Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35038
React-jsi provides JSI to allow React Native to interface with JavaScriptCore.
The hermes-engine Pod provides a second copy of JSI, as Hermes is built and linked statically with JSI.
This second copy of JSI would lead to an [ODR Violation](https://en.cppreference.com/w/cpp/language/definition).
To resolve this, when Hermes is enabled:
- React-hermes and hermes-engine are installed.
- React-jsc is not installed.
- React-jsi continues to be installed.
- React-jsi will not build JSI.
- React-jsi will declare a dependency on hermes-engine.
The result is that the JSI dependency for React Native is satisfied by hermes-engine, and there is no duplicate JSI library in the project.
When Hermes is disabled:
- React-jsi and React-jsc are installed.
- React-hermes and hermes-engine are not installed.
- React-jsi will build JSI.
Changelog:
[iOS][Changed] Resolve JSI ODR violation, make hermes-engine the JSI provider when Hermes is enabled
Reviewed By: cipolleschi
Differential Revision: D40334913
fbshipit-source-id: 409407a193a35cbd21b0e8778537b3627e4c54a2
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35031
The React-jsi Pod was serving two purposes: building JSI, and configuring JavaScriptCore as the JS engine.
By splitting the React-jsi Pod into React-jsi and React-jsi, we can start working towards de-coupling the JSI dependency from any particular JS engine.
Pods that depended on React-jsi, now depend on React-jsi and React-jsc.
One exception to this is React-hermes, which is only installed when Hermes is enabled, and thus does not require JavaScriptCore.
Upcoming commits should take care of removing the React-jsc dependency when Hermes is enabled, but it is out of scope for this commit.
Changelog:
[iOS][Changed] - The JSC Runtime is now provided by the React-jsc Pod instead of React-jsi. Libraries that declared a dependency on React-jsi in order to specifically create a JSC runtime (`makeJSCRuntime()`) will need to add React-jsc to their dependencies.
Reviewed By: dmytrorykun
Differential Revision: D40442603
fbshipit-source-id: b9b21146b9deb401f80cfef76a87c9867754a953
Summary:
The jsi library itself is `jsi/jsi.{h,cpp}`. JSIDynamic provides support for converting between folly::dynamic and jsi::value, independent of the jsi library.
Changelog:
[iOS][Changed] Moved JSIDynamic out of React-jsi and into React-jsidynamic
Reviewed By: cipolleschi, dmytrorykun
Differential Revision: D40334023
fbshipit-source-id: d2c69e7afb7f43f93080301b88c81e1fa46279d7
Héctor Ramos