From d0a101fbeaec0bdace3a680078e0acc8635b5c3e Mon Sep 17 00:00:00 2001
From: Shawn Dempsey <shawndempsey@meta.com>
Date: Thu, 27 Feb 2025 18:41:41 -0800
Subject: [PATCH] Add guard for custom module provider lookup in TMManager
 (#49738)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/49738

**Context**

- D70012142 added TM module provider support
- This was causing RN MacOS to silently fail to load any platform modules since it didn't implement the delegate method

Changelog:
[iOS][Fixed] - Add guard for custom module provider lookup in TMManager

Reviewed By: sbuggay

Differential Revision: D70357542

fbshipit-source-id: 5b338616655ecb84cdb3c60e243fdb99444af657
---
 .../ios/ReactCommon/RCTTurboModuleManager.mm  | 24 ++++++++++---------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/packages/react-native/ReactCommon/react/nativemodule/core/platform/ios/ReactCommon/RCTTurboModuleManager.mm b/packages/react-native/ReactCommon/react/nativemodule/core/platform/ios/ReactCommon/RCTTurboModuleManager.mm
index 290ce617af7..b784ba5942a 100644
--- a/packages/react-native/ReactCommon/react/nativemodule/core/platform/ios/ReactCommon/RCTTurboModuleManager.mm
+++ b/packages/react-native/ReactCommon/react/nativemodule/core/platform/ios/ReactCommon/RCTTurboModuleManager.mm
@@ -493,19 +493,21 @@ typedef struct {
 
 - (id<RCTModuleProvider>)_moduleProviderForName:(const char *)moduleName
 {
-  id<RCTModuleProvider> moduleProvider = [_delegate getModuleProvider:moduleName];
-  BOOL isTurboModule = [self _isTurboModule:moduleName];
-  if (RCTTurboModuleEnabled() && !isTurboModule && !moduleProvider) {
-    return nil;
-  }
+  if ([_delegate respondsToSelector:@selector(getModuleProvider:)]) {
+    id<RCTModuleProvider> moduleProvider = [_delegate getModuleProvider:moduleName];
+    BOOL isTurboModule = [self _isTurboModule:moduleName];
+    if (RCTTurboModuleEnabled() && !isTurboModule && !moduleProvider) {
+      return nil;
+    }
 
-  if (moduleProvider) {
-    if ([moduleProvider conformsToProtocol:@protocol(RCTTurboModule)]) {
-      // moduleProvider is also a TM, we need to initialize objectiveC properties, like the dispatch queue
-      return (id<RCTModuleProvider>)[self _provideObjCModule:moduleName moduleProvider:moduleProvider];
+    if (moduleProvider) {
+      if ([moduleProvider conformsToProtocol:@protocol(RCTTurboModule)]) {
+        // moduleProvider is also a TM, we need to initialize objectiveC properties, like the dispatch queue
+        return (id<RCTModuleProvider>)[self _provideObjCModule:moduleName moduleProvider:moduleProvider];
+      }
+      // module is Cxx module
+      return moduleProvider;
     }
-    // module is Cxx module
-    return moduleProvider;
   }
 
   // No module provider, the Module is registered without Codegen