introduce a private API for RCTHost to refresh its bundle url (facebook#37567)

Summary:
Pull Request resolved: facebook#37567

Changelog: [Internal]

in the situation where we want to refresh the bundle url due to developer mode, we add a private API that allows the host to refresh its bundle URL if needed. this private API will be called on cmd + R, which is the only case that supports the changing bundle URL in the middle of the app session.

Reviewed By: cipolleschi

Differential Revision: D45937856

fbshipit-source-id: 8661b5629985cc29479c34d8c80ee11e6b2ef025

Author: philIip

packages/react-native/ReactCommon/react/bridgeless/platform/ios/Core/RCTHost+Internal.h

@@ -7,8 +7,11 @@
 
 #import "RCTHost.h"
 
+typedef void (^RCTHostBundleURLProvider)(NSURL *bundleURL);
+
 @interface RCTHost (Internal)
 
 - (void)registerSegmentWithId:(NSNumber *)segmentId path:(NSString *)path;
+- (void)setBundleURLProvider:(RCTHostBundleURLProvider)bundleURLProvider;
 
 @end

packages/react-native/ReactCommon/react/bridgeless/platform/ios/Core/RCTHost.h

@@ -29,7 +29,6 @@ typedef std::shared_ptr<facebook::react::JSEngineInstance> (^RCTHostJSEngineProv
 
 @protocol RCTHostDelegate <NSObject>
 
-- (NSURL *)getBundleURL;
 - (std::shared_ptr<facebook::react::ContextContainer>)createContextContainer;
 
 - (void)host:(RCTHost *)host

packages/react-native/ReactCommon/react/bridgeless/platform/ios/Core/RCTHost.mm

@@ -30,6 +30,7 @@ @implementation RCTHost {
   NSURL *_oldDelegateBundleURL;
   NSURL *_bundleURL;
   RCTBundleManager *_bundleManager;
+  RCTHostBundleURLProvider _bundleURLProvider;
   facebook::react::ReactInstance::BindingsInstallFunc _bindingsInstallFunc;
   RCTHostJSEngineProvider _jsEngineProvider;
 
@@ -200,7 +201,9 @@ - (void)didReceiveReloadCommand
 {
   [_instance invalidate];
   _instance = nil;
-  [self _setBundleURL:[_hostDelegate getBundleURL]];
+  if (_bundleURLProvider) {
+    [self _setBundleURL:_bundleURLProvider()];
+  }
 
   // Ensure all attached surfaces are restarted after reload
   {
@@ -265,6 +268,11 @@ - (void)registerSegmentWithId:(NSNumber *)segmentId path:(NSString *)path
   [_instance registerSegmentWithId:segmentId path:path];
 }
 
+- (void)setBundleURLProvider:(RCTHostBundleURLProvider)bundleURLProvider
+{
+  _bundleURLProvider = [bundleURLProvider copy];
+}
+
 #pragma mark - Private
 
 - (void)_attachSurface:(RCTFabricSurface *)surface FB_OBJC_DIRECT

packages/react-native/ReactCommon/react/bridgeless/platform/ios/Core/RCTHostCreationHelpers.mm

@@ -13,8 +13,9 @@
     id<RCTTurboModuleManagerDelegate> turboModuleManagerDelegate,
     RCTHostJSEngineProvider jsEngineProvider)
 {
-  return [[RCTHost alloc] initWithHostDelegate:hostDelegate
-                    turboModuleManagerDelegate:turboModuleManagerDelegate
-                           bindingsInstallFunc:nullptr
-                              jsEngineProvider:jsEngineProvider];
+  return [[RCTHost alloc] initWithBundleURL:bundleURL
+                               hostDelegate:hostDelegate
+                 turboModuleManagerDelegate:turboModuleManagerDelegate
+                        bindingsInstallFunc:nullptr
+                           jsEngineProvider:jsEngineProvider];
 }