export interface SourceFile {
    cwd: string;
    filename: string;
}
export interface SourceString {
    data: string;
}
export type Source = SourceFile | SourceString;
export interface SourceData {
    data: string;
    filename?: string;
}
export declare function getSource(source: Source): Promise<SourceData>;
export declare function writeFile(filename: string, data: string): Promise<void>;
export declare function relFile(from: string | undefined, to: string): string;
export declare function glob(globs: Array<string>, cwd: string, hidden?: boolean): Promise<string[]>;
export declare function ensureAbsolute(filename: string, cwd: string): string;
/**
 * Find the deepest common directory of a set of files.
 */
export declare function getRootFolderOfFiles(files: Array<string>, cwd: string): string;
/**
 * Get the common "root" directory of files, their relative path to this
 * directory, and their relative path to new root directory.
 */
export declare function reRootFiles(files: Array<string>, cwd: string, newRoot?: string): {
    root: string;
    newRoot: string;
    files: Array<{
        in: string;
        out: string;
        rel: string;
    }>;
};
export declare function prettyFile(filename: string, cwd: string): string;