57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.default = getMaxWorkers;
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function _os() {
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const data = require('os');
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_os = function () {
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return data;
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};
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return data;
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}
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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function getNumCpus() {
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return typeof _os().availableParallelism === 'function'
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? (0, _os().availableParallelism)()
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: (0, _os().cpus)()?.length ?? 1;
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}
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function getMaxWorkers(argv, defaultOptions) {
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if (argv.runInBand) {
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return 1;
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} else if (argv.maxWorkers) {
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return parseWorkers(argv.maxWorkers);
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} else if (defaultOptions && defaultOptions.maxWorkers) {
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return parseWorkers(defaultOptions.maxWorkers);
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} else {
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// In watch mode, Jest should be unobtrusive and not use all available CPUs.
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const numCpus = getNumCpus();
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const isWatchModeEnabled = argv.watch || argv.watchAll;
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return Math.max(
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isWatchModeEnabled ? Math.floor(numCpus / 2) : numCpus - 1,
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1
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);
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}
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}
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const parseWorkers = maxWorkers => {
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const parsed = parseInt(maxWorkers.toString(), 10);
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if (
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typeof maxWorkers === 'string' &&
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maxWorkers.trim().endsWith('%') &&
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parsed > 0 &&
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parsed <= 100
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) {
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const numCpus = getNumCpus();
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const workers = Math.floor((parsed / 100) * numCpus);
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return Math.max(workers, 1);
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}
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return parsed > 0 ? parsed : 1;
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};
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