From fae9a8df5a4dba7f70d4e2c2af2ff8f231ebaa82 Mon Sep 17 00:00:00 2001
From: Arushi Kesarwani <arushikesarwani@meta.com>
Date: Mon, 2 Jun 2025 13:41:36 -0700
Subject: [PATCH] Splitting RN Core into 3

Summary:
In order to avoid the duplicate dependency caused by FAC due to including core components twice, splitting the RN Core into 3 groups:
1. interfaceOnly: true components
2. UnimplementedNativeViewNativeComponent.js
3. Everything Else

Changelog:
[General][Added] Splitting RN Core to interfaceOnly:true, UnimplementedNativeViewNativeComponent.js and everything else

Differential Revision: D75796413
---
 .../cli/combine/combine-js-to-schema-cli.js   |  15 +++
 .../src/cli/combine/combine-js-to-schema.js   | 127 ++++++++++++++----
 2 files changed, 118 insertions(+), 24 deletions(-)

diff --git a/packages/react-native-codegen/src/cli/combine/combine-js-to-schema-cli.js b/packages/react-native-codegen/src/cli/combine/combine-js-to-schema-cli.js
index 5049b34f8a94..7f715afd7a6d 100644
--- a/packages/react-native-codegen/src/cli/combine/combine-js-to-schema-cli.js
+++ b/packages/react-native-codegen/src/cli/combine/combine-js-to-schema-cli.js
@@ -28,6 +28,17 @@ const argv = yargs
     alias: 'exclude',
     default: null,
   })
+  .option('exclude-interface-only', {
+    describe: 'Exclude components with interfaceOnly: true',
+    type: 'boolean',
+    default: false,
+  })
+  .option('exclude-unimplemented', {
+    describe:
+      'Exclude component named UnimplementedNativeViewNativeComponent.js',
+    type: 'boolean',
+    default: false,
+  })
   .parseSync();
 
 const [outfile, ...fileList] = argv._;
@@ -35,10 +46,14 @@ const platform: ?string = argv.platform;
 const exclude: string = argv.exclude;
 const excludeRegExp: ?RegExp =
   exclude != null && exclude !== '' ? new RegExp(exclude) : null;
+const excludeInterfaceOnly: boolean = argv['exclude-interface-only'];
+const excludeUnimplemented: boolean = argv['exclude-unimplemented'];
 
 combineSchemasInFileListAndWriteToFile(
   fileList,
   platform != null ? platform.toLowerCase() : platform,
   outfile,
   excludeRegExp,
+  excludeInterfaceOnly,
+  excludeUnimplemented,
 );
diff --git a/packages/react-native-codegen/src/cli/combine/combine-js-to-schema.js b/packages/react-native-codegen/src/cli/combine/combine-js-to-schema.js
index c47e3a765559..1d0123d82d96 100644
--- a/packages/react-native-codegen/src/cli/combine/combine-js-to-schema.js
+++ b/packages/react-native-codegen/src/cli/combine/combine-js-to-schema.js
@@ -21,31 +21,69 @@ const path = require('path');
 const flowParser = new FlowParser();
 const typescriptParser = new TypeScriptParser();
 
-function combineSchemas(files: Array<string>): SchemaType {
-  return files.reduce(
-    (merged, filename) => {
-      const contents = fs.readFileSync(filename, 'utf8');
+function combineSchemas(
+  files: Array<string>,
+  excludeInterfaceOnly?: boolean,
+  excludeUnimplemented?: boolean,
+): {
+  interfaceOnly: SchemaType,
+  unimplemented: SchemaType,
+  everythingElse: SchemaType,
+} {
+  let interfaceOnly: SchemaType = {modules: {}};
+  let unimplemented: SchemaType = {modules: {}};
+  let everythingElse: SchemaType = {modules: {}};
 
-      if (
-        contents &&
-        (/export\s+default\s+\(?codegenNativeComponent</.test(contents) ||
-          /extends TurboModule/.test(contents))
-      ) {
-        const isTypeScript =
-          path.extname(filename) === '.ts' || path.extname(filename) === '.tsx';
+  files.forEach(filename => {
+    const contents = fs.readFileSync(filename, 'utf8');
 
-        const parser = isTypeScript ? typescriptParser : flowParser;
+    if (
+      contents &&
+      (/export\s+default\s+\(?codegenNativeComponent</.test(contents) ||
+        /extends TurboModule/.test(contents))
+    ) {
+      const isTypeScript =
+        path.extname(filename) === '.ts' || path.extname(filename) === '.tsx';
+      const parser = isTypeScript ? typescriptParser : flowParser;
+      const schema = parser.parseFile(filename);
 
-        const schema = parser.parseFile(filename);
+      if (!schema || !schema.modules) {
+        return;
+      }
+
+      const isInterfaceOnly = /interfaceOnly:\s*true/.test(contents);
+      const isUnimplemented =
+        /UnimplementedNativeViewNativeComponent\.js$/.test(filename);
 
-        if (schema && schema.modules) {
-          merged.modules = {...merged.modules, ...schema.modules};
+      if (isInterfaceOnly) {
+        if (excludeInterfaceOnly !== true) {
+          interfaceOnly = {
+            modules: {...interfaceOnly.modules, ...schema.modules},
+          };
+        } else {
+          console.log(`Excluding interfaceOnly component: ${filename}`);
+        }
+      } else if (isUnimplemented) {
+        if (excludeUnimplemented !== true) {
+          unimplemented = {
+            modules: {...unimplemented.modules, ...schema.modules},
+          };
+        } else {
+          console.log(`Excluding unimplemented component: ${filename}`);
         }
+      } else {
+        everythingElse = {
+          modules: {...everythingElse.modules, ...schema.modules},
+        };
       }
-      return merged;
-    },
-    {modules: {}},
-  );
+    }
+  });
+
+  return {
+    interfaceOnly,
+    unimplemented,
+    everythingElse,
+  };
 }
 
 function expandDirectoriesIntoFiles(
@@ -74,14 +112,28 @@ function combineSchemasInFileList(
   fileList: Array<string>,
   platform: ?string,
   exclude: ?RegExp,
-): SchemaType {
+  excludeInterfaceOnly: boolean,
+  excludeUnimplemented: boolean,
+): {
+  interfaceOnly: SchemaType,
+  unimplemented: SchemaType,
+  everythingElse: SchemaType,
+} {
   const expandedFileList = expandDirectoriesIntoFiles(
     fileList,
     platform,
     exclude,
   );
-  const combined = combineSchemas(expandedFileList);
-  if (Object.keys(combined.modules).length === 0) {
+  const combined = combineSchemas(
+    expandedFileList,
+    excludeInterfaceOnly,
+    excludeUnimplemented,
+  );
+  if (
+    Object.keys(combined.interfaceOnly.modules).length === 0 &&
+    Object.keys(combined.unimplemented.modules).length === 0 &&
+    Object.keys(combined.everythingElse.modules).length === 0
+  ) {
     console.error(
       'No modules to process in combine-js-to-schema-cli. If this is unexpected, please check if you set up your NativeComponent correctly. See combine-js-to-schema.js for how codegen finds modules.',
     );
@@ -94,9 +146,36 @@ function combineSchemasInFileListAndWriteToFile(
   platform: ?string,
   outfile: string,
   exclude: ?RegExp,
+  excludeInterfaceOnly: boolean,
+  excludeUnimplemented: boolean,
 ): void {
-  const combined = combineSchemasInFileList(fileList, platform, exclude);
-  const formattedSchema = JSON.stringify(combined);
+  const combined = combineSchemasInFileList(
+    fileList,
+    platform,
+    exclude,
+    excludeInterfaceOnly,
+    excludeUnimplemented,
+  );
+
+  // Determine which schema to write based on flags
+  let schemaToWrite;
+  if (excludeInterfaceOnly && excludeUnimplemented) {
+    schemaToWrite = combined.everythingElse;
+  } else if (excludeInterfaceOnly) {
+    schemaToWrite = combined.unimplemented;
+  } else if (excludeUnimplemented) {
+    schemaToWrite = combined.interfaceOnly;
+  } else {
+    // If no exclusions, combine all schemas
+    schemaToWrite = {
+      modules: {
+        ...combined.interfaceOnly.modules,
+        ...combined.unimplemented.modules,
+        ...combined.everythingElse.modules,
+      },
+    };
+  }
+  const formattedSchema = JSON.stringify(schemaToWrite);
   fs.writeFileSync(outfile, formattedSchema);
 }