/**
 * Help text for CLI
 */
export declare const CliHelptext = "Usage:\nset environment variable as below, then execute lib/index.js with node\nrequired:\n  RUNTIME          runtime identifier, currently supports only 'cc'\n  ASSET_ROOT       root directory for assets\n  SCENE_FILE       exporting scene file\n\noptional:\n  DEST             destination directory;        default './scene-graph'\n  ASSET_NAME_SPACE asset directory name;         default 'assets'\n  ASSET_DEST       asset destination directory;  default ${DEST}/${ASSET_NAME_SPACE}\n  PLUGINS          space separated plugin names; default '',\n\ne.g;\nRUNTIME=cc ASSET_ROOT=path/to/asset SCENE_FILE=path/to/scene PLUGINS='plugin1 plugin2' sgmed\n";