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react-native-macos/packages/react-native-codegen/.babelrc

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Codegen: Add prepublish script to build Flow files (#28827) Summary: *This is a follow-up to https://github.com/facebook/react-native/issues/28645, redone using a build script based off of Metro's build script instead of using `flow-remove-types` and `flow-copy-source`.* This pull request adds a build step to `react-native-codegen` that builds the Flow-annotated JS files so that users of the NPM module `react-native-codegen` do not need to use require hooks to be able to import it. A new build script, `scripts/build.js` is added that builds every JS file in `src/` into a `lib/` folder, and also copies over the original Flow annotated files to `lib/` with a `.js.flow` extension, so users of `react-native-codegen` can still typecheck against it using Flow. The shell scripts in `src` are also copied over. It is based off of the [build script from Metro](https://github.com/facebook/metro/blob/00867816eb9b2f69c8af9cebb523e9e4d280671a/scripts/build.js) ## Changelog [General] [Added] - Codegen: Add prepublish script to build Flow files Pull Request resolved: https://github.com/facebook/react-native/pull/28827 Test Plan: I am able to make use of the Codegen scripts without needing to use the `flow-node` CLI or the `flow-remove-types/register` require hook. Reviewed By: cpojer Differential Revision: D21412173 Pulled By: hramos fbshipit-source-id: 26ae67cdd04652ca4700a069a234a25558773cb1
2020-05-09 01:39:11 +03:00
{
"plugins": [
"@babel/plugin-proposal-object-rest-spread",
"@babel/plugin-transform-async-to-generator",
"@babel/plugin-transform-destructuring",
"@babel/plugin-transform-flow-strip-types",
"@babel/plugin-syntax-dynamic-import",
Rewrite ObjC++ module generator Summary: ## Misc. Improvements * We now have 95%+ flow coverage in all generator files. Henceforth, we can make changes to these files with more confidence, and trust flow to catch more errors. This should also improve the DevX of working on these files. * Better templates: Instead of doing string replace with RegExps, we instead use functions and leverage JS template literals to generate our code. A few benefits: (1) data dependencies of templates are clearly visible, and statically checked by flow, (2) the templates are more readable in VSCode. * Merged the GenerateModuleHObjCpp.js and GenerateModuleMm.js generators. They can share a lot of logic, so it's not a good idea to keep them separate. * The ObjC++ module generator no longer generates “dead” structs (i.e structs that aren’t used by type-safety infra). In fact, it explicitly only supports the types in our Wiki. (I know this wasn’t the case with the legacy codegen, because we were generating native code for enums in the legacy codegen). This is a mixed bag. The test to verify correctness will be more difficult to write. However, keeping structs in the codegen needlessly complicates the parsers + generators, and creates technical debt for us to clean up later. ## Abstractions - **StructCollector:** As we serialize NativeModule methods, when we detect an ObjectTypeAnnotation in the return type of `getConstants()` or inside a method param, we must create a Struct JS object for it. When we detect a type-alias (also in the same locations), we must look up that type-alias and create a Struct from its RHS. A Struct is basically an ObjectTypeAnnotation with a context (i.e: used in getConstants() vs as a method param), that cannot contain other ObjectTypeAnnotations. - **serializeMethod.js** Given a NativeModule method type annotation, output the protocol method, JS return type, selector, a record of which params were structs, and which structs. Basically, this is all the information necessary to generate the declaration and implementation codegen for a partiular NativeModule method. - **serializeStruct/*.js**: After creating all these Structs, we need to loop over all of them, and tranform them into ObjC++ code. - **serializeStruct.js**: Depending on the struct context, calls either `serializeRegularStruct.js` or `serializeConstantsStruct.js`. Both of these files have the same layout/abstractions. They look very similar. - **serializeModule.js:** Outputs RCTCxxConvert categories for transforming `NSDictionary *` into C++ structs. Outputs ObjCTurboModule subclass. ## Algorithm ``` for spec in NativeModuleSpecs structCollector = new StructCollector resolveAlias = (aliasName) => nullthrows(spec.aliases[aliasName]) methodDatas = [] for method in methods(spec) methodData.push(serializeMethod(method, structCollector, resolveAlias)) end structs = structCollector.getStructs() output generateImplCodegen(methodDatas, structs) output generateHeaderCodegen(methodDatas, structs) end ``` Changelog: [Internal] Reviewed By: hramos Differential Revision: D23633940 fbshipit-source-id: 7c29f458b65434f4865ef1993061b0f0dc7d04ce
2020-09-30 00:33:06 +03:00
"@babel/plugin-proposal-class-properties",
Codegen: Add prepublish script to build Flow files (#28827) Summary: *This is a follow-up to https://github.com/facebook/react-native/issues/28645, redone using a build script based off of Metro's build script instead of using `flow-remove-types` and `flow-copy-source`.* This pull request adds a build step to `react-native-codegen` that builds the Flow-annotated JS files so that users of the NPM module `react-native-codegen` do not need to use require hooks to be able to import it. A new build script, `scripts/build.js` is added that builds every JS file in `src/` into a `lib/` folder, and also copies over the original Flow annotated files to `lib/` with a `.js.flow` extension, so users of `react-native-codegen` can still typecheck against it using Flow. The shell scripts in `src` are also copied over. It is based off of the [build script from Metro](https://github.com/facebook/metro/blob/00867816eb9b2f69c8af9cebb523e9e4d280671a/scripts/build.js) ## Changelog [General] [Added] - Codegen: Add prepublish script to build Flow files Pull Request resolved: https://github.com/facebook/react-native/pull/28827 Test Plan: I am able to make use of the Codegen scripts without needing to use the `flow-node` CLI or the `flow-remove-types/register` require hook. Reviewed By: cpojer Differential Revision: D21412173 Pulled By: hramos fbshipit-source-id: 26ae67cdd04652ca4700a069a234a25558773cb1
2020-05-09 01:39:11 +03:00
"@babel/plugin-proposal-nullish-coalescing-operator",
"@babel/plugin-proposal-optional-chaining"
]
}