static gboolean
asb_plugin_desktop_refine (AsbPlugin *plugin,
			   AsbPackage *pkg,
			   const gchar *filename,
			   AsbApp *app,
			   const gchar *tmpdir,
			   GError **error)
{
	AsIcon *icon;
	AsAppParseFlags parse_flags = AS_APP_PARSE_FLAG_USE_HEURISTICS |
				      AS_APP_PARSE_FLAG_ALLOW_VETO;
	gboolean ret;
	g_autoptr(AsApp) desktop_app = NULL;
	g_autoptr(GdkPixbuf) pixbuf = NULL;

	/* use GenericName fallback */
	if (asb_context_get_flag (plugin->ctx, ASB_CONTEXT_FLAG_USE_FALLBACKS))
		parse_flags |= AS_APP_PARSE_FLAG_USE_FALLBACKS;

	/* create app */
	desktop_app = as_app_new ();
	if (!as_app_parse_file (desktop_app, filename, parse_flags, error))
		return FALSE;

	/* copy all metadata */
	as_app_subsume_full (AS_APP (app), desktop_app, AS_APP_SUBSUME_FLAG_NO_OVERWRITE);

	/* is the icon a stock-icon-name? */
	icon = as_app_get_icon_default (AS_APP (app));
	if (icon != NULL) {
		g_autofree gchar *key = NULL;
		key = g_strdup (as_icon_get_name (icon));
		if (as_icon_get_kind (icon) == AS_ICON_KIND_STOCK) {
			asb_package_log (pkg,
					 ASB_PACKAGE_LOG_LEVEL_DEBUG,
					 "using stock icon %s", key);
		} else {
			g_autoptr(GError) error_local = NULL;
			g_ptr_array_set_size (as_app_get_icons (AS_APP (app)), 0);
			ret = asb_plugin_desktop_add_icons (plugin,
							    app,
							    tmpdir,
							    key,
							    &error_local);
			if (!ret) {
				as_app_add_veto (AS_APP (app), "%s",
						 error_local->message);
			}
		}
	}

	return TRUE;
}
/**
 * asb_plugin_process_filename:
 */
static gboolean
asb_plugin_process_filename (AsbPlugin *plugin,
			     AsbPackage *pkg,
			     const gchar *filename,
			     GList **apps,
			     const gchar *tmpdir,
			     GError **error)
{
	AsIcon *icon;
	AsAppParseFlags parse_flags = AS_APP_PARSE_FLAG_USE_HEURISTICS;
	gboolean ret;
	_cleanup_free_ gchar *app_id = NULL;
	_cleanup_free_ gchar *full_filename = NULL;
	_cleanup_object_unref_ AsbApp *app = NULL;
	_cleanup_object_unref_ GdkPixbuf *pixbuf = NULL;

	/* use GenericName fallback */
	if (asb_context_get_flag (plugin->ctx, ASB_CONTEXT_FLAG_USE_FALLBACKS))
		parse_flags |= AS_APP_PARSE_FLAG_USE_FALLBACKS;

	/* create app */
	app_id = g_path_get_basename (filename);
	app = asb_app_new (pkg, app_id);
	asb_app_set_hidpi_enabled (app, asb_context_get_flag (plugin->ctx, ASB_CONTEXT_FLAG_HIDPI_ICONS));
	full_filename = g_build_filename (tmpdir, filename, NULL);
	if (!as_app_parse_file (AS_APP (app), full_filename, parse_flags, error))
		return FALSE;

	/* NoDisplay apps are never included */
	if (as_app_get_metadata_item (AS_APP (app), "NoDisplay") != NULL)
		asb_app_add_requires_appdata (app, "NoDisplay=true");

	/* Settings or DesktopSettings requires AppData */
	if (!asb_context_get_flag (plugin->ctx, ASB_CONTEXT_FLAG_IGNORE_SETTINGS)) {
		if (as_app_has_category (AS_APP (app), "Settings"))
			asb_app_add_requires_appdata (app, "Category=Settings");
		if (as_app_has_category (AS_APP (app), "DesktopSettings"))
			asb_app_add_requires_appdata (app, "Category=DesktopSettings");
	}

	/* is the icon a stock-icon-name? */
	icon = as_app_get_icon_default (AS_APP (app));
	if (icon != NULL) {
		_cleanup_free_ gchar *key = NULL;
		key = g_strdup (as_icon_get_name (icon));
		if (as_icon_get_kind (icon) == AS_ICON_KIND_STOCK) {
			asb_package_log (pkg,
					 ASB_PACKAGE_LOG_LEVEL_DEBUG,
					 "using stock icon %s", key);
		} else {
			_cleanup_error_free_ GError *error_local = NULL;
			g_ptr_array_set_size (as_app_get_icons (AS_APP (app)), 0);
			ret = asb_plugin_desktop_add_icons (plugin,
							    app,
							    tmpdir,
							    key,
							    &error_local);
			if (!ret) {
				as_app_add_veto (AS_APP (app), "%s",
						 error_local->message);
			}
		}
	}

	/* add */
	asb_plugin_add_app (apps, AS_APP (app));
	return TRUE;
}