UnrealEngineUWP/Engine/Source/Programs/UnrealBuildTool/ProjectFiles/Xcode/XcodeProject.cs

// Copyright Epic Games, Inc. All Rights Reserved.

using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Linq;
using System.Linq;
using System.Text;
using EpicGames.Core;
using UnrealBuildBase;
using Microsoft.Extensions.Logging;
using System.Text.RegularExpressions;
using System.Diagnostics.CodeAnalysis;


/*****

Here's how this works:

  * An XcodeProjectFile (subclass of generic ProjectFile class) is created, along with it - UnrealData and XcodeFileCollection objects are made
  * High level code calls AddModule() which this code will use to cache information about the Modules in the project (including build settings, etc)
    * These are used to determine what source files can be indexed together (we use native xcode code compilation for indexing, so we make compiling succesful for best index)
    * A few #defines are removed or modified (FOO_API, etc) which would otherwise make every module a separate target
  * High level code then calls WriteProjectFile() which is the meat of all this
  * This code then creates a hierarchy/reference-chain of xcode project nodes (an xcode project is basically a series of Guid/object pairs that reference each other)
  * Then each node writes itself into the project file that is saved to disk

.xcconfig files:
  * We also now use Xcconfig files for all of the build settings, instead of jamming them into the xcode project file itself
  * This makes it easier to see the various settings (you can also see them in the Xcode UI as before, but now with more read-only columns - they must be set via editing the file)
  * The files are in the Xcode file browsing pane, in the an Xcconfigs folder under each project
  * The files are:
    * _Project - settings apply to all targets in the projectapplies to all targets), one for each configuration (Debug, Development Editor, etc) which applies to all targets
    * _Debug/_DevelopmentEditor, etc - applies to all targets when building in that configuration
    * _Run - applies to the native run project, which does no compiling
    * _Index/SubIndex0, etc - applies when Indexing, which uses native Xcode compiling (these will include #defines from UBT, etc)
  * There is currently no _Build xcconfig file since it's a makefile project and has no build setting needs


Known issues:
  * No PBXFrameworksBuildPhase nodes are made
 
Future ideas:
  * I have started working on a Template project that we merge Build/Index targets into, which will allow a licensee to setup codesigning, add extensions, etc. 
  * Always make a final build xcodeproj from UBT for handling the codesigning/extensions/frameworks
  * Allow for non-conflicting #defines to share SubIndex targets, hopefully will greatly reduce the sub targets in UE5

**/

namespace UnrealBuildTool.XcodeProjectXcconfig
{
	static class StringBuilderExtensions
	{
		public static void WriteLine(this StringBuilder SB, string Line = "")
		{
			SB.Append(Line);
			SB.Append(ProjectFileGenerator.NewLine);
		}
		public static void WriteLine(this StringBuilder SB, int Indent, string Line = "")
		{
			SB.Append(new String('\t', Indent));
			SB.Append(Line);
			SB.Append(ProjectFileGenerator.NewLine);
		}
	}


	class UnrealBuildConfig
	{
		public UnrealBuildConfig(string InDisplayName, string InBuildTarget, FileReference? InMacExecutablePath, FileReference? InIOSExecutablePath, FileReference? InTVOSExecutablePath,
			ProjectTarget? InProjectTarget, UnrealTargetConfiguration InBuildConfig)
		{
			DisplayName = InDisplayName;
			MacExecutablePath = InMacExecutablePath;
			IOSExecutablePath = InIOSExecutablePath;
			TVOSExecutablePath = InTVOSExecutablePath;
			BuildTarget = InBuildTarget;
			ProjectTarget = InProjectTarget;
			BuildConfig = InBuildConfig;
		}

		public string DisplayName;
		public FileReference? MacExecutablePath;
		public FileReference? IOSExecutablePath;
		public FileReference? TVOSExecutablePath;
		public string BuildTarget;
		public ProjectTarget? ProjectTarget;
		public UnrealTargetConfiguration BuildConfig;

		public bool bSupportsMac { get =>
			XcodeProjectFileGenerator.ProjectFilePlatform.HasFlag(XcodeProjectFileGenerator.XcodeProjectFilePlatform.Mac) &&
			(ProjectTarget == null || ProjectTarget.SupportedPlatforms.Contains(UnrealTargetPlatform.Mac));
		}
		public bool bSupportsIOS { get =>
			XcodeProjectFileGenerator.ProjectFilePlatform.HasFlag(XcodeProjectFileGenerator.XcodeProjectFilePlatform.iOS) &&
			(ProjectTarget == null || ProjectTarget.SupportedPlatforms.Contains(UnrealTargetPlatform.IOS));
		}
		public bool bSupportsTVOS { get =>
			XcodeProjectFileGenerator.ProjectFilePlatform.HasFlag(XcodeProjectFileGenerator.XcodeProjectFilePlatform.tvOS) &&
			(ProjectTarget == null || ProjectTarget.SupportedPlatforms.Contains(UnrealTargetPlatform.TVOS));
		}
	};

	class UnrealBatchedFiles
	{
		// build settings that cause uniqueness
		public string Definitions = "";
		public FileReference? PCHFile = null;
		public bool bEnableRTTI = false;

		// union of settings for all modules
		public HashSet<string> APIDefines = new();
		public HashSet<DirectoryReference> SystemIncludePaths = new();
		public HashSet<DirectoryReference> UserIncludePaths = new();

		public List<XcodeSourceFile> Files = new();
		public List<UEBuildModuleCPP> Modules = new List<UEBuildModuleCPP>();

		public void WriteXcconfigSettings(StringBuilder Content)
		{
			Content.WriteLine($"GCC_PREPROCESSOR_DEFINITIONS = __INTELLISENSE__ MONOLITHIC_BUILD=1 {Definitions} {string.Join(" ", APIDefines)}");
			if (PCHFile != null)
			{
				Content.WriteLine($"GCC_PREFIX_HEADER = {PCHFile.FullName}");
			}
			Content.WriteLine($"GCC_ENABLE_CPP_RTTI = " + (bEnableRTTI ? "YES" : "NO"));

			string SearchPaths = string.Join(" ", SystemIncludePaths.Select(x => x.FullName.Contains(' ') ? $"\"{x.FullName}\"" : x.FullName));
			SearchPaths = SearchPaths.Replace("/x86_64/", "/$(ARCHS)/");
			Content.WriteLine($"HEADER_SEARCH_PATHS = {SearchPaths}");

			SearchPaths = string.Join(" ", UserIncludePaths.Select(x => x.FullName.Contains(' ') ? $"\"{x.FullName}\"" : x.FullName));
			SearchPaths = SearchPaths.Replace("/x86_64/", "/$(ARCHS)/");
			Content.WriteLine($"USER_HEADER_SEARCH_PATHS = {SearchPaths}");
		}
	}

	class UnrealData
	{
		public bool bIsAppBundle;
		public bool bHasEditorConfiguration;
		public bool bUseAutomaticSigning = false;
		public bool bIsMergingProjects = false;
		public bool bWriteCodeSigningSettings = true;

		public List<UnrealBuildConfig> AllConfigs = new();

		public List<UnrealExtensionInfo> AllExtensions = new();

		public List<UnrealBatchedFiles> BatchedFiles = new();
 
		public FileReference? UProjectFileLocation = null;
		public FileReference? XcodeProjectFileLocation = null;

		// settings read from project configs
		public IOSProjectSettings? IOSProjectSettings;
		public IOSProvisioningData? IOSProvisioningData;

		public TVOSProjectSettings? TVOSProjectSettings;
		public TVOSProvisioningData? TVOSProvisioningData;

		public string ProductName="";

		/// <summary>
		///  Used to mark the project for distribution (some platforms require this)
		/// </summary>
		public bool bForDistribution = false;

		/// <summary>
		/// Override for bundle identifier
		/// </summary>
		public string BundleIdentifier = "";

		/// <summary>
		/// Override AppName
		/// </summary>
		public string AppName = "";

		/// <summary>
		/// Architectures supported for iOS
		/// </summary>
		public string[] SupportedIOSArchitectures = { "arm64" };

		/// <summary>
		/// UBT logger object
		/// </summary>
		public ILogger? Logger;

		private XcodeProjectFile? ProjectFile;

		public bool Initialize(XcodeProjectFile ProjectFile, List<UnrealTargetPlatform> Platforms, List<UnrealTargetConfiguration> Configurations, ILogger Logger)
		{
			this.ProjectFile = ProjectFile;
			this.Logger = Logger;
			ProductName = ProjectFile.ProjectFilePath.GetFileNameWithoutAnyExtensions();
			XcodeProjectFileLocation = ProjectFile.ProjectFilePath;


			// Figure out all the desired configurations on the unreal side
			AllConfigs = GetSupportedBuildConfigs(Platforms, Configurations, Logger);
			// if we can't find any configs, we will fail to create a project
			if (AllConfigs.Count == 0)
			{
				return false;
			}


			// find a uproject file (UE5 target won't have one)
			foreach (Project Target in ProjectFile.ProjectTargets)
			{
				if (Target.UnrealProjectFilePath != null)
				{
					UProjectFileLocation = Target.UnrealProjectFilePath;
					break;
				}
			}

			// this project makes an app bundle (.app directory instead of a raw executable or dylib) if none of the fings make a non-appbundle
			bIsAppBundle = !AllConfigs.Any(x => x.ProjectTarget!.TargetRules!.bIsBuildingConsoleApplication || x.ProjectTarget.TargetRules.bShouldCompileAsDLL);
			bHasEditorConfiguration = AllConfigs.Any(x => x.ProjectTarget!.TargetRules!.Type == TargetType.Editor);

			// read config settings
			if (InstalledPlatformInfo.IsValidPlatform(UnrealTargetPlatform.IOS, EProjectType.Code))
			{
				IOSPlatform IOSPlatform = ((IOSPlatform)UEBuildPlatform.GetBuildPlatform(UnrealTargetPlatform.IOS));
				IOSProjectSettings = IOSPlatform.ReadProjectSettings(UProjectFileLocation);
				IOSProvisioningData = IOSPlatform.ReadProvisioningData(IOSProjectSettings, bForDistribution);
				bUseAutomaticSigning |= IOSProjectSettings.bAutomaticSigning;
			}


			if (InstalledPlatformInfo.IsValidPlatform(UnrealTargetPlatform.IOS, EProjectType.Code))
			{
				TVOSPlatform TVOSPlatform = ((TVOSPlatform)UEBuildPlatform.GetBuildPlatform(UnrealTargetPlatform.TVOS));
				TVOSProjectSettings = TVOSPlatform.ReadProjectSettings(UProjectFileLocation);
				TVOSProvisioningData = TVOSPlatform.ReadProvisioningData(TVOSProjectSettings, bForDistribution);
				bUseAutomaticSigning |= TVOSProjectSettings.bAutomaticSigning;
			}

			return true;
		}

		public void AddModule(UEBuildModuleCPP Module, CppCompileEnvironment CompileEnvironment)
		{
			// we need to keep all _API defines, but we can gather them up to append at the end, instead of using them to compute sameness

			// remove some extraneous defines that will cause every module to be unique, but we can do without
			List<string> Defines = new();
			List<string> APIDefines = new();
			Regex Regex = new Regex("#define ([A-Z0-9_]*) ?(.*)?");

			string DefinesString = "";
			FileReference? PCHFile = null;
			if (CompileEnvironment.ForceIncludeFiles.Count == 0)
			{
				// if there are no ForceInclude files, then that means it's a module that forces the includes to come from a generated PCH file
				// and so we will use this for definitions and uniqueness
				PCHFile = CompileEnvironment.PrecompiledHeaderIncludeFilename;
			}
			else
			{
				foreach (string Line in File.ReadAllLines(CompileEnvironment.ForceIncludeFiles.First(x => x.FullName.Contains("Definitions")).FullName))
				{
					Match Match = Regex.Match(Line);
					if (!Match.Success)
					{
						continue;
					}

					string Key = Match.Groups[1].Value;
					string Value = Match.Groups[2].Value;
					// if no value, then just define with no = stuff
					if (!Match.Groups[2].Success)
					{
						Defines.Add(Key);
						continue;
					}

					// skip some known per-module defines we don't need
					if (Key.StartsWith("UE_MODULE_NAME") || Key.StartsWith("UE_PLUGIN_NAME") || Key.StartsWith("UBT_MODULE_MANIFEST"))
					{
						continue;
					}
					// these API ones are per module but still need to be defined, can be defined to nothing
					else if (Key.Contains("_API"))
					{
						APIDefines.Add($"{Key}=");
					}
					else
					{
						// if the value is normal, just add the define as is
						if (Value.All(x => char.IsLetterOrDigit(x) || x == '_'))
						{
							Defines.Add($"{Key}={Value}");
						}
						else
						{
							// escape any quotes in the define, then quote the whole thing
							Value = Value.Replace("\"", "\\\"");
							Defines.Add($"{Key}=\"{Value}\"");
						}
					}
				}

				// sort and joing them into a single string to act as a key (and happily string to put into .xcconfig)
				Defines.Sort();
				DefinesString = string.Join(" ", Defines);
			}

			// now find a matching SubTarget, and make a new one if needed
			UnrealBatchedFiles? FileBatch = null;
			foreach (UnrealBatchedFiles Search in BatchedFiles)
			{
				if (Search.Definitions == DefinesString && Search.PCHFile == PCHFile &&
					Search.bEnableRTTI == CompileEnvironment.bUseRTTI)
				{
					FileBatch = Search;
					break;
				}
			}
			if (FileBatch == null)
			{
				//FileBatch = new UnrealBatchedFiles(UnrealData, SubTargets.Count + 1);
				FileBatch = new UnrealBatchedFiles();
				BatchedFiles.Add(FileBatch);
				FileBatch.Definitions = DefinesString;
				FileBatch.PCHFile = PCHFile;
				FileBatch.bEnableRTTI = CompileEnvironment.bUseRTTI;
			}

			FileBatch.Modules.Add(Module);
			FileBatch.APIDefines.UnionWith(APIDefines);
			FileBatch.SystemIncludePaths.UnionWith(CompileEnvironment.SystemIncludePaths);
			FileBatch.UserIncludePaths.UnionWith(CompileEnvironment.UserIncludePaths);
		}

		public void FilterBuildableFiles(XcodeFileCollection FileCollection)
		{
			foreach (XcodeSourceFile File in FileCollection.BuildableFiles)
			{
				AddFileToBatch(File);
			}
		}

		internal void AddFileToBatch(XcodeSourceFile File)
		{
			foreach (UnrealBatchedFiles Batch in BatchedFiles)
			{
				foreach (UEBuildModuleCPP Module in Batch.Modules)
				{
					if (Module.ContainsFile(File.Reference))
					{
						Batch.Files.Add(File);
						return;
					}
				}
			}
		}


		private List<UnrealBuildConfig> GetSupportedBuildConfigs(List<UnrealTargetPlatform> Platforms, List<UnrealTargetConfiguration> Configurations, ILogger Logger)
		{
			List<UnrealBuildConfig> BuildConfigs = new List<UnrealBuildConfig>();

			//string ProjectName = ProjectFilePath.GetFileNameWithoutExtension();

			foreach (UnrealTargetConfiguration Configuration in Configurations)
			{
				if (InstalledPlatformInfo.IsValidConfiguration(Configuration, EProjectType.Code))
				{
					foreach (UnrealTargetPlatform Platform in Platforms)
					{
						if (InstalledPlatformInfo.IsValidPlatform(Platform, EProjectType.Code) && (Platform == UnrealTargetPlatform.Mac || Platform == UnrealTargetPlatform.IOS || Platform == UnrealTargetPlatform.TVOS)) // @todo support other platforms
						{
							UEBuildPlatform? BuildPlatform;
							if (UEBuildPlatform.TryGetBuildPlatform(Platform, out BuildPlatform) && (BuildPlatform.HasRequiredSDKsInstalled() == SDKStatus.Valid))
							{
								// Check we have targets (Expected to be no Engine targets when generating for a single .uproject)
								if (ProjectFile!.ProjectTargets.Count == 0 && ProjectFile!.BaseDir != Unreal.EngineDirectory)
								{
									throw new BuildException($"Expecting at least one ProjectTarget to be associated with project '{XcodeProjectFileLocation}' in the TargetProjects list ");
								}

								// Now go through all of the target types for this project
								foreach (ProjectTarget ProjectTarget in ProjectFile.ProjectTargets.OfType<ProjectTarget>())
								{
									if (MSBuildProjectFile.IsValidProjectPlatformAndConfiguration(ProjectTarget, Platform, Configuration, Logger))
									{
										// Figure out if this is a monolithic build
										bool bShouldCompileMonolithic = BuildPlatform.ShouldCompileMonolithicBinary(Platform);
										bShouldCompileMonolithic |= (ProjectTarget.CreateRulesDelegate(Platform, Configuration).LinkType == TargetLinkType.Monolithic);

										string ConfigName = Configuration.ToString();
										if (ProjectTarget.TargetRules!.Type != TargetType.Game && ProjectTarget.TargetRules.Type != TargetType.Program)
										{
											ConfigName += " " + ProjectTarget.TargetRules.Type.ToString();
										}

										if (BuildConfigs.Where(Config => Config.DisplayName == ConfigName).ToList().Count == 0)
										{
											string TargetName = ProjectTarget.TargetFilePath.GetFileNameWithoutAnyExtensions();

											// Get the output directory
											DirectoryReference RootDirectory = Unreal.EngineDirectory;
											// Unique and Monolithic both need to use the target directory not the engine directory
											if (ProjectTarget.TargetRules.Type != TargetType.Program && (bShouldCompileMonolithic || ProjectTarget.TargetRules.BuildEnvironment == TargetBuildEnvironment.Unique))
											{
												if (ProjectTarget.UnrealProjectFilePath != null)
												{
													RootDirectory = ProjectTarget.UnrealProjectFilePath.Directory;
												}
											}

											if (ProjectTarget.TargetRules.Type == TargetType.Program && ProjectTarget.UnrealProjectFilePath != null)
											{
												RootDirectory = ProjectTarget.UnrealProjectFilePath.Directory;
											}

											// Get the output directory
											DirectoryReference OutputDirectory = DirectoryReference.Combine(RootDirectory, "Binaries");

											string ExeName = TargetName;
											if (!bShouldCompileMonolithic && ProjectTarget.TargetRules.Type != TargetType.Program)
											{
												// Figure out what the compiled binary will be called so that we can point the IDE to the correct file
												if (ProjectTarget.TargetRules.Type != TargetType.Game)
												{
													// Only if shared - unique retains the Target Name
													if (ProjectTarget.TargetRules.BuildEnvironment == TargetBuildEnvironment.Shared)
													{
														ExeName = "Unreal" + ProjectTarget.TargetRules.Type.ToString();
													}
												}
											}

											if (BuildPlatform.Platform == UnrealTargetPlatform.Mac)
											{
												string MacExecutableName = MakeExecutableFileName(ExeName, UnrealTargetPlatform.Mac, Configuration, ProjectTarget.TargetRules.Architecture, ProjectTarget.TargetRules.UndecoratedConfiguration);
												string IOSExecutableName = MacExecutableName.Replace("-Mac-", "-IOS-");
												string TVOSExecutableName = MacExecutableName.Replace("-Mac-", "-TVOS-");
												BuildConfigs.Add(new UnrealBuildConfig(ConfigName, TargetName, FileReference.Combine(OutputDirectory, "Mac", MacExecutableName), FileReference.Combine(OutputDirectory, "IOS", IOSExecutableName), FileReference.Combine(OutputDirectory, "TVOS", TVOSExecutableName), ProjectTarget, Configuration));
											}
											else if (BuildPlatform.Platform == UnrealTargetPlatform.IOS || BuildPlatform.Platform == UnrealTargetPlatform.TVOS)
											{
												string IOSExecutableName = MakeExecutableFileName(ExeName, UnrealTargetPlatform.IOS, Configuration, ProjectTarget.TargetRules.Architecture, ProjectTarget.TargetRules.UndecoratedConfiguration);
												string TVOSExecutableName = IOSExecutableName.Replace("-IOS-", "-TVOS-");
												//string MacExecutableName = IOSExecutableName.Replace("-IOS-", "-Mac-");
												BuildConfigs.Add(new UnrealBuildConfig(ConfigName, TargetName, FileReference.Combine(OutputDirectory, "Mac", IOSExecutableName), FileReference.Combine(OutputDirectory, "IOS", IOSExecutableName), FileReference.Combine(OutputDirectory, "TVOS", TVOSExecutableName), ProjectTarget, Configuration));
											}
										}
									}
								}
							}
						}
					}
				}
			}

			return BuildConfigs;
		}

		public static IEnumerable<UnrealTargetPlatform> GetSupportedPlatforms()
		{
			List<UnrealTargetPlatform> SupportedPlatforms = new List<UnrealTargetPlatform>();

			if (XcodeProjectFileGenerator.ProjectFilePlatform.HasFlag(XcodeProjectFileGenerator.XcodeProjectFilePlatform.Mac))
			{
				SupportedPlatforms.Add(UnrealTargetPlatform.Mac);
			}

			if (XcodeProjectFileGenerator.ProjectFilePlatform.HasFlag(XcodeProjectFileGenerator.XcodeProjectFilePlatform.iOS))
			{
				SupportedPlatforms.Add(UnrealTargetPlatform.IOS);
			}

			if (XcodeProjectFileGenerator.ProjectFilePlatform.HasFlag(XcodeProjectFileGenerator.XcodeProjectFilePlatform.tvOS))
			{
				SupportedPlatforms.Add(UnrealTargetPlatform.TVOS);
			}

			return SupportedPlatforms;
		}

		public static IEnumerable<UnrealTargetConfiguration> GetSupportedConfigurations()
		{
			return new UnrealTargetConfiguration[] {
				UnrealTargetConfiguration.Debug,
				UnrealTargetConfiguration.DebugGame,
				UnrealTargetConfiguration.Development,
				UnrealTargetConfiguration.Test,
				UnrealTargetConfiguration.Shipping
			};
		}

		public static bool ShouldIncludeProjectInWorkspace(ProjectFile Proj, ILogger Logger)
		{
			return CanBuildProjectLocally(Proj, Logger);
		}

		public static bool CanBuildProjectLocally(ProjectFile Proj, ILogger Logger)
		{
			foreach (Project ProjectTarget in Proj.ProjectTargets)
			{
				foreach (UnrealTargetPlatform Platform in GetSupportedPlatforms())
				{
					foreach (UnrealTargetConfiguration Config in GetSupportedConfigurations())
					{
						if (MSBuildProjectFile.IsValidProjectPlatformAndConfiguration(ProjectTarget, Platform, Config, Logger))
						{
							return true;
						}
					}
				}
			}

			return false;
		}

		private static string MakeExecutableFileName(string BinaryName, UnrealTargetPlatform Platform, UnrealTargetConfiguration Configuration, string Architecture, UnrealTargetConfiguration UndecoratedConfiguration)
		{
			StringBuilder Result = new StringBuilder();

			Result.Append(BinaryName);

			if (Configuration != UndecoratedConfiguration)
			{
				Result.AppendFormat("-{0}-{1}", Platform.ToString(), Configuration.ToString());
			}

			UEBuildPlatform BuildPlatform = UEBuildPlatform.GetBuildPlatform(Platform);
			if (BuildPlatform.RequiresArchitectureSuffix())
			{
				Result.Append(Architecture);
			}

			return Result.ToString();
		}


		// cache for the below function
		Dictionary<string, IEnumerable<string>> CachedMacProjectArchitectures = new Dictionary<string, IEnumerable<string>>();

		/// <summary>
		/// Returns the Mac architectures that should be configured for the provided target. If the target has a project we'll adhere
		/// to whether it's set as Intel/Universal/Apple unless the type is denied (pretty much just Editor)
		/// 
		/// If the target has no project we'll support allow-listed targets for installed builds and all non-editor architectures 
		/// for source builds. Not all programs are going to compile for Apple Silicon, but being able to build and fail is useful...
		/// </summary>
		/// <param name="Config">Build config for the target we're generating</param>
		/// <param name="InProjectFile">Path to the project file, or null if the target has no project</param>
		/// <returns></returns>
		public IEnumerable<string> GetSupportedMacArchitectures(UnrealBuildConfig Config, FileReference? InProjectFile)
		{
			// All architectures supported
			IEnumerable<string> AllArchitectures = new[] { MacExports.IntelArchitecture, MacExports.AppleArchitecture };

			// Add a way on the command line of forcing a project file with all architectures (there isn't a good way to let this be
			// set and checked where we can access it).
			bool ForceAllArchitectures = Environment.GetCommandLineArgs().Contains("AllArchitectures", StringComparer.OrdinalIgnoreCase);

			if (ForceAllArchitectures)
			{
				return AllArchitectures;
			}

			string TargetName = Config.BuildTarget;

			// First time seeing this target?
			if (!CachedMacProjectArchitectures.ContainsKey(TargetName))
			{
				// Default to Intel
				IEnumerable<string> TargetArchitectures = new[] { MacExports.IntelArchitecture };

				// These targets are known to work so are allow-listed
				bool IsAllowed = MacExports.TargetsAllowedForAppleSilicon.Contains(TargetName, StringComparer.OrdinalIgnoreCase);

				// determine the target architectures based on what's allowed/denied
				if (IsAllowed)
				{
					TargetArchitectures = AllArchitectures;
				}
				else
				{
					// if this is an unspecified tool/program, default to Intel for installed builds because we know all of that works. 
					if (Config.ProjectTarget!.TargetRules!.Type == TargetType.Program)
					{
						// For misc tools we default to Intel for installed builds because we know all of that works. 
						TargetArchitectures = Unreal.IsEngineInstalled() ? new[] { MacExports.IntelArchitecture } : AllArchitectures;
					}
					else
					{
						// For project targets we default to Intel then check the project settings. Note the editor target will have
						// been denied above already.
						TargetArchitectures = new[] { MacExports.IntelArchitecture };

						ConfigHierarchy EngineIni = ConfigCache.ReadHierarchy(ConfigHierarchyType.Engine, InProjectFile?.Directory, UnrealTargetPlatform.Mac);
						string TargetArchitecture;
						string Key = Config.ProjectTarget!.TargetRules!.Type == TargetType.Editor ? "EditorTargetArchitecture" : "TargetArchitecture";
						if (EngineIni.GetString("/Script/MacTargetPlatform.MacTargetSettings", Key, out TargetArchitecture))
						{
							if (TargetArchitecture.Contains("Universal", StringComparison.OrdinalIgnoreCase))
							{
								TargetArchitectures = AllArchitectures;
							}
							else if (TargetArchitecture.Contains("Intel", StringComparison.OrdinalIgnoreCase))
							{
								TargetArchitectures = new[] { MacExports.IntelArchitecture };
							}
							else if (TargetArchitecture.Contains("Apple", StringComparison.OrdinalIgnoreCase))
							{
								TargetArchitectures = new[] { MacExports.AppleArchitecture };
							}
						}
					}
				}

				// Cache this so we don't need to keep checking this file
				CachedMacProjectArchitectures.Add(TargetName, TargetArchitectures);
			}

			return CachedMacProjectArchitectures[TargetName];
		}

	}

	/// <summary>
	/// Info needed to make a file a member of specific group
	/// </summary>
	class XcodeSourceFile : ProjectFile.SourceFile
	{
		/// <summary>
		/// Constructor
		/// </summary>
		public XcodeSourceFile(FileReference InitFilePath, DirectoryReference? InitRelativeBaseFolder)
			: base(InitFilePath, InitRelativeBaseFolder)
		{
			FileGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			FileRefGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
		}

		/// <summary>
		/// File Guid for use in Xcode project
		/// </summary>
		public string FileGuid
		{
			get;
			private set;
		}

		public void ReplaceGuids(string NewFileGuid, string NewFileRefGuid)
		{
			FileGuid = NewFileGuid;
			FileRefGuid = NewFileRefGuid;
		}

		/// <summary>
		/// File reference Guid for use in Xcode project
		/// </summary>
		public string FileRefGuid
		{
			get;
			private set;
		}
	}

	/// <summary>
	/// Represents a group of files shown in Xcode's project navigator as a folder
	/// </summary>
	internal class XcodeFileGroup
	{
		public XcodeFileGroup(string InName, string InPath, bool InIsReference)
		{
			GroupName = InName;
			GroupPath = InPath;
			GroupGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			bIsReference = InIsReference;
		}

		public string GroupGuid;
		public string GroupName;
		public string GroupPath;
		public Dictionary<string, XcodeFileGroup> Children = new Dictionary<string, XcodeFileGroup>();
		public List<XcodeSourceFile> Files = new List<XcodeSourceFile>();
		public bool bIsReference;
	}

	class UnrealExtensionInfo
	{
		public UnrealExtensionInfo(string InName)
		{
			Name = InName;
			TargetDependencyGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			TargetProxyGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			TargetGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			ProductGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			ResourceBuildPhaseGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			ConfigListGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
			AllConfigs = new Dictionary<string, UnrealBuildConfig>();
		}

		public string Name;
		public string TargetDependencyGuid;
		public string TargetProxyGuid;
		public string TargetGuid;
		public string ProductGuid;
		public string ResourceBuildPhaseGuid;
		public string ConfigListGuid;
		public Dictionary<string, UnrealBuildConfig> AllConfigs;

		public string? ConfigurationContents;
	}

	class XcconfigFile
	{
		public string Name;
		public string Guid;
		public FileReference FileRef;
		internal StringBuilder Text;

		public XcconfigFile(DirectoryReference XcodeProjectDirectory, string ConfigName)
		{
			Name = ConfigName;
			FileRef = FileReference.Combine(XcodeProjectDirectory, "Xcconfigs", $"{ConfigName}.xcconfig");
			Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
			Text = new StringBuilder();
		}

		public void AppendLine(string Line)
		{
			Text.Append(Line);
			Text.Append(ProjectFileGenerator.NewLine);
		}

		public void Write()
		{
			// write the file to disk
			DirectoryReference.CreateDirectory(FileRef.Directory);
			FileReference.WriteAllTextIfDifferent(FileRef, Text.ToString());
		}
	}




	abstract class XcodeProjectNode
	{
		// keeps a list of other node this node references, which is used when writing out the whole xcode project file
		public List<XcodeProjectNode> References = new();

		// optional Xcconfig file 
		public XcconfigFile? Xcconfig = null;

		/// <summary>
		/// Abstract function the individual node classes must override to write out the node to the project file
		/// </summary>
		/// <param name="Content"></param>
		public abstract void Write(StringBuilder Content);


		/// <summary>
		/// Walks the references of the given node to find all nodes of the given type. 
		/// </summary>
		/// <typeparam name="T">Parent class of the nodes to return</typeparam>
		/// <param name="Node">Root node to start with</param>
		/// <returns>Set of matching nodes</returns>
		public static IEnumerable<T> GetNodesOfType<T>(XcodeProjectNode Node) where T : XcodeProjectNode
		{
			// gather the nodes without recursion
			LinkedList<XcodeProjectNode> Nodes = new();
			Nodes.AddLast(Node);

			// pull off the front of the "deque" amd add its references to the back, gather
			List<XcodeProjectNode> Return = new();
			while (Nodes.Count() > 0)
			{
				XcodeProjectNode Head = Nodes.First();
				Nodes.RemoveFirst();
				Head.References.ForEach(x => Nodes.AddLast(x));

				// remember them all 
				Return.AddRange(Head.References);
			}

			// filter down
			return Return.OfType<T>();
		}


		public void CreateXcconfigFile(XcodeProject Project, string Name)
		{
			Xcconfig = new XcconfigFile(Project.UnrealData.XcodeProjectFileLocation!.Directory, Name);
			Project.FileCollection.AddFileReference(Xcconfig.Guid, $"Xcconfigs/{Xcconfig.FileRef.GetFileName()}", "test.xcconfig", "\"<group>\"", "Xcconfigs");
		}

		public virtual void WriteXcconfigFile()
		{
			
		}


		/// <summary>
		/// THhis will walk the node reference tree and call WRite on each node to add all needed nodes to the xcode poject file
		/// </summary>
		/// <param name="Content"></param>
		/// <param name="Node"></param>
		public static void WriteNodeAndReferences(StringBuilder Content, XcodeProjectNode Node)
		{
			// write the node into the xcode project file
			Node.Write(Content);
			Node.WriteXcconfigFile();

			foreach (XcodeProjectNode Reference in Node.References)
			{
				WriteNodeAndReferences(Content, Reference);
			}	
		}
	}


	class XcodeDependency : XcodeProjectNode
	{
		public XcodeTarget Target;
		public string Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
		public string ProxyGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
		public string ProjectGuid;


		public XcodeDependency(XcodeTarget Target, string ProjectGuid)
		{
			this.Target = Target;
			this.ProjectGuid = ProjectGuid;

			References.Add(Target);
		}

		public override void Write(StringBuilder Content)
		{
			Content.WriteLine("/* Begin PBXContainerItemProxy section */");
			Content.WriteLine($"\t\t{ProxyGuid} /* PBXContainerItemProxy */ = {{");
			Content.WriteLine("\t\t\tisa = PBXContainerItemProxy;");
			Content.WriteLine($"\t\t\tcontainerPortal = {ProjectGuid} /* Project object */;");
			Content.WriteLine("\t\t\tproxyType = 1;");
			Content.WriteLine($"\t\t\tremoteGlobalIDString = {Target.Guid};");
			Content.WriteLine($"\t\t\tremoteInfo = \"{Target.Name}\";");
			Content.WriteLine("\t\t};");
			Content.WriteLine("/* End PBXContainerItemProxy section */");
			Content.WriteLine("");

			Content.WriteLine("/* Begin PBXTargetDependency section */");
			Content.WriteLine($"\t\t{Guid} /* PBXTargetDependency */ = {{");
			Content.WriteLine("\t\t\tisa = PBXTargetDependency;");
			Content.WriteLine($"\t\t\ttarget = {Target.Guid} /* {Target.Name} */;");
			Content.WriteLine($"\t\t\ttargetProxy = {ProxyGuid} /* PBXContainerItemProxy */;");
			Content.WriteLine("\t\t};");
			Content.WriteLine("/* End PBXTargetDependency section */");
		}
	}

	class XcodeBuildPhase : XcodeProjectNode
	{
		public string Name;
		public string Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
		private List<XcodeSourceFile> Items = new();

		public XcodeBuildPhase(string Name)
		{
			this.Name = Name;
		}

		public void AddFile(XcodeSourceFile File)
		{
			Items.Add(File);
		}

		public override void Write(StringBuilder Content)
		{
			Content.WriteLine("/* Begin PBXSourcesBuildPhase section */");
			Content.WriteLine($"\t\t{Guid} = {{");
			Content.WriteLine("\t\t\tisa = PBXSourcesBuildPhase;");
			Content.WriteLine("\t\t\tbuildActionMask = 2147483647;");
			Content.WriteLine("\t\t\tfiles = (");
			foreach (XcodeSourceFile File in Items)
			{
				Content.WriteLine($"\t\t\t\t{File.FileGuid} /* {File.Reference.GetFileName()} in {Name} */,");
			}
			Content.WriteLine("\t\t\t);");
			Content.WriteLine("\t\t\trunOnlyForDeploymentPostprocessing = 0;");
			Content.WriteLine("\t\t};");
			Content.WriteLine("/* End PBXSourcesBuildPhase section */");
		}
	}

	class XcodeBuildConfig : XcodeProjectNode
	{
		public string Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
		public UnrealBuildConfig Info;

		public XcodeBuildConfig(UnrealBuildConfig Info)
		{
			this.Info = Info;
		}

		public override void Write(StringBuilder Content)
		{
			Content.WriteLine(2, $"{Guid} /* {Info.DisplayName} */ = {{");
			Content.WriteLine(3,	"isa = XCBuildConfiguration;");
			if (Xcconfig != null)
			{
				Content.WriteLine(3, $"baseConfigurationReference = {Xcconfig.Guid} /* {Xcconfig.Name}.xcconfig */;");
			}
			Content.WriteLine(3,	"buildSettings = {");
			Content.WriteLine(3,	"};");
			Content.WriteLine(3,	$"name = \"{Info.DisplayName}\";");
			Content.WriteLine(2, "};");
		}
	}
	
	class XcodeBuildConfigList : XcodeProjectNode
	{
		public string Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
		public string TargetName;

		public List<XcodeBuildConfig> BuildConfigs = new();

		public XcodeBuildConfigList(string TargetName, List<UnrealBuildConfig> BuildConfigInfos)
		{
			if (BuildConfigInfos.Count == 0)
			{
				throw new BuildException("Created a XcodeBuildConfigList with no BuildConfigs. This likely means a target was created too early");
			}

			this.TargetName = TargetName;

			// create build config objects for each info passed in, and them as references
			BuildConfigs = BuildConfigInfos.Select(x => new XcodeBuildConfig(x)).ToList();
			References.AddRange(BuildConfigs);
		}

		public override void Write(StringBuilder Content)
		{
			// figure out the default configuration to use
			string Default = BuildConfigs.Any(x => x.Info.DisplayName.Contains(" Editor")) ? "Development Editor" : "Development";

			Content.WriteLine(2, $"{Guid} /* Build configuration list for target {TargetName} */ = {{");
			Content.WriteLine(3,	"isa = XCConfigurationList;");
			Content.WriteLine(3,	"buildConfigurations = (");
			foreach (XcodeBuildConfig Config in BuildConfigs)
			{
				Content.WriteLine(4,		$"{Config.Guid} /* {Config.Info.DisplayName} */,");
			}
			Content.WriteLine(3,	");");
			Content.WriteLine(3,	"defaultConfigurationIsVisible = 0;");
			Content.WriteLine(3,	$"defaultConfigurationName = \"{Default}\";");
			Content.WriteLine(2, "};");
		}
	}

	class XcodeTarget : XcodeProjectNode
	{
		public enum Type
		{
			Run_App,
			Run_Tool,
			Build,
			Index,
		}

		// Guid for this target
		public string Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
		string TargetAppGuid = XcodeProjectFileGenerator.MakeXcodeGuid();

		// com.apple.product-type.application, etc
		string ProductType;

		// xcode target type name
		string TargetTypeName;
		Type TargetType;

		// UE5_Build, EngineTest_SubIndex1, etc
		public string Name;

		// list of build configs this target supports (for instance, the Index target only indexes a Development config) 
		public XcodeBuildConfigList? BuildConfigList;

		// dependencies for this target
		public List<XcodeDependency> Dependencies = new List<XcodeDependency>();

		// build phases for this target (source, resource copying, etc)
		public List<XcodeBuildPhase> BuildPhases = new List<XcodeBuildPhase>();

		private FileReference? GameProject;

		public XcodeTarget(Type Type, UnrealData UnrealData, string? OverrideName=null)
		{
			GameProject = UnrealData.UProjectFileLocation;

			string ConfigName;
			TargetType = Type;
			switch (Type)
			{
				case Type.Run_App:
					ProductType = "com.apple.product-type.application";
					TargetTypeName = "PBXNativeTarget";
					ConfigName = "Run";
					break;
				case Type.Run_Tool:
					ProductType = "com.apple.product-type.tool";
					TargetTypeName = "PBXNativeTarget";
					ConfigName = "Run";
					break;
				case Type.Build:
					ProductType = "com.apple.product-type.library.static";
					TargetTypeName = "PBXLegacyTarget";
					ConfigName = "Build";
					break;
				case Type.Index:
					ProductType = "com.apple.product-type.library.static";
					TargetTypeName = "PBXNativeTarget";
					ConfigName = "Index";
					break;
				default:
					throw new BuildException($"Unhandled target type {Type}");
			}

			// set up names
			ConfigName = (OverrideName == null) ? ConfigName : OverrideName;
			Name = $"{UnrealData.ProductName}_{ConfigName}";
		}

		public void AddDependency(XcodeTarget Target, XcodeProject Project)
		{
			XcodeDependency Dependency = new XcodeDependency(Target, Project.Guid);
			Dependencies.Add(Dependency);
			References.Add(Dependency);
		}

		public override void Write(StringBuilder Content)
		{
			Content.WriteLine($"/* Begin {TargetType} section */");

			Content.WriteLine(2, $"{Guid} /* {Name} */ = {{");
			Content.WriteLine(3,	$"isa = {TargetTypeName};");
				
			Content.WriteLine(3,	$"buildConfigurationList = {BuildConfigList!.Guid} /* Build configuration list for {TargetTypeName} \"{Name}\" */;");

			if (TargetType == Type.Build)
			{
				// get paths to Unreal bits to be able ro tun UBT
				string UProjectParam = GameProject == null ? "" : $"{GameProject.FullName.Replace(" ", "\\ ")}";
				string UEDir = XcodeFileCollection.ConvertPath(Path.GetFullPath(Directory.GetCurrentDirectory() + "../../.."));
				string BuildToolPath = UEDir + "/Engine/Build/BatchFiles/Mac/XcodeBuild.sh";

				// insert elements to call UBT when building
				Content.WriteLine(3,	$"buildArgumentsString = \"$(ACTION) $(UE_BUILD_TARGET_NAME) $(PLATFORM_NAME) $(UE_BUILD_TARGET_CONFIG) {UProjectParam}\";");
				Content.WriteLine(3,	$"buildToolPath = \"{BuildToolPath}\";");
				Content.WriteLine(3,	$"buildWorkingDirectory = \"{UEDir}\";");
			}
			Content.WriteLine(3,	"buildPhases = (");
			foreach (XcodeBuildPhase BuildPhase in BuildPhases)
			{
				Content.WriteLine(4,		$"{BuildPhase.Guid} /* {BuildPhase.Name} */,");
			}
			Content.WriteLine(3,	");");
			Content.WriteLine(3,	"dependencies = (");
			foreach (XcodeDependency Dependency in Dependencies)
			{
				Content.WriteLine(4,		$"{Dependency.Guid} /* {Dependency.Target.Name} */,");
			}
			Content.WriteLine(3,	");");
			Content.WriteLine(3,	$"name = \"{Name}\";");
			Content.WriteLine(3,	"passBuildSettingsInEnvironment = 1;");
			Content.WriteLine(3,	$"productType = \"{ProductType}\";");
			WriteExtraTargetProperties(Content);
			Content.WriteLine(2, "};");

			Content.WriteLine($"/* End {TargetType} section */");
		}

		/// <summary>
		/// Let subclasses add extra properties into this target section
		/// </summary>
		protected virtual void WriteExtraTargetProperties(StringBuilder Content)
		{
			// nothing by default
		}
	}

	class XcodeRunTarget : XcodeTarget
	{
		private string ProductGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
		private string ProductName;

		public XcodeRunTarget(XcodeProject Project)
			: base(Project.UnrealData.bIsAppBundle ? XcodeTarget.Type.Run_App : XcodeTarget.Type.Run_Tool, Project.UnrealData)
		{
			BuildConfigList = new XcodeBuildConfigList(Name, Project.UnrealData.AllConfigs);
			References.Add(BuildConfigList);

			// add the Product item to the project to be visible in left pane
			ProductName = Project.UnrealData.ProductName;
			Project.FileCollection.AddFileReference(ProductGuid, ProductName, Project.UnrealData.bIsAppBundle ? "wrapper.application" : "\"compiled.mach-o.executable\"", "BUILT_PRODUCTS_DIR", "Products");


			// if we are run-only, then skip some stuff
			if (!XcodeProjectFileGenerator.bGeneratingRunIOSProject)
			{
				// create a biuld target only if we have source files to build
				if (Project.UnrealData.BatchedFiles.Count != 0)
				{
					XcodeBuildTarget BuildTarget = new XcodeBuildTarget(Project.UnrealData);
					AddDependency(BuildTarget, Project);
				}
			}

			CreateXcconfigFile(Project, Name);

			// hook up each buildconfig to this Xcconfig 
			BuildConfigList!.BuildConfigs.ForEach(x => x.Xcconfig = Xcconfig);
		}

		protected override void WriteExtraTargetProperties(StringBuilder Content)
		{
			Content.WriteLine($"\t\t\tproductReference = {ProductGuid};");
			Content.WriteLine($"\t\t\tproductName = \"{ProductName}\";");
		}

		public override void WriteXcconfigFile()
		{
			// also write to the Xcconfig file
			Xcconfig!.AppendLine("GENERATE_INFOPLIST_FILE[sdk=macosx*] = YES // Xcode 14 code-signing fix for development");

			// #jira UE-143619: Pre Monterey macOS requires this option for a packaged app to run on iOS15 due to new code signature format. Could be removed once Monterey is miniuS.
			Xcconfig.AppendLine("OTHER_CODE_SIGN_FLAGS = --generate-entitlement-der");

			Xcconfig.AppendLine($"MACOSX_DEPLOYMENT_TARGET = {MacToolChain.Settings.MacOSVersion};");
			Xcconfig.AppendLine("INFOPLIST_OUTPUT_FORMAT = xml");
			Xcconfig.AppendLine("COMBINE_HIDPI_IMAGES = YES");

			Xcconfig.Write();
		}
	}

	class XcodeBuildTarget : XcodeTarget
	{
		public XcodeBuildTarget(UnrealData UnrealData)
			: base(XcodeTarget.Type.Build, UnrealData)
		{
			BuildConfigList = new XcodeBuildConfigList(Name, UnrealData.AllConfigs);
			References.Add(BuildConfigList);
		}
	}

	class XcodeIndexTarget : XcodeTarget
	{
		private UnrealBatchedFiles? SoloTargetBatch;

		// just take the Project since it has everything we need, and is needed when adding target dependencies
		public XcodeIndexTarget(XcodeProject Project)
			: base(XcodeTarget.Type.Index, Project.UnrealData)
		{
			// do we have an editor? if so, use this Development Editor as the config to index, otherwise, use Development
			string IndexConfig = Project.UnrealData.AllConfigs.Any(x => x.DisplayName == "Development Editor") ? "Development Editor" : "Development";
			BuildConfigList = new XcodeBuildConfigList(Name, Project.UnrealData.AllConfigs.Where(x => x.DisplayName == IndexConfig).ToList());
			References.Add(BuildConfigList);

			CreateXcconfigFile(Project, Name);
			// hook up each buildconfig to this Xcconfig 
			BuildConfigList!.BuildConfigs.ForEach(x => x.Xcconfig = Xcconfig);


			// now look to see if all files are buildable with one batch, in which case we don't need subtargets, or if we have multiple batches, then 
			// make a subtarget for each batch of unique build settings
			if (Project.UnrealData.BatchedFiles.Count == 1)
			{
				SoloTargetBatch = Project.UnrealData.BatchedFiles[0];

				XcodeBuildPhase BuildPhase = new XcodeBuildPhase("Sources");
				BuildPhases.Add(BuildPhase);
				References.Add(BuildPhase);

				foreach (XcodeSourceFile File in Project.FileCollection.BuildableFiles)
				{
					BuildPhase.AddFile(File);
				}
			}
			else
			{
				// find the config infos this target is set to use, and copy those in to the subtargets
				List<UnrealBuildConfig> Configs = BuildConfigList.BuildConfigs.Select(x => x.Info).ToList();

				for (int Index = 0; Index < Project.UnrealData.BatchedFiles.Count; Index++)
				{
					XcodeIndexSubTarget SubTarget = new XcodeIndexSubTarget(Project, Index, Configs);
					AddDependency(SubTarget, Project);
				}
			}
		}

		public override void WriteXcconfigFile()
		{
			// write out settings that apply whether or not we have subtargets, which #include this one, or no subtargets, and we write out more
			// @todo move tis to the subtarget and remember it from the Module
			Xcconfig!.AppendLine("CLANG_CXX_LANGUAGE_STANDARD = c++17");
			Xcconfig.AppendLine("GCC_WARN_CHECK_SWITCH_STATEMENTS = NO");
			Xcconfig.AppendLine("GCC_PRECOMPILE_PREFIX_HEADER = YES");
			Xcconfig.AppendLine("GCC_OPTIMIZATION_LEVEL = 0");

			// if we have folded a file batch into this main target, write out the settings into this Xcconfig
			if (SoloTargetBatch != null)
			{
				// ask the single sub target to write out the contents of our Xcconfig file since we are folding them up into this target
				SoloTargetBatch.WriteXcconfigSettings(Xcconfig.Text);
			}

			Xcconfig.Write();
		}
	}

	class XcodeIndexSubTarget : XcodeTarget
	{
		public string TargetGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
		public string BuildPhaseGuid = XcodeProjectFileGenerator.MakeXcodeGuid();
		public string ConfigListGuid = XcodeProjectFileGenerator.MakeXcodeGuid();

		private UnrealBatchedFiles BatchedFiles;

		public XcodeIndexSubTarget(XcodeProject Project, int SubTargetIndex, List<UnrealBuildConfig> Configs)
			: base(Type.Index, Project.UnrealData, $"SubIndex{SubTargetIndex}")
		{
			// get the settings and list of files for this subtarget
			BatchedFiles = Project.UnrealData.BatchedFiles[SubTargetIndex];

			// set the buildconfig list in the SubTarget
			BuildConfigList = new XcodeBuildConfigList(Name, Configs);
			References.Add(BuildConfigList);

			CreateXcconfigFile(Project, Name);
			// hook up each buildconfig to this Xcconfig 
			BuildConfigList!.BuildConfigs.ForEach(x => x.Xcconfig = Xcconfig);

			// create the build phase for this target for all files in the batch
			XcodeBuildPhase BuildPhase = new XcodeBuildPhase("Sources");
			BuildPhases.Add(BuildPhase);
			References.Add(BuildPhase);

			// and add each file to it
			foreach (XcodeSourceFile File in BatchedFiles.Files)
			{
				BuildPhases[0].AddFile(File);
			}
		}

		public override void WriteXcconfigFile()
		{
			// include the share Index config
			Xcconfig!.AppendLine($"#include \"{Name.Split('_')[0]}_Index.xcconfig\"");

			// then right the build settings from the modules we are batched together
			BatchedFiles.WriteXcconfigSettings(Xcconfig.Text);

			Xcconfig.Write();
		}
	}

	class XcodeProject : XcodeProjectNode
	{
		// the blob of data coming from unreal that we can pass around
		public UnrealData UnrealData;

		// container for all files and groups
		public XcodeFileCollection FileCollection;

		// Guid for the project node
		public string Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
		private string ProvisioningStyle;

		private XcodeRunTarget RunTarget;

		public XcodeBuildConfigList ProjectBuildConfigs;

		public XcodeProject(UnrealData UnrealData, XcodeFileCollection FileCollection)
		{
			this.UnrealData = UnrealData;
			this.FileCollection = FileCollection;

			ProvisioningStyle = UnrealData.bUseAutomaticSigning ? "Automatic" : "Manual";
			RunTarget = new XcodeRunTarget(this);
			References.Add(RunTarget);

			ProjectBuildConfigs = new XcodeBuildConfigList(UnrealData.ProductName, UnrealData.AllConfigs);
			References.Add(ProjectBuildConfigs);

			// create the Projet xcconfig
			CreateXcconfigFile(this, $"{UnrealData.ProductName}_Project");

			// create per-config Xcconfig files
			foreach (XcodeBuildConfig Config in ProjectBuildConfigs.BuildConfigs)
			{
				Config.CreateXcconfigFile(this, $"{UnrealData.ProductName}_{Config.Info.DisplayName.Replace(" ", "")}");
			}


			// make an indexing target if we aren't just a run-only project, and it has buildable source files
			if (!XcodeProjectFileGenerator.bGeneratingRunIOSProject && UnrealData.BatchedFiles.Count != 0)
			{				
				// index isn't a dependency of run, it's simply a target that xcode will find to index from
				XcodeIndexTarget IndexTarget = new XcodeIndexTarget(this);
				References.Add(IndexTarget);
			}
		}


		public override void Write(StringBuilder Content)
		{
			Content.WriteLine("/* Begin PBXProject section */");

			Content.WriteLine(2, $"{Guid} /* Project object */ = {{");
			Content.WriteLine(3,	"isa = PBXProject;");
			Content.WriteLine(3,	"attributes = {");
			Content.WriteLine(4,		"LastUpgradeCheck = 2000;");
			Content.WriteLine(4,		"ORGANIZATIONNAME = \"Epic Games, Inc.\";");
			Content.WriteLine(4,		"TargetAttributes = {");
			Content.WriteLine(5,			$"{RunTarget.Guid} = {{");
			Content.WriteLine(6,				$"ProvisioningStyle = {ProvisioningStyle};");
			Content.WriteLine(5,			"};");
			Content.WriteLine(4,		"};");
			Content.WriteLine(3,	"};");
			Content.WriteLine(3,	$"buildConfigurationList = {ProjectBuildConfigs.Guid} /* Build configuration list for PBXProject \"{ProjectBuildConfigs.TargetName}\" */;");
			Content.WriteLine(3,	"compatibilityVersion = \"Xcode 8.0\";");
			Content.WriteLine(3,	"developmentRegion = English;");
			Content.WriteLine(3,	"hasScannedForEncodings = 0;");
			Content.WriteLine(3,	"knownRegions = (");
			Content.WriteLine(4,		"en");
			Content.WriteLine(3,	");");
			Content.WriteLine(3,	$"mainGroup = {FileCollection.MainGroupGuid};");
			Content.WriteLine(3,	$"productRefGroup = {FileCollection.GetProductGroupGuid()};");
			Content.WriteLine(3,	"projectDirPath = \"\";");
			Content.WriteLine(3,	"projectRoot = \"\";");
			Content.WriteLine(3,	"targets = (");
			foreach (XcodeTarget Target in XcodeProjectNode.GetNodesOfType<XcodeTarget>(this))
			{
				Content.WriteLine(4, $"{Target.Guid} /* {Target.Name} */,");
			}
			Content.WriteLine(3, ");");
			Content.WriteLine(2, "};");

			Content.WriteLine("/* End PBXProject section */");
		}


		public override void WriteXcconfigFile()
		{
			string UEDir = XcodeFileCollection.ConvertPath(Path.GetFullPath(Directory.GetCurrentDirectory() + "../../.."));
			string SupportedIOSArchitectures = string.Join(" ", UnrealData.SupportedIOSArchitectures);
			string? IOSRunTimeVersion = null;
			string? TVOSRunTimeVersion = null;

			// shortcut for mac only
			string? IOSRunTimeDevices = null;
			string? TVOSRunTimeDevices = null;

			bool bAutomaticSigning = false;
			string? UUID_IOS = "";
			string? UUID_TVOS = "";
			string? TEAM_IOS = "";
			string? TEAM_TVOS = "";
			string? IOS_CERT = "iPhone Developer";
			string? TVOS_CERT = "iPhone Developer";
			string IOS_BUNDLE = "";
			string TVOS_BUNDLE = "";

			if (UnrealData.IOSProjectSettings != null)
			{
				IOSRunTimeVersion = UnrealData.IOSProjectSettings.RuntimeVersion;
				IOSRunTimeDevices = UnrealData.IOSProjectSettings.RuntimeDevices;
				bAutomaticSigning = UnrealData.IOSProjectSettings.bAutomaticSigning;
				if (!bAutomaticSigning)
				{
					UUID_IOS = UnrealData.IOSProvisioningData!.MobileProvisionUUID;
					IOS_CERT = UnrealData.IOSProvisioningData!.SigningCertificate;
				}
				TEAM_IOS = UnrealData.IOSProvisioningData!.TeamUUID;
				IOS_BUNDLE = UnrealData.IOSProjectSettings.BundleIdentifier;
			}

			if (UnrealData.TVOSProjectSettings != null)
			{
				TVOSRunTimeVersion = UnrealData.TVOSProjectSettings.RuntimeVersion;
				TVOSRunTimeDevices = UnrealData.TVOSProjectSettings.RuntimeDevices;
				if (!bAutomaticSigning)
				{
					UUID_TVOS = UnrealData.TVOSProvisioningData!.MobileProvisionUUID;
					TVOS_CERT = UnrealData.TVOSProvisioningData!.SigningCertificate;
				}
				TEAM_TVOS = UnrealData.TVOSProvisioningData!.TeamUUID;
				TVOS_BUNDLE = UnrealData.TVOSProjectSettings.BundleIdentifier;
			}

			//#jira UE-50382 Xcode Address Sanitizer feature does not work on iOS
			// address sanitizer dylib loader depends on the SDKROOT parameter. For macosx or default (missing, translated as macosx), the path is incorrect for iphone/appletv
			Xcconfig!.AppendLine($"SDKROOT[sdk=macosx*] = macosx");
			Xcconfig.AppendLine($"SDKROOT[sdk=iphone*] = iphoneos");
			Xcconfig.AppendLine($"SDKROOT[sdk=appletvos*] = appletvos");
			Xcconfig.AppendLine("USE_HEADERMAP = NO");
			Xcconfig.AppendLine("ONLY_ACTIVE_ARCH = YES");

			if (bAutomaticSigning && UnrealData.bWriteCodeSigningSettings)
			{
				Xcconfig.AppendLine("CODE_SIGN_STYLE = Automatic");
			}

			if (IOSRunTimeVersion != null)
			{
				Xcconfig.AppendLine($"VALID_ARCHS[sdk=iphone*] = {SupportedIOSArchitectures}");
				Xcconfig.AppendLine($"IPHONEOS_DEPLOYMENT_TARGET = {IOSRunTimeVersion}");
				Xcconfig.AppendLine($"TARGETED_DEVICE_FAMILY[sdk=iphone*] = {IOSRunTimeDevices}");
				if (UnrealData.bWriteCodeSigningSettings)
				{
					if (!string.IsNullOrEmpty(TEAM_IOS))
					{
						Xcconfig.AppendLine($"DEVELOPMENT_TEAM[sdk=iphone*] = {TEAM_IOS}");
					}
					Xcconfig.AppendLine($"CODE_SIGN_IDENTITY[sdk=iphone*] = {IOS_CERT}");
					if (!bAutomaticSigning && !string.IsNullOrEmpty(UUID_IOS))
					{
						Xcconfig.AppendLine($"PROVISIONING_PROFILE_SPECIFIER[sdk=iphone*] = {UUID_IOS}");
					}
				}
				if (UnrealData.UProjectFileLocation != null)
				{
					Xcconfig.AppendLine($"PRODUCT_BUNDLE_IDENTIFIER[sdk=iphone*] = {IOS_BUNDLE}");
				}
			}
			if (TVOSRunTimeVersion != null)
			{
				Xcconfig.AppendLine($"VALID_ARCHS[sdk=appletvos*] = {SupportedIOSArchitectures}");
				Xcconfig.AppendLine($"TVOS_DEPLOYMENT_TARGET = {TVOSRunTimeVersion}");
				Xcconfig.AppendLine($"TARGETED_DEVICE_FAMILY[sdk=appletvos*] = {TVOSRunTimeDevices}");
				if (UnrealData.bWriteCodeSigningSettings)
				{
					if (!string.IsNullOrEmpty(TEAM_TVOS))
					{
						Xcconfig.AppendLine($"DEVELOPMENT_TEAM[sdk=iphone*] = {TEAM_TVOS}");
					}
					Xcconfig.AppendLine($"CODE_SIGN_IDENTITY[sdk=appletvos*] = {TVOS_CERT}");
					if (!bAutomaticSigning && !string.IsNullOrEmpty(UUID_TVOS))
					{
						Xcconfig.AppendLine($"PROVISIONING_PROFILE_SPECIFIER[sdk=appletvos*] = {UUID_TVOS}");
					}
				}
				if (UnrealData.UProjectFileLocation != null)
				{
					Xcconfig.AppendLine($"PRODUCT_BUNDLE_IDENTIFIER[sdk=appletvos*] = {TVOS_BUNDLE}");
				}
			}

			Xcconfig.Write();

			// Now for each config write out the specific settings

			DirectoryReference? GameDir = UnrealData.UProjectFileLocation?.Directory;
			string? GamePath = GameDir != null ? XcodeFileCollection.ConvertPath(GameDir.FullName) : null;

			// Get Mac architectures supported by this project
			foreach (UnrealBuildConfig Config in UnrealData.AllConfigs)
			{
				// hook up the Buildconfig that matches this info to this xcconfig file
				XcconfigFile ConfigXcconfig = ProjectBuildConfigs!.BuildConfigs.First(x => x.Info == Config).Xcconfig!;

				ConfigXcconfig.AppendLine("// pull in the shared settings for all configs");
				ConfigXcconfig.AppendLine($"#include \"{UnrealData.ProductName}_Project.xcconfig\"");
				ConfigXcconfig.AppendLine("");

				bool bIsUnrealGame = Config.BuildTarget.Equals("UnrealGame", StringComparison.InvariantCultureIgnoreCase);
				bool bIsUnrealClient = Config.BuildTarget.Equals("UnrealClient", StringComparison.InvariantCultureIgnoreCase);

				// Setup Mac stuff
				FileReference MacExecutablePath = Config.MacExecutablePath!;
				string MacExecutableDir = XcodeFileCollection.ConvertPath(MacExecutablePath.Directory.FullName);
				string MacExecutableFileName = MacExecutablePath.GetFileName();
				string SupportedMacArchitectures = string.Join(" ", UnrealData.GetSupportedMacArchitectures(Config, UnrealData.UProjectFileLocation));

				// figure out the directory that contains the Binaries and Intermediate directories
				string ProjectRootDir = (bIsUnrealGame || bIsUnrealClient || GamePath == null) ? $"{UEDir}/Engine" : GamePath;

				// UnrealClient re-uses UnrealGame
				string PlistTargetName = bIsUnrealClient ? "UnrealGame" : Config.BuildTarget;
				string MacInfoPlistPath = $"{ProjectRootDir}/Intermediate/Mac/{MacExecutableFileName}-Info.plist";
				string IOSInfoPlistPath = $"{ProjectRootDir}/Intermediate/IOS/{PlistTargetName}-Info.plist";
				string TVOSInfoPlistPath = $"{ProjectRootDir}/Intermediate/TVOS/{PlistTargetName}-Info.plist";

				// @todo is really necessary to only set entitlements in the non-UnrealGame, project case? what about mac entitlements?
				bool bSetEntitlements = !bIsUnrealGame && !bIsUnrealClient && UnrealData.UProjectFileLocation != null;

				string SupportedPlatforms = "";
				if (Config.ProjectTarget!.TargetRules != null)
				{
					if (Config.bSupportsIOS)
					{
						SupportedPlatforms += "iphoneos iphonesimulator ";
					}
					if (Config.bSupportsTVOS)
					{
						SupportedPlatforms += "appletvos ";
					}
					if (Config.bSupportsMac)
					{
						SupportedPlatforms += "macosx ";
					}
				}
				else
				{
					// @todo when does this case happen?
					SupportedPlatforms = "macosx";
				}

				// debug settings
				if (Config.BuildConfig == UnrealTargetConfiguration.Debug)
				{
					ConfigXcconfig.AppendLine("ENABLE_TESTABILITY = YES");
				}

				ConfigXcconfig.AppendLine($"UE_BUILD_TARGET_NAME = {Config.BuildTarget}");
				ConfigXcconfig.AppendLine($"UE_BUILD_TARGET_CONFIG = {Config.BuildConfig}");

				// list the supported platforms, which will narrow down what other settings are active
				ConfigXcconfig.AppendLine($"SUPPORTED_PLATFORMS = {SupportedPlatforms}");

				// @otodo move VALID_ARCHS up to Project config once we are always universal
				if (Config.bSupportsMac)
				{
					ConfigXcconfig.AppendLine("");
					ConfigXcconfig.AppendLine("// Mac setup");
					ConfigXcconfig.AppendLine($"VALID_ARCHS[sdk=macosx*] = {SupportedMacArchitectures}");
					ConfigXcconfig.AppendLine($"PRODUCT_NAME[sdk=macosx*] = {MacExecutableFileName}");
					ConfigXcconfig.AppendLine($"CONFIGURATION_BUILD_DIR[sdk=macosx*] = {MacExecutableDir}");
					ConfigXcconfig.AppendLine($"INFOPLIST_FILE[sdk=macosx*] = {MacInfoPlistPath}");
				}

				if (Config.bSupportsIOS)
				{
					ConfigXcconfig.AppendLine("");
					ConfigXcconfig.AppendLine("// IOS setup");
					ConfigXcconfig.AppendLine($"PRODUCT_NAME[sdk=iphone*] = {Config.BuildTarget}"); // @todo: change to Path.GetFileName(Config.IOSExecutablePath) when we stop using payload
					ConfigXcconfig.AppendLine($"CONFIGURATION_BUILD_DIR[sdk=iphone*] = {ProjectRootDir}/Binaries/IOS/Payload");
					ConfigXcconfig.AppendLine($"INFOPLIST_FILE[sdk=iphone*] = {IOSInfoPlistPath}");
					if (bSetEntitlements)
					{
						ConfigXcconfig.AppendLine($"CODE_SIGN_ENTITLEMENTS[sdk=iphone*] = {ProjectRootDir}/Intermediate/IOS/{PlistTargetName}.entitlements");
					}
				}
				if (Config.bSupportsTVOS)
				{
					ConfigXcconfig.AppendLine("");
					ConfigXcconfig.AppendLine("// TVOS setup");
					ConfigXcconfig.AppendLine($"PRODUCT_NAME[sdk=appletvos*] = {Config.BuildTarget}"); // @todo: change to Path.GetFileName(Config.IOSExecutablePath) when we stop using payload
					ConfigXcconfig.AppendLine($"CONFIGURATION_BUILD_DIR[sdk=appletvos*] = {ProjectRootDir}/Binaries/TVOS/Payload");
					ConfigXcconfig.AppendLine($"INFOPLIST_FILE[sdk=appletvos*] = {TVOSInfoPlistPath}");
					if (bSetEntitlements)
					{
						ConfigXcconfig.AppendLine($"CODE_SIGN_ENTITLEMENTS[sdk=appletvos*] = {ProjectRootDir}/Intermediate/TVOS/{PlistTargetName}.entitlements");
					}
				}


				// @todo can we remove this and use GENERATE_INFOPLIST_FILE when plist doesn't exist?

				// Prepare a temp Info.plist file so Xcode has some basic info about the target immediately after opening the project.
				// This is needed for the target to pass the settings validation before code signing. UBT will overwrite this plist file later, with proper contents.
				if (BuildHostPlatform.Current.Platform == UnrealTargetPlatform.Mac)
				{
					bool bCreateMacInfoPlist = !File.Exists(MacInfoPlistPath);
					bool bCreateIOSInfoPlist = !File.Exists(IOSInfoPlistPath) && IOSRunTimeVersion != null;
					bool bCreateTVOSInfoPlist = !File.Exists(TVOSInfoPlistPath) && TVOSRunTimeVersion != null;
					if (bCreateMacInfoPlist || bCreateIOSInfoPlist || bCreateTVOSInfoPlist)
					{
						DirectoryReference? ProjectPath = GameDir;
						DirectoryReference EngineDir = DirectoryReference.Combine(new DirectoryReference(UEDir), "Engine");
						string GameName = Config.BuildTarget;
						bool bIsClient = false;
						if (ProjectPath == null)
						{
							ProjectPath = EngineDir;
						}
						if (bIsUnrealGame)
						{
							ProjectPath = EngineDir;
							GameName = "UnrealGame";
							bIsClient = (UnrealData.AppName == "UnrealClient");
						}

						if (bCreateMacInfoPlist)
						{
							Directory.CreateDirectory(Path.GetDirectoryName(MacInfoPlistPath)!);
							UEDeployMac.GeneratePList(ProjectPath.FullName, bIsUnrealGame, GameName, Config.BuildTarget, EngineDir.FullName, MacExecutableFileName);
						}
						if (bCreateIOSInfoPlist)
						{
							// get the receipt
							FileReference ReceiptFilename;
							if (bIsUnrealGame)
							{
								ReceiptFilename = TargetReceipt.GetDefaultPath(Unreal.EngineDirectory, "UnrealGame", UnrealTargetPlatform.IOS, Config.BuildConfig, "");
							}
							else
							{
								ReceiptFilename = TargetReceipt.GetDefaultPath(ProjectPath, GameName, UnrealTargetPlatform.IOS, Config.BuildConfig, "");
							}
							Directory.CreateDirectory(Path.GetDirectoryName(IOSInfoPlistPath)!);
							bool bSupportPortrait, bSupportLandscape;
							TargetReceipt? Receipt;
							TargetReceipt.TryRead(ReceiptFilename, out Receipt);
							bool bBuildAsFramework = UEDeployIOS.GetCompileAsDll(Receipt);
							UEDeployIOS.GenerateIOSPList(UnrealData.UProjectFileLocation, Config.BuildConfig, ProjectPath.FullName, bIsUnrealGame, GameName, bIsClient, Config.BuildTarget, EngineDir.FullName, ProjectPath + "/Binaries/IOS/Payload", null, UnrealData.BundleIdentifier, bBuildAsFramework, UnrealData.Logger!, out bSupportPortrait, out bSupportLandscape);
						}
						if (bCreateTVOSInfoPlist)
						{
							Directory.CreateDirectory(Path.GetDirectoryName(TVOSInfoPlistPath)!);
							UEDeployTVOS.GenerateTVOSPList(ProjectPath.FullName, bIsUnrealGame, GameName, bIsClient, Config.BuildTarget, EngineDir.FullName, ProjectPath + "/Binaries/TVOS/Payload", null, UnrealData.BundleIdentifier, UnrealData.Logger!);
						}
					}
				}

				ConfigXcconfig.Write();
			}
		}
	}

	class XcodeFileCollection
	{
		class ManualFileReference
		{
			public string Guid = XcodeProjectFileGenerator.MakeXcodeGuid();
			public string RelativePath = "";
			public string FileType = "";
			public string SourceTree = "";
			public string GroupName = "";
		}

		// we need relativ paths, so this is the directory that paths are relative to
		private DirectoryReference ProjectDirectory;

		public string MainGroupGuid = "";
		//public string ProductRefGroupGuid = XcodeProjectFileGenerator.MakeXcodeGuid();

		internal Dictionary<string, XcodeFileGroup> Groups = new();
		internal List<XcodeSourceFile> BuildableFiles = new();
		internal List<XcodeSourceFile> AllFiles = new();

		private List<ManualFileReference> ManualFiles = new();
		private Dictionary<string, string> GuidsForGroups = new();


		public XcodeFileCollection(XcodeProjectFile ProjectFile)
		{
			ProjectDirectory = ProjectFile.ProjectFilePath.Directory;
		}

		public void ProcessFile(XcodeSourceFile File, bool bIsForBuild)
		{
			//string FileName = File.Reference.GetFileName();
			//string FileExtension = Path.GetExtension(FileName);
			//string FilePath = File.Reference.MakeRelativeTo(ProjectFile.Directory);
			//string FilePathMac = Utils.CleanDirectorySeparators(FilePath, '/');
			//string FileGuid = File.FileGuid;
			//string FileRefGuid = File.FileRefGuid;

			// this is the main entry into the project for the file tree on the left of Xcode
			//			AddFileReference(FileRefGuid, FilePathMac, GetFileType(FileExtension));

			AllFiles.Add(File);

			// remember all buildable files - we may further filter this later when looking for SubTargets - the module the file is
			// in may not be built, which means it cannot be indexed
			if (bIsForBuild && ShouldIncludeFileInBuildPhaseSection(File))
			{
				BuildableFiles.Add(File);
			}

			// group the files by path
			XcodeFileGroup? Group = FindGroupByAbsolutePath(File.Reference.Directory.FullName);
			if (Group != null)
			{
				Group.Files.Add(File);
			}
		}

		/// <summary>
		/// The project needs to point to the product group, so we expose the Guid here
		/// </summary>
		/// <returns></returns>
		public string GetProductGroupGuid()
		{
			return GuidsForGroups["Products"];
		}

		public void AddFileReference(string Guid, string RelativePath, string FileType, string SourceTree/*="SOURCE_ROOT"*/, string GroupName)
		{
			ManualFiles.Add(new ManualFileReference()
			{
				Guid = Guid,
				RelativePath = RelativePath,
				FileType = FileType,
				SourceTree = SourceTree,
				GroupName = GroupName,
			});

			// make sure each unique group has a guid
			if (!GuidsForGroups.ContainsKey(GroupName))
			{
				GuidsForGroups[GroupName] = XcodeProjectFileGenerator.MakeXcodeGuid();
			}
		}


		public void Write(StringBuilder Content)
		{
			Content.WriteLine("/* Begin PBXBuildFile section */");
			foreach (XcodeSourceFile File in BuildableFiles)
			{
				Content.WriteLine($"\t\t{File.FileGuid} = {{isa = PBXBuildFile; fileRef = {File.FileRefGuid}; }}; /* {File.Reference.GetFileName()} */");
			}
			Content.WriteLine("/* End PBXBuildFile section */");
			Content.WriteLine();


			Content.WriteLine("/* Begin PBXFileReference section */");
			foreach (XcodeSourceFile File in AllFiles)
			{
				string FileName = File.Reference.GetFileName();
				string FileExtension = Path.GetExtension(FileName);
				string FileType = GetFileType(FileExtension);
				string RelativePath = Utils.CleanDirectorySeparators(File.Reference.MakeRelativeTo(ProjectDirectory), '/');
				string SourceTree = "SOURCE_ROOT";

				Content.WriteLine($"\t\t{File.FileRefGuid} = {{isa = PBXFileReference; explicitFileType = {FileType}; name = \"{FileName}\"; path = \"{RelativePath}\"; sourceTree = {SourceTree}; }};");
			}
			foreach (ManualFileReference File in ManualFiles)
			{
				string FileName = Path.GetFileName(File.RelativePath);
				Content.WriteLine($"\t\t{File.Guid} = {{isa = PBXFileReference; explicitFileType = {File.FileType}; name = \"{FileName}\"; path = \"{File.RelativePath}\"; sourceTree = {File.SourceTree}; }};");
			}
			Content.WriteLine("/* End PBXFileReference section */");
			Content.WriteLine();

			WriteGroups(Content);
		}

		private void WriteGroups(StringBuilder Content /*, List<UnrealExtensionInfo> AllExtensions*/)
		{
			XcodeFileGroup? RootGroup = FindRootFileGroup(Groups);
			if (RootGroup == null)
			{
				return;
			}

			string XcconfigsRefGroupGuid = XcodeProjectFileGenerator.MakeXcodeGuid();

			Content.WriteLine("/* Begin PBXGroup section */");


			// write main/root group and it's children (adding the manual groups to the main group, which is the true param here0
			WriteGroup(Content, RootGroup, bIsRootGroup: true);

			// write some manual groups
			foreach (var Pair in GuidsForGroups)
			{
				Content.WriteLine($"\t\t{Pair.Value} /* {Pair.Key} */ = {{");
				Content.WriteLine("\t\t\tisa = PBXGroup;");
				Content.WriteLine("\t\t\tchildren = (");
				foreach (ManualFileReference Ref in ManualFiles.Where(x => x.GroupName == Pair.Key))
				{
					Content.WriteLine($"\t\t\t\t{Ref.Guid} /* {Path.GetFileName(Ref.RelativePath)} */,");
				}
				Content.WriteLine("\t\t\t);");
				Content.WriteLine($"\t\t\tname = {Pair.Key};");
				Content.WriteLine("\t\t\tsourceTree = \"<group>\";");
				Content.WriteLine("\t\t};");

			}

			// Products group
			//			Content.WriteLine($"\t\t\t\t{XcodeProject.TargetAppGuid} /* {XcodeProject.TargetName} */,");

			// @todo extensions
			//foreach (UnrealExtensionInfo EI in AllExtensions)
			//{
			//	Content.WriteLine(string.Format("\t\t\t\t{0} /* {1} */,{2}", EI.ProductGuid, EI.Name, ProjectFileGenerator.NewLine));
			//}
			// Xcconfigs group
			//Content.WriteLine($"\t\t{XcconfigsRefGroupGuid} /* XcconfigsRefGroupGuid */ = {{");
			//	Content.WriteLine("\t\t\tisa = PBXGroup;");
			//	Content.WriteLine("\t\t\tchildren = (");
			//		foreach (XcconfigFile Xcconfig in XcodeProject.AllXcconfigFiles)
			//		{
			//			Content.WriteLine($"\t\t\t\t{Xcconfig.Guid} /* {Xcconfig.Filename} */,{ProjectFileGenerator.NewLine}");
			//		}
			//	Content.WriteLine("\t\t\t);");
			//	Content.WriteLine("\t\t\tname = Xcconfigs;");
			//	Content.WriteLine("\t\t\tsourceTree = \"<group>\";");
			//Content.WriteLine("\t\t};");

			Content.WriteLine("/* End PBXGroup section */");
		}


		private void WriteGroup(StringBuilder Content, XcodeFileGroup Group, bool bIsRootGroup)
		{
			if (!Group.bIsReference)
			{
				Content.WriteLine($"\t\t{Group.GroupGuid} = {{");
				Content.WriteLine("\t\t\tisa = PBXGroup;");
				Content.WriteLine("\t\t\tchildren = (");
				foreach (XcodeFileGroup ChildGroup in Group.Children.Values)
				{
					Content.WriteLine($"\t\t\t\t{ChildGroup.GroupGuid} /* {ChildGroup.GroupName} */,");
				}
				foreach (XcodeSourceFile File in Group.Files)
				{
					Content.WriteLine($"\t\t\t\t{File.FileRefGuid} /* {File.Reference.GetFileName()} */,");
				}

				if (bIsRootGroup)
				{
					foreach (var Pair in GuidsForGroups)
					{
						Content.WriteLine($"\t\t\t\t{Pair.Value} /* {Pair.Key} */,");
					}
				}
				Content.WriteLine("\t\t\t);");
				if (!bIsRootGroup)
				{
					Content.WriteLine("\t\t\tname = \"" + Group.GroupName + "\";");
					Content.WriteLine("\t\t\tpath = \"" + Group.GroupPath + "\";");
					Content.WriteLine("\t\t\tsourceTree = \"<absolute>\";");
				}
				else
				{
					Content.WriteLine("\t\t\tsourceTree = \"<group>\";");
				}
				Content.WriteLine("\t\t};");

				foreach (XcodeFileGroup ChildGroup in Group.Children.Values)
				{
					WriteGroup(Content, ChildGroup, bIsRootGroup: false);
				}
			}
		}

		public static string GetRootGroupGuid(Dictionary<string, XcodeFileGroup> GroupsDict)
		{
			return FindRootFileGroup(GroupsDict)!.GroupGuid;
		}

		private static XcodeFileGroup? FindRootFileGroup(Dictionary<string, XcodeFileGroup> GroupsDict)
		{
			foreach (XcodeFileGroup Group in GroupsDict.Values)
			{
				if (Group.Children.Count > 1 || Group.Files.Count > 0)
				{
					return Group;
				}
				else
				{
					XcodeFileGroup? Found = FindRootFileGroup(Group.Children);
					if (Found != null)
					{
						return Found;
					}
				}
			}
			return null;
		}


		/// <summary>
		/// Gets Xcode file category based on its extension
		/// </summary>
		internal static string GetFileCategory(string Extension)
		{
			// @todo Mac: Handle more categories
			switch (Extension)
			{
				case ".framework":
					return "Frameworks";
				default:
					return "Sources";
			}
		}

		/// <summary>
		/// Gets Xcode file type based on its extension
		/// </summary>
		internal static string GetFileType(string Extension)
		{
			// @todo Mac: Handle more file types
			switch (Extension)
			{
				case ".c":
				case ".m":
					return "sourcecode.c.objc";
				case ".cc":
				case ".cpp":
				case ".mm":
					return "sourcecode.cpp.objcpp";
				case ".h":
				case ".inl":
				case ".pch":
					return "sourcecode.c.h";
				case ".framework":
					return "wrapper.framework";
				case ".plist":
					return "text.plist.xml";
				case ".png":
					return "image.png";
				case ".icns":
					return "image.icns";
				default:
					return "file.text";
			}
		}

		/// <summary>
		/// Returns true if Extension is a known extension for files containing source code
		/// </summary>
		internal static bool IsSourceCode(string Extension)
		{
			return Extension == ".c" || Extension == ".cc" || Extension == ".cpp" || Extension == ".m" || Extension == ".mm";
		}

		static string[] ExcludedFolders = PlatformExports.GetExcludedFolderNames(UnrealTargetPlatform.Mac);
		internal static bool ShouldIncludeFileInBuildPhaseSection(XcodeSourceFile SourceFile)
		{
			string FileExtension = SourceFile.Reference.GetExtension();

			if (IsSourceCode(FileExtension))
			{
				// look if it contains any of the exluded names, and is so, don't include it
				return !ExcludedFolders.Any(x => SourceFile.Reference.ContainsName(x, 0));
			}

			return false;
		}

		/// <summary>
		/// Returns a project navigator group to which the file should belong based on its path.
		/// Creates a group tree if it doesn't exist yet.
		/// </summary>
		internal XcodeFileGroup? FindGroupByAbsolutePath(string AbsolutePath)
		{
			string[] Parts = AbsolutePath.Split(Path.DirectorySeparatorChar);
			string CurrentPath = "/";
			Dictionary<string, XcodeFileGroup> CurrentSubGroups = Groups;

			for (int Index = 1; Index < Parts.Count(); ++Index)
			{
				string Part = Parts[Index];

				if (CurrentPath.Length > 1)
				{
					CurrentPath += Path.DirectorySeparatorChar;
				}

				CurrentPath += Part;

				XcodeFileGroup CurrentGroup;
				if (!CurrentSubGroups.ContainsKey(CurrentPath))
				{
					CurrentGroup = new XcodeFileGroup(Path.GetFileName(CurrentPath), CurrentPath, CurrentPath.EndsWith(".xcassets"));
					if (Groups.Count == 0)
					{
						MainGroupGuid = CurrentGroup.GroupGuid;
					}
					CurrentSubGroups.Add(CurrentPath, CurrentGroup);
				}
				else
				{
					CurrentGroup = CurrentSubGroups[CurrentPath];
				}

				if (CurrentPath == AbsolutePath)
				{
					return CurrentGroup;
				}

				CurrentSubGroups = CurrentGroup.Children;
			}

			return null;
		}

		/// <summary>
		/// Convert all paths to Apple/Unix format (with forward slashes)
		/// </summary>
		/// <param name="InPath">The path to convert</param>
		/// <returns>The normalized path</returns>
		internal static string ConvertPath(string InPath)
		{
			return InPath.Replace("\\", "/");
		}
	}


	class XcodeProjectFile : ProjectFile
	{

		/// <summary>
		/// Constructs a new project file object
		/// </summary>
		/// <param name="InitFilePath">The path to the project file on disk</param>
		/// <param name="BaseDir">The base directory for files within this project</param>
		/// <param name="bIsForDistribution">True for distribution builds</param>
		/// <param name="BundleID">Override option for bundle identifier</param>
		/// <param name="AppName"></param>
		public XcodeProjectFile(FileReference InitFilePath, DirectoryReference BaseDir, bool bIsForDistribution, string BundleID, string AppName)
			: base(InitFilePath, BaseDir)
		{
			UnrealData = new UnrealData();

			UnrealData.bForDistribution = bIsForDistribution;
			UnrealData.BundleIdentifier = BundleID;
			UnrealData.AppName = AppName;

			// create the container for all the files that will 
			FileCollection = new XcodeFileCollection(this);
		}

		public UnrealData UnrealData;

		/// <summary>
		///  The PBXPRoject node, root of everything
		/// </summary>
		public XcodeProject? RootProject;

		/// <summary>
		/// Gathers the files and generates project sections
		/// </summary>
		public XcodeFileCollection FileCollection;

		/// <summary>
		/// Allocates a generator-specific source file object
		/// </summary>
		/// <param name="InitFilePath">Path to the source file on disk</param>
		/// <param name="InitProjectSubFolder">Optional sub-folder to put the file in.  If empty, this will be determined automatically from the file's path relative to the project file</param>
		/// <returns>The newly allocated source file object</returns>
		public override SourceFile? AllocSourceFile(FileReference InitFilePath, DirectoryReference? InitProjectSubFolder)
		{
			if (InitFilePath.GetFileName().StartsWith("."))
			{
				return null;
			}
			return new XcodeSourceFile(InitFilePath, InitProjectSubFolder);
		}

		public override void AddModule(UEBuildModuleCPP Module, CppCompileEnvironment CompileEnvironment)
		{
			UnrealData.AddModule(Module, CompileEnvironment);
		}

		/// <summary>
		/// Generates bodies of all sections that contain a list of source files plus a dictionary of project navigator groups.
		/// </summary>
		private void ProcessSourceFiles()
		{
			// process the files that came from UE/cross-platform land
			SourceFiles.SortBy(x => x.Reference.FullName);

			foreach (XcodeSourceFile SourceFile in SourceFiles.OfType<XcodeSourceFile>())
			{
				FileCollection.ProcessFile(SourceFile, bIsForBuild:IsGeneratedProject);
			}

			// cache the main group
			FileCollection.MainGroupGuid = XcodeFileCollection.GetRootGroupGuid(FileCollection.Groups);

			UnrealData.FilterBuildableFiles(FileCollection);
		}




		/// Implements Project interface
		public override bool WriteProjectFile(List<UnrealTargetPlatform> InPlatforms, List<UnrealTargetConfiguration> InConfigurations, PlatformProjectGeneratorCollection PlatformProjectGenerators, ILogger Logger)
		{
			if (UnrealData.Initialize(this, InPlatforms, InConfigurations, Logger) == false)
			{
				// if we failed to initialize, we silently return to move on (it's not an error, it's a project with nothing to do)
				return true;
			}

			// look for an existing project to use as a template (if none found, create one from scratch)
			DirectoryReference BuildDirLocation = UnrealData.UProjectFileLocation == null ? Unreal.EngineDirectory : UnrealData.UProjectFileLocation.Directory;
			string ExistingProjectName = UnrealData.XcodeProjectFileLocation!.GetFileNameWithoutAnyExtensions();
			FileReference TemplateProject = FileReference.Combine(BuildDirLocation, "Build", "IOS", ExistingProjectName + ".xcodeproj", "project.pbxproj");

			UnrealData.bIsMergingProjects = FileReference.Exists(TemplateProject);
			UnrealData.bWriteCodeSigningSettings = !UnrealData.bIsMergingProjects;


			// turn all UE files into internal representation
			ProcessSourceFiles();

			// now create the xcodeproject elements (project -> target -> buildconfigs, etc)
			RootProject = new XcodeProject(UnrealData, FileCollection);


			if (TemplateProject.FullName.Contains("ThirdPerson"))
			{
				Console.WriteLine("foo");
			}

			bool bSuccess;
			if (FileReference.Exists(TemplateProject))
			{
				bSuccess = MergeIntoTemplateProject(TemplateProject);
			}
			else
			{
				FileReference PBXProjFilePath = ProjectFilePath + "/project.pbxproj";

				StringBuilder Content = new StringBuilder();

				Content.WriteLine(0, "// !$*UTF8*$!");
				Content.WriteLine(0, "{");
				Content.WriteLine(1, "archiveVersion = 1;");
				Content.WriteLine(1, "classes = {");
				Content.WriteLine(1, "};");
				Content.WriteLine(1, "objectVersion = 46;");
				Content.WriteLine(1, "objects = {");

				// write out the list of files and groups
				FileCollection.Write(Content);

				// now write out the project node and its recursive dependent nodes
				XcodeProjectNode.WriteNodeAndReferences(Content, RootProject);

				Content.WriteLine(1, "};");
				Content.WriteLine(1, $"rootObject = {RootProject.Guid} /* Project object */;");
				Content.WriteLine(0, "}");

				// finally write out the pbxproj file!
				bSuccess = ProjectFileGenerator.WriteFileIfChanged(PBXProjFilePath.FullName, Content.ToString(), Logger, new UTF8Encoding());
			}




			bool bNeedScheme = UnrealData.CanBuildProjectLocally(this, Logger);
			if (bNeedScheme)
			{
				if (bSuccess)
				{
					string TargetName = ProjectFilePath.GetFileNameWithoutAnyExtensions();
					string RunTargetGuid = XcodeProjectNode.GetNodesOfType<XcodeRunTarget>(RootProject).First()!.Guid;
					string? BuildTargetGuid = XcodeProjectNode.GetNodesOfType<XcodeBuildTarget>(RootProject).FirstOrDefault()?.Guid;
					string? IndexTargetGuid = XcodeProjectNode.GetNodesOfType<XcodeIndexTarget>(RootProject).FirstOrDefault()?.Guid;
					WriteSchemeFile(TargetName, RunTargetGuid, BuildTargetGuid, IndexTargetGuid, UnrealData.bHasEditorConfiguration, UnrealData.UProjectFileLocation != null ? UnrealData.UProjectFileLocation.FullName : "");
				}
			}
			else
			{
				// clean this up because we don't want it persisting if we narrow our project list
				DirectoryReference SchemeDir = GetProjectSchemeDirectory();

				if (DirectoryReference.Exists(SchemeDir))
				{
					DirectoryReference.Delete(SchemeDir, true);
				}
			}

			return bSuccess;
		}


		private string Plist(string Command)
		{
			Command = Command.Replace("\"", "\\\"");
			string Output = Utils.RunLocalProcessAndReturnStdOut("/usr/libexec/PlistBuddy", $"-c \"{Command}\" \"{ProjectFilePath.FullName}/project.pbxproj\"");
			
			//Console.WriteLine($"{Command} ==> {Output}");

			return Output;
		}

		private void PlistSetAdd(string Entry, string Value, string Type="string")
		{
			string AddOutput = Plist($"Add {Entry} {Type} {Value}");
			// error will be non-empty string
			if (AddOutput != "")
			{
				Plist($"Set {Entry} {Value}");
			}
		}

		private bool PlistSetUpdate(string Entry, string Value)
		{
			// see if the setting is already there
			string ExistingSetting = Plist($"Print {Entry}");

			// Print errors start with Print
			if (!ExistingSetting.StartsWith("Print:") && ExistingSetting != Value)
			{
				Plist($"Set {Entry} {Value}");

				return true;
			}

			return false;
		}

		private IEnumerable<string> PlistArray(string Entry)
		{
			return Plist($"Print {Entry}")
				.Replace("Array {", "")
				.Replace("}", "")
				.Trim()
				.ReplaceLineEndings()
				.Split(Environment.NewLine)
				.Select(x => x.Trim());
		}

		private List<string> PlistObjects()
		{
			List<string> Result = new();

			IEnumerable<string> Lines = Plist("print :objects")
				.ReplaceLineEndings()
				.Split(Environment.NewLine);

			Regex Regex = new Regex("^    (\\S*) = Dict {$");
			foreach (string Line in Lines)
			{
				Match Match = Regex.Match(Line);
				if (Match.Success)
				{
					Result.Add(Match.Groups[1].Value);
				}
			}
			return Result;
		}

		private string? PlistFixPath(string Entry, string RelativeToProject)
		{
			string ExistingPath = Plist($"Print {Entry}");
			// skip of errors, or it's an absolute path
			if (!ExistingPath.StartsWith("Print:") && !ExistingPath.StartsWith("/"))
			{
				// fixup the path to be relative to new project instead of old
				string FixedPath = Utils.CollapseRelativeDirectories(Path.Combine(RelativeToProject, ExistingPath));
				// and set it back
				Plist($"Set {Entry} {FixedPath}");

				return FixedPath;
			}

			return null;
		}


		bool MergeIntoTemplateProject(FileReference TemplateProject)
		{
			FileReference PBXProjFilePath = ProjectFilePath + "/project.pbxproj";

			// copy existing template project to final location
			if (FileReference.Exists(PBXProjFilePath))
			{
				FileReference.Delete(PBXProjFilePath);
			}
			DirectoryReference.CreateDirectory(PBXProjFilePath.Directory);
			FileReference.Copy(TemplateProject, PBXProjFilePath);

			// write the nodes we need to add (Build/Index targets)
			XcodeRunTarget RunTarget = XcodeProjectNode.GetNodesOfType<XcodeRunTarget>(RootProject!).First();
			XcodeBuildTarget BuildTarget = XcodeProjectNode.GetNodesOfType<XcodeBuildTarget>(RunTarget).First();
			XcodeIndexTarget IndexTarget = XcodeProjectNode.GetNodesOfType<XcodeIndexTarget>(RootProject!).First();
			XcodeDependency BuildDependency = XcodeProjectNode.GetNodesOfType<XcodeDependency>(RunTarget).First();

			// the runtarget and project need to write out so all of their xcconfigs get written as well,
			// so write everything to a temp string that is tossed, but all xcconfigs will be done at least
			StringBuilder Temp = new StringBuilder();
			XcodeProjectNode.WriteNodeAndReferences(Temp, RootProject!);

			StringBuilder Content = new StringBuilder();
			Content.WriteLine(0, "{");
			FileCollection.Write(Content);
			XcodeProjectNode.WriteNodeAndReferences(Content, BuildTarget);
			XcodeProjectNode.WriteNodeAndReferences(Content, IndexTarget);
			XcodeProjectNode.WriteNodeAndReferences(Content, BuildDependency);
			Content.WriteLine(0, "}");

			// write to disk
			FileReference ImportFile = FileReference.Combine(PBXProjFilePath.Directory, "import.plist");
			File.WriteAllText(ImportFile.FullName, Content.ToString());


			// cache some standard guids from the template project
			string ProjectGuid = Plist($"Print :rootObject");
			string TemplateMainGroupGuid = Plist($"Print :objects:{ProjectGuid}:mainGroup");

			// fixup paths that were relative to original project to be relative to merged project
//			List<string> ObjectGuids = PlistObjects();
			IEnumerable<string> MainGroupChildrenGuids = PlistArray($":objects:{TemplateMainGroupGuid}:children");

			string RelativeFromMergedToTemplate = TemplateProject.Directory.ParentDirectory!.MakeRelativeTo(PBXProjFilePath.Directory.ParentDirectory!);

			// look for groups with a 'path' element that is in the main group, so that it and everything will get redirected to new location
			string? FixedPath;
			foreach (string ChildGuid in MainGroupChildrenGuids)
			{
				string IsA = Plist($"Print :objects:{ChildGuid}:isa");
				// if a Group has a path
				if (IsA == "PBXGroup")
				{
					if ((FixedPath = PlistFixPath($":objects:{ChildGuid}:path", RelativeFromMergedToTemplate)) != null)
					{
						// if there wasn't a name before, it will now have a nasty path as the name, so add it now
						PlistSetAdd($":objects:{ChildGuid}:name", Path.GetFileName(FixedPath));
					}
				}
			}

			// and import it into the template
			Plist($"Merge \"{ImportFile.FullName}\" :objects");


			// get all the targets in the template that are application types
			IEnumerable<string> AppTargetGuids = PlistArray($":objects:{ProjectGuid}:targets")
				.Where(TargetGuid => (Plist($"Print :objects:{TargetGuid}:productType") == "com.apple.product-type.application"));

			// add a dependency on the build target from the app target(s)
			foreach (string AppTargetGuid in AppTargetGuids)
			{
				Plist($"Add :objects:{AppTargetGuid}:dependencies:0 string {BuildDependency.Guid}");
			}

			// the BuildDependency object was in the "container" of the generated project, not the merged one, so fix it up now
			Plist($"Set :objects:{BuildDependency.ProxyGuid}:containerPortal {ProjectGuid}");

			// now add all the non-run targets from the generated
			foreach (XcodeTarget Target in XcodeProjectNode.GetNodesOfType<XcodeTarget>(RootProject!).Where(x => x.GetType() != typeof(XcodeRunTarget)))
			{
				Plist($"Add :objects:{ProjectGuid}:targets:0 string {Target.Guid}");
			}


			// hook up Xcconfig files to the project and the project configs
			// @todo how to manage with conflicts already present...
			//PlistSetAdd($":objects:{ProjectGuid}:baseConfigurationReference", RootProject.Xcconfig!.Guid, "string");

			// re-get the list of targets now that we merged in the other file
			IEnumerable<string> AllTargetGuids = PlistArray($":objects:{ProjectGuid}:targets");

			List<string> NodesToFix = new() { ProjectGuid };
			NodesToFix.AddRange(AllTargetGuids);

			bool bIsProject = true;
			foreach (string NodeGuid in NodesToFix)
			{
				bool bIsAppTarget = AppTargetGuids.Contains(NodeGuid);

				// get the config list, and from there we can get the configs
				string ProjectBuildConfigListGuid = Plist($"Print :objects:{NodeGuid}:buildConfigurationList");

				IEnumerable<string> ConfigGuids = PlistArray($":objects:{ProjectBuildConfigListGuid}:buildConfigurations");
				foreach (string ConfigGuid in ConfigGuids)
				{
					// find the matching unreal generated project build config to hook up to
					// for now we assume Release is Development [Editor], but we should make sure the template project has good configs
					// we have to rename the template config from Release because it won't find the matching config in the build target
					string ConfigName = Plist($"Print :objects:{ConfigGuid}:name");
					if (ConfigName == "Release")
					{
						ConfigName = UnrealData.bHasEditorConfiguration ? "Development Editor" : "Development";
						Plist($"Set :objects:{ConfigGuid}:name \"{ConfigName}\"");
					}

					// if there's a plist path, then it will need to be fixed up
					PlistFixPath($":objects:{ConfigGuid}:buildSettings:INFOPLIST_FILE", RelativeFromMergedToTemplate);

					if (bIsProject)
					{
						Console.WriteLine("Looking for " + ConfigName);
						XcodeBuildConfig Config = RootProject!.ProjectBuildConfigs.BuildConfigs.First(x => x.Info.DisplayName == ConfigName);
						PlistSetAdd($":objects:{ConfigGuid}:baseConfigurationReference", Config.Xcconfig!.Guid, "string");
					}

					// the Build target used some ini settings to compile, and Run target must match, so we override a few settings, at
					// whatever level they were already specified at (Projet and/or Target)
					PlistSetUpdate($":objects:{ConfigGuid}:buildSettings:MACOSX_DEPLOYMENT_TARGET", MacToolChain.Settings.MacOSVersion);
					if (UnrealData.IOSProjectSettings != null)
					{
						PlistSetUpdate($":objects:{ConfigGuid}:buildSettings:IPHONEOS_DEPLOYMENT_TARGET", UnrealData.IOSProjectSettings.RuntimeVersion);
					}
					if (UnrealData.TVOSProjectSettings != null)
					{
						PlistSetUpdate($":objects:{ConfigGuid}:buildSettings:TVOS_DEPLOYMENT_TARGET", UnrealData.TVOSProjectSettings.RuntimeVersion);
					}
				}

				bIsProject = false;
			}

			// now we need to merge the main groups together
			string GeneratedMainGroupGuid = FileCollection.MainGroupGuid;
			int Index = 0;
			while (true)
			{
				// we copy to a high index to put the copied entries at the end in the same order
				string Output = Plist($"Copy :objects:{GeneratedMainGroupGuid}:children:{Index} :objects:{TemplateMainGroupGuid}:children:100000000");

				// loop until error
				if (Output != "")
				{
					break;
				}
				Index++;
			}
			// and remove the one we copied from
			Plist($"Delete :objects:{GeneratedMainGroupGuid}");

			return true;
		}

		#region Schemes

		private FileReference GetUserSchemeManagementFilePath()
		{
			return new FileReference(ProjectFilePath.FullName + "/xcuserdata/" + Environment.UserName + ".xcuserdatad/xcschemes/xcschememanagement.plist");
		}

		private DirectoryReference GetProjectSchemeDirectory()
		{
			return new DirectoryReference(ProjectFilePath.FullName + "/xcshareddata/xcschemes");
		}

		private FileReference GetProjectSchemeFilePathForTarget(string TargetName)
		{
			return FileReference.Combine(GetProjectSchemeDirectory(), TargetName + ".xcscheme");
		}

		private void WriteSchemeFile(string TargetName, string TargetGuid, string? BuildTargetGuid, string? IndexTargetGuid, bool bHasEditorConfiguration, string GameProjectPath)
		{

			FileReference SchemeFilePath = GetProjectSchemeFilePathForTarget(TargetName);

			DirectoryReference.CreateDirectory(SchemeFilePath.Directory);

			string? OldCommandLineArguments = null;
			if (FileReference.Exists(SchemeFilePath))
			{
				string OldContents = File.ReadAllText(SchemeFilePath.FullName);
				int OldCommandLineArgumentsStart = OldContents.IndexOf("<CommandLineArguments>") + "<CommandLineArguments>".Length;
				int OldCommandLineArgumentsEnd = OldContents.IndexOf("</CommandLineArguments>");
				if (OldCommandLineArgumentsStart != -1 && OldCommandLineArgumentsEnd != -1)
				{
					OldCommandLineArguments = OldContents.Substring(OldCommandLineArgumentsStart, OldCommandLineArgumentsEnd - OldCommandLineArgumentsStart);
				}
			}

			string DefaultConfiguration = bHasEditorConfiguration && !XcodeProjectFileGenerator.bGeneratingRunIOSProject && !XcodeProjectFileGenerator.bGeneratingRunTVOSProject ? "Development Editor" : "Development";

			StringBuilder Content = new StringBuilder();

			Content.WriteLine("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
			Content.WriteLine("<Scheme");
			Content.WriteLine("   LastUpgradeVersion = \"2000\"");
			Content.WriteLine("   version = \"1.3\">");
			Content.WriteLine("   <BuildAction");
			Content.WriteLine("      parallelizeBuildables = \"YES\"");
			Content.WriteLine("      buildImplicitDependencies = \"YES\">");
			Content.WriteLine("      <BuildActionEntries>");
			Content.WriteLine("         <BuildActionEntry");
			Content.WriteLine("            buildForTesting = \"YES\"");
			Content.WriteLine("            buildForRunning = \"YES\"");
			Content.WriteLine("            buildForProfiling = \"YES\"");
			Content.WriteLine("            buildForArchiving = \"YES\"");
			Content.WriteLine("            buildForAnalyzing = \"YES\">");
			Content.WriteLine("            <BuildableReference");
			Content.WriteLine("               BuildableIdentifier = \"primary\"");
			Content.WriteLine("               BlueprintIdentifier = \"" + TargetGuid + "\"");
			Content.WriteLine("               BuildableName = \"" + TargetName + ".app\"");
			Content.WriteLine("               BlueprintName = \"" + TargetName + "\"");
			Content.WriteLine("               ReferencedContainer = \"container:" + TargetName + ".xcodeproj\">");
			Content.WriteLine("            </BuildableReference>");
			Content.WriteLine("         </BuildActionEntry>");
			Content.WriteLine("      </BuildActionEntries>");
			Content.WriteLine("   </BuildAction>");
			Content.WriteLine("   <TestAction");
			Content.WriteLine("      buildConfiguration = \"" + DefaultConfiguration + "\"");
			Content.WriteLine("      selectedDebuggerIdentifier = \"Xcode.DebuggerFoundation.Debugger.LLDB\"");
			Content.WriteLine("      selectedLauncherIdentifier = \"Xcode.DebuggerFoundation.Launcher.LLDB\"");
			Content.WriteLine("      shouldUseLaunchSchemeArgsEnv = \"YES\">");
			Content.WriteLine("      <Testables>");
			Content.WriteLine("      </Testables>");
			Content.WriteLine("      <MacroExpansion>");
			Content.WriteLine("            <BuildableReference");
			Content.WriteLine("               BuildableIdentifier = \"primary\"");
			Content.WriteLine("               BlueprintIdentifier = \"" + TargetGuid + "\"");
			Content.WriteLine("               BuildableName = \"" + TargetName + ".app\"");
			Content.WriteLine("               BlueprintName = \"" + TargetName + "\"");
			Content.WriteLine("               ReferencedContainer = \"container:" + TargetName + ".xcodeproj\">");
			Content.WriteLine("            </BuildableReference>");
			Content.WriteLine("      </MacroExpansion>");
			Content.WriteLine("      <AdditionalOptions>");
			Content.WriteLine("      </AdditionalOptions>");
			Content.WriteLine("   </TestAction>");
			Content.WriteLine("   <LaunchAction");
			Content.WriteLine("      buildConfiguration = \"" + DefaultConfiguration + "\"");
			Content.WriteLine("      selectedDebuggerIdentifier = \"Xcode.DebuggerFoundation.Debugger.LLDB\"");
			Content.WriteLine("      selectedLauncherIdentifier = \"Xcode.DebuggerFoundation.Launcher.LLDB\"");
			Content.WriteLine("      launchStyle = \"0\"");
			Content.WriteLine("      useCustomWorkingDirectory = \"NO\"");
			Content.WriteLine("      ignoresPersistentStateOnLaunch = \"NO\"");
			Content.WriteLine("      debugDocumentVersioning = \"YES\"");
			Content.WriteLine("      debugServiceExtension = \"internal\"");
			Content.WriteLine("      allowLocationSimulation = \"YES\">");
			Content.WriteLine("      <BuildableProductRunnable");
			Content.WriteLine("         runnableDebuggingMode = \"0\">");
			Content.WriteLine("            <BuildableReference");
			Content.WriteLine("               BuildableIdentifier = \"primary\"");
			Content.WriteLine("               BlueprintIdentifier = \"" + TargetGuid + "\"");
			Content.WriteLine("               BuildableName = \"" + TargetName + ".app\"");
			Content.WriteLine("               BlueprintName = \"" + TargetName + "\"");
			Content.WriteLine("               ReferencedContainer = \"container:" + TargetName + ".xcodeproj\">");
			Content.WriteLine("            </BuildableReference>");
			Content.WriteLine("      </BuildableProductRunnable>");
			if (string.IsNullOrEmpty(OldCommandLineArguments))
			{
				if (bHasEditorConfiguration && TargetName != "UE5")
				{
					Content.WriteLine("      <CommandLineArguments>");
					if (IsForeignProject)
					{
						Content.WriteLine("         <CommandLineArgument");
						Content.WriteLine("            argument = \"&quot;" + GameProjectPath + "&quot;\"");
						Content.WriteLine("            isEnabled = \"YES\">");
						Content.WriteLine("         </CommandLineArgument>");
					}
					else
					{
						Content.WriteLine("         <CommandLineArgument");
						Content.WriteLine("            argument = \"" + TargetName + "\"");
						Content.WriteLine("            isEnabled = \"YES\">");
						Content.WriteLine("         </CommandLineArgument>");
					}
					// Always add a configuration argument
					Content.WriteLine("         <CommandLineArgument");
					Content.WriteLine("            argument = \"-RunConfig=$(Configuration)\"");
					Content.WriteLine("            isEnabled = \"YES\">");
					Content.WriteLine("         </CommandLineArgument>");
					Content.WriteLine("      </CommandLineArguments>");
				}
			}
			else
			{
				Content.WriteLine("      <CommandLineArguments>" + OldCommandLineArguments + "</CommandLineArguments>");
			}
			Content.WriteLine("      <AdditionalOptions>");
			Content.WriteLine("      </AdditionalOptions>");
			Content.WriteLine("   </LaunchAction>");
			Content.WriteLine("   <ProfileAction");
			Content.WriteLine("      buildConfiguration = \"" + DefaultConfiguration + "\"");
			Content.WriteLine("      shouldUseLaunchSchemeArgsEnv = \"YES\"");
			Content.WriteLine("      savedToolIdentifier = \"\"");
			Content.WriteLine("      useCustomWorkingDirectory = \"NO\"");
			Content.WriteLine("      debugDocumentVersioning = \"YES\">");
			Content.WriteLine("      <BuildableProductRunnable");
			Content.WriteLine("         runnableDebuggingMode = \"0\">");
			Content.WriteLine("            <BuildableReference");
			Content.WriteLine("               BuildableIdentifier = \"primary\"");
			Content.WriteLine("               BlueprintIdentifier = \"" + TargetGuid + "\"");
			Content.WriteLine("               BuildableName = \"" + TargetName + ".app\"");
			Content.WriteLine("               BlueprintName = \"" + TargetName + "\"");
			Content.WriteLine("               ReferencedContainer = \"container:" + TargetName + ".xcodeproj\">");
			Content.WriteLine("            </BuildableReference>");
			Content.WriteLine("      </BuildableProductRunnable>");
			Content.WriteLine("   </ProfileAction>");
			Content.WriteLine("   <AnalyzeAction");
			Content.WriteLine("      buildConfiguration = \"" + DefaultConfiguration + "\">");
			Content.WriteLine("   </AnalyzeAction>");
			Content.WriteLine("   <ArchiveAction");
			Content.WriteLine("      buildConfiguration = \"" + DefaultConfiguration + "\"");
			Content.WriteLine("      revealArchiveInOrganizer = \"YES\">");
			Content.WriteLine("   </ArchiveAction>");
			Content.WriteLine("</Scheme>");

			File.WriteAllText(SchemeFilePath.FullName, Content.ToString(), new UTF8Encoding());

			Content.Clear();

			Content.WriteLine("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
			Content.WriteLine("<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">");
			Content.WriteLine("<plist version=\"1.0\">");
			Content.WriteLine("<dict>");
			Content.WriteLine("\t<key>SchemeUserState</key>");
			Content.WriteLine("\t<dict>");
			Content.WriteLine("\t\t<key>" + TargetName + ".xcscheme_^#shared#^_</key>");
			Content.WriteLine("\t\t<dict>");
			Content.WriteLine("\t\t\t<key>orderHint</key>");
			Content.WriteLine("\t\t\t<integer>1</integer>");
			Content.WriteLine("\t\t</dict>");
			Content.WriteLine("\t</dict>");
			Content.WriteLine("\t<key>SuppressBuildableAutocreation</key>");
			Content.WriteLine("\t<dict>");
			Content.WriteLine("\t\t<key>" + TargetGuid + "</key>");
			Content.WriteLine("\t\t<dict>");
			Content.WriteLine("\t\t\t<key>primary</key>");
			Content.WriteLine("\t\t\t<true/>");
			Content.WriteLine("\t\t</dict>");
			if (BuildTargetGuid != null)
			{
				Content.WriteLine("\t\t<key>" + BuildTargetGuid + "</key>");
				Content.WriteLine("\t\t<dict>");
				Content.WriteLine("\t\t\t<key>primary</key>");
				Content.WriteLine("\t\t\t<true/>");
				Content.WriteLine("\t\t</dict>");
			}
			if (IndexTargetGuid != null)
			{
				Content.WriteLine("\t\t<key>" + IndexTargetGuid + "</key>");
				Content.WriteLine("\t\t<dict>");
				Content.WriteLine("\t\t\t<key>primary</key>");
				Content.WriteLine("\t\t\t<true/>");
				Content.WriteLine("\t\t</dict>");
			}
			Content.WriteLine("\t</dict>");
			Content.WriteLine("</dict>");
			Content.WriteLine("</plist>");

			FileReference ManagementFile = GetUserSchemeManagementFilePath();
			if (!DirectoryReference.Exists(ManagementFile.Directory))
			{
				DirectoryReference.CreateDirectory(ManagementFile.Directory);
			}

			File.WriteAllText(ManagementFile.FullName, Content.ToString(), new UTF8Encoding());
		}

#endregion


#region Utilities

		public override string ToString()
		{
			return ProjectFilePath.GetFileNameWithoutExtension();
		}





#endregion

	}
}