70 lines
2.2 KiB
JavaScript
70 lines
2.2 KiB
JavaScript
import {Duplex} from 'node:stream';
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import {callbackify} from 'node:util';
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import {BINARY_ENCODINGS} from '../arguments/encoding-option.js';
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import {
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getSubprocessStdout,
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getReadableOptions,
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getReadableMethods,
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onStdoutFinished,
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onReadableDestroy,
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} from './readable.js';
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import {
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getSubprocessStdin,
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getWritableMethods,
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onStdinFinished,
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onWritableDestroy,
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} from './writable.js';
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// Create a `Duplex` stream combining both `subprocess.readable()` and `subprocess.writable()`
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export const createDuplex = ({subprocess, concurrentStreams, encoding}, {from, to, binary: binaryOption = true, preserveNewlines = true} = {}) => {
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const binary = binaryOption || BINARY_ENCODINGS.has(encoding);
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const {subprocessStdout, waitReadableDestroy} = getSubprocessStdout(subprocess, from, concurrentStreams);
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const {subprocessStdin, waitWritableFinal, waitWritableDestroy} = getSubprocessStdin(subprocess, to, concurrentStreams);
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const {readableEncoding, readableObjectMode, readableHighWaterMark} = getReadableOptions(subprocessStdout, binary);
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const {read, onStdoutDataDone} = getReadableMethods({
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subprocessStdout,
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subprocess,
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binary,
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encoding,
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preserveNewlines,
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});
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const duplex = new Duplex({
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read,
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...getWritableMethods(subprocessStdin, subprocess, waitWritableFinal),
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destroy: callbackify(onDuplexDestroy.bind(undefined, {
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subprocessStdout,
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subprocessStdin,
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subprocess,
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waitReadableDestroy,
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waitWritableFinal,
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waitWritableDestroy,
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})),
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readableHighWaterMark,
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writableHighWaterMark: subprocessStdin.writableHighWaterMark,
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readableObjectMode,
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writableObjectMode: subprocessStdin.writableObjectMode,
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encoding: readableEncoding,
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});
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onStdoutFinished({
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subprocessStdout,
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onStdoutDataDone,
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readable: duplex,
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subprocess,
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subprocessStdin,
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});
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onStdinFinished(subprocessStdin, duplex, subprocessStdout);
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return duplex;
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};
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const onDuplexDestroy = async ({subprocessStdout, subprocessStdin, subprocess, waitReadableDestroy, waitWritableFinal, waitWritableDestroy}, error) => {
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await Promise.all([
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onReadableDestroy({subprocessStdout, subprocess, waitReadableDestroy}, error),
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onWritableDestroy({
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subprocessStdin,
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subprocess,
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waitWritableFinal,
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waitWritableDestroy,
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}, error),
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]);
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};
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