/** * Copyright (c) 2015-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */ 'use strict'; module.exports = function getCacheIdentifier(environment, packages) { let cacheIdentifier = environment == null ? '' : environment.toString(); for (const packageName of packages) { cacheIdentifier += `:${packageName}@`; try { cacheIdentifier += require(`${packageName}/package.json`).version; } catch (_) { // ignored } } return cacheIdentifier; };