module Pod
  class Installer
    class Xcode
      class PodsProjectGenerator
        # Creates the target for the Pods libraries in the Pods project and the
        # relative support files.
        #
        class PodTargetInstaller < TargetInstaller
          # @return [Hash{Pathname => Pathname}] A hash of all umbrella headers, grouped by the directory
          #         the are stored in. This can be `nil` if there is no grouping.
          #
          attr_reader :umbrella_headers_by_dir

          # Initialize a new instance
          #
          # @param [Sandbox] sandbox @see TargetInstaller#sandbox
          # @param [Pod::Project] project @see TargetInstaller#project
          # @param [Target] target @see TargetInstaller#target
          # @param [Hash{Pathname => Pathname}] umbrella_headers_by_dir @see #umbrella_headers_by_dir
          #
          def initialize(sandbox, project, target, umbrella_headers_by_dir = nil)
            super(sandbox, project, target)
            @umbrella_headers_by_dir = umbrella_headers_by_dir
          end

          # Creates the target in the Pods project and the relative support files.
          #
          # @return [TargetInstallationResult] the result of the installation of this target.
          #
          def install!
            UI.message "- Installing target `#{target.name}` #{target.platform}" do
              test_file_accessors, file_accessors = target.file_accessors.partition { |fa| fa.spec.test_specification? }

              unless target.should_build?
                # For targets that should not be built (e.g. pre-built vendored frameworks etc), we add a placeholder
                # PBXAggregateTarget that will be used to wire up dependencies later.
                native_target = add_placeholder_target
                resource_bundle_targets = add_resources_bundle_targets(file_accessors).values.flatten
                return TargetInstallationResult.new(target, native_target, resource_bundle_targets)
              end

              create_support_files_dir

              native_target = add_target
              resource_bundle_targets = add_resources_bundle_targets(file_accessors).values.flatten

              test_native_targets = add_test_targets
              test_app_host_targets = add_test_app_host_targets(test_native_targets)
              test_resource_bundle_targets = add_resources_bundle_targets(test_file_accessors)

              add_files_to_build_phases(native_target, test_native_targets)

              create_xcconfig_file(native_target, resource_bundle_targets)
              create_test_xcconfig_files(test_native_targets, test_resource_bundle_targets.values.flatten)

              if target.defines_module?
                create_module_map(native_target) do |generator|
                  generator.headers.concat module_map_additional_headers
                end
                create_umbrella_header(native_target) do |generator|
                  generator.imports += if header_mappings_dir
                                         file_accessors.flat_map(&:public_headers).map do |pathname|
                                           pathname.relative_path_from(header_mappings_dir)
                                         end
                                       else
                                         file_accessors.flat_map(&:public_headers).map(&:basename)
                                      end
                end
              end

              if target.requires_frameworks?
                unless target.static_framework?
                  create_info_plist_file(target.info_plist_path, native_target, target.version, target.platform)
                end
                create_build_phase_to_symlink_header_folders(native_target)
              elsif target.uses_swift?
                add_swift_static_library_compatibility_header_phase(native_target)
              end

              unless skip_pch?(target.non_test_specs)
                path = target.prefix_header_path
                create_prefix_header(path, file_accessors, target.platform, [native_target])
              end
              unless skip_pch?(target.test_specs)
                target.supported_test_types.each do |test_type|
                  path = target.prefix_header_path_for_test_type(test_type)
                  create_prefix_header(path, test_file_accessors, target.platform, test_native_targets)
                end
              end
              create_dummy_source(native_target)
              TargetInstallationResult.new(target, native_target, resource_bundle_targets, test_native_targets,
                                           test_resource_bundle_targets, test_app_host_targets)
            end
          end

          private

          # @param [Array<Specification>] specs
          #        the specs to check against whether `.pch` generation should be skipped or not.
          #
          # @return [Boolean] Whether the target should build a pch file.
          #
          def skip_pch?(specs)
            specs.any? { |spec| spec.prefix_header_file.is_a?(FalseClass) }
          end

          # Remove the default headers folder path settings for static library pod
          # targets.
          #
          # @return [Hash{String => String}]
          #
          def custom_build_settings
            settings = super
            unless target.requires_frameworks?
              settings['PRIVATE_HEADERS_FOLDER_PATH'] = ''
              settings['PUBLIC_HEADERS_FOLDER_PATH'] = ''
            end

            settings['PRODUCT_NAME'] = target.product_basename
            settings['PRODUCT_MODULE_NAME'] = target.product_module_name

            settings['CODE_SIGN_IDENTITY[sdk=appletvos*]'] = ''
            settings['CODE_SIGN_IDENTITY[sdk=iphoneos*]'] = ''
            settings['CODE_SIGN_IDENTITY[sdk=watchos*]'] = ''

            settings['SWIFT_ACTIVE_COMPILATION_CONDITIONS'] = '$(inherited) '

            if target.swift_version
              settings['SWIFT_VERSION'] = target.swift_version
            end

            settings
          end

          # Filters the given resource file references discarding empty paths which are
          # added by their parent directory. This will also include references to the parent [PBXVariantGroup]
          # for all resources underneath it.
          #
          # @param  [Array<Pathname>] resource_file_references
          #         The array of all resource file references to filter.
          #
          # @yield_param  [Array<PBXFileReference>} The filtered resource file references to be installed
          #               in the copy resources phase.
          #
          # @yield_param  [Array<PBXFileReference>} The filtered resource file references to be installed
          #               in the compile sources phase.
          #
          # @note   Core Data model directories (.xcdatamodeld) used to be added to the
          #         `Copy Resources` build phase like all other resources, since they would
          #         compile correctly in either the resources or compile phase. In recent
          #         versions of xcode, there's an exception for data models that generate
          #         headers. These need to be added to the compile sources phase of a real
          #         target for the headers to be built in time for code in the target to
          #         use them. These kinds of models generally break when added to resource
          #         bundles.
          #
          def filter_resource_file_references(resource_file_references)
            file_references = resource_file_references.map do |resource_file_reference|
              ref = project.reference_for_path(resource_file_reference)

              # Some nested files are not directly present in the Xcode project, such as the contents
              # of an .xcdatamodeld directory. These files are implicitly included by including their
              # parent directory.
              next if ref.nil?

              # For variant groups, the variant group itself is added, not its members.
              next ref.parent if ref.parent.is_a?(Xcodeproj::Project::Object::PBXVariantGroup)

              ref
            end.compact.uniq
            compile_phase_matcher = lambda { |ref| !(ref.path =~ /.*\.xcdatamodeld/i).nil? }
            resources_phase_refs = file_references.reject(&compile_phase_matcher)
            compile_phase_refs = file_references.select(&compile_phase_matcher)
            yield resources_phase_refs, compile_phase_refs
          end

          #-----------------------------------------------------------------------#

          SOURCE_FILE_EXTENSIONS = Sandbox::FileAccessor::SOURCE_FILE_EXTENSIONS

          # Adds the build files of the pods to the target and adds a reference to
          # the frameworks of the Pods.
          #
          # @note   The Frameworks are used only for presentation purposes as the
          #         xcconfig is the authoritative source about their information.
          #
          # @note   Core Data model directories (.xcdatamodeld) defined in the `resources`
          #         property are currently added to the `Copy Resources` build phase like
          #         all other resources. The Xcode UI adds these to the `Compile Sources`
          #         build phase, but they will compile correctly either way.
          #
          # @return [void]
          #
          def add_files_to_build_phases(native_target, test_native_targets)
            target.file_accessors.each do |file_accessor|
              consumer = file_accessor.spec_consumer

              native_target = if !consumer.spec.test_specification?
                                native_target
                              else
                                test_native_target_from_spec_consumer(consumer, test_native_targets)
                              end

              headers = file_accessor.headers
              public_headers = file_accessor.public_headers.map(&:realpath)
              private_headers = file_accessor.private_headers.map(&:realpath)
              other_source_files = file_accessor.source_files.reject { |sf| SOURCE_FILE_EXTENSIONS.include?(sf.extname) }

              {
                true => file_accessor.arc_source_files,
                false => file_accessor.non_arc_source_files,
              }.each do |arc, files|
                files = files - headers - other_source_files
                flags = compiler_flags_for_consumer(consumer, arc)
                regular_file_refs = project_file_references_array(files, 'source')
                native_target.add_file_references(regular_file_refs, flags)
              end

              header_file_refs = project_file_references_array(headers, 'header')
              native_target.add_file_references(header_file_refs) do |build_file|
                add_header(build_file, public_headers, private_headers, native_target)
              end

              other_file_refs = project_file_references_array(other_source_files, 'other source')
              native_target.add_file_references(other_file_refs, nil)

              next unless target.requires_frameworks?

              filter_resource_file_references(file_accessor.resources.flatten) do |resource_phase_refs, compile_phase_refs|
                native_target.add_file_references(compile_phase_refs, nil)
                native_target.add_resources(resource_phase_refs)
              end
            end
          end

          # Adds the test app host targets for the library to the Pods project with the
          # appropriate build configurations.
          #
          # @param  [Array<PBXNativeTarget>] test_native_targets
          #         the test native targets to use when linking the app host to.
          #
          # @return [Array<PBXNativeTarget>] the app host targets created.
          #
          def add_test_app_host_targets(test_native_targets)
            target.test_specs.map do |test_spec|
              spec_consumer = test_spec.consumer(target.platform)
              next unless spec_consumer.requires_app_host?
              name = target.app_host_label(spec_consumer.test_type)
              platform_name = target.platform.name
              app_host_target = project.targets.find { |t| t.name == name }
              if app_host_target.nil?
                app_host_target = Pod::Generator::AppTargetHelper.add_app_target(project, platform_name, deployment_target, name)
                app_host_target.build_configurations.each do |configuration|
                  configuration.build_settings.merge!(custom_build_settings)
                  configuration.build_settings['PRODUCT_NAME'] = name
                  configuration.build_settings['PRODUCT_BUNDLE_IDENTIFIER'] = 'org.cocoapods.${PRODUCT_NAME:rfc1034identifier}'
                  configuration.build_settings['CODE_SIGN_IDENTITY'] = '' if target.platform == :osx
                end
                Pod::Generator::AppTargetHelper.add_app_host_main_file(project, app_host_target, platform_name, name)
                app_host_info_plist_path = target.app_host_info_plist_path_for_test_type(spec_consumer.test_type)
                create_info_plist_file(app_host_info_plist_path, app_host_target, '1.0.0', target.platform, :appl)
              end
              # Wire all test native targets with the app host.
              test_native_target = test_native_target_from_spec_consumer(spec_consumer, test_native_targets)
              test_native_target.build_configurations.each do |configuration|
                test_host = "$(BUILT_PRODUCTS_DIR)/#{name}.app/"
                test_host << 'Contents/MacOS/' if target.platform == :osx
                test_host << name.to_s
                configuration.build_settings['TEST_HOST'] = test_host
              end
              target_attributes = project.root_object.attributes['TargetAttributes'] || {}
              target_attributes[test_native_target.uuid.to_s] = { 'TestTargetID' => app_host_target.uuid.to_s }
              project.root_object.attributes['TargetAttributes'] = target_attributes
            end.compact
          end

          # Adds the test targets for the library to the Pods project with the
          # appropriate build configurations.
          #
          # @return [Array<PBXNativeTarget>] the test native targets created.
          #
          def add_test_targets
            target.supported_test_types.map do |test_type|
              product_type = target.product_type_for_test_type(test_type)
              name = target.test_target_label(test_type)
              platform_name = target.platform.name
              language = target.all_dependent_targets.any?(&:uses_swift?) ? :swift : :objc
              test_native_target = project.new_target(product_type, name, platform_name, deployment_target, nil, language)
              test_native_target.product_reference.name = name

              target.user_build_configurations.each do |bc_name, type|
                test_native_target.add_build_configuration(bc_name, type)
              end

              test_native_target.build_configurations.each do |configuration|
                configuration.build_settings.merge!(custom_build_settings)
                # target_installer will automatically add an empty `OTHER_LDFLAGS`. For test
                # targets those are set via a test xcconfig file instead.
                configuration.build_settings.delete('OTHER_LDFLAGS')
                # target_installer will automatically set the product name to the module name if the target
                # requires frameworks. For tests we always use the test target name as the product name
                # irrelevant to whether we use frameworks or not.
                configuration.build_settings['PRODUCT_NAME'] = name
                # Use xcode default product module name, which is $(PRODUCT_NAME:c99extidentifier)
                # this gives us always valid name that is distinct from the parent spec module name
                # which allow tests to use either import or @testable import to access the parent framework
                configuration.build_settings.delete('PRODUCT_MODULE_NAME')
                # We must codesign iOS XCTest bundles that contain binary frameworks to allow them to be launchable in the simulator
                unless target.platform == :osx
                  configuration.build_settings['CODE_SIGNING_REQUIRED'] = 'YES'
                  configuration.build_settings['CODE_SIGNING_ALLOWED'] = 'YES'
                end
                # For macOS we do not code sign the XCTest bundle because we do not code sign the frameworks either.
                configuration.build_settings['CODE_SIGN_IDENTITY'] = '' if target.platform == :osx
              end

              # Test native targets also need frameworks and resources to be copied over to their xctest bundle.
              create_test_target_embed_frameworks_script(test_type)
              create_test_target_copy_resources_script(test_type)

              # Generate vanila Info.plist for test target similar to the one xcode gererates for new test target.
              # This creates valid test bundle accessible at the runtime, allowing tests to load bundle resources
              # defined in podspec.
              create_info_plist_file(target.info_plist_path_for_test_type(test_type), test_native_target, '1.0', target.platform, :bndl)

              test_native_target
            end
          end

          # Adds the resources of the Pods to the Pods project.
          #
          # @note   The source files are grouped by Pod and in turn by subspec
          #         (recursively) in the resources group.
          #
          # @param  [Array<Sandbox::FileAccessor>] file_accessors
          #         the file accessors list to generate resource bundles for.
          #
          # @return [Array<PBXNativeTarget] the resource bundle native targets created.
          #
          def add_resources_bundle_targets(file_accessors)
            file_accessors.each_with_object({}) do |file_accessor, hash|
              hash[file_accessor.spec.name] = file_accessor.resource_bundles.map do |bundle_name, paths|
                label = target.resources_bundle_target_label(bundle_name)
                resource_bundle_target = project.new_resources_bundle(label, file_accessor.spec_consumer.platform_name)
                resource_bundle_target.product_reference.tap do |bundle_product|
                  bundle_file_name = "#{bundle_name}.bundle"
                  bundle_product.name = bundle_file_name
                end

                filter_resource_file_references(paths) do |resource_phase_refs, compile_phase_refs|
                  # Resource bundles are only meant to have resources, so install everything
                  # into the resources phase. See note in filter_resource_file_references.
                  resource_bundle_target.add_resources(resource_phase_refs + compile_phase_refs)
                end

                target.user_build_configurations.each do |bc_name, type|
                  resource_bundle_target.add_build_configuration(bc_name, type)
                end
                resource_bundle_target.deployment_target = deployment_target

                # Create Info.plist file for bundle
                path = target.info_plist_path
                path.dirname.mkdir unless path.dirname.exist?
                info_plist_path = path.dirname + "ResourceBundle-#{bundle_name}-#{path.basename}"
                create_info_plist_file(info_plist_path, resource_bundle_target, target.version, target.platform, :bndl)

                resource_bundle_target.build_configurations.each do |c|
                  c.build_settings['PRODUCT_NAME'] = bundle_name
                  # Do not set the CONFIGURATION_BUILD_DIR for resource bundles that are only meant for test targets.
                  # This is because the test target itself also does not set this configuration build dir and it expects
                  # all bundles to be copied from the default path.
                  unless file_accessor.spec.test_specification?
                    c.build_settings['CONFIGURATION_BUILD_DIR'] = target.configuration_build_dir('$(BUILD_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)')
                  end

                  # Set the correct device family for this bundle, based on the platform
                  device_family_by_platform = {
                    :ios => '1,2',
                    :tvos => '3',
                    :watchos => '1,2' # The device family for watchOS is 4, but Xcode creates watchkit-compatible bundles as 1,2
                  }

                  if (family = device_family_by_platform[target.platform.name])
                    c.build_settings['TARGETED_DEVICE_FAMILY'] = family
                  end
                end

                resource_bundle_target
              end
            end
          end

          # Generates the contents of the xcconfig file and saves it to disk.
          #
          # @param  [PBXNativeTarget] native_target
          #         the native target to link the xcconfig file into.
          #
          # @param  [Array<PBXNativeTarget>] resource_bundle_targets
          #         the additional resource bundle targets to link the xcconfig file into.
          #
          # @return [void]
          #
          def create_xcconfig_file(native_target, resource_bundle_targets)
            path = target.xcconfig_path
            xcconfig_gen = Generator::XCConfig::PodXCConfig.new(target)
            update_changed_file(xcconfig_gen, path)
            xcconfig_file_ref = add_file_to_support_group(path)

            native_target.build_configurations.each do |c|
              c.base_configuration_reference = xcconfig_file_ref
            end

            # also apply the private config to resource bundle targets.
            apply_xcconfig_file_ref_to_resource_bundle_targets(resource_bundle_targets, xcconfig_file_ref)
          end

          # Generates the contents of the xcconfig file used for each test target type and saves it to disk.
          #
          # @param  [Array<PBXNativeTarget>] test_native_targets
          #         the test native target to link the xcconfig file into.
          #
          # @param  [Array<PBXNativeTarget>] test_resource_bundle_targets
          #         the additional test resource bundle targets to link the xcconfig file into.
          #
          # @return [void]
          #
          def create_test_xcconfig_files(test_native_targets, test_resource_bundle_targets)
            target.supported_test_types.each do |test_type|
              path = target.xcconfig_path(test_type.to_s)
              xcconfig_gen = Generator::XCConfig::PodXCConfig.new(target, true)
              update_changed_file(xcconfig_gen, path)
              xcconfig_file_ref = add_file_to_support_group(path)

              test_native_targets.each do |test_target|
                test_target.build_configurations.each do |test_target_bc|
                  test_target_swift_debug_hack(test_target_bc)
                  test_target_bc.base_configuration_reference = xcconfig_file_ref
                end
              end

              # also apply the private config to resource bundle test targets.
              apply_xcconfig_file_ref_to_resource_bundle_targets(test_resource_bundle_targets, xcconfig_file_ref)
            end
          end

          # Creates a script that copies the resources to the bundle of the test target.
          #
          # @param [Symbol] test_type
          #        The test type to create the script for.
          #
          # @return [void]
          #
          def create_test_target_copy_resources_script(test_type)
            path = target.copy_resources_script_path_for_test_type(test_type)
            pod_targets = target.all_dependent_targets
            resource_paths_by_config = target.user_build_configurations.keys.each_with_object({}) do |config, resources_by_config|
              resources_by_config[config] = pod_targets.flat_map do |pod_target|
                include_test_spec_paths = pod_target == target
                pod_target.resource_paths(include_test_spec_paths)
              end
            end
            generator = Generator::CopyResourcesScript.new(resource_paths_by_config, target.platform)
            update_changed_file(generator, path)
            add_file_to_support_group(path)
          end

          # Creates a script that embeds the frameworks to the bundle of the test target.
          #
          # @param [Symbol] test_type
          #        The test type to create the script for.
          #
          # @return [void]
          #
          def create_test_target_embed_frameworks_script(test_type)
            path = target.embed_frameworks_script_path_for_test_type(test_type)
            pod_targets = target.all_dependent_targets
            framework_paths_by_config = target.user_build_configurations.keys.each_with_object({}) do |config, paths_by_config|
              paths_by_config[config] = pod_targets.flat_map do |pod_target|
                include_test_spec_paths = pod_target == target
                pod_target.framework_paths(include_test_spec_paths)
              end
            end
            generator = Generator::EmbedFrameworksScript.new(framework_paths_by_config)
            update_changed_file(generator, path)
            add_file_to_support_group(path)
          end

          # Manually add `libswiftSwiftOnoneSupport.dylib` as it seems there is an issue with tests that do not include it for Debug configurations.
          # Possibly related to Swift module optimization.
          #
          # @return [void]
          #
          def test_target_swift_debug_hack(test_target_bc)
            return unless test_target_bc.debug?
            return unless target.all_dependent_targets.any?(&:uses_swift?)
            ldflags = test_target_bc.build_settings['OTHER_LDFLAGS'] ||= '$(inherited)'
            ldflags << ' -lswiftSwiftOnoneSupport'
          end

          # Creates a build phase which links the versioned header folders
          # of the OS X into the framework bundle's root root directory.
          # This is only necessary because the way how headers are copied
          # via custom copy file build phases in combination with
          # header_mappings_dir interferes with xcodebuild's expectations
          # about the existence of private or public headers.
          #
          # @param  [PBXNativeTarget] native_target
          #         the native target to add the script phase into.
          #
          # @return [void]
          #
          def create_build_phase_to_symlink_header_folders(native_target)
            return unless target.platform.name == :osx && header_mappings_dir

            build_phase = native_target.new_shell_script_build_phase('Create Symlinks to Header Folders')
            build_phase.shell_script = <<-eos.strip_heredoc
          base="$CONFIGURATION_BUILD_DIR/$WRAPPER_NAME"
          ln -fs "$base/${PUBLIC_HEADERS_FOLDER_PATH\#$WRAPPER_NAME/}" "$base/${PUBLIC_HEADERS_FOLDER_PATH\#\$CONTENTS_FOLDER_PATH/}"
          ln -fs "$base/${PRIVATE_HEADERS_FOLDER_PATH\#\$WRAPPER_NAME/}" "$base/${PRIVATE_HEADERS_FOLDER_PATH\#\$CONTENTS_FOLDER_PATH/}"
            eos
          end

          # Creates a prefix header file which imports `UIKit` or `Cocoa` according
          # to the platform of the target. This file also include any prefix header
          # content reported by the specification of the pods.
          #
          # @param [Pathname] path
          #        the path to generate the prefix header for.
          #
          # @param [Array<Sandbox::FileAccessor>] file_accessors
          #        the file accessors to use for this prefix header that point to a path of a prefix header.
          #
          # @param [Platform] platform
          #        the platform to use for this prefix header.
          #
          # @param [Array<PBXNativeTarget>] native_targets
          #        the native targets on which the prefix header should be configured for.
          #
          # @return [void]
          #
          def create_prefix_header(path, file_accessors, platform, native_targets)
            generator = Generator::PrefixHeader.new(file_accessors, platform)
            update_changed_file(generator, path)
            add_file_to_support_group(path)

            native_targets.each do |native_target|
              native_target.build_configurations.each do |c|
                relative_path = path.relative_path_from(project.path.dirname)
                c.build_settings['GCC_PREFIX_HEADER'] = relative_path.to_s
              end
            end
          end

          ENABLE_OBJECT_USE_OBJC_FROM = {
            :ios => Version.new('6'),
            :osx => Version.new('10.8'),
            :watchos => Version.new('2.0'),
            :tvos => Version.new('9.0'),
          }.freeze

          # Returns the compiler flags for the source files of the given specification.
          #
          # The following behavior is regarding the `OS_OBJECT_USE_OBJC` flag. When
          # set to `0`, it will allow code to use `dispatch_release()` on >= iOS 6.0
          # and OS X 10.8.
          #
          # * New libraries that do *not* require ARC don’t need to care about this
          #   issue at all.
          #
          # * New libraries that *do* require ARC _and_ have a deployment target of
          #   >= iOS 6.0 or OS X 10.8:
          #
          #   These no longer use `dispatch_release()` and should *not* have the
          #   `OS_OBJECT_USE_OBJC` flag set to `0`.
          #
          #   **Note:** this means that these libraries *have* to specify the
          #             deployment target in order to function well.
          #
          # * New libraries that *do* require ARC, but have a deployment target of
          #   < iOS 6.0 or OS X 10.8:
          #
          #   These contain `dispatch_release()` calls and as such need the
          #   `OS_OBJECT_USE_OBJC` flag set to `1`.
          #
          #   **Note:** libraries that do *not* specify a platform version are
          #             assumed to have a deployment target of < iOS 6.0 or OS X 10.8.
          #
          #  For more information, see: http://opensource.apple.com/source/libdispatch/libdispatch-228.18/os/object.h
          #
          # @param  [Specification::Consumer] consumer
          #         The consumer for the specification for which the compiler flags
          #         are needed.
          #
          # @return [String] The compiler flags.
          #
          def compiler_flags_for_consumer(consumer, arc)
            flags = consumer.compiler_flags.dup
            if !arc
              flags << '-fno-objc-arc'
            else
              platform_name = consumer.platform_name
              spec_deployment_target = consumer.spec.deployment_target(platform_name)
              if spec_deployment_target.nil? || Version.new(spec_deployment_target) < ENABLE_OBJECT_USE_OBJC_FROM[platform_name]
                flags << '-DOS_OBJECT_USE_OBJC=0'
              end
            end
            if target.inhibit_warnings?
              flags << '-w -Xanalyzer -analyzer-disable-all-checks'
            end
            flags * ' '
          end

          def apply_xcconfig_file_ref_to_resource_bundle_targets(resource_bundle_targets, xcconfig_file_ref)
            resource_bundle_targets.each do |rsrc_target|
              rsrc_target.build_configurations.each do |rsrc_bc|
                rsrc_bc.base_configuration_reference = xcconfig_file_ref
              end
            end
          end

          def create_module_map(native_target)
            return super(native_target) unless custom_module_map

            path = target.module_map_path
            UI.message "- Copying module map file to #{UI.path(path)}" do
              contents = custom_module_map.read
              unless target.requires_frameworks?
                contents.gsub!(/^(\s*)framework\s+(module[^{}]+){/, '\1\2{')
              end
              generator = Generator::Constant.new(contents)
              update_changed_file(generator, path)
              add_file_to_support_group(path)

              native_target.build_configurations.each do |c|
                relative_path = path.relative_path_from(sandbox.root)
                c.build_settings['MODULEMAP_FILE'] = relative_path.to_s
              end
            end
          end

          def module_map_additional_headers
            return [] unless umbrella_headers_by_dir

            other_paths = umbrella_headers_by_dir[target.module_map_path.dirname] - [target.umbrella_header_path]
            other_paths.map do |module_map_path|
              # exclude other targets umbrella headers, to avoid
              # incomplete umbrella warnings
              Generator::ModuleMap::Header.new(module_map_path.basename, nil, nil, nil, true)
            end
          end

          def create_umbrella_header(native_target)
            return super(native_target) unless custom_module_map
          end

          def custom_module_map
            @custom_module_map ||= target.file_accessors.first.module_map
          end

          def project_file_references_array(files, file_type)
            files.map do |sf|
              project.reference_for_path(sf).tap do |ref|
                raise Informative, "Unable to find #{file_type} ref for #{sf} for target #{target.name}." unless ref
              end
            end
          end

          def header_mappings_dir
            return @header_mappings_dir if defined?(@header_mappings_dir)
            file_accessor = target.file_accessors.first
            @header_mappings_dir = if dir = file_accessor.spec_consumer.header_mappings_dir
                                     file_accessor.path_list.root + dir
                                   end
          end

          def add_header(build_file, public_headers, private_headers, native_target)
            file_ref = build_file.file_ref
            acl = if !target.requires_frameworks? # Headers are already rooted at ${PODS_ROOT}/Headers/P*/[pod]/...
                    'Project'
                  elsif public_headers.include?(file_ref.real_path)
                    'Public'
                  elsif private_headers.include?(file_ref.real_path)
                    'Private'
                  else
                    'Project'
                  end

            if target.requires_frameworks? && header_mappings_dir && acl != 'Project'
              relative_path = file_ref.real_path.relative_path_from(header_mappings_dir)
              sub_dir = relative_path.dirname
              copy_phase_name = "Copy #{sub_dir} #{acl} Headers"
              copy_phase = native_target.copy_files_build_phases.find { |bp| bp.name == copy_phase_name } ||
                native_target.new_copy_files_build_phase(copy_phase_name)
              copy_phase.symbol_dst_subfolder_spec = :products_directory
              copy_phase.dst_path = "$(#{acl.upcase}_HEADERS_FOLDER_PATH)/#{sub_dir}"
              copy_phase.add_file_reference(file_ref, true)
            else
              build_file.settings ||= {}
              build_file.settings['ATTRIBUTES'] = [acl]
            end
          end

          def support_files_group
            pod_name = target.pod_name
            dir = target.support_files_dir
            project.pod_support_files_group(pod_name, dir)
          end

          def test_native_target_from_spec_consumer(spec_consumer, test_native_targets)
            test_native_targets.find do |native_target|
              native_target.symbol_type == target.product_type_for_test_type(spec_consumer.test_type)
            end
          end

          # Adds a placeholder native target for the library to the Pods project with the
          # appropriate build configurations.
          #
          # @return [PBXAggregateTarget] the native target that was added.
          #
          def add_placeholder_target
            native_target = project.new_aggregate_target(target.label)
            native_target.deployment_target = deployment_target
            target.user_build_configurations.each do |bc_name, type|
              native_target.add_build_configuration(bc_name, type)
            end
            native_target.build_configurations.each do |configuration|
              configuration.build_settings['ARCHS'] = target.archs
            end
            native_target
          end

          # Adds a shell script phase, intended only for static library targets that contain swift,
          # to copy the ObjC compatibility header (the -Swift.h file that the swift compiler generates)
          # to the built products directory. Additionally, the script phase copies the module map, appending a `.Swift`
          # submodule that references the (moved) compatibility header. Since the module map has been moved, the umbrella header
          # is _also_ copied, so that it is sitting next to the module map. This is necessary for a successful archive build.
          #
          # @param  [PBXNativeTarget] native_target
          #         the native target to add the Swift static library script phase into.
          #
          # @return [Void]
          #
          def add_swift_static_library_compatibility_header_phase(native_target)
            build_phase = native_target.new_shell_script_build_phase('Copy generated compatibility header')

            relative_module_map_path = target.module_map_path.relative_path_from(target.sandbox.root)
            relative_umbrella_header_path = target.umbrella_header_path.relative_path_from(target.sandbox.root)

            build_phase.shell_script = <<-SH.strip_heredoc
              COMPATIBILITY_HEADER_PATH="${BUILT_PRODUCTS_DIR}/Swift Compatibility Header/${PRODUCT_MODULE_NAME}-Swift.h"
              MODULE_MAP_PATH="${BUILT_PRODUCTS_DIR}/${PRODUCT_MODULE_NAME}.modulemap"

              ditto "${DERIVED_SOURCES_DIR}/${PRODUCT_MODULE_NAME}-Swift.h" "${COMPATIBILITY_HEADER_PATH}"
              ditto "${PODS_ROOT}/#{relative_module_map_path}" "${MODULE_MAP_PATH}"
              ditto "${PODS_ROOT}/#{relative_umbrella_header_path}" "${BUILT_PRODUCTS_DIR}"
              printf "\\n\\nmodule ${PRODUCT_MODULE_NAME}.Swift {\\n  header \\"${COMPATIBILITY_HEADER_PATH}\\"\\n  requires objc\\n}\\n" >> "${MODULE_MAP_PATH}"
            SH
            build_phase.input_paths = %W(
              ${DERIVED_SOURCES_DIR}/${PRODUCT_MODULE_NAME}-Swift.h
              ${PODS_ROOT}/#{relative_module_map_path}
              ${PODS_ROOT}/#{relative_umbrella_header_path}
            )
            build_phase.output_paths = %W(
              ${BUILT_PRODUCTS_DIR}/${PRODUCT_MODULE_NAME}.modulemap
              ${BUILT_PRODUCTS_DIR}/#{relative_umbrella_header_path.basename}
              ${BUILT_PRODUCTS_DIR}/Swift\ Compatibility\ Header/${PRODUCT_MODULE_NAME}-Swift.h
            )
          end

          #-----------------------------------------------------------------------#
        end
      end
    end
  end
end
