import { ILoggerProps } from './logger';
import { DepBuilder } from './dep-builder';
import { GlobalOptions, TaskContext } from './task-manager';
interface OptionConfig {
    default?: any;
    type?: any[];
}
export declare type OptionDef = [string, string, OptionConfig | undefined];
export declare type TaskFn<O, T = any> = (ctx: TaskContext<O>) => T | Promise<T>;
export interface TaskDep<O = any> {
    name: string;
    /**
     * Dependences are executed serially by default.
     * If order doesn't matter and you want better performance via parallel, you can mark it as asynchronized.
     * Asynchronized will run immediately whether there are synchronized tasks before them or not.
     * You can pass a number as the priority of asynchronized tasks, bigger is formmer.
     */
    async?: boolean | number;
    /**
     * Whether rerun it when it occured in dependences tree more then once.
     */
    force?: boolean;
    /**
     * Parsed options
     */
    options?: O;
    resolveOptions?: (ctx: TaskContext) => Promise<O> | O;
    [k: string]: any;
}
export declare type Dependency = TaskDep | string | DepBuilder;
export interface Task<O = any> extends TaskDep<O> {
    namespaces: string[];
    dependencies?: TaskDep[];
    desc?: string;
    fn?: (ctx: TaskContext<O>) => void | Promise<void>;
    /**
     * Raw arg strings
     */
    rawArgs: string[];
    /**
     * @description Whether task options only allow defined options, default false
     * @default false
     */
    strict?: boolean;
    options: O;
    /**
     * @description whether show loading
     * @default globalOptions.loading
     */
    loading?: boolean;
    /**
     * @description whether log executed command
     * @default globalOptions.logCommand
     */
    logCommand?: boolean;
    logger?: ILoggerProps;
}
/**
 * Set global options for all tasks.
 * @param options
 */
export declare function setGlobalOptions(options: GlobalOptions): void;
export declare const before: (fn: (t: Task) => void | Promise<void>) => void;
export declare const after: (fn: (t: Task) => void | Promise<void>) => void;
export declare const onerror: (fn: (err: Error, t: Task) => void | Promise<void>) => void;
declare namespace TaskOptions {
    let last: {
        desc: string | undefined;
        optionDefs: OptionDef[];
        strict: boolean | undefined;
        loading: boolean | undefined;
    };
    function empty(): {
        desc: string | undefined;
        optionDefs: OptionDef[];
        strict: boolean | undefined;
        loading: boolean | undefined;
    };
}
/**
 * Define task description
 * @param desc
 */
export declare function desc(desc: string): void;
/**
 * Define a task cli option
 * @param rawName
 * @param description
 * @param config
 */
export declare function option(rawName: string, description: string, config?: OptionConfig): void;
/**
 * Define task cli options are strict, which means it will throw an error if you passed undefined options.
 */
export declare function strict(): void;
/**
 * Set options for next task.
 * @param options
 */
export declare function setOption(options: Partial<typeof TaskOptions.last>): void;
export declare function task<O>(name: string, fn: TaskFn<O>): Task<O>;
export declare function task<O>(name: string, dependencies: Dependency[], fn?: TaskFn<O>): Task<O>;
/**
 * Create namespace prefix for inner tasks
 * @param ns namespace
 * @param fn
 * @example
 * namespace('client', ns => {
 *   task('run', async ctx => {
 *     logger.log(ns) // 'client'
 *     await ctx.exec('<run cmd>')
 *   })
 * })
 * namespace('server', ns => {
 *   task('run', async ctx => {
 *     logger.log(ns) // 'server'
 *     await ctx.exec('<run cmd>')
 *   })
 * })
 *
 * ==========
 * $ yarn foy client:run
 * $ yarn foy server:run
 */
export declare function namespace(ns: string, fn: (ns: string) => void): void;
export {};