Use autolinking react-native-config output in iOS artifacts generator (#53503)

Summary:
Resolves #53501

This is a pretty major oversight of (presumably) the old autolinking refactor. The iOS autolinking's second stage, invoked in `use_react_native!` does not accept the `react-native-config` sub-command's `react-native-config` output. This is only invoked and used in the prior step, `use_native_modules`.

The second step instead invokes old code that does something _similar_ to the new autolinking in `scripts/generate-artifacts-executor`, and happens to align in most cases. (But it does "autolinking" from scratch). tl;dr: When the results don't match up, things go wrong.

Instead, we now write the autolinking (react native config) results to a file, then read the output back in the second step.

This doesn't affect Android/Gradle, which are implemented correctly.

[IOS] [FIXED] - Use autolinking-generated react-native-config output in second step of cocoapods linking that generates artifacts and generated source

Pull Request resolved: #53503

Test Plan:
- See #53501 for failing repro
- Clone for working repro: https://github.com/byCedric/react-native-codegen-ios-autolinking/tree/fix-54503
  - Note: Contains this PR's changes as a patch
  - `bun install`
  - `bun expo run:ios`

Reviewed By: cortinico

Differential Revision: D81490755

Pulled By: cipolleschi

fbshipit-source-id: eefe786a116404f4ed24bd7125dfb108a811f71e

Author: kitten

packages/react-native/scripts/cocoapods/autolinking.rb

@@ -40,6 +40,12 @@ def list_native_modules!(config_command)
   packages = config["dependencies"]
   ios_project_root = Pathname.new(config["project"]["ios"]["sourceDir"])
   react_native_path = Pathname.new(config["reactNativePath"])
+  codegen_output_path = ios_project_root.join("build/generated/autolinking/autolinking.json")
+
+  # Write autolinking react-native-config output to codegen folder
+  FileUtils.mkdir_p(File.dirname(codegen_output_path))
+  File.write(codegen_output_path, json)
+
   found_pods = []
 
   packages.each do |package_name, package|

packages/react-native/scripts/cocoapods/codegen_utils.rb

@@ -87,7 +87,7 @@ def self.clean_up_build_folder(rn_path, codegen_dir, dir_manager: Dir, file_mana
       codegen_path = file_manager.join(ios_folder, codegen_dir)
       return if !dir_manager.exist?(codegen_path)
 
-      FileUtils.rm_rf(dir_manager.glob("#{codegen_path}/*"))
+      FileUtils.rm_rf("#{codegen_path}")
       base_provider_path = file_manager.join(rn_path, 'React', 'Fabric', 'RCTThirdPartyFabricComponentsProvider')
       FileUtils.rm_rf("#{base_provider_path}.h")
       FileUtils.rm_rf("#{base_provider_path}.mm")

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

@@ -86,10 +86,14 @@ function execute(
       buildCodegenIfNeeded();
     }
 
-    const reactNativeConfig = readReactNativeConfig(projectRoot);
+    const reactNativeConfig = readReactNativeConfig(
+      projectRoot,
+      baseOutputPath,
+    );
     const codegenEnabledLibraries = findCodegenEnabledLibraries(
       pkgJson,
       projectRoot,
+      baseOutputPath,
       reactNativeConfig,
     );
 

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

@@ -97,15 +97,40 @@ function cleanupEmptyFilesAndFolders(filepath /*: string */) {
   }
 }
 
-function readReactNativeConfig(projectRoot /*: string */) /*: $FlowFixMe */ {
-  const rnConfigFilePath = path.resolve(projectRoot, 'react-native.config.js');
+function readGeneratedAutolinkingOutput(
+  baseOutputPath /*: string */,
+) /*: $FlowFixMe */ {
+  // NOTE: Generated by scripts/cocoapods/autolinking.rb in list_native_modules (called by use_native_modules)
+  const autolinkingGeneratedPath = path.resolve(
+    baseOutputPath,
+    'build/generated/autolinking/autolinking.json',
+  );
+  if (fs.existsSync(autolinkingGeneratedPath)) {
+    // $FlowFixMe[unsupported-syntax]
+    return require(autolinkingGeneratedPath);
+  } else {
+    codegenLog(
+      `Could not find generated autolinking output at: ${autolinkingGeneratedPath}`,
+    );
+    return null;
+  }
+}
 
-  if (!fs.existsSync(rnConfigFilePath)) {
+function readReactNativeConfig(
+  projectRoot /*: string */,
+  baseOutputPath /*: string */,
+) /*: $FlowFixMe */ {
+  const autolinkingOutput = readGeneratedAutolinkingOutput(baseOutputPath);
+  const rnConfigFilePath = path.resolve(projectRoot, 'react-native.config.js');
+  if (autolinkingOutput) {
+    return autolinkingOutput;
+  } else if (fs.existsSync(rnConfigFilePath)) {
+    // $FlowIgnore[unsupported-syntax]
+    return require(rnConfigFilePath);
+  } else {
+    codegenLog(`Could not find React Native config at: ${rnConfigFilePath}`);
     return {};
   }
-
-  // $FlowIgnore[unsupported-syntax]
-  return require(rnConfigFilePath);
 }
 
 /**
@@ -114,17 +139,23 @@ function readReactNativeConfig(projectRoot /*: string */) /*: $FlowFixMe */ {
 function findCodegenEnabledLibraries(
   pkgJson /*: $FlowFixMe */,
   projectRoot /*: string */,
+  baseOutputPath /*: string */,
   reactNativeConfig /*: $FlowFixMe */,
 ) /*: Array<$FlowFixMe> */ {
   const projectLibraries = findProjectRootLibraries(pkgJson, projectRoot);
   if (pkgJsonIncludesGeneratedCode(pkgJson)) {
     return projectLibraries;
   } else {
-    return [
-      ...projectLibraries,
-      ...findExternalLibraries(pkgJson, projectRoot),
+    const libraries = [...projectLibraries];
+    // If we ran autolinking, we shouldn't try to run our own "autolinking-like"
+    // library discovery
+    if (!readGeneratedAutolinkingOutput(baseOutputPath)) {
+      libraries.push(...findExternalLibraries(pkgJson, projectRoot));
+    }
+    libraries.push(
       ...findLibrariesFromReactNativeConfig(projectRoot, reactNativeConfig),
-    ];
+    );
+    return libraries;
   }
 }