execa/types/subprocess/stdio.d.ts

Process execution for humans

import type {StdioOptionNormalizedArray} from '../stdio/array.js';
import type {Options} from '../arguments/options.js';
import type {SubprocessStdioStream} from './stdout.js';

// `subprocess.stdio`
export type SubprocessStdioArray<OptionsType extends Options> = MapStdioStreams<StdioOptionNormalizedArray<OptionsType>, OptionsType>;

// We cannot use mapped types because it must be compatible with Node.js `ChildProcess["stdio"]` which uses a tuple with exactly 5 items
type MapStdioStreams<
	StdioOptionsArrayType,
	OptionsType extends Options,
> = [
	SubprocessStdioStream<'0', OptionsType>,
	SubprocessStdioStream<'1', OptionsType>,
	SubprocessStdioStream<'2', OptionsType>,
	'3' extends keyof StdioOptionsArrayType ? SubprocessStdioStream<'3', OptionsType> : never,
	'4' extends keyof StdioOptionsArrayType ? SubprocessStdioStream<'4', OptionsType> : never,
];