/** @ignore */
export declare function gitHubLink(val: string): string;
/**
 * Concat function options.
 */
export interface ConcatOptions {
    /**
     * Whether to add a table of contents.
     */
    toc?: boolean;
    /**
     * Limit TOC entries to headings only up to the specified level.
     */
    tocLevel?: number;
    /**
     * Glob patterns to exclude in `dir`.
     */
    ignore?: string | string[];
    /**
     * Whether to decrease levels of all titles in markdown file to set them below file and directory title levels.
     */
    decreaseTitleLevels?: boolean;
    /**
     * Level to start file and directory levels.
     */
    startTitleLevelAt?: number;
    /**
     * String to be used to join concatenated files.
     */
    joinString?: string;
    /**
     * Key name to get title in `FrontMatter` meta data in markdown headers.
     */
    titleKey?: string;
    /**
     * Whether to use file names as titles.
     */
    fileNameAsTitle?: boolean;
    /**
     * Whether to use directory names as titles.
     */
    dirNameAsTitle?: boolean;
    /**
     * Do not add anchor links
     */
    hideAnchorLinks?: boolean;
    /**
     * Custom sort function. If not set, files are sorted alphabetically.
     */
    sorter?: (a: string, b: string) => number;
}
/**
 * Scans and concatenates all markdown files in given directory.
 *
 * @param dir is the directory to scan markdown files in.
 * @param options are several parameters to modify concatenation behaviour.
 * @returns concatenated contents of markdown files.
 * @example
 * import concatMd, { concatMdSync } from "concat-md"
 */
export declare function concatMdSync(dir: string, options?: ConcatOptions): string;
/**
 * Scans and concatenates all markdown files in given directory.
 *
 * @param dir is the directory to scan markdown files in.
 * @param options are several parameters to modify concatenation behaviour.
 * @returns concatenated contents of markdown files.
 * @example
 * import concatMd, { concatMdSync } from "concat-md"
 */
export default function concatMd(dir: string, options?: ConcatOptions): Promise<string>;