import { SyslConfiguration } from "../config";
import { Sysl } from "../tools/sysl";
import { Events, PluginClient, PluginClientOptions, PluginConfig } from "./types";
/** Configures the plugin engine. */
export type PluginEngineConfig = {
    sysl: Sysl;
    extensionPath?: string;
    workspaceDirs?: string[];
    globalStoragePath?: string;
    options?: PluginClientOptions;
    events: Events;
};
/**
 * Manages the full lifecycle of extension plugins.
 */
export declare class PluginEngine {
    private readonly config;
    private readonly syslConfig;
    private _plugins;
    private readonly disposables;
    private nextInspectPort;
    constructor(config: PluginEngineConfig, syslConfig: SyslConfiguration);
    get plugins(): PluginClient[];
    /** Discovers, registers and enables plugins. */
    activate(): Promise<void>;
    deactivate(): Promise<void>;
    /** Locates available plugins and returns a config for each. */
    locate(): Promise<PluginConfig[]>;
    /** Constructs plugin clients for each config. */
    build(configs: PluginConfig[]): PluginClient[];
    get pluginIds(): string[];
}