/// <reference types="node" />
import { EventEmitter } from 'events';
import { Span } from 'opentracing';
import { Observable } from 'rxjs';
import { Disposable } from './disposable';
import { FileSystemUpdater } from './fs';
import { Logger } from './logging';
import { InMemoryFileSystem } from './memfs';
/**
 * Schema of a package.json file
 */
export interface PackageJson {
    name?: string;
    version?: string;
    typings?: string;
    repository?: string | {
        type: string;
        url: string;
    };
    dependencies?: {
        [packageName: string]: string;
    };
    devDependencies?: {
        [packageName: string]: string;
    };
    peerDependencies?: {
        [packageName: string]: string;
    };
    optionalDependencies?: {
        [packageName: string]: string;
    };
}
export declare const DEPENDENCY_KEYS: ReadonlyArray<'dependencies' | 'devDependencies' | 'peerDependencies' | 'optionalDependencies'>;
/**
 * Returns the name of a package that a file is contained in
 */
export declare function extractNodeModulesPackageName(uri: string): string | undefined;
/**
 * Returns the name of a package that a file in DefinitelyTyped defines.
 * E.g. `file:///foo/types/node/index.d.ts` -> `@types/node`
 */
export declare function extractDefinitelyTypedPackageName(uri: string): string | undefined;
export declare class PackageManager extends EventEmitter implements Disposable {
    private updater;
    private inMemoryFileSystem;
    private logger;
    /**
     * Map of package.json URIs _defined_ in the workspace to optional content.
     * Does not include package.jsons of dependencies.
     * Updated as new package.jsons are discovered.
     */
    private packages;
    /**
     * The URI of the root package.json, if any.
     * Updated as new package.jsons are discovered.
     */
    rootPackageJsonUri: string | undefined;
    /**
     * Subscriptions to unsubscribe from on object disposal
     */
    private subscriptions;
    constructor(updater: FileSystemUpdater, inMemoryFileSystem: InMemoryFileSystem, logger?: Logger);
    dispose(): void;
    /** Emitted when a new package.json was found and parsed */
    on(event: 'parsed', listener: (uri: string, packageJson: PackageJson) => void): this;
    /**
     * Returns an Iterable for all package.jsons in the workspace
     */
    packageJsonUris(): IterableIterator<string>;
    /**
     * Gets the content of the closest package.json known to to the DependencyManager in the ancestors of a URI
     *
     * @return Observable that emits a single PackageJson or never
     */
    getClosestPackageJson(uri: string, span?: Span): Observable<PackageJson>;
    /**
     * Returns the parsed package.json of the passed URI
     *
     * @param uri URI of the package.json
     * @return Observable that emits a single PackageJson or never
     */
    getPackageJson(uri: string, childOf?: Span): Observable<PackageJson>;
    /**
     * Walks the parent directories of a given URI to find the first package.json that is known to the InMemoryFileSystem
     *
     * @param uri URI of a file or directory in the workspace
     * @return The found package.json or undefined if none found
     */
    getClosestPackageJsonUri(uri: string): string | undefined;
}