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d5e9e55fa3
Summary: This PR removes the need for having the `providesModule` tags in all the modules in the repository. It configures Flow, Jest and Metro to get the module names from the filenames (`Libraries/Animated/src/nodes/AnimatedInterpolation.js` => `AnimatedInterpolation`) * Checked the Flow configuration by running flow on the project root (no errors): ``` yarn flow ``` * Checked the Jest configuration by running the tests with a clean cache: ``` yarn jest --clearCache && yarn test ``` * Checked the Metro configuration by starting the server with a clean cache and requesting some bundles: ``` yarn run start --reset-cache curl 'localhost:8081/IntegrationTests/AccessibilityManagerTest.bundle?platform=android' curl 'localhost:8081/Libraries/Alert/Alert.bundle?platform=ios' ``` [INTERNAL] [FEATURE] [All] - Removed providesModule from all modules and configured tools. Closes https://github.com/facebook/react-native/pull/18995 Reviewed By: mjesun Differential Revision: D7729509 Pulled By: rubennorte fbshipit-source-id: 892f760a05ce1fddb088ff0cd2e97e521fb8e825
65 lines
1.7 KiB
JavaScript
65 lines
1.7 KiB
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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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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* @flow
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*/
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'use strict';
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/**
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* Defines a lazily evaluated property on the supplied `object`.
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*/
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function defineLazyObjectProperty<T>(
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object: Object,
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name: string,
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descriptor: {
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get: () => T,
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enumerable?: boolean,
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writable?: boolean,
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},
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): void {
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const {get} = descriptor;
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const enumerable = descriptor.enumerable !== false;
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const writable = descriptor.writable !== false;
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let value;
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let valueSet = false;
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function getValue(): T {
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// WORKAROUND: A weird infinite loop occurs where calling `getValue` calls
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// `setValue` which calls `Object.defineProperty` which somehow triggers
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// `getValue` again. Adding `valueSet` breaks this loop.
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if (!valueSet) {
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// Calling `get()` here can trigger an infinite loop if it fails to
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// remove the getter on the property, which can happen when executing
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// JS in a V8 context. `valueSet = true` will break this loop, and
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// sets the value of the property to undefined, until the code in `get()`
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// finishes, at which point the property is set to the correct value.
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valueSet = true;
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setValue(get());
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}
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return value;
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}
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function setValue(newValue: T): void {
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value = newValue;
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valueSet = true;
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Object.defineProperty(object, name, {
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value: newValue,
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configurable: true,
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enumerable,
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writable,
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});
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}
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Object.defineProperty(object, name, {
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get: getValue,
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set: setValue,
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configurable: true,
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enumerable,
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});
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}
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module.exports = defineLazyObjectProperty;
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