static gboolean
copy_modules (const char    *release,
              GCancellable  *cancellable,
              GError       **error)
{
  gboolean ret = FALSE;
  ot_lobj GFile *src_modules_file = NULL;
  ot_lobj GFile *dest_modules_parent = NULL;
  ot_lobj GFile *dest_modules_file = NULL;
  
  src_modules_file = ot_gfile_from_build_path ("/lib/modules", release, NULL);
  dest_modules_file = ot_gfile_from_build_path (opt_ostree_dir, "modules", release, NULL);
  dest_modules_parent = g_file_get_parent (dest_modules_file);
  if (!ot_gfile_ensure_directory (dest_modules_parent, FALSE, error))
    goto out;

  if (!g_file_query_exists (dest_modules_file, cancellable))
    {
      if (!ot_gio_shutil_cp_al_or_fallback (src_modules_file, dest_modules_file, cancellable, error))
        goto out;
    }
      
  ret = TRUE;
 out:
  if (error)
    g_prefix_error (error, "Error copying kernel modules: ");
  return ret;
}
static gboolean
do_checkout (OtAdminDeploy     *self,
             const char        *deploy_target,
             const char        *revision,
             GCancellable      *cancellable,
             GError           **error)
{
  gboolean ret = FALSE;
  ot_lobj GFile *deploy_path = NULL;
  ot_lobj GFile *deploy_parent = NULL;
  ot_lfree char *tree_ref = NULL;
  ot_lptrarray GPtrArray *checkout_args = NULL;

  deploy_path = ot_gfile_from_build_path ("/ostree", deploy_target, NULL);
  deploy_parent = g_file_get_parent (deploy_path);
  if (!ot_gfile_ensure_directory (deploy_parent, TRUE, error))
    goto out;

  checkout_args = g_ptr_array_new ();
  ot_ptrarray_add_many (checkout_args, "ostree", "--repo=/ostree/repo",
                        "checkout", "--atomic-retarget", revision ? revision : deploy_target,
                        ot_gfile_get_path_cached (deploy_path), NULL);
  g_ptr_array_add (checkout_args, NULL);

  if (!ot_spawn_sync_checked ("/ostree", (char**)checkout_args->pdata, NULL, G_SPAWN_SEARCH_PATH,
                              NULL, NULL, NULL, NULL, error))
    goto out;

  ret = TRUE;
 out:
  return ret;
}
static gboolean
get_kernel_path_from_release (const char         *release,
                              GFile             **out_path,
                              GCancellable       *cancellable,
                              GError            **error)
{
  gboolean ret = FALSE;
  ot_lfree char *name = NULL;
  ot_lobj GFile *possible_path = NULL;

  /* TODO - replace this with grubby code */

  name = g_strconcat ("vmlinuz-", release, NULL);
  possible_path = ot_gfile_from_build_path ("/boot", name, NULL);
  if (!g_file_query_exists (possible_path, cancellable))
    g_clear_object (&possible_path);

  ret = TRUE;
  ot_transfer_out_value (out_path, &possible_path);
  /*  out: */
  return ret;
}
static gboolean
update_initramfs (const char       *release,
                  const char       *deploy_target,
                  GCancellable     *cancellable,
                  GError          **error)
{
  gboolean ret = FALSE;
  ot_lfree char *initramfs_name = NULL;
  ot_lobj GFile *initramfs_file = NULL;
  ot_lfree char *last_deploy_path = NULL;

  initramfs_name = g_strconcat ("initramfs-ostree-", release, ".img", NULL);
  initramfs_file = ot_gfile_from_build_path ("/boot", initramfs_name, NULL);
  if (!g_file_query_exists (initramfs_file, NULL))
    {
      ot_lptrarray GPtrArray *mkinitramfs_args = NULL;
      ot_lobj GFile *tmpdir = NULL;
      ot_lfree char *initramfs_tmp_path = NULL;
      ot_lfree char *ostree_vardir = NULL;
      ot_lfree char *ostree_moduledir = NULL;
      ot_lobj GFile *initramfs_tmp_file = NULL;
      ot_lobj GFileInfo *initramfs_tmp_info = NULL;
          
      if (!ostree_create_temp_dir (NULL, "ostree-initramfs", NULL, &tmpdir,
                                   cancellable, error))
        goto out;

      ostree_vardir = g_build_filename (opt_ostree_dir, "var", NULL);
      ostree_moduledir = g_build_filename (opt_ostree_dir, "modules", NULL);

      last_deploy_path = g_build_filename (opt_ostree_dir, deploy_target, NULL);

      mkinitramfs_args = g_ptr_array_new ();
      /* Note: the hardcoded /tmp path below is not actually a
       * security flaw, because we've bind-mounted dracut's view
       * of /tmp to the securely-created tmpdir above.
       */
      ot_ptrarray_add_many (mkinitramfs_args,
                            "linux-user-chroot",
                            "--mount-readonly", "/",
                            "--mount-proc", "/proc",
                            "--mount-bind", "/dev", "/dev",
                            "--mount-bind", ostree_vardir, "/var",
                            "--mount-bind", ot_gfile_get_path_cached (tmpdir), "/tmp",
                            "--mount-bind", ostree_moduledir, "/lib/modules",
                            last_deploy_path,
                            "dracut", "-f", "/tmp/initramfs-ostree.img", release,
                            NULL);
      g_ptr_array_add (mkinitramfs_args, NULL);
          
      g_print ("Generating initramfs using %s...\n", last_deploy_path);
      if (!ot_spawn_sync_checked (NULL, (char**)mkinitramfs_args->pdata, NULL,
                                  G_SPAWN_SEARCH_PATH,
                                  NULL, NULL, NULL, NULL, error))
        goto out;
          
      initramfs_tmp_file = g_file_get_child (tmpdir, "initramfs-ostree.img");
      initramfs_tmp_info = g_file_query_info (initramfs_tmp_file, OSTREE_GIO_FAST_QUERYINFO,
                                              G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
                                              cancellable, error);
      if (!initramfs_tmp_info)
        goto out;

      if (g_file_info_get_size (initramfs_tmp_info) == 0)
        {
          g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
                       "Initramfs generation failed, check dracut.log");
          goto out;
        }

      if (!g_file_copy (initramfs_tmp_file, initramfs_file, 0, cancellable, NULL, NULL, error))
        goto out;
          
      g_print ("Created: %s\n", ot_gfile_get_path_cached (initramfs_file));

      (void) ot_gfile_unlink (initramfs_tmp_file, NULL, NULL);
      (void) rmdir (ot_gfile_get_path_cached (tmpdir));
    }

  ret = TRUE;
 out:
  return ret;
}