feat(iOS): early TurboModule discovery

packages/react-native/Libraries/AppDelegate/RCTDefaultReactNativeFactoryDelegate.h

@@ -16,6 +16,9 @@ NS_ASSUME_NONNULL_BEGIN
  */
 
 @interface RCTDefaultReactNativeFactoryDelegate : UIResponder <RCTReactNativeFactoryDelegate>
+
+- (nonnull NSArray<NSString *> *)getModuleNames;
+
 @end
 
 NS_ASSUME_NONNULL_END

packages/react-native/Libraries/AppDelegate/RCTDefaultReactNativeFactoryDelegate.mm

@@ -129,6 +129,13 @@ - (Class)getModuleClassFromName:(const char *)name
   return nullptr;
 }
 
+- (nonnull NSArray<NSString *> *)getModuleNames{
+  if([dependencyProvider respondsToSelector:@selector(moduleNames)]) {
+    return [dependencyProvider moduleNames];
+  }
+  return @[]; 
+}
+
 - (id<RCTTurboModule>)getModuleInstanceFromClass:(Class)moduleClass
 {
   return nullptr;

packages/react-native/Libraries/AppDelegate/RCTDependencyProvider.h

@@ -26,6 +26,9 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (nonnull NSDictionary<NSString *, id<RCTModuleProvider>> *)moduleProviders;
 
+@optional
+- (nonnull NSArray<NSString *> *)moduleNames;
+
 @end
 
 NS_ASSUME_NONNULL_END

packages/react-native/Libraries/AppDelegate/RCTReactNativeFactory.mm

@@ -141,6 +141,13 @@ - (BOOL)bridgelessEnabled
 
 #pragma mark - RCTTurboModuleManagerDelegate
 
+- (nonnull NSArray<NSString *> *)getModuleNames{
+  if ([_delegate respondsToSelector:@selector(getModuleNames)]) {
+    return [_delegate getModuleNames];
+  }
+  return @[];
+}
+
 - (Class)getModuleClassFromName:(const char *)name
 {
 #if RN_DISABLE_OSS_PLUGIN_HEADER

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlags.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<2294f3350aca0f19862f8cfdbe9479b6>>
+ * @generated SignedSource<<7c5701ed1e7ddafa497364e72afbbbe2>>
  */
 
 /**
@@ -318,6 +318,12 @@ public object ReactNativeFeatureFlags {
   @JvmStatic
   public fun hideOffscreenVirtualViewsOnIOS(): Boolean = accessor.hideOffscreenVirtualViewsOnIOS()
 
+  /**
+   * Enables creating Module Holders for TurboModules before the JS Runtime is started, iOS only. Android already creates them early.
+   */
+  @JvmStatic
+  public fun iosEarlyTurboModuleDiscovery(): Boolean = accessor.iosEarlyTurboModuleDiscovery()
+
   /**
    * Enable the V2 in-app Performance Monitor. This flag is global and should not be changed across React Host lifetimes.
    */

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<9f50b2fc5f4aad27e6cd8ecbde3d791a>>
+ * @generated SignedSource<<4e4dc5cc02194f3c632c49bb11f50be5>>
  */
 
 /**
@@ -68,6 +68,7 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
   private var fuseboxEnabledReleaseCache: Boolean? = null
   private var fuseboxNetworkInspectionEnabledCache: Boolean? = null
   private var hideOffscreenVirtualViewsOnIOSCache: Boolean? = null
+  private var iosEarlyTurboModuleDiscoveryCache: Boolean? = null
   private var perfMonitorV2EnabledCache: Boolean? = null
   private var preparedTextCacheSizeCache: Double? = null
   private var preventShadowTreeCommitExhaustionCache: Boolean? = null
@@ -521,6 +522,15 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
     return cached
   }
 
+  override fun iosEarlyTurboModuleDiscovery(): Boolean {
+    var cached = iosEarlyTurboModuleDiscoveryCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.iosEarlyTurboModuleDiscovery()
+      iosEarlyTurboModuleDiscoveryCache = cached
+    }
+    return cached
+  }
+
   override fun perfMonitorV2Enabled(): Boolean {
     var cached = perfMonitorV2EnabledCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxInterop.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<27b8c102b60eadcf284fd3c156a037aa>>
+ * @generated SignedSource<<62beb45b5693fbdc4ff6b64e7f9b8898>>
  */
 
 /**
@@ -124,6 +124,8 @@ public object ReactNativeFeatureFlagsCxxInterop {
 
   @DoNotStrip @JvmStatic public external fun hideOffscreenVirtualViewsOnIOS(): Boolean
 
+  @DoNotStrip @JvmStatic public external fun iosEarlyTurboModuleDiscovery(): Boolean
+
   @DoNotStrip @JvmStatic public external fun perfMonitorV2Enabled(): Boolean
 
   @DoNotStrip @JvmStatic public external fun preparedTextCacheSize(): Double

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<9583365cd9d7786ee9be03ff34b0766f>>
+ * @generated SignedSource<<47f42b3f088e12eb24ad4343d8275d55>>
  */
 
 /**
@@ -119,6 +119,8 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi
 
   override fun hideOffscreenVirtualViewsOnIOS(): Boolean = false
 
+  override fun iosEarlyTurboModuleDiscovery(): Boolean = false
+
   override fun perfMonitorV2Enabled(): Boolean = false
 
   override fun preparedTextCacheSize(): Double = 200.0

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsLocalAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<8bcbcc20f92faf4c50c093fac701dfa2>>
+ * @generated SignedSource<<c941c56448131920f87162a281442a5c>>
  */
 
 /**
@@ -72,6 +72,7 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
   private var fuseboxEnabledReleaseCache: Boolean? = null
   private var fuseboxNetworkInspectionEnabledCache: Boolean? = null
   private var hideOffscreenVirtualViewsOnIOSCache: Boolean? = null
+  private var iosEarlyTurboModuleDiscoveryCache: Boolean? = null
   private var perfMonitorV2EnabledCache: Boolean? = null
   private var preparedTextCacheSizeCache: Double? = null
   private var preventShadowTreeCommitExhaustionCache: Boolean? = null
@@ -573,6 +574,16 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
     return cached
   }
 
+  override fun iosEarlyTurboModuleDiscovery(): Boolean {
+    var cached = iosEarlyTurboModuleDiscoveryCache
+    if (cached == null) {
+      cached = currentProvider.iosEarlyTurboModuleDiscovery()
+      accessedFeatureFlags.add("iosEarlyTurboModuleDiscovery")
+      iosEarlyTurboModuleDiscoveryCache = cached
+    }
+    return cached
+  }
+
   override fun perfMonitorV2Enabled(): Boolean {
     var cached = perfMonitorV2EnabledCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<8a2403250a16c2b2b573fc05db6e4768>>
+ * @generated SignedSource<<db29e34cc63e19acccd6e9e07a44b3d8>>
  */
 
 /**
@@ -119,6 +119,8 @@ public interface ReactNativeFeatureFlagsProvider {
 
   @DoNotStrip public fun hideOffscreenVirtualViewsOnIOS(): Boolean
 
+  @DoNotStrip public fun iosEarlyTurboModuleDiscovery(): Boolean
+
   @DoNotStrip public fun perfMonitorV2Enabled(): Boolean
 
   @DoNotStrip public fun preparedTextCacheSize(): Double

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<72694e8b935e15e4b826a0174fd0c23f>>
+ * @generated SignedSource<<14a636939fc8f8030580ae7eb91a68b2>>
  */
 
 /**
@@ -327,6 +327,12 @@ class ReactNativeFeatureFlagsJavaProvider
     return method(javaProvider_);
   }
 
+  bool iosEarlyTurboModuleDiscovery() override {
+    static const auto method =
+        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("iosEarlyTurboModuleDiscovery");
+    return method(javaProvider_);
+  }
+
   bool perfMonitorV2Enabled() override {
     static const auto method =
         getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("perfMonitorV2Enabled");
@@ -691,6 +697,11 @@ bool JReactNativeFeatureFlagsCxxInterop::hideOffscreenVirtualViewsOnIOS(
   return ReactNativeFeatureFlags::hideOffscreenVirtualViewsOnIOS();
 }
 
+bool JReactNativeFeatureFlagsCxxInterop::iosEarlyTurboModuleDiscovery(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::iosEarlyTurboModuleDiscovery();
+}
+
 bool JReactNativeFeatureFlagsCxxInterop::perfMonitorV2Enabled(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
   return ReactNativeFeatureFlags::perfMonitorV2Enabled();
@@ -966,6 +977,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
       makeNativeMethod(
         "hideOffscreenVirtualViewsOnIOS",
         JReactNativeFeatureFlagsCxxInterop::hideOffscreenVirtualViewsOnIOS),
+      makeNativeMethod(
+        "iosEarlyTurboModuleDiscovery",
+        JReactNativeFeatureFlagsCxxInterop::iosEarlyTurboModuleDiscovery),
       makeNativeMethod(
         "perfMonitorV2Enabled",
         JReactNativeFeatureFlagsCxxInterop::perfMonitorV2Enabled),

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<90f0583b9d527a1291431a8318f10356>>
+ * @generated SignedSource<<8eb2ab1bec309868f89e24ad99ad14f0>>
  */
 
 /**
@@ -174,6 +174,9 @@ class JReactNativeFeatureFlagsCxxInterop
   static bool hideOffscreenVirtualViewsOnIOS(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 
+  static bool iosEarlyTurboModuleDiscovery(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
   static bool perfMonitorV2Enabled(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<6ff8aafa0de2f6c5cf8b42e0d43302e9>>
+ * @generated SignedSource<<36d94f6f70fde06dd23ca68804d99181>>
  */
 
 /**
@@ -218,6 +218,10 @@ bool ReactNativeFeatureFlags::hideOffscreenVirtualViewsOnIOS() {
   return getAccessor().hideOffscreenVirtualViewsOnIOS();
 }
 
+bool ReactNativeFeatureFlags::iosEarlyTurboModuleDiscovery() {
+  return getAccessor().iosEarlyTurboModuleDiscovery();
+}
+
 bool ReactNativeFeatureFlags::perfMonitorV2Enabled() {
   return getAccessor().perfMonitorV2Enabled();
 }

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<de9db1b4e8ad4d4a81368613a7d1cfb2>>
+ * @generated SignedSource<<a17777271d96555d577c8d9dca867918>>
  */
 
 /**
@@ -279,6 +279,11 @@ class ReactNativeFeatureFlags {
    */
   RN_EXPORT static bool hideOffscreenVirtualViewsOnIOS();
 
+  /**
+   * Enables creating Module Holders for TurboModules before the JS Runtime is started, iOS only. Android already creates them early.
+   */
+  RN_EXPORT static bool iosEarlyTurboModuleDiscovery();
+
   /**
    * Enable the V2 in-app Performance Monitor. This flag is global and should not be changed across React Host lifetimes.
    */