Update flow parser to use codegenNativeComponent

Summary:
This diff updated the codegen flow types syntax replacing:

```
type Options = {
  isDeprecatedPaperComponentNameRCT: true,
};

type ActivityIndicatorNativeType = CodegenNativeComponent<
  'ActivityIndicatorView',
  NativeProps,
  Options,
>;

module.exports = ((requireNativeComponent(
  'RCTActivityIndicatorView',
): any): ActivityIndicatorNativeType);
```
with:

```
export default codegenNativeComponent<NativeProps>('ActivityIndicatorView', {
  isDeprecatedPaperComponentNameRCT: true,
});
```

This is from Tim's comment in the [View Config Codegen Quip](https://fb.quip.com/jR2aASHad4Se):

> What it CodegenNativeComponent were instead `NativeComponent.fromFlow<T>('…')` that returned `'...'`?
>And the Babel plugin swapped it for NativeComponent.fromSchema('...', {…}) which would both register and return '...'?

I went with `codegenNativeComponent` because it has nice parity with `requireNativeComponent`

I also didn't update the babel output here (we can update that whenever) because I think `registerGeneratedViewConfig` is more clear for what it's doing

Reviewed By: cpojer

Differential Revision: D15602077

fbshipit-source-id: 2d24dc32136ba6d31724f8c929b51417ba625a58

Libraries/Components/ActivityIndicator/ActivityIndicator.js

@@ -21,7 +21,7 @@ import type {ViewProps} from '../View/ViewPropTypes';
 const PlatformActivityIndicator =
   Platform.OS === 'android'
     ? require('../ProgressBarAndroid/ProgressBarAndroid')
-    : require('./ActivityIndicatorViewNativeComponent');
+    : require('./ActivityIndicatorViewNativeComponent').default;
 
 const GRAY = '#999999';
 

Libraries/Components/ActivityIndicator/ActivityIndicatorViewNativeComponent.js

@@ -10,15 +10,12 @@
 
 'use strict';
 
-import type {
-  WithDefault,
-  CodegenNativeComponent,
-} from '../../Types/CodegenTypes';
+import type {WithDefault} from '../../Types/CodegenTypes';
 
 import type {ColorValue} from '../../StyleSheet/StyleSheetTypes';
 import type {ViewProps} from '../View/ViewPropTypes';
 
-const requireNativeComponent = require('../../ReactNative/requireNativeComponent');
+import codegenNativeComponent from '../../Utilities/codegenNativeComponent';
 
 type NativeProps = $ReadOnly<{|
   ...ViewProps,
@@ -53,16 +50,6 @@ type NativeProps = $ReadOnly<{|
   size?: ?WithDefault<'small' | 'large', 'small'>,
 |}>;
 
-type Options = {
+export default codegenNativeComponent<NativeProps>('ActivityIndicatorView', {
   isDeprecatedPaperComponentNameRCT: true,
-};
-
-type ActivityIndicatorNativeType = CodegenNativeComponent<
-  'ActivityIndicatorView',
-  NativeProps,
-  Options,
->;
-
-module.exports = ((requireNativeComponent(
-  'RCTActivityIndicatorView',
-): any): ActivityIndicatorNativeType);
+});

Libraries/Components/Slider/SliderNativeComponent.js

@@ -15,15 +15,14 @@ import type {
   BubblingEvent,
   DirectEvent,
   WithDefault,
-  CodegenNativeComponent,
 } from '../../Types/CodegenTypes';
 
+import codegenNativeComponent from '../../Utilities/codegenNativeComponent';
+
 import type {ColorValue} from '../../StyleSheet/StyleSheetTypes';
 import type {ImageSource} from '../../Image/ImageSource';
 import type {ViewProps} from '../View/ViewPropTypes';
 
-const requireNativeComponent = require('../../ReactNative/requireNativeComponent');
-
 type Event = $ReadOnly<{|
   value: Float,
   fromUser?: boolean,
@@ -54,11 +53,7 @@ type NativeProps = $ReadOnly<{|
   onSlidingComplete?: ?(event: DirectEvent<Event>) => void,
 |}>;
 
-type Options = {
+module.exports = codegenNativeComponent<NativeProps>('Slider', {
   interfaceOnly: true,
   isDeprecatedPaperComponentNameRCT: true,
-};
-
-type SliderType = CodegenNativeComponent<'Slider', NativeProps, Options>;
-
-module.exports = ((requireNativeComponent('RCTSlider'): any): SliderType);
+});

Libraries/Types/CodegenTypes.js

@@ -26,13 +26,6 @@ export type Int32 = number;
 //
 // TODO: (rickhanlonii) T44881457 If a default is provided, it should always be optional
 //  but that is currently not supported in the codegen since we require a default
-// eslint-disable-next-line no-unused-vars
-export type WithDefault<Type: number | boolean | string, Value: Type> = Type;
-
-// We're not using ComponentName or Options in JS
-// We only use these types to codegen native code
 //
 // eslint-disable-next-line no-unused-vars
-export type CodegenNativeComponent<ComponentName, Props, Options = {}> = Class<
-  NativeComponent<Props>,
->;
+export type WithDefault<Type: number | boolean | string, Value: Type> = Type;

Libraries/Utilities/codegenNativeComponent.js

@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @flow
+ */
+// TODO: move this file to shims/ReactNative (requires React update and sync)
+
+'use strict';
+
+import type {NativeComponent} from '../../Libraries/Renderer/shims/ReactNative';
+import requireNativeComponent from '../../Libraries/ReactNative/requireNativeComponent';
+
+// TODO: import from CodegenSchema once workspaces are enabled
+type Options = $ReadOnly<{|
+  interfaceOnly?: boolean,
+  isDeprecatedPaperComponentNameRCT?: boolean,
+|}>;
+
+function codegenNativeComponent<Props>(
+  componentName: string,
+  options?: Options,
+): Class<NativeComponent<Props>> {
+  let componentNameInUse = componentName;
+  if (options && options.isDeprecatedPaperComponentNameRCT === true) {
+    componentNameInUse = `RCT${componentName}`;
+  }
+
+  // If this function is run at runtime then that means the view configs were not
+  // generated with the view config babel plugin, so we need to require the native component.
+  //
+  // This will be useful during migration, but eventually this will error.
+  return ((requireNativeComponent(componentNameInUse): any): Class<
+    NativeComponent<Props>,
+  >);
+}
+
+export default codegenNativeComponent;

packages/babel-plugin-inline-view-configs/__test_fixtures__/fixtures.js

@@ -16,13 +16,12 @@ export default 'Not a view config'
 `;
 
 const FULL_NATIVE_COMPONENT = `
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   BubblingEvent,
   DirectEvent,
   WithDefault,
-  CodegenNativeComponent,
 } from 'CodegenFlowtypes';
 
 import type {ViewProps} from 'ViewPropTypes';
@@ -38,14 +37,10 @@ type ModuleProps = $ReadOnly<{|
   onBubblingEventDefinedInlineNull: (event: BubblingEvent<null>) => void,
 |}>;
 
-type Options = {
+export default codegenNativeComponent<ModuleProps>('Module', {
   interfaceOnly: true,
   isDeprecatedPaperComponentNameRCT: true,
-};
-
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps, Options>;
-
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+});
 `;
 
 module.exports = {

packages/babel-plugin-inline-view-configs/__tests__/__snapshots__/index-test.js.snap

@@ -1,9 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Babel plugin inline view configs can inline config for FullNativeComponent.js 1`] = `
-"const requireNativeComponent = require('requireNativeComponent');
+"const codegenNativeComponent = require('codegenNativeComponent');
 
-import type { BubblingEvent, DirectEvent, WithDefault, CodegenNativeComponent } from 'CodegenFlowtypes';
+import type { BubblingEvent, DirectEvent, WithDefault } from 'CodegenFlowtypes';
 import type { ViewProps } from 'ViewPropTypes';
 type ModuleProps = $ReadOnly<{| ...ViewProps,
   // Props
@@ -12,11 +12,6 @@ type ModuleProps = $ReadOnly<{| ...ViewProps,
   onDirectEventDefinedInlineNull: (event: DirectEvent<null>) => void,
   onBubblingEventDefinedInlineNull: (event: BubblingEvent<null>) => void,
 |}>;
-type Options = {
-  interfaceOnly: true,
-  isDeprecatedPaperComponentNameRCT: true,
-};
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps, Options>;
 
 const registerGeneratedViewConfig = require('registerGeneratedViewConfig');
 
@@ -42,7 +37,7 @@ const ModuleViewConfig = {
   }
 };
 registerGeneratedViewConfig('RCTModule', ModuleViewConfig);
-module.exports = 'RCTModule'; // RCT prefix present for paper support"
+export default 'RCTModule'; // RCT prefix present for paper support"
 `;
 
 exports[`Babel plugin inline view configs can inline config for NotANativeComponent.js 1`] = `

packages/babel-plugin-inline-view-configs/index.js

@@ -25,33 +25,39 @@ function generateViewConfig(filename, code) {
   });
 }
 
+function isCodegenDeclaration(declaration) {
+  if (!declaration) {
+    return false;
+  }
+
+  if (
+    declaration.left &&
+    declaration.left.left &&
+    declaration.left.left.name === 'codegenNativeComponent'
+  ) {
+    return true;
+  } else if (
+    declaration.callee &&
+    declaration.callee.name &&
+    declaration.callee.name === 'codegenNativeComponent'
+  ) {
+    return true;
+  }
+
+  return false;
+}
+
 module.exports = function(context) {
   return {
     pre(state) {
       this.code = state.code;
       this.filename = state.opts.filename;
-      this.inserted = false;
     },
     visitor: {
-      TypeAlias(nodePath, state) {
-        if (
-          !this.inserted &&
-          nodePath.node.right &&
-          nodePath.node.right.type === 'GenericTypeAnnotation' &&
-          nodePath.node.right.id.name === 'CodegenNativeComponent'
-        ) {
-          const code = generateViewConfig(this.filename, this.code);
-
-          // Remove the original export
-          nodePath.parentPath.traverse({
-            MemberExpression(exportPath) {
-              if (exportPath.node.property.name === 'exports') {
-                exportPath.parentPath.remove();
-              }
-            },
-          });
-          nodePath.insertAfter(context.parse(code).program.body);
-          this.inserted = true;
+      ExportDefaultDeclaration(nodePath, state) {
+        if (isCodegenDeclaration(nodePath.node.declaration)) {
+          const viewConfig = generateViewConfig(this.filename, this.code);
+          nodePath.replaceWithMultiple(context.parse(viewConfig).program.body);
         }
       },
     },

packages/react-native-codegen/src/generators/GenerateViewConfigJs.js

@@ -89,7 +89,7 @@ const ::_COMPONENT_NAME_::ViewConfig = VIEW_CONFIG;
 
 registerGeneratedViewConfig('::_COMPONENT_NAME_WITH_COMPAT_SUPPORT_::', ::_COMPONENT_NAME_::ViewConfig);
 
-module.exports = '::_COMPONENT_NAME_WITH_COMPAT_SUPPORT_::';::_COMPAT_COMMENT_::
+export default '::_COMPONENT_NAME_WITH_COMPAT_SUPPORT_::';::_COMPAT_COMMENT_::
 `.trim();
 
 // Replicates the behavior of RCTNormalizeInputEventName in RCTEventDispatcher.m

packages/react-native-codegen/src/generators/__tests__/__snapshots__/GenerateViewConfigJs-test.js.snap

@@ -32,7 +32,7 @@ const ArrayPropsNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('ArrayPropsNativeComponent', ArrayPropsNativeComponentViewConfig);
 
-module.exports = 'ArrayPropsNativeComponent';
+export default 'ArrayPropsNativeComponent';
 ",
 }
 `;
@@ -63,7 +63,7 @@ const BooleanPropNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('BooleanPropNativeComponent', BooleanPropNativeComponentViewConfig);
 
-module.exports = 'BooleanPropNativeComponent';
+export default 'BooleanPropNativeComponent';
 ",
 }
 `;
@@ -94,7 +94,7 @@ const ColorPropNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('ColorPropNativeComponent', ColorPropNativeComponentViewConfig);
 
-module.exports = 'ColorPropNativeComponent';
+export default 'ColorPropNativeComponent';
 ",
 }
 `;
@@ -125,7 +125,7 @@ const EnumPropsNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('EnumPropsNativeComponent', EnumPropsNativeComponentViewConfig);
 
-module.exports = 'EnumPropsNativeComponent';
+export default 'EnumPropsNativeComponent';
 ",
 }
 `;
@@ -166,7 +166,7 @@ const EventsNestedObjectNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('EventsNestedObjectNativeComponent', EventsNestedObjectNativeComponentViewConfig);
 
-module.exports = 'EventsNestedObjectNativeComponent';
+export default 'EventsNestedObjectNativeComponent';
 ",
 }
 `;
@@ -222,7 +222,7 @@ const EventsNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('EventsNativeComponent', EventsNativeComponentViewConfig);
 
-module.exports = 'EventsNativeComponent';
+export default 'EventsNativeComponent';
 ",
 }
 `;
@@ -258,7 +258,7 @@ const FloatPropNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('FloatPropNativeComponent', FloatPropNativeComponentViewConfig);
 
-module.exports = 'FloatPropNativeComponent';
+export default 'FloatPropNativeComponent';
 ",
 }
 `;
@@ -289,7 +289,7 @@ const ImagePropNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('ImagePropNativeComponent', ImagePropNativeComponentViewConfig);
 
-module.exports = 'ImagePropNativeComponent';
+export default 'ImagePropNativeComponent';
 ",
 }
 `;
@@ -322,7 +322,7 @@ const IntegerPropNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('IntegerPropNativeComponent', IntegerPropNativeComponentViewConfig);
 
-module.exports = 'IntegerPropNativeComponent';
+export default 'IntegerPropNativeComponent';
 ",
 }
 `;
@@ -363,7 +363,7 @@ const InterfaceOnlyComponentViewConfig = {
 
 registerGeneratedViewConfig('RCTInterfaceOnlyComponent', InterfaceOnlyComponentViewConfig);
 
-module.exports = 'RCTInterfaceOnlyComponent'; // RCT prefix present for paper support
+export default 'RCTInterfaceOnlyComponent'; // RCT prefix present for paper support
 ",
 }
 `;
@@ -397,7 +397,7 @@ const ImageColorPropNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('ImageColorPropNativeComponent', ImageColorPropNativeComponentViewConfig);
 
-module.exports = 'ImageColorPropNativeComponent';
+export default 'ImageColorPropNativeComponent';
 ",
 }
 `;
@@ -428,7 +428,7 @@ const PointPropNativeComponentViewConfig = {
 
 registerGeneratedViewConfig('PointPropNativeComponent', PointPropNativeComponentViewConfig);
 
-module.exports = 'PointPropNativeComponent';
+export default 'PointPropNativeComponent';
 ",
 }
 `;
@@ -459,7 +459,7 @@ const StringPropComponentViewConfig = {
 
 registerGeneratedViewConfig('StringPropComponent', StringPropComponentViewConfig);
 
-module.exports = 'StringPropComponent';
+export default 'StringPropComponent';
 ",
 }
 `;
@@ -490,7 +490,7 @@ const MultiFile1NativeComponentViewConfig = {
 
 registerGeneratedViewConfig('MultiFile1NativeComponent', MultiFile1NativeComponentViewConfig);
 
-module.exports = 'MultiFile1NativeComponent';
+export default 'MultiFile1NativeComponent';
 
 const MultiFile2NativeComponentViewConfig = {
   uiViewClassName: 'MultiFile2NativeComponent',
@@ -502,7 +502,7 @@ const MultiFile2NativeComponentViewConfig = {
 
 registerGeneratedViewConfig('MultiFile2NativeComponent', MultiFile2NativeComponentViewConfig);
 
-module.exports = 'MultiFile2NativeComponent';
+export default 'MultiFile2NativeComponent';
 ",
 }
 `;
@@ -533,7 +533,7 @@ const MultiComponent1NativeComponentViewConfig = {
 
 registerGeneratedViewConfig('MultiComponent1NativeComponent', MultiComponent1NativeComponentViewConfig);
 
-module.exports = 'MultiComponent1NativeComponent';
+export default 'MultiComponent1NativeComponent';
 
 const MultiComponent2NativeComponentViewConfig = {
   uiViewClassName: 'MultiComponent2NativeComponent',
@@ -545,7 +545,7 @@ const MultiComponent2NativeComponentViewConfig = {
 
 registerGeneratedViewConfig('MultiComponent2NativeComponent', MultiComponent2NativeComponentViewConfig);
 
-module.exports = 'MultiComponent2NativeComponent';
+export default 'MultiComponent2NativeComponent';
 ",
 }
 `;

packages/react-native-codegen/src/parsers/flow/__test_fixtures__/fixtures.js

@@ -55,6 +55,7 @@ const EVENT_DEFINITION = `
     }
   }
 `;
+
 const ONE_OF_EACH_PROP_EVENT_DEFAULT_AND_OPTIONS = `
 /**
  * Copyright (c) Facebook, Inc. and its affiliates.
@@ -68,14 +69,13 @@ const ONE_OF_EACH_PROP_EVENT_DEFAULT_AND_OPTIONS = `
 
 'use strict';
 
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   BubblingEvent,
   DirectEvent,
   WithDefault,
-  CodegenNativeComponent,
-} from 'CodegenFlowtypes';
+} from 'CodegenTypes';
 
 import type {ViewProps} from 'ViewPropTypes';
 
@@ -90,14 +90,10 @@ type ModuleProps = $ReadOnly<{|
   onBubblingEventDefinedInlineNull: (event: BubblingEvent<null>) => void,
 |}>;
 
-type Options = {
+export default codegenNativeComponent<ModuleProps>('Module', {
   interfaceOnly: true,
   isDeprecatedPaperComponentNameRCT: true,
-};
-
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps, Options>;
-
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+});
 `;
 
 const ALL_PROP_TYPES_NO_EVENTS = `
@@ -113,14 +109,13 @@ const ALL_PROP_TYPES_NO_EVENTS = `
 
 'use strict';
 
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   Int32,
   Float,
   WithDefault,
-  CodegenNativeComponent,
-} from 'CodegenFlowtypes';
+} from 'CodegenTypes';
 
 import type {ColorValue, ColorArrayValue, PointValue} from 'StyleSheetTypes';
 import type {ImageSource} from 'ImageSource';
@@ -184,9 +179,7 @@ type ModuleProps = $ReadOnly<{|
   point_optional_both?: ?PointValue,
 |}>;
 
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps, Options>;
-
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+export default codegenNativeComponent<ModuleProps, Options>('Module');
 `;
 
 const ARRAY_PROP_TYPES_NO_EVENTS = `
@@ -202,14 +195,13 @@ const ARRAY_PROP_TYPES_NO_EVENTS = `
 
 'use strict';
 
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   Int32,
   Float,
   WithDefault,
-  CodegenNativeComponent,
-} from 'CodegenFlowtypes';
+} from 'CodegenTypes';
 
 import type {ColorValue, PointValue} from 'StyleSheetTypes';
 import type {ImageSource} from 'ImageSource';
@@ -268,9 +260,7 @@ type ModuleProps = $ReadOnly<{|
   array_point_optional_both?: ?$ReadOnlyArray<PointValue>,
 |}>;
 
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps, Options>;
-
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+export default codegenNativeComponent<ModuleProps>('Module');
 `;
 
 const EVENTS_DEFINED_INLINE_WITH_ALL_TYPES = `
@@ -286,15 +276,14 @@ const EVENTS_DEFINED_INLINE_WITH_ALL_TYPES = `
 
 'use strict';
 
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   Int32,
   Float,
   BubblingEvent,
   DirectEvent,
-  CodegenNativeComponent,
-} from 'CodegenFlowtypes';
+} from 'CodegenTypes';
 
 import type {ViewProps} from 'ViewPropTypes';
 
@@ -368,9 +357,7 @@ type ModuleProps = $ReadOnly<{|
   ) => void,
 |}>;
 
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps>;
-
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+export default codegenNativeComponent<ModuleProps>('Module');
 `;
 
 const EVENTS_DEFINED_IN_FILE_WITH_ALL_TYPES = `
@@ -386,15 +373,14 @@ const EVENTS_DEFINED_IN_FILE_WITH_ALL_TYPES = `
 
 'use strict';
 
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   Float,
   Int32,
   BubblingEvent,
   DirectEvent,
-  CodegenNativeComponent,
-} from 'CodegenFlowtypes';
+} from 'CodegenTypes';
 
 import type {ViewProps} from 'ViewPropTypes';
 
@@ -430,9 +416,7 @@ type ModuleProps = $ReadOnly<{|
   ) => void,
 |}>;
 
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps>;
-
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+export default codegenNativeComponent<ModuleProps>('Module');
 `;
 
 const EVENTS_DEFINED_AS_NULL_IN_FILE = `
@@ -448,13 +432,12 @@ const EVENTS_DEFINED_AS_NULL_IN_FILE = `
 
 'use strict';
 
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   BubblingEvent,
   DirectEvent,
-  CodegenNativeComponent,
-} from 'CodegenFlowtypes';
+} from 'CodegenTypes';
 
 import type {ViewProps} from 'ViewPropTypes';
 
@@ -492,9 +475,8 @@ type ModuleProps = $ReadOnly<{|
   ) => void,
 |}>;
 
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps>;
 
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+export default codegenNativeComponent<ModuleProps>('Module');
 `;
 
 const EVENTS_DEFINED_AS_NULL_INLINE = `
@@ -510,13 +492,12 @@ const EVENTS_DEFINED_AS_NULL_INLINE = `
 
 'use strict';
 
-const requireNativeComponent = require('requireNativeComponent');
+const codegenNativeComponent = require('codegenNativeComponent');
 
 import type {
   BubblingEvent,
   DirectEvent,
-  CodegenNativeComponent,
-} from 'CodegenFlowtypes';
+} from 'CodegenTypese';
 
 import type {ViewProps} from 'ViewPropTypes';
 
@@ -549,9 +530,7 @@ type ModuleProps = $ReadOnly<{|
   ) => void,
 |}>;
 
-type ModuleType = CodegenNativeComponent<'Module', ModuleProps>;
-
-module.exports = ((requireNativeComponent('RCTModule'): any): ModuleType);
+export default codegenNativeComponent<ModuleProps>('Module');
 `;
 
 module.exports = {

packages/react-native-codegen/src/parsers/flow/index.js

@@ -20,19 +20,24 @@ const {getProps} = require('./props');
 const {getOptions} = require('./options');
 const {getExtendsProps} = require('./extends');
 
-function findConfig(types) {
+function findConfig(ast) {
   const foundConfigs = [];
 
-  Object.keys(types).forEach(key => {
+  const allExports = ast.body.filter(
+    node => node.type === 'ExportDefaultDeclaration',
+  );
+
+  allExports.forEach(statement => {
     try {
-      const type = types[key];
-      if (type.right.id.name === 'CodegenNativeComponent') {
-        const params = type.right.typeParameters.params;
+      if (statement.declaration.callee.name === 'codegenNativeComponent') {
+        const typeArgumentParams = statement.declaration.typeArguments.params;
+        const funcArgumentParams = statement.declaration.arguments;
+
         const nativeComponentType = {};
-        nativeComponentType.componentName = params[0].value;
-        nativeComponentType.propsTypeName = params[1].id.name;
-        if (params.length > 2) {
-          nativeComponentType.optionsTypeName = params[2].id.name;
+        nativeComponentType.propsTypeName = typeArgumentParams[0].id.name;
+        nativeComponentType.componentName = funcArgumentParams[0].value;
+        if (funcArgumentParams.length > 1) {
+          nativeComponentType.optionsExpression = funcArgumentParams[1];
         }
         foundConfigs.push(nativeComponentType);
       }
@@ -75,12 +80,12 @@ function processString(contents: string) {
   const ast = flowParser.parse(contents);
 
   const types = getTypes(ast);
-  const {componentName, propsTypeName, optionsTypeName} = findConfig(types);
+  const {componentName, propsTypeName, optionsExpression} = findConfig(ast);
 
   const propProperties = getPropProperties(propsTypeName, types);
 
   const extendsProps = getExtendsProps(propProperties);
-  const options = getOptions(types[optionsTypeName]);
+  const options = getOptions(optionsExpression);
 
   const props = getProps(propProperties);
   const events = getEvents(propProperties, types);

packages/react-native-codegen/src/parsers/flow/options.js

@@ -15,12 +15,12 @@ import type {OptionsShape} from '../../CodegenSchema.js';
 // $FlowFixMe there's no flowtype for ASTs
 type OptionsAST = Object;
 
-function getOptions(optionsDefinition: OptionsAST): ?OptionsShape {
-  if (!optionsDefinition) {
+function getOptions(optionsExpression: OptionsAST): ?OptionsShape {
+  if (!optionsExpression) {
     return null;
   }
   try {
-    return optionsDefinition.right.properties.reduce((options, prop) => {
+    return optionsExpression.properties.reduce((options, prop) => {
       options[prop.key.name] = prop.value.value;
       return options;
     }, {});