v7

node_modules/jest-config/build/getMaxWorkers.js

@@ -0,0 +1,58 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = getMaxWorkers;
+
+function _os() {
+  const data = _interopRequireDefault(require('os'));
+
+  _os = function _os() {
+    return data;
+  };
+
+  return data;
+}
+
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+
+/**
+ * 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 cpus = _os().default.cpus() ? _os().default.cpus().length : 1;
+    return Math.max(argv.watch ? Math.floor(cpus / 2) : cpus - 1, 1);
+  }
+}
+
+const parseWorkers = maxWorkers => {
+  const parsed = parseInt(maxWorkers.toString(), 10);
+
+  if (
+    typeof maxWorkers === 'string' &&
+    maxWorkers.trim().endsWith('%') &&
+    parsed > 0 &&
+    parsed <= 100
+  ) {
+    const cpus = _os().default.cpus().length;
+
+    const workers = Math.floor((parsed / 100) * cpus);
+    return workers >= 1 ? workers : 1;
+  }
+
+  return parsed > 0 ? parsed : 1;
+};