/// <summary>
        /// Writes the current progress
        /// </summary>
        /// <param name="Numerator">Numerator for the progress fraction</param>
        /// <param name="Denominator">Denominator for the progress fraction</param>
        public void Write(int Numerator, int Denominator)
        {
            float  ProgressValue  = Denominator > 0 ? ((float)Numerator / (float)Denominator) : 1.0f;
            string ProgressString = String.Format("{0}%", Math.Round(ProgressValue * 100.0f));

            if (ProgressString != CurrentProgressString)
            {
                CurrentProgressString = ProgressString;
                if (bWriteMarkup)
                {
                    Log.WriteLine(LogEventType.Console, "@progress '{0}' {1}", Message, ProgressString);
                }
                if (Status != null)
                {
                    Status.SetProgress(ProgressString);
                }
            }
        }
        /// <summary>
        /// Main entry point for the command
        /// </summary>
        public override void ExecuteBuild()
        {
            // Build a lookup of flags to set and clear for each identifier
            Dictionary <string, int> IdentifierToIndex = new Dictionary <string, int>();

            for (int Idx = 0; Idx < MacroPairs.GetLength(0); Idx++)
            {
                IdentifierToIndex[MacroPairs[Idx, 0]] = Idx;
                IdentifierToIndex[MacroPairs[Idx, 1]] = ~Idx;
            }

            // Check if we want to just parse a single file
            string FileParam = ParseParamValue("File");

            if (FileParam != null)
            {
                // Check the file exists
                FileReference File = new FileReference(FileParam);
                if (!FileReference.Exists(File))
                {
                    throw new AutomationException("File '{0}' does not exist", File);
                }
                CheckSourceFile(File, IdentifierToIndex, new object());
            }
            else
            {
                // Add the additional files to be ignored
                foreach (string IgnoreFileName in ParseParamValues("Ignore"))
                {
                    IgnoreFileNames.Add(IgnoreFileName);
                }

                // Create a list of all the root directories
                HashSet <DirectoryReference> RootDirs = new HashSet <DirectoryReference>();
                RootDirs.Add(EngineDirectory);

                // Add the enterprise directory
                DirectoryReference EnterpriseDirectory = DirectoryReference.Combine(RootDirectory, "Enterprise");
                if (DirectoryReference.Exists(EnterpriseDirectory))
                {
                    RootDirs.Add(EnterpriseDirectory);
                }

                // Add the project directories
                string[] ProjectParams = ParseParamValues("Project");
                foreach (string ProjectParam in ProjectParams)
                {
                    FileReference ProjectFile = new FileReference(ProjectParam);
                    if (!FileReference.Exists(ProjectFile))
                    {
                        throw new AutomationException("Unable to find project '{0}'", ProjectFile);
                    }
                    RootDirs.Add(ProjectFile.Directory);
                }

                // Recurse through the tree
                LogInformation("Finding source files...");
                List <FileReference> SourceFiles = new List <FileReference>();
                using (ThreadPoolWorkQueue Queue = new ThreadPoolWorkQueue())
                {
                    foreach (DirectoryReference RootDir in RootDirs)
                    {
                        DirectoryInfo PluginsDir = new DirectoryInfo(Path.Combine(RootDir.FullName, "Plugins"));
                        if (PluginsDir.Exists)
                        {
                            Queue.Enqueue(() => FindSourceFiles(PluginsDir, SourceFiles, Queue));
                        }

                        DirectoryInfo SourceDir = new DirectoryInfo(Path.Combine(RootDir.FullName, "Source"));
                        if (SourceDir.Exists)
                        {
                            Queue.Enqueue(() => FindSourceFiles(SourceDir, SourceFiles, Queue));
                        }
                    }
                    Queue.Wait();
                }

                // Loop through all the source files
                using (ThreadPoolWorkQueue Queue = new ThreadPoolWorkQueue())
                {
                    object LogLock = new object();
                    foreach (FileReference SourceFile in SourceFiles)
                    {
                        Queue.Enqueue(() => CheckSourceFile(SourceFile, IdentifierToIndex, LogLock));
                    }

                    using (LogStatusScope Scope = new LogStatusScope("Checking source files..."))
                    {
                        while (!Queue.Wait(10 * 1000))
                        {
                            Scope.SetProgress("{0}/{1}", SourceFiles.Count - Queue.NumRemaining, SourceFiles.Count);
                        }
                    }
                }
            }
        }