43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
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import {createWriteStream} from 'node:fs';
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import {ChildProcess} from 'node:child_process';
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import {isWritableStream} from 'is-stream';
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const isExecaChildProcess = target => target instanceof ChildProcess && typeof target.then === 'function';
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const pipeToTarget = (spawned, streamName, target) => {
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if (typeof target === 'string') {
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spawned[streamName].pipe(createWriteStream(target));
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return spawned;
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}
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if (isWritableStream(target)) {
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spawned[streamName].pipe(target);
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return spawned;
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}
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if (!isExecaChildProcess(target)) {
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throw new TypeError('The second argument must be a string, a stream or an Execa child process.');
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}
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if (!isWritableStream(target.stdin)) {
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throw new TypeError('The target child process\'s stdin must be available.');
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}
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spawned[streamName].pipe(target.stdin);
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return target;
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};
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export const addPipeMethods = spawned => {
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if (spawned.stdout !== null) {
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spawned.pipeStdout = pipeToTarget.bind(undefined, spawned, 'stdout');
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}
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if (spawned.stderr !== null) {
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spawned.pipeStderr = pipeToTarget.bind(undefined, spawned, 'stderr');
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}
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if (spawned.all !== undefined) {
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spawned.pipeAll = pipeToTarget.bind(undefined, spawned, 'all');
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}
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};
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