import { FS } from '../file/emscriptenFs';
import { File } from '../file/file';
import { NativeResult } from '../imageMagick/createMain';
import { IFile, Options } from '../types';
import { main } from './main';
import { run } from './run';
export declare function isCustomCommand(c: string[]): Promise<boolean>;
/**
 * In [run]'s [script] property, or in commands given to [main], lines starting with `!js:` are be evaluated as a JavaScript function that accept one parameter context which is an object containing utilities that can be used asynchronously. This interface describes such an object. The expression  `!js:` can be configured using [Options].
 *
 * ```js
 * result = await run({
 *  script: `
 *    convert rose: foo.gif
 *    !js: c=>c.pushStdout(FS.readdir('.').join(', '))
 *    !js: async c=> {const f = c.File.asFile(c.files[0]) ; c.pushStdout(JSON.stringify(await f.size())) }
 *  `
 * })
 * ```
 */
export interface CustomCommandContext {
    FS: FS;
    options: Partial<Options>;
    log(...s: string[]): void;
    error(...s: string[]): void;
    File: typeof File;
    writeFile(f: File): void;
    isFile(f: string): boolean;
    readFile(f: string): File;
    isDirectory(f: string): boolean;
    run: typeof run;
    main: typeof main;
    includeOutputFiles(files: (string | IFile)[], exclude?: boolean): void;
}
export interface CustomCommandDispatchOptions {
    command: string[];
    options: Partial<Options>;
    FS: FS;
    /** can be used by custom commands to manipulate outputFiles*/
    outputFiles: File[];
}
export declare function dispatchCustomCommand(o: CustomCommandDispatchOptions): Promise<NativeResult>;