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58 lines
1.4 KiB
JavaScript

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