Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/42434
Changelog: [internal]
The flags for the event loop were set up using different mechanisms due to the limitations of the previous feature flags systems. Now we can centralize on the new system and use them consistently on Android and iOS.
Reviewed By: RSNara
Differential Revision: D52819137
fbshipit-source-id: e30a6f2e12b4a027a906502b80a70dd48bb657b6
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/42430
This PR creates a new internal feature flags system for React Native. This is only meant to be used internally within the framework, but we might expose it externally in some form in the future to allow customizing specific feature flags in frameworks and applications.
Features:
* 2 types of flags:
* Common: can be overridden from native and are accessible from all layers of the stack (Objective-C/Swift, Java/Kotlin, C++ and JavaScript).
* JS-only: flags that can only be defined and accessed from JS (to allow things like hot reloading without a native build).
* 1 source of truth for each flag.
* Feature flags are application/process scoped (using C++ singletons).
See the `README.md` file in this PR for additional information.
This also adds modifies `run-ci-javascript-tests` to run a new check to make sure that the generate files are in sync with the JSON file that contains the definitions.
Changelog: [internal]
Reviewed By: huntie
Differential Revision: D52806730
fbshipit-source-id: 0ba95803f61ec2f05266ee535921321bf6d3dc6a
Rubén NorteandFacebook GitHub Bot