/// <summary>
/// Checks if the editor is currently running and this is a hot-reload
/// </summary>
public static bool ShouldDoHotReloadFromIDE(BuildConfiguration BuildConfiguration, TargetDescriptor TargetDesc)
{
// Check if Hot-reload is disabled globally for this project
ConfigHierarchy Hierarchy = ConfigCache.ReadHierarchy(ConfigHierarchyType.Engine, DirectoryReference.FromFile(TargetDesc.ProjectFile), TargetDesc.Platform);
bool bAllowHotReloadFromIDE;
if (Hierarchy.TryGetValue("BuildConfiguration", "bAllowHotReloadFromIDE", out bAllowHotReloadFromIDE) && !bAllowHotReloadFromIDE)
{
return(false);
}
if (!BuildConfiguration.bAllowHotReloadFromIDE)
{
return(false);
}
// Check if we're using LiveCode instead
ConfigHierarchy EditorPerProjectHierarchy = ConfigCache.ReadHierarchy(ConfigHierarchyType.EditorPerProjectUserSettings, DirectoryReference.FromFile(TargetDesc.ProjectFile), TargetDesc.Platform);
bool bEnableLiveCode;
if (EditorPerProjectHierarchy.GetBool("/Script/LiveCoding.LiveCodingSettings", "bEnabled", out bEnableLiveCode) && bEnableLiveCode)
{
return(false);
}
bool bIsRunning = false;
// @todo ubtmake: Kind of cheating here to figure out if an editor target. At this point we don't have access to the actual target description, and
// this code must be able to execute before we create or load module rules DLLs so that hot reload can work with bUseUBTMakefiles
if (TargetDesc.Name.EndsWith("Editor", StringComparison.OrdinalIgnoreCase))
{
string EditorBaseFileName = "UE4Editor";
if (TargetDesc.Configuration != UnrealTargetConfiguration.Development)
{
EditorBaseFileName = String.Format("{0}-{1}-{2}", EditorBaseFileName, TargetDesc.Platform, TargetDesc.Configuration);
}
FileReference EditorLocation;
if (TargetDesc.Platform == UnrealTargetPlatform.Win64)
{
EditorLocation = FileReference.Combine(UnrealBuildTool.EngineDirectory, "Binaries", "Win64", String.Format("{0}.exe", EditorBaseFileName));
}
else if (TargetDesc.Platform == UnrealTargetPlatform.Mac)
{
EditorLocation = FileReference.Combine(UnrealBuildTool.EngineDirectory, "Binaries", "Mac", String.Format("{0}.app/Contents/MacOS/{0}", EditorBaseFileName));
}
else if (TargetDesc.Platform == UnrealTargetPlatform.Linux)
{
EditorLocation = FileReference.Combine(UnrealBuildTool.EngineDirectory, "Binaries", "Linux", EditorBaseFileName);
}
else
{
throw new BuildException("Unknown editor filename for this platform");
}
using (Timeline.ScopeEvent("Finding editor processes for hot-reload"))
{
DirectoryReference EditorRunsDir = DirectoryReference.Combine(UnrealBuildTool.EngineDirectory, "Intermediate", "EditorRuns");
if (!DirectoryReference.Exists(EditorRunsDir))
{
return(false);
}
if (BuildHostPlatform.Current.Platform == UnrealTargetPlatform.Win64)
{
foreach (FileReference EditorInstanceFile in DirectoryReference.EnumerateFiles(EditorRunsDir))
{
int ProcessId;
if (!Int32.TryParse(EditorInstanceFile.GetFileName(), out ProcessId))
{
FileReference.Delete(EditorInstanceFile);
continue;
}
Process RunningProcess;
try
{
RunningProcess = Process.GetProcessById(ProcessId);
}
catch
{
RunningProcess = null;
}
if (RunningProcess == null)
{
FileReference.Delete(EditorInstanceFile);
continue;
}
FileReference MainModuleFile;
try
{
MainModuleFile = new FileReference(RunningProcess.MainModule.FileName);
}
catch
{
MainModuleFile = null;
}
if (!bIsRunning && EditorLocation == MainModuleFile)
{
bIsRunning = true;
}
}
}
else
{
FileInfo[] EditorRunsFiles = new DirectoryInfo(EditorRunsDir.FullName).GetFiles();
BuildHostPlatform.ProcessInfo[] Processes = BuildHostPlatform.Current.GetProcesses();
foreach (FileInfo File in EditorRunsFiles)
{
int PID;
BuildHostPlatform.ProcessInfo Proc = null;
if (!Int32.TryParse(File.Name, out PID) || (Proc = Processes.FirstOrDefault(P => P.PID == PID)) == default(BuildHostPlatform.ProcessInfo))
{
// Delete stale files (it may happen if editor crashes).
File.Delete();
continue;
}
// Don't break here to allow clean-up of other stale files.
if (!bIsRunning)
{
// Otherwise check if the path matches.
bIsRunning = new FileReference(Proc.Filename) == EditorLocation;
}
}
}
}
}
return(bIsRunning);
}
/// <summary>
/// Main entry point. Parses any global options and initializes the logging system, then invokes the appropriate command.
/// </summary>
/// <param name="ArgumentsArray">Command line arguments</param>
/// <returns>Zero on success, non-zero on error</returns>
private static int Main(string[] ArgumentsArray)
{
SingleInstanceMutex Mutex = null;
try
{
// Start capturing performance info
Timeline.Start();
// Parse the command line arguments
CommandLineArguments Arguments = new CommandLineArguments(ArgumentsArray);
// Parse the global options
GlobalOptions Options = new GlobalOptions(Arguments);
// Configure the log system
Log.OutputLevel = Options.LogOutputLevel;
Log.IncludeTimestamps = Options.bLogTimestamps;
Log.IncludeProgramNameWithSeverityPrefix = Options.bLogFromMsBuild;
// Configure the progress writer
ProgressWriter.bWriteMarkup = Options.bWriteProgressMarkup;
// Add the log writer if requested. When building a target, we'll create the writer for the default log file later.
if (Options.LogFileName != null)
{
Log.AddFileWriter("LogTraceListener", Options.LogFileName);
}
// Ensure we can resolve any external assemblies that are not in the same folder as our assembly.
AssemblyUtils.InstallAssemblyResolver(Path.GetDirectoryName(Assembly.GetEntryAssembly().GetOriginalLocation()));
// Change the working directory to be the Engine/Source folder. We are likely running from Engine/Binaries/DotNET
// This is critical to be done early so any code that relies on the current directory being Engine/Source will work.
DirectoryReference.SetCurrentDirectory(UnrealBuildTool.EngineSourceDirectory);
// Get the type of the mode to execute, using a fast-path for the build mode.
Type ModeType = typeof(BuildMode);
if (Options.Mode != null)
{
// Find all the valid modes
Dictionary <string, Type> ModeNameToType = new Dictionary <string, Type>(StringComparer.OrdinalIgnoreCase);
foreach (Type Type in Assembly.GetExecutingAssembly().GetTypes())
{
if (Type.IsClass && !Type.IsAbstract && Type.IsSubclassOf(typeof(ToolMode)))
{
ToolModeAttribute Attribute = Type.GetCustomAttribute <ToolModeAttribute>();
if (Attribute == null)
{
throw new BuildException("Class '{0}' should have a ToolModeAttribute", Type.Name);
}
ModeNameToType.Add(Attribute.Name, Type);
}
}
// Try to get the correct mode
if (!ModeNameToType.TryGetValue(Options.Mode, out ModeType))
{
Log.TraceError("No mode named '{0}'. Available modes are:\n {1}", Options.Mode, String.Join("\n ", ModeNameToType.Keys));
return(1);
}
}
// Get the options for which systems have to be initialized for this mode
ToolModeOptions ModeOptions = ModeType.GetCustomAttribute <ToolModeAttribute>().Options;
// Start prefetching the contents of the engine folder
if ((ModeOptions & ToolModeOptions.StartPrefetchingEngine) != 0)
{
using (Timeline.ScopeEvent("FileMetadataPrefetch.QueueEngineDirectory()"))
{
FileMetadataPrefetch.QueueEngineDirectory();
}
}
// Read the XML configuration files
if ((ModeOptions & ToolModeOptions.XmlConfig) != 0)
{
using (Timeline.ScopeEvent("XmlConfig.ReadConfigFiles()"))
{
string XmlConfigMutexName = SingleInstanceMutex.GetUniqueMutexForPath("UnrealBuildTool_Mutex_XmlConfig", Assembly.GetExecutingAssembly().CodeBase);
using (SingleInstanceMutex XmlConfigMutex = new SingleInstanceMutex(XmlConfigMutexName, true))
{
FileReference XmlConfigCache = Arguments.GetFileReferenceOrDefault("-XmlConfigCache=", null);
XmlConfig.ReadConfigFiles(XmlConfigCache);
}
}
}
// Acquire a lock for this branch
if ((ModeOptions & ToolModeOptions.SingleInstance) != 0 && !Options.bNoMutex)
{
using (Timeline.ScopeEvent("SingleInstanceMutex.Acquire()"))
{
string MutexName = SingleInstanceMutex.GetUniqueMutexForPath("UnrealBuildTool_Mutex", Assembly.GetExecutingAssembly().CodeBase);
Mutex = new SingleInstanceMutex(MutexName, Options.bWaitMutex);
}
}
// Register all the build platforms
if ((ModeOptions & ToolModeOptions.BuildPlatforms) != 0)
{
using (Timeline.ScopeEvent("UEBuildPlatform.RegisterPlatforms()"))
{
UEBuildPlatform.RegisterPlatforms(false);
}
}
if ((ModeOptions & ToolModeOptions.BuildPlatformsForValidation) != 0)
{
using (Timeline.ScopeEvent("UEBuildPlatform.RegisterPlatforms()"))
{
UEBuildPlatform.RegisterPlatforms(true);
}
}
// Create the appropriate handler
ToolMode Mode = (ToolMode)Activator.CreateInstance(ModeType);
// Execute the mode
int Result = Mode.Execute(Arguments);
if ((ModeOptions & ToolModeOptions.ShowExecutionTime) != 0)
{
Log.TraceInformation("Total execution time: {0:0.00} seconds", Timeline.Elapsed.TotalSeconds);
}
return(Result);
}
catch (CompilationResultException Ex)
{
// Used to return a propagate a specific exit code after an error has occurred. Does not log any message.
Log.TraceLog(ExceptionUtils.FormatExceptionDetails(Ex));
return((int)Ex.Result);
}
catch (BuildException Ex)
{
// BuildExceptions should have nicely formatted messages. We can log these directly.
Log.TraceError(Ex.Message.ToString());
Log.TraceLog(ExceptionUtils.FormatExceptionDetails(Ex));
return((int)CompilationResult.OtherCompilationError);
}
catch (Exception Ex)
{
// Unhandled exception.
Log.TraceError("Unhandled exception: {0}", Ex);
Log.TraceLog(ExceptionUtils.FormatExceptionDetails(Ex));
return((int)CompilationResult.OtherCompilationError);
}
finally
{
// Cancel the prefetcher
using (Timeline.ScopeEvent("FileMetadataPrefetch.Stop()"))
{
FileMetadataPrefetch.Stop();
}
// Print out all the performance info
Timeline.Print(TimeSpan.FromMilliseconds(20.0), LogEventType.Log);
// Make sure we flush the logs however we exit
Trace.Close();
// Dispose of the mutex. Must be done last to ensure that another process does not startup and start trying to write to the same log file.
if (Mutex != null)
{
Mutex.Dispose();
}
}
}
/// <summary>
/// Dynamically compiles an assembly for the specified source file and loads that assembly into the application's
/// current domain. If an assembly has already been compiled and is not out of date, then it will be loaded and
/// no compilation is necessary.
/// </summary>
/// <param name="OutputAssemblyPath">Full path to the assembly to be created</param>
/// <param name="SourceFileNames">List of source file name</param>
/// <param name="ReferencedAssembies"></param>
/// <param name="PreprocessorDefines"></param>
/// <param name="DoNotCompile"></param>
/// <param name="TreatWarningsAsErrors"></param>
/// <returns>The assembly that was loaded</returns>
public static Assembly CompileAndLoadAssembly(FileReference OutputAssemblyPath, HashSet <FileReference> SourceFileNames, List <string> ReferencedAssembies = null, List <string> PreprocessorDefines = null, bool DoNotCompile = false, bool TreatWarningsAsErrors = false)
{
// Check to see if the resulting assembly is compiled and up to date
FileReference AssemblySourcesListFilePath = FileReference.Combine(OutputAssemblyPath.Directory, Path.GetFileNameWithoutExtension(OutputAssemblyPath.FullName) + "SourceFiles.txt");
bool bNeedsCompilation = false;
if (!DoNotCompile)
{
bNeedsCompilation = RequiresCompilation(SourceFileNames, AssemblySourcesListFilePath, OutputAssemblyPath);
}
// Load the assembly to ensure it is correct
Assembly CompiledAssembly = null;
if (!bNeedsCompilation)
{
try
{
// Load the previously-compiled assembly from disk
CompiledAssembly = Assembly.LoadFile(OutputAssemblyPath.FullName);
}
catch (FileLoadException Ex)
{
Log.TraceInformation(String.Format("Unable to load the previously-compiled assembly file '{0}'. Unreal Build Tool will try to recompile this assembly now. (Exception: {1})", OutputAssemblyPath, Ex.Message));
bNeedsCompilation = true;
}
catch (BadImageFormatException Ex)
{
Log.TraceInformation(String.Format("Compiled assembly file '{0}' appears to be for a newer CLR version or is otherwise invalid. Unreal Build Tool will try to recompile this assembly now. (Exception: {1})", OutputAssemblyPath, Ex.Message));
bNeedsCompilation = true;
}
catch (FileNotFoundException)
{
throw new BuildException("Precompiled rules assembly '{0}' does not exist.", OutputAssemblyPath);
}
catch (Exception Ex)
{
throw new BuildException(Ex, "Error while loading previously-compiled assembly file '{0}'. (Exception: {1})", OutputAssemblyPath, Ex.Message);
}
}
// Compile the assembly if me
if (bNeedsCompilation)
{
using (Timeline.ScopeEvent(String.Format("Compiling rules assembly ({0})", OutputAssemblyPath.GetFileName())))
{
CompiledAssembly = CompileAssembly(OutputAssemblyPath, SourceFileNames, ReferencedAssembies, PreprocessorDefines, TreatWarningsAsErrors);
}
// Save out a list of all the source files we compiled. This is so that we can tell if whole files were added or removed
// since the previous time we compiled the assembly. In that case, we'll always want to recompile it!
FileReference.WriteAllLines(AssemblySourcesListFilePath, SourceFileNames.Select(x => x.FullName));
}
#if !NET_CORE
// Load the assembly into our app domain
try
{
AppDomain.CurrentDomain.Load(CompiledAssembly.GetName());
}
catch (Exception Ex)
{
throw new BuildException(Ex, "Unable to load the compiled build assembly '{0}' into our application's domain. (Exception: {1})", OutputAssemblyPath, Ex.Message);
}
#endif
return(CompiledAssembly);
}
/// <summary>
/// Creates a rules assembly
/// </summary>
/// <param name="Scope">Scope for items created from this assembly</param>
/// <param name="RootDirectories">The root directories to create rules for</param>
/// <param name="AssemblyPrefix">A prefix for the assembly file name</param>
/// <param name="Plugins">List of plugins to include in this assembly</param>
/// <param name="bReadOnly">Whether the assembly should be marked as installed</param>
/// <param name="bSkipCompile">Whether to skip compilation for this assembly</param>
/// <param name="Parent">The parent rules assembly</param>
/// <returns>New rules assembly</returns>
private static RulesAssembly CreateEngineOrEnterpriseRulesAssembly(RulesScope Scope, List <DirectoryReference> RootDirectories, string AssemblyPrefix, IReadOnlyList <PluginInfo> Plugins, bool bReadOnly, bool bSkipCompile, RulesAssembly Parent)
{
// Scope hierarchy
RulesScope PluginsScope = new RulesScope(Scope.Name + " Plugins", Scope);
RulesScope ProgramsScope = new RulesScope(Scope.Name + " Programs", PluginsScope);
// Find the shared modules, excluding the programs directory. These are used to create an assembly with the bContainsEngineModules flag set to true.
Dictionary <FileReference, ModuleRulesContext> ModuleFileToContext = new Dictionary <FileReference, ModuleRulesContext>();
ModuleRulesContext DefaultModuleContext = new ModuleRulesContext(Scope, RootDirectories[0]);
foreach (DirectoryReference RootDirectory in RootDirectories)
{
using (Timeline.ScopeEvent("Finding engine modules"))
{
DirectoryReference SourceDirectory = DirectoryReference.Combine(RootDirectory, "Source");
AddEngineModuleRulesWithContext(SourceDirectory, "Runtime", DefaultModuleContext, UHTModuleType.EngineRuntime, ModuleFileToContext);
AddEngineModuleRulesWithContext(SourceDirectory, "Developer", DefaultModuleContext, UHTModuleType.EngineDeveloper, ModuleFileToContext);
AddEngineModuleRulesWithContext(SourceDirectory, "Editor", DefaultModuleContext, UHTModuleType.EngineEditor, ModuleFileToContext);
AddEngineModuleRulesWithContext(SourceDirectory, "ThirdParty", DefaultModuleContext, UHTModuleType.EngineThirdParty, ModuleFileToContext);
}
}
// Add all the plugin modules too (don't need to loop over RootDirectories since the plugins come in already found
using (Timeline.ScopeEvent("Finding plugin modules"))
{
ModuleRulesContext PluginsModuleContext = new ModuleRulesContext(PluginsScope, RootDirectories[0]);
FindModuleRulesForPlugins(Plugins, PluginsModuleContext, ModuleFileToContext);
}
// Create the assembly
FileReference EngineAssemblyFileName = FileReference.Combine(RootDirectories[0], "Intermediate", "Build", "BuildRules", AssemblyPrefix + "Rules" + FrameworkAssemblyExtension);
RulesAssembly EngineAssembly = new RulesAssembly(Scope, RootDirectories[0], Plugins, ModuleFileToContext, new List <FileReference>(), EngineAssemblyFileName, bContainsEngineModules: true, DefaultBuildSettings: BuildSettingsVersion.Latest, bReadOnly: bReadOnly, bSkipCompile: bSkipCompile, Parent: Parent);
List <FileReference> ProgramTargetFiles = new List <FileReference>();
Dictionary <FileReference, ModuleRulesContext> ProgramModuleFiles = new Dictionary <FileReference, ModuleRulesContext>();
foreach (DirectoryReference RootDirectory in RootDirectories)
{
DirectoryReference SourceDirectory = DirectoryReference.Combine(RootDirectory, "Source");
DirectoryReference ProgramsDirectory = DirectoryReference.Combine(SourceDirectory, "Programs");
// Also create a scope for them, and update the UHT module type
ModuleRulesContext ProgramsModuleContext = new ModuleRulesContext(ProgramsScope, RootDirectory);
ProgramsModuleContext.DefaultUHTModuleType = UHTModuleType.Program;
using (Timeline.ScopeEvent("Finding program modules"))
{
// Find all the rules files
AddModuleRulesWithContext(ProgramsDirectory, ProgramsModuleContext, ProgramModuleFiles);
}
using (Timeline.ScopeEvent("Finding program targets"))
{
ProgramTargetFiles.AddRange(FindAllRulesFiles(SourceDirectory, RulesFileType.Target));
}
}
// Create a path to the assembly that we'll either load or compile
FileReference ProgramAssemblyFileName = FileReference.Combine(RootDirectories[0], "Intermediate", "Build", "BuildRules", AssemblyPrefix + "ProgramRules" + FrameworkAssemblyExtension);
RulesAssembly ProgramAssembly = new RulesAssembly(ProgramsScope, RootDirectories[0], new List <PluginInfo>().AsReadOnly(), ProgramModuleFiles, ProgramTargetFiles, ProgramAssemblyFileName, bContainsEngineModules: false, DefaultBuildSettings: BuildSettingsVersion.Latest, bReadOnly: bReadOnly, bSkipCompile: bSkipCompile, Parent: EngineAssembly);
// Return the combined assembly
return(ProgramAssembly);
}