import { Filename, PortablePath, Watcher, WatchCallback } from '@yarnpkg/fslib';
import { EventEmitter } from 'events';
import { ResolvedPath } from './resolveNodeModulesPath';
declare class WatchEventEmitter extends EventEmitter {
    private dirWatchers;
    private watchPath;
    private watcherId;
    constructor(dirWatchers: DirectoryWatcherMap, watchPath: PortablePath, watcherId: number);
    close(): void;
}
type DirectoryWatcherMap = Map<PortablePath, DirectoryWatcher>;
interface DirectoryWatcher {
    eventEmitters: Map<number, Watcher & EventEmitter>;
    dirEntries: Set<Filename>;
}
export declare class WatchManager extends EventEmitter {
    private readonly dirWatchers;
    private lastWatcherId;
    registerWatcher(watchPath: PortablePath, dirList: Set<Filename>, callback: WatchCallback): WatchEventEmitter;
    notifyWatchers(resolvePath: (nodePath: PortablePath) => ResolvedPath): void;
}
export {};