25 lines
950 B
JavaScript
25 lines
950 B
JavaScript
// Like Bash, we await both subprocesses. This is unlike some other shells which only await the destination subprocess.
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// Like Bash with the `pipefail` option, if either subprocess fails, the whole pipe fails.
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// Like Bash, if both subprocesses fail, we return the failure of the destination.
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// This ensures both subprocesses' errors are present, using `error.pipedFrom`.
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export const waitForBothSubprocesses = async subprocessPromises => {
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const [
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{status: sourceStatus, reason: sourceReason, value: sourceResult = sourceReason},
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{status: destinationStatus, reason: destinationReason, value: destinationResult = destinationReason},
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] = await subprocessPromises;
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if (!destinationResult.pipedFrom.includes(sourceResult)) {
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destinationResult.pipedFrom.push(sourceResult);
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}
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if (destinationStatus === 'rejected') {
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throw destinationResult;
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}
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if (sourceStatus === 'rejected') {
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throw sourceResult;
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}
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return destinationResult;
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};
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