Automatically detect when use frameworks is used (#35636)

Summary:
This PR introduce an automatic way to detect whether the user sets its podfile to use frameworks.
In this way, users don't have to install pods with a specific environment flag but they can rely on the standard Cocoapods usage

## Changelog

[IOS][ADDED] - Automatically detect whether use_frameworks! is used

Pull Request resolved: https://github.com/facebook/react-native/pull/35636

Test Plan:
- CircleCI is Green
- Added unit tests
- Tested locally with an app

Reviewed By: dmytrorykun

Differential Revision: D42029355

Pulled By: cipolleschi

fbshipit-source-id: 76c92133deabbda59603b043a4d542737f10f044

scripts/cocoapods/__tests__/test_utils/TargetDefinitionMock.rb

@@ -0,0 +1,12 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+class TargetDefinitionMock
+    attr_reader :build_type
+
+    def initialize(build_type)
+        @build_type = build_type
+    end
+end

scripts/cocoapods/__tests__/utils-test.rb

@@ -13,6 +13,7 @@ require_relative "./test_utils/SysctlCheckerMock.rb"
 require_relative "./test_utils/FileMock.rb"
 require_relative "./test_utils/systemUtils.rb"
 require_relative "./test_utils/PathnameMock.rb"
+require_relative "./test_utils/TargetDefinitionMock.rb"
 
 class UtilsTests < Test::Unit::TestCase
     def setup
@@ -30,6 +31,7 @@ class UtilsTests < Test::Unit::TestCase
         Environment.reset()
         ENV['RCT_NEW_ARCH_ENABLED'] = '0'
         ENV['USE_HERMES'] = '1'
+        ENV['USE_FRAMEWORKS'] = nil
         system_reset_commands
     end
 
@@ -481,6 +483,57 @@ class UtilsTests < Test::Unit::TestCase
         assert_equal(File.exist_invocation_params, ["/.xcode.env"])
         assert_equal($collected_commands, ["echo 'export NODE_BINARY=$(command -v node)' > /.xcode.env"])
     end
+
+    # ============================ #
+    # Test - Detect Use Frameworks #
+    # ============================ #
+    def test_detectUseFrameworks_whenEnvAlreadySet_DoesNothing
+        # Arrange
+        ENV['USE_FRAMEWORKS'] = 'static'
+        target_definition = TargetDefinitionMock.new('something')
+
+        # Act
+        ReactNativePodsUtils.detect_use_frameworks(target_definition)
+
+        # Assert
+        assert_equal(Pod::UI.collected_messages, [])
+    end
+
+    def test_detectUseFrameworks_whenEnvNotSetAndNotUsed_setEnvVarToNil
+        # Arrange
+        target_definition = TargetDefinitionMock.new('static library')
+
+        # Act
+        ReactNativePodsUtils.detect_use_frameworks(target_definition)
+
+        # Assert
+        assert_equal(Pod::UI.collected_messages, ["Framework build type is static library"])
+        assert_nil(ENV['USE_FRAMEWORKS'])
+    end
+
+    def test_detectUseFrameworks_whenEnvNotSetAndStaticFrameworks_setEnvVarToStatic
+        # Arrange
+        target_definition = TargetDefinitionMock.new('static framework')
+
+        # Act
+        ReactNativePodsUtils.detect_use_frameworks(target_definition)
+
+        # Assert
+        assert_equal(Pod::UI.collected_messages, ["Framework build type is static framework"])
+        assert_equal(ENV['USE_FRAMEWORKS'], 'static')
+    end
+
+    def test_detectUseFrameworks_whenEnvNotSetAndDynamicFrameworks_setEnvVarToDynamic
+        # Arrange
+        target_definition = TargetDefinitionMock.new('dynamic framework')
+
+        # Act
+        ReactNativePodsUtils.detect_use_frameworks(target_definition)
+
+        # Assert
+        assert_equal(Pod::UI.collected_messages, ["Framework build type is dynamic framework"])
+        assert_equal(ENV['USE_FRAMEWORKS'], 'dynamic')
+    end
 end
 
 def prepare_empty_user_project_mock

scripts/cocoapods/utils.rb

@@ -163,4 +163,26 @@ class ReactNativePodsUtils
 
         system("echo 'export NODE_BINARY=$(command -v node)' > #{file_path}")
     end
+
+    # It examines the target_definition property and sets the appropriate value for
+    # ENV['USE_FRAMEWORKS'] variable.
+    #
+    # - parameter target_definition: The current target definition
+    def self.detect_use_frameworks(target_definition)
+        if ENV['USE_FRAMEWORKS'] != nil
+            return
+        end
+
+        framework_build_type = target_definition.build_type.to_s
+
+        Pod::UI.puts("Framework build type is #{framework_build_type}")
+
+        if framework_build_type === "static framework"
+            ENV['USE_FRAMEWORKS'] = 'static'
+        elsif framework_build_type === "dynamic framework"
+            ENV['USE_FRAMEWORKS'] = 'dynamic'
+        else
+            ENV['USE_FRAMEWORKS'] = nil
+        end
+    end
 end

scripts/react_native_pods.rb

@@ -61,6 +61,10 @@ def use_react_native! (
   app_path: '..',
   config_file_dir: '')
 
+  # Current target definition is provided by Cocoapods and it refers to the target
+  # that has invoked the `use_react_native!` function.
+  ReactNativePodsUtils.detect_use_frameworks(current_target_definition)
+
   CodegenUtils.clean_up_build_folder(app_path, $CODEGEN_OUTPUT_DIR)
 
   # We are relying on this flag also in third parties libraries to proper install dependencies.