/// <reference types="node" />
import { Platform } from 'puppeteer-core';
import { Readable } from 'stream';
export declare enum SUPPORT_FORMAT {
    XMIND = "xmind",
    SVG = "svg"
}
export declare enum META_KEY {
    CHROMIUM_EXECUTABLE_PATH = "CHROMIUM_EXECUTABLE_PATH",
    CHROMIUM_REVISION = "CHROMIUM_REVISION"
}
export declare type Meta = {
    [META_KEY.CHROMIUM_EXECUTABLE_PATH]?: string;
    [META_KEY.CHROMIUM_REVISION]?: string;
};
export declare function getPuppeteerPlatform(): Platform;
export declare function initMeta(): void;
export declare function updateMetaFile(newMeta: Partial<Meta>): void;
export declare function getMetaInfo(key: META_KEY): string | undefined;
export declare function hasContentPipedIn(): Promise<boolean>;
export declare function getFileNameFromContent(content: string): string;
export declare function readStringFromStream(stream: Readable): Promise<string>;
export declare function unexpedtedError(msg?: string): void;