36033bd0ed
Summary: **Summary** The RN transformer currently relies on the enviroment providing babelHelpers and regeneratorRuntime as globals by using 'babel-external-helpers'. This wasn't really a problem before since helpers were stable and we could maintain our copy easily but it seems like there are more now with babel 7 and it makes sense to include only those used by the app. This is exactly what babel/transform-runtime does. It will alias all helpers and calls to regeneratorRuntime to files in the babel/runtime package. This will solve issues like this https://github.com/facebook/react-native/issues/20150 caused by missing babelHelpers. This solution also avoids bloating babelHelpers to fix OSS issues like the one linked before. **Test plan** - Updated tests so they all pass. - Tested that it actually works by applying the changes locally in an RN app. - Added a test for async functions, to make sure regenerator is aliased properly and doesn't depend on the global. - Made sure require-test.js still fails if the require implementation contains babel helpers (by adding an empty class in the file). Pull Request resolved: https://github.com/facebook/metro/pull/198 Reviewed By: mjesun Differential Revision: D8833903 Pulled By: rafeca fbshipit-source-id: 7081f769f288ab358ba89ae8ee72a513bb12e225 |
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| .. | ||
| __tests__ | ||
| MockNativeMethods.js | ||
| assetFileTransformer.js | ||
| hasteImpl.js | ||
| mockComponent.js | ||
| preprocessor.js | ||
| setup.js | ||