Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/31543
Changelog:
[iOS][Added] - Description
When compiling iOS apps with flag `-Wnullability-completeness` (like Lightspeed app and soon Instagram), Objective-C headers are required to either have full *explicit* nullability annotations on all members of its public API, or none at all; partially annotated headers will fail to build that module.
RN native modules are currently generated with *partial* annotations. This works today because most apps are not compiled with `-Wnullability-completeness` turned on. But when we flip the switch for Instagram, the app doesn't build due to importing these RN partially annotated modules.
JavsScript Flow types are implied nonnull, and the current RN codegen translates Flow's [maybe/optional](https://flow.org/en/docs/types/maybe/) type to Obj-C `_Nullable` annotation, and everything else without an explicit Obj-C annotation. However this creates a mismatch with the Obj-C type system, where the implied default is *unannotated*, which is handled differently from nonnull when built with the nullability compiler flags.
There is a simple Obj-C macro that automatically adds *explicit nonnull* annotations to all members in a header: `NS_ASSUME_NONNULL_BEGIN` / `NS_ASSUME_NONNULL_END`. If we add this to *all* RN-generated headers, however, we run into issues:
1) We may erroneously assume any previously-unannotated header was meant to be nonnull and cause future bugs
2) Another compiler flag (`-Wnullable-to-nonnull-conversion`) statically analyzes Obj-C implementation code to prevent us from ever passing null to one of these headers. Much existing Obj-C code will break here, and it's ambiguous if these are true or false positives because of the first point.
Instead, in this diff we add a new BUCK flag `ios_assume_nonnull` to let module authors opt into automatic nonnull for unannotated members so that Obj-C headers are generated correctly in alignment with Flow's type system. We can migrate all libraries individually as needed and eventually make this the RN native codegen default.
Reviewed By: RSNara
Differential Revision: D28396446
fbshipit-source-id: ad3a3a97ab19183df4ef504b1c3140596c8f69ca
Summary:
NativeModule schema targets will now take the form '{library_name}-codegen-modules-schema'.
NOTE: Will launch the necessary diffs to make the same refactor in our component codegen.
Changelog: [Internal]
Differential Revision: D25968071
fbshipit-source-id: 1d7c9f4679e4ae6c26c9a29a74fa7b7ea76460eb
Summary:
## Changes
All `rn_library(codegen_modules = True)` must now also specify native_module_android_package_name, like so:
```
rn_library(
name = "FBAuth"
codegen_modules = True,
native_module_spec_name = "Foo",
native_module_android_package_name = "com.facebook.fbreact.specs",
)
```
This will generate the FBAuth Java spec files under the appropriate directory: "com/facebook/fbreact/specs". It will also make the code-generated specs have the appropriate package name: "com.facebook.fbreact.specs".
Changelog: [Internal]
Reviewed By: shergin
Differential Revision: D25723176
fbshipit-source-id: 6efec1cbee43d70110c0ef23e2422e08609b61d4
Summary:
This commit:
* Generate Fabric component Java files along side Java NativeModule specs, when `USE_FABRIC=1` is set
* Adjust the component codegen to place output files in a subdir based on package name
* Adjust existing Buck targets to filter the right nativemodule vs component java files (this avoids duplicated symbols)
* Compiles the Java output during build time on RNTester/ReactAndroid (Gradle)
Not in this commit:
* Fabric C++ files
* Removing checked-in generated component files.
Changelog: [Internal]
Reviewed By: mdvacca
Differential Revision: D25416614
fbshipit-source-id: fd670ead2198c9b5a65812c692b7aed9f3d7cd58
Summary:
This defines a separate codegen entrypoint for the entire react-native repo, picking up all JS files under Libraries/ subdir. Buck can then build the codegen library targets. This is a pre-req for removing the checked in Java spec files for NativeModules.
Changelog: [Internal]
Reviewed By: RSNara
Differential Revision: D24518569
fbshipit-source-id: 2ece53c7274698e2431a00e590fad213e3a0bece
Erich Graham
Ramanpreet Nara
Kevin Gozali