import { Source } from './TransformRunner';
export interface Options {
    extensions?: Set<string>;
    cwd?: string;
}
/**
 * Builds an iterator that loops through all the files in the given paths,
 * matching an allowlist of extensions. Ignores files excluded by git.
 */
export declare function iterateSources(roots: Array<string>, { extensions, cwd, }?: {
    extensions?: Set<string>;
    cwd?: string;
}): AsyncGenerator<Source>;