Remove private headers exposed by podspecs (microsoft#940)

Summary:
X-link: facebook/litho#940

X-link: facebook/yoga#1252

Pull Request resolved: facebook#36993

Fabric relies on the private C++ internals of Yoga. This creates a conundrum in the open source build due to how header creation in Cocoapods works.

1. The default mechanism of specifying public headers needs to include the private headers for them to be made usable by fabric (by default)
2. Cocoapods will roll up all of the public headers when importing a module

facebook#33381 fixed the Fabric Cocoapods build which ran into this. React Native relies on FlipperKit which relies on YogaKit, which in turn finally imports the Yoga podspec. Because YogaKit may use Swift, we can only expose the public Yoga C ABI.

The first solution in that PR was to allow RN to access Yoga private headers, but this was changed to instead make all Yoga headers public, and to add ifdefs to all of them to no-op when included outside of a C++ environment.

Talking to Kudo, we should be able to change back to the earlier approach in the PR, to instead expose the private headers to only RN. This lets us avoid exposing headers that we ideally wouldn't be, and lets us avoid the messy ifdefs in every Yoga header.

Changelog: [Internal]

Reviewed By: rshest

Differential Revision: D45139075

fbshipit-source-id: ad6c0b5b5a7aa5fbf849c3ca62f3fe330601b19a

Author: NickGerleman

packages/react-native/Libraries/AppDelegate/React-RCTAppDelegate.podspec

@@ -36,7 +36,8 @@ header_search_paths = [
   "$(PODS_ROOT)/RCT-Folly",
   "${PODS_ROOT}/Headers/Public/FlipperKit",
   "$(PODS_ROOT)/Headers/Public/ReactCommon",
-  "$(PODS_ROOT)/Headers/Public/React-RCTFabric"
+  "$(PODS_ROOT)/Headers/Public/React-RCTFabric",
+  "$(PODS_ROOT)/Headers/Private/Yoga",
 ].concat(use_hermes ? [
   "$(PODS_ROOT)/Headers/Public/React-hermes",
   "$(PODS_ROOT)/Headers/Public/hermes-engine"
@@ -54,7 +55,7 @@ Pod::Spec.new do |s|
   s.version                = version
   s.summary                = "An utility library to simplify common operations for the New Architecture"
   s.homepage               = "https://reactnative.dev/"
-  s.documentation_url      = "https://reactnative.dev/docs/actionsheetios"
+  s.documentation_url      = "https://reactnative.dev/"
   s.license                = package["license"]
   s.author                 = "Meta Platforms, Inc. and its affiliates"
   s.platforms              = { :ios => min_ios_version_supported }

packages/react-native/React/React-RCTFabric.podspec

@@ -27,6 +27,7 @@ header_search_paths = [
   "\"$(PODS_ROOT)/DoubleConversion\"",
   "\"$(PODS_ROOT)/RCT-Folly\"",
   "\"$(PODS_ROOT)/Headers/Private/React-Core\"",
+  "\"$(PODS_ROOT)/Headers/Private/Yoga\"",
   "\"$(PODS_ROOT)/Headers/Public/React-Codegen\"",
   "\"${PODS_CONFIGURATION_BUILD_DIR}/React-Codegen/React_Codegen.framework/Headers\"",
 

packages/react-native/ReactCommon/React-Fabric.podspec

@@ -82,6 +82,7 @@ Pod::Spec.new do |s|
       "\"$(PODS_ROOT)/boost\"",
       "\"$(PODS_TARGET_SRCROOT)/ReactCommon\"",
       "\"$(PODS_ROOT)/RCT-Folly\"",
+      "\"$(PODS_ROOT)/Headers/Private/Yoga\"",
     ]
 
     if ENV['USE_FRAMEWORKS']
@@ -220,7 +221,7 @@ Pod::Spec.new do |s|
       sss.source_files         = "react/renderer/components/view/**/*.{m,mm,cpp,h}"
       sss.exclude_files        = "react/renderer/components/view/tests"
       sss.header_dir           = "react/renderer/components/view"
-
+      sss.pod_target_xcconfig  = { "HEADER_SEARCH_PATHS" => "\"$(PODS_ROOT)/Headers/Private/Yoga\"" }
     end
   end
 

packages/react-native/ReactCommon/yoga/Yoga.podspec

@@ -51,7 +51,12 @@ Pod::Spec.new do |spec|
   source_files = File.join('ReactCommon/yoga', source_files) if ENV['INSTALL_YOGA_WITHOUT_PATH_OPTION']
   spec.source_files = source_files
 
-  header_files = 'yoga/*.h'
-  header_files = File.join('ReactCommon/yoga', header_files) if ENV['INSTALL_YOGA_WITHOUT_PATH_OPTION']
-  spec.public_header_files = header_files
+  public_header_files = 'yoga/{Yoga,YGEnums,YGMacros,YGValue}.h'
+  public_header_files = File.join('ReactCommon/yoga', public_header_files) if ENV['INSTALL_YOGA_WITHOUT_PATH_OPTION']
+  spec.public_header_files = public_header_files
+
+  # Fabric must be able to access private headers (which should not be included in the umbrella header)
+  all_header_files = 'yoga/**/*.h'
+  all_header_files = File.join('ReactCommon/yoga', all_header_files) if ENV['INSTALL_YOGA_WITHOUT_PATH_OPTION']
+  spec.private_header_files = Dir.glob(all_header_files) - Dir.glob(public_header_files)
 end

packages/react-native/ReactCommon/yoga/yoga/BitUtils.h

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#ifdef __cplusplus
-
 #include <cstdio>
 #include <cstdint>
 #include "YGEnums.h"
@@ -67,5 +65,3 @@ inline void setBooleanData(uint8_t& flags, size_t index, bool value) {
 } // namespace detail
 } // namespace yoga
 } // namespace facebook
-
-#endif

packages/react-native/ReactCommon/yoga/yoga/CompactValue.h

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#ifdef __cplusplus
-
 #if defined(__has_include) && __has_include(<version>)
 // needed to be able to evaluate defined(__cpp_lib_bit_cast)
 #include <version>
@@ -212,5 +210,3 @@ constexpr bool operator!=(CompactValue a, CompactValue b) noexcept {
 } // namespace detail
 } // namespace yoga
 } // namespace facebook
-
-#endif

packages/react-native/ReactCommon/yoga/yoga/Utils.h

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#ifdef __cplusplus
-
 #include "YGNode.h"
 #include "Yoga-internal.h"
 #include "CompactValue.h"
@@ -146,5 +144,3 @@ inline YGFloatOptional YGResolveValueMargin(
     const float ownerSize) {
   return value.isAuto() ? YGFloatOptional{0} : YGResolveValue(value, ownerSize);
 }
-
-#endif

packages/react-native/ReactCommon/yoga/yoga/YGConfig.h

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#ifdef __cplusplus
-
 #include "Yoga-internal.h"
 #include "Yoga.h"
 
@@ -77,5 +75,3 @@ struct YOGA_EXPORT YGConfig {
     setCloneNodeCallback(YGCloneNodeFunc{nullptr});
   }
 };
-
-#endif

packages/react-native/ReactCommon/yoga/yoga/YGFloatOptional.h

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#ifdef __cplusplus
-
 #include <cmath>
 #include <limits>
 #include "Yoga-internal.h"
@@ -70,5 +68,3 @@ inline bool operator>=(YGFloatOptional lhs, YGFloatOptional rhs) {
 inline bool operator<=(YGFloatOptional lhs, YGFloatOptional rhs) {
   return lhs < rhs || lhs == rhs;
 }
-
-#endif

packages/react-native/ReactCommon/yoga/yoga/YGLayout.h

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#ifdef __cplusplus
-
 #include "BitUtils.h"
 #include "YGFloatOptional.h"
 #include "Yoga-internal.h"
@@ -63,5 +61,3 @@ struct YGLayout {
   bool operator==(YGLayout layout) const;
   bool operator!=(YGLayout layout) const { return !(*this == layout); }
 };
-
-#endif