysroot_upgrader_delete_packages (upgrader, self->packages_removed,
						       cancellable, error))
	goto out;
    }

  if (self->packages_added)
    {
      if (!rpmostree_sysroot_upgrader_add_packages (upgrader, self->packages_added,
						    cancellable, error))
	goto out;
    }

  if (!rpmostree_sysroot_upgrader_deploy (upgrader, cancellable, error))
    goto out;

  if (self->flags & RPMOSTREE_TRANSACTION_PKG_FLAG_REBOOT)
    rpmostreed_reboot (cancellable, error);

  ret = TRUE;
out:
  return ret;
}
static gboolean
package_diff_transaction_execute (RpmostreedTransaction *transaction,
                                  GCancellable *cancellable,
                                  GError **error)
{
  PackageDiffTransaction *self;
  OstreeSysroot *sysroot;

  glnx_unref_object OstreeSysrootUpgrader *upgrader = NULL;
  glnx_unref_object OstreeAsyncProgress *progress = NULL;
  glnx_unref_object OstreeRepo *repo = NULL;
  g_autoptr(GKeyFile) origin = NULL;
  g_autofree gchar *origin_description = NULL;

  OstreeSysrootUpgraderPullFlags upgrader_flags = 0;
  gboolean upgrading = FALSE;
  gboolean changed = FALSE;
  gboolean ret = FALSE;

  self = (PackageDiffTransaction *) transaction;
  sysroot = rpmostreed_transaction_get_sysroot (transaction);
  upgrader = ostree_sysroot_upgrader_new_for_os (sysroot,
                                                 self->osname,
                                                 cancellable,
                                                 error);
  if (upgrader == NULL)
    goto out;

  if (!ostree_sysroot_get_repo (sysroot, &repo, cancellable, error))
    goto out;

  origin = ostree_sysroot_upgrader_dup_origin (upgrader);

  /* Determine if we're upgrading before we set the refspec. */
  upgrading = (self->refspec == NULL && self->revision == NULL);

  if (self->refspec != NULL)
    {
      if (!change_upgrader_refspec (sysroot, upgrader,
                                    self->refspec, cancellable,
                                    NULL, NULL, error))
        goto out;
    }
  else if (origin != NULL)
    {
      self->refspec = g_key_file_get_string (origin, "origin", "refspec", NULL);
      if (self->refspec == NULL)
        {
          g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
                               "Could not find refspec for booted deployment");
        }
    }
  else
    {
      g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
                           "Booted deployment has no origin");
      goto out;
    }

  progress = ostree_async_progress_new ();
  rpmostreed_transaction_connect_download_progress (transaction, progress);
  rpmostreed_transaction_connect_signature_progress (transaction, repo);

  if (self->revision != NULL)
    {
      g_autofree char *checksum = NULL;
      g_autofree char *version = NULL;

      upgrader_flags |= OSTREE_SYSROOT_UPGRADER_PULL_FLAGS_ALLOW_OLDER;

      if (!rpmostreed_parse_revision (self->revision,
                                      &checksum,
                                      &version,
                                      error))
        goto out;

      if (version != NULL)
        {
          rpmostreed_transaction_emit_message_printf (transaction,
                                                      "Resolving version '%s'",
                                                      version);

          if (!rpmostreed_repo_lookup_version (repo,
                                               self->refspec,
                                               version,
                                               progress,
                                               cancellable,
                                               &checksum,
                                               error))
            goto out;
        }

      g_key_file_set_string (origin, "origin", "override-commit", checksum);

      if (!ostree_sysroot_upgrader_set_origin (upgrader, origin,
                                               cancellable, error))
        goto out;
    }
  else if (upgrading)
    {
      if (g_key_file_remove_key (origin, "origin", "override-commit", NULL))
        {
          if (!ostree_sysroot_upgrader_set_origin (upgrader, origin,
                                                   cancellable, error))
            goto out;
        }
    }

  origin_description = ostree_sysroot_upgrader_get_origin_description (upgrader);
  if (origin_description != NULL)
    rpmostreed_transaction_emit_message_printf (transaction,
                                                "Updating from: %s",
                                                origin_description);

  if (!ostree_sysroot_upgrader_pull_one_dir (upgrader,
					     "/usr/share/rpm",
					     0, upgrader_flags,
					     progress,
					     &changed,
					     cancellable,
					     error))
    goto out;

  rpmostree_transaction_emit_progress_end (RPMOSTREE_TRANSACTION (transaction));

  if (!changed)
    {
      if (upgrading)
        rpmostreed_transaction_emit_message_printf (transaction,
                                                    "No upgrade available.");
      else
        rpmostreed_transaction_emit_message_printf (transaction,
                                                    "No change.");
    }

  ret = TRUE;
out:
  return ret;
}