Exclude selectively disabled libraries from codegen generation (#51078)

Summary:
Selectively disabling autolinking of a native dependency with components registered in the codegen configuration in react-native.config.js causes builds to crash upon launch on iOS. This is because the generated `RCTThirdPartyComponentsProvider.mm` file contains references to the excluded library using `NSClassFromString` causing the returned NSDictionary from `+[RCTThirdPartyComponentsProvider thirdPartyFabricComponents]` to be populated with nil values and therefore crashing the app. This has been confirmed in 0.78.2 and 0.79.2 but probably exists in 0.77.x as well.

The issue has been further described in #51077.

[IOS][FIXED] - Skip codegen for selectively disabled libraries in react-native.config.js

Pull Request resolved: #51078

Test Plan:
1. Install a library that has the componentProvider field set in the codegen config (see reproducer) and install the iOS pods.
2. Build the app.
3. App should run successfully without any crashes.

Reviewed By: cortinico

Differential Revision: D74248371

Pulled By: cipolleschi

fbshipit-source-id: 1ff7b477ed3d94ca45616ae243d3d2d30bd897db

Author: fabriziocucci

packages/react-native/scripts/codegen/generate-artifacts-executor.js

@@ -324,22 +324,13 @@ function findExternalLibraries(pkgJson, projectRoot) {
   });
 }
 
-function findLibrariesFromReactNativeConfig(projectRoot) {
-  const rnConfigFileName = 'react-native.config.js';
-
+function findLibrariesFromReactNativeConfig(projectRoot, rnConfig) {
   codegenLog(
-    `Searching for codegen-enabled libraries in ${rnConfigFileName}`,
+    `Searching for codegen-enabled libraries in react-native.config.js`,
     true,
   );
 
-  const rnConfigFilePath = path.resolve(projectRoot, rnConfigFileName);
-
-  if (!fs.existsSync(rnConfigFilePath)) {
-    return [];
-  }
-  const rnConfig = require(rnConfigFilePath);
-
-  if (rnConfig.dependencies == null) {
+  if (!rnConfig.dependencies) {
     return [];
   }
   return Object.keys(rnConfig.dependencies).flatMap(name => {
@@ -591,15 +582,15 @@ function mustGenerateNativeCode(includeLibraryPath, schemaInfo) {
   );
 }
 
-function findCodegenEnabledLibraries(pkgJson, projectRoot) {
+function findCodegenEnabledLibraries(pkgJson, projectRoot, reactNativeConfig) {
   const projectLibraries = findProjectRootLibraries(pkgJson, projectRoot);
   if (pkgJsonIncludesGeneratedCode(pkgJson)) {
     return projectLibraries;
   } else {
     return [
       ...projectLibraries,
       ...findExternalLibraries(pkgJson, projectRoot),
-      ...findLibrariesFromReactNativeConfig(projectRoot),
+      ...findLibrariesFromReactNativeConfig(projectRoot, reactNativeConfig),
     ];
   }
 }
@@ -924,9 +915,14 @@ function execute(projectRoot, targetPlatform, baseOutputPath, source) {
 
     buildCodegenIfNeeded();
 
-    const libraries = findCodegenEnabledLibraries(pkgJson, projectRoot);
+    const reactNativeConfig = readReactNativeConfig(projectRoot);
+    const codegenEnabledLibraries = findCodegenEnabledLibraries(
+      pkgJson,
+      projectRoot,
+      reactNativeConfig,
+    );
 
-    if (libraries.length === 0) {
+    if (codegenEnabledLibraries.length === 0) {
       codegenLog('No codegen-enabled libraries found.', true);
       return;
     }
@@ -935,6 +931,18 @@ function execute(projectRoot, targetPlatform, baseOutputPath, source) {
       targetPlatform === 'all' ? supportedPlatforms : [targetPlatform];
 
     for (const platform of platforms) {
+      const disabledLibraries = findDisabledLibrariesByPlatform(
+        reactNativeConfig,
+        platform,
+      );
+      const libraries = codegenEnabledLibraries.filter(
+        ({name}) => !disabledLibraries.includes(name),
+      );
+
+      if (!libraries.length) {
+        continue;
+      }
+
       const outputPath = computeOutputPath(
         projectRoot,
         baseOutputPath,
@@ -970,6 +978,29 @@ function execute(projectRoot, targetPlatform, baseOutputPath, source) {
   return;
 }
 
+/**
+ * Finds all disabled libraries by platform based the react native config.
+ *
+ * This is needed when selectively disabling libraries in react-native.config.js since codegen should exclude those libraries as well.
+ */
+function findDisabledLibrariesByPlatform(reactNativeConfig, platform) {
+  const dependencies = reactNativeConfig.dependencies ?? {};
+
+  return Object.keys(dependencies).filter(
+    dependency => dependencies[dependency].platforms?.[platform] === null,
+  );
+}
+
+function readReactNativeConfig(projectRoot) {
+  const rnConfigFilePath = path.resolve(projectRoot, 'react-native.config.js');
+
+  if (!fs.existsSync(rnConfigFilePath)) {
+    return {};
+  }
+
+  return require(rnConfigFilePath);
+}
+
 module.exports = {
   execute,
   generateRNCoreComponentsIOS,