Program.cs

using System;
using System.IO;
using System.Linq;

namespace compiler
{
    class Program
    {
        static void Main(string[] args)
        {
            ConsoleLogger.Verbosity = Verbosity.Debugging;

            if (args.Length != 2)
            {
                ConsoleLogger.WriteLine("Invalid Arguments", Verbosity.Error);
                return;
            }

            var sourceDirectory = args[0];
            var targetDirectory = args[1];

            if (Directory.Exists(targetDirectory))
            {
                Directory.Delete(targetDirectory, true);
            }

            var sourceFiles = Directory.GetFiles(sourceDirectory, "*.uml", SearchOption.AllDirectories);
            foreach (var sourceFile in sourceFiles)
            {
                var baseName = sourceFile.Substring(sourceDirectory.Length + 1);

                Console.WriteLine("Processing file: " + baseName);
                var rootNodes = TestParser.ReadFile(sourceFile).ToList();

                for (var i = 0; i < rootNodes.Count; i++)
                {
                    var rootNode = rootNodes[i];
                    var path = Path.Combine(targetDirectory, @$"{baseName}-{i}");
                    Directory.CreateDirectory(path);
                    TestWriter.WriteAll(path, rootNode);
                }
            }
        }
    }
}