/// <reference types="node" />
/// <reference types="pumpify" />
import { Writable } from "stream";
import File from "vinyl";
import { Stage, StageConfig } from "./types";
export declare function isSourceFile(file: File): boolean;
export declare function isPageFile(file: File): string;
/**
 * Creates a pipeline stream that transforms files.
 * @param config Config object containing basic information for the file pipeline
 * @param stages Array of stages to apply to each file
 * @param errors Stream that takes care of all operational error rendering
 * @param bus Stream to pipe events to
 */
export declare function createPipeline(config: StageConfig, stages: Stage[], bus: Writable, source?: {
    stream: NodeJS.ReadWriteStream;
}, writer?: {
    stream: NodeJS.ReadWriteStream;
}): {
    stream: import("pumpify");
    ready: any;
};