Mac Catalyst patches (#34026)

Summary:
This PR adds a new method called **__apply_mac_catalyst_patches** to **scripts/react_native_pods.rb**. If it is enabled in the Podfile, it will apply three patches necessary for successful building not only for iOS and tvOS targets, but also for macOS using Apple's Mac Catalyst technology.

These 3 patches are:
- Fixing bundle signing issues by altering CODE_SIGN_IDENTITY
- Explicitly setting dead code stripping flag in project.pbxproj
- Modifying library search paths

The details were discussed here reactwg/react-native-releases#21 (comment)

## Changelog

[iOS] [Added] - Add Mac Catalyst compatibility (can be enabled in Podfile)

Pull Request resolved: #34026

Test Plan:
1. Go to project settings in Xcode, to General tab. Enable "iPad" and "Mac Catalyst" checkboxes
2. Go to "Signing & Capabilities" tab, ensure that a correct bundle id and development team are set
3. Edit Podfile, uncomment **__apply_mac_catalyst_patches(installer)** line
4. Run `pod install` in ios directory
5. Get back to Xcode, select "My Mac (Mac Catalyst)" as a target device
6. Build & run

Reviewed By: cipolleschi

Differential Revision: D37362054

Pulled By: cortinico

fbshipit-source-id: 74636f716f112289ab40968bbc8e52406c1e9579

Author: Arkkeeper

packages/rn-tester/Podfile

@@ -21,6 +21,7 @@ def pods(options = {}, use_flipper: false)
   project 'RNTesterPods.xcodeproj'
 
   fabric_enabled = true
+
   # Hermes is now enabled by default.
   # The following line will only disable Hermes if the USE_HERMES envvar is SET to a value other than 1 (e.g. USE_HERMES=0).
   hermes_enabled = !ENV.has_key?('USE_HERMES') || ENV['USE_HERMES'] == '1'
@@ -66,6 +67,6 @@ target 'RNTesterIntegrationTests' do
 end
 
 post_install do |installer|
-  react_native_post_install(installer, @prefix_path)
+  react_native_post_install(installer, @prefix_path, :mac_catalyst_enabled => false)
   __apply_Xcode_12_5_M1_post_install_workaround(installer)
 end

scripts/cocoapods/__tests__/test_utils/InstallerMock.rb

@@ -138,12 +138,16 @@ def save_as(file_path)
 class TargetMock
     attr_reader :name
     attr_reader :build_configurations
+    attr_reader :product_type
 
     attr_reader :received_resolved_build_setting_parameters
 
-    def initialize(name, build_configurations = [])
+    def initialize(name, build_configurations = [], product_type = nil)
         @name = name
         @build_configurations = build_configurations
+        unless product_type.nil?
+          @product_type = product_type
+        end
         @received_resolved_build_setting_parameters = []
     end
 

scripts/cocoapods/__tests__/utils-test.rb

@@ -266,20 +266,20 @@ def test_fixLibrarySearchPath_whenThereAreSearchPathsAndNoSwift_removesSwift5_5A
     # ============================== #
 
     def test_fixLibrarySearchPaths_correctlySetsTheSearchPathsForAllProjects
-        firstTarget = prepare_target("FirstTarget")
-        secondTarget = prepare_target("SecondTarget")
-        thirdTarget = prepare_target("ThirdTarget")
+        first_target = prepare_target("FirstTarget")
+        second_target = prepare_target("SecondTarget")
+        third_target = prepare_target("ThirdTarget")
         user_project_mock = UserProjectMock.new("a/path", [
                 prepare_config("Debug"),
                 prepare_config("Release"),
             ],
             :native_targets => [
-                firstTarget,
-                secondTarget
+                first_target,
+                second_target
             ]
         )
         pods_projects_mock = PodsProjectMock.new([], {"hermes-engine" => {}}, :native_targets => [
-            thirdTarget
+            third_target
         ])
         installer = InstallerMock.new(pods_projects_mock, [
             AggregatedProjectMock.new(user_project_mock)
@@ -315,6 +315,55 @@ def test_fixLibrarySearchPaths_correctlySetsTheSearchPathsForAllProjects
         assert_equal(pods_projects_mock.save_invocation_count, 1)
     end
 
+    # ================================= #
+    # Test - Apply Mac Catalyst Patches #
+    # ================================= #
+
+    def test_applyMacCatalystPatches_correctlyAppliesNecessaryPatches
+        first_target = prepare_target("FirstTarget")
+        second_target = prepare_target("SecondTarget")
+        third_target = prepare_target("ThirdTarget", "com.apple.product-type.bundle")
+        user_project_mock = UserProjectMock.new("a/path", [
+                prepare_config("Debug"),
+                prepare_config("Release"),
+            ],
+            :native_targets => [
+                first_target,
+                second_target
+            ]
+        )
+        pods_projects_mock = PodsProjectMock.new([third_target], {"hermes-engine" => {}}, :native_targets => [])
+        installer = InstallerMock.new(pods_projects_mock, [
+            AggregatedProjectMock.new(user_project_mock)
+        ])
+
+        # Act
+        ReactNativePodsUtils.apply_mac_catalyst_patches(installer)
+
+        # Assert
+        first_target.build_configurations.each do |config|
+          assert_nil(config.build_settings["CODE_SIGN_IDENTITY[sdk=macosx*]"])
+        end
+
+        second_target.build_configurations.each do |config|
+          assert_nil(config.build_settings["CODE_SIGN_IDENTITY[sdk=macosx*]"])
+        end
+
+        third_target.build_configurations.each do |config|
+          assert_equal(config.build_settings["CODE_SIGN_IDENTITY[sdk=macosx*]"], "-")
+        end
+        
+        user_project_mock.native_targets.each do |target|
+            target.build_configurations.each do |config|
+                assert_equal(config.build_settings["DEAD_CODE_STRIPPING"], "YES")
+                assert_equal(config.build_settings["PRESERVE_DEAD_CODE_INITS_AND_TERMS"], "YES")
+                assert_equal(config.build_settings["LIBRARY_SEARCH_PATHS"], ["$(SDKROOT)/usr/lib/swift", "$(SDKROOT)/System/iOSSupport/usr/lib/swift", "$(inherited)"])
+            end
+        end
+
+        assert_equal(user_project_mock.save_invocation_count, 1)
+    end
+
     # ==================================== #
     # Test - Set Node_Modules User Setting #
     # ==================================== #
@@ -357,9 +406,9 @@ def prepare_config(config_name)
     ]})
 end
 
-def prepare_target(name)
-    return TargetMock.new(name, [
-        prepare_config("Debug"),
-        prepare_config("Release")
-    ])
+def prepare_target(name, product_type = nil)
+  return TargetMock.new(name, [
+      prepare_config("Debug"),
+      prepare_config("Release")
+  ], product_type)
 end

scripts/cocoapods/utils.rb

@@ -93,6 +93,30 @@ def self.fix_library_search_paths(installer)
         end
     end
 
+    def self.apply_mac_catalyst_patches(installer)
+        # Fix bundle signing issues
+        installer.pods_project.targets.each do |target|
+            if target.respond_to?(:product_type) and target.product_type == "com.apple.product-type.bundle"
+                target.build_configurations.each do |config|
+                    config.build_settings['CODE_SIGN_IDENTITY[sdk=macosx*]'] = '-'
+                end
+            end
+        end
+
+        installer.aggregate_targets.each do |aggregate_target|
+            aggregate_target.user_project.native_targets.each do |target|
+                target.build_configurations.each do |config|
+                    # Explicitly set dead code stripping flags
+                    config.build_settings['DEAD_CODE_STRIPPING'] = 'YES'
+                    config.build_settings['PRESERVE_DEAD_CODE_INITS_AND_TERMS'] = 'YES'
+                    # Modify library search paths
+                    config.build_settings['LIBRARY_SEARCH_PATHS'] = ['$(SDKROOT)/usr/lib/swift', '$(SDKROOT)/System/iOSSupport/usr/lib/swift', '$(inherited)']
+                end
+            end
+            aggregate_target.user_project.save()
+        end
+    end
+
     private
 
     def self.fix_library_search_path(config)

scripts/react_native_pods.rb

@@ -141,7 +141,9 @@ def use_flipper!(versions = {}, configurations: ['Debug'])
   use_flipper_pods(versions, :configurations => configurations)
 end
 
-def react_native_post_install(installer, react_native_path = "../node_modules/react-native")
+def react_native_post_install(installer, react_native_path = "../node_modules/react-native", mac_catalyst_enabled: false)
+  ReactNativePodsUtils.apply_mac_catalyst_patches(installer) if mac_catalyst_enabled
+
   if ReactNativePodsUtils.has_pod(installer, 'Flipper')
     flipper_post_install(installer)
   end

template/ios/Podfile

@@ -32,7 +32,12 @@ target 'HelloWorld' do
   end
 
   post_install do |installer|
-    react_native_post_install(installer)
+    react_native_post_install(
+      installer,
+      # Set `mac_catalyst_enabled` to `true` in order to apply patches
+      # necessary for Mac Catalyst builds
+      :mac_catalyst_enabled => false
+    )
     __apply_Xcode_12_5_M1_post_install_workaround(installer)
   end
 end