more renaming

src/compiler/Nub.Lang/Program.cs

@@ -0,0 +1,87 @@
+using Nub.Lang.Backend;
+using Nub.Lang.Frontend.Lexing;
+using Nub.Lang.Frontend.Parsing;
+using Nub.Lang.Frontend.Typing;
+
+namespace Nub.Lang;
+
+internal static class Program
+{
+    private static readonly Lexer Lexer = new();
+    private static readonly Parser Parser = new();
+    
+    public static int Main(string[] args)
+    {
+        if (args.Length != 2)
+        {
+            Console.WriteLine("Usage:       nub <input-dir> <output-file>");
+            Console.WriteLine("Example:     nub src out.asm");
+            return 1;
+        }
+        
+        var input = Path.GetFullPath(args[0]);
+        var output = Path.GetFullPath(args[1]);
+        
+        if (!Directory.Exists(input))
+        {
+            Console.WriteLine($"Error: Input directory '{input}' does not exist.");
+            return 1;
+        }
+        
+        var outputDir = Path.GetDirectoryName(output);
+        if (outputDir == null || !Directory.Exists(outputDir))
+        {
+            Console.WriteLine($"Error: Output directory '{outputDir}' does not exist.");
+            return 1;
+        }
+
+        if (string.IsNullOrWhiteSpace(Path.GetFileName(output)))
+        {
+            Console.WriteLine("Error: Output path must specify a file, not a directory.");
+            return 1;
+        }
+
+        var modules = RunFrontend(input);
+        var definitions = modules.SelectMany(f => f.Definitions).ToList();
+
+        var typer = new ExpressionTyper(definitions);
+        typer.Populate();
+
+        var generator = new Generator(definitions);
+        var result = generator.Generate();
+
+        File.WriteAllText(output, result);
+        return 0;
+    }
+
+    private static List<ModuleNode> RunFrontend(string path)
+    {
+        List<ModuleNode> modules = [];
+        RunFrontend(path, modules);
+        return modules;
+    }
+
+    private static void RunFrontend(string path, List<ModuleNode> modules)
+    {
+        var files = Directory.EnumerateFiles(path, "*.nub", SearchOption.TopDirectoryOnly);
+
+        List<Token> tokens = [];
+        foreach (var file in files)
+        {
+            var src = File.ReadAllText(file);
+            tokens.AddRange(Lexer.Lex(src));
+        }
+
+        var module = Parser.ParseModule(tokens, path);
+        modules.Add(module);
+
+        foreach (var import in module.Imports)
+        {
+            var importPath = Path.GetFullPath(import, module.Path);
+            if (modules.All(m => m.Path != importPath))
+            {
+                RunFrontend(importPath, modules);
+            }
+        }
+    }
+}