...

src/lang/Nub.Lang.CLI/Nub.Lang.CLI.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <AssemblyName>nub</AssemblyName>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <PublishAot>true</PublishAot>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Nub.Lang\Nub.Lang.csproj" />
+    </ItemGroup>
+
+</Project>

src/lang/Nub.Lang.CLI/Program.cs

@@ -0,0 +1,57 @@
+using Nub.Lang.Backend;
+using Nub.Lang.Frontend.Diagnostics;
+using Nub.Lang.Frontend.Lexing;
+using Nub.Lang.Frontend.Parsing;
+using Nub.Lang.Frontend.Typing;
+
+if (args.Length != 1)
+{
+    Console.Error.WriteLine("Usage:       nub <input-dir>");
+    Console.Error.WriteLine("Example:     nub src");
+    return 1;
+}
+
+var srcDir = Path.GetFullPath(args[0]);
+
+if (!Directory.Exists(srcDir))
+{
+    Console.Error.WriteLine($"Error: Input directory '{srcDir}' does not exist.");
+    return 1;
+}
+
+var error = false;
+var lexer = new Lexer();
+var parser = new Parser();
+var typeChecker = new TypeChecker();
+
+List<SourceFile> files = [];
+foreach (var file in Directory.EnumerateFiles(srcDir, "*.nub", SearchOption.AllDirectories))
+{
+    var content = File.ReadAllText(file);
+
+    var tokenizeResult = lexer.Tokenize(new SourceText(file, content));
+    tokenizeResult.PrintAllDiagnostics();
+    error = error || tokenizeResult.HasErrors;
+
+    var parseResult = parser.ParseModule(tokenizeResult.Value);
+    parseResult.PrintAllDiagnostics();
+    error = error || parseResult.HasErrors;
+
+    if (parseResult.Value != null)
+    {
+        files.Add(parseResult.Value);
+    }
+}
+
+var typeCheckResult = typeChecker.TypeCheck(files);
+typeCheckResult.PrintAllDiagnostics();
+error = error || typeCheckResult.HasErrors;
+
+if (error) return 1;
+
+var generator = new Generator();
+var result = generator.Generate(files);
+
+Console.Out.Write(result);
+
+return 0;