From 6b7cd0132dc4b944e1b3e14a878bb6ff46eb8a4e Mon Sep 17 00:00:00 2001
From: nub31 <oliverlhs@outlook.com>
Date: Thu, 16 Oct 2025 23:36:06 +0200
Subject: [PATCH] Begin to add support for header file generation

---
 compiler/NubLang.CLI/Program.cs | 72 ++++++++++++++++++++++++++++++++-
 examples/raylib/makefile        |  7 +++-
 2 files changed, 75 insertions(+), 4 deletions(-)

diff --git a/compiler/NubLang.CLI/Program.cs b/compiler/NubLang.CLI/Program.cs
index 94ca549..b952f2a 100644
--- a/compiler/NubLang.CLI/Program.cs
+++ b/compiler/NubLang.CLI/Program.cs
@@ -5,10 +5,78 @@ using NubLang.Generation;
 using NubLang.Modules;
 using NubLang.Syntax;
 
-var diagnostics = new List<Diagnostic>();
+List<string> files = [];
+List<string> headerFiles = [];
 
+for (var i = 0; i < args.Length; i++)
+{
+    if (args[i] == "-h")
+    {
+        i += 1;
+        if (i > args.Length - 1)
+        {
+            Console.Error.WriteLine("Expected argument after -h");
+        }
+
+        headerFiles.Add(args[i]);
+    }
+    else
+    {
+        files.Add(args[i]);
+    }
+}
+
+var diagnostics = new List<Diagnostic>();
 var syntaxTrees = new List<SyntaxTree>();
-foreach (var file in args)
+
+foreach (var headerFile in headerFiles)
+{
+    using var bindingsGenerateProc = new Process();
+    // todo(nub31): Embed python file to remove absolute path
+    bindingsGenerateProc.StartInfo = new ProcessStartInfo("python3", ["/home/oliste/repos/nub-lang/bindings/generate.py", headerFile])
+    {
+        RedirectStandardOutput = true,
+        RedirectStandardError = true,
+        CreateNoWindow = true,
+        UseShellExecute = false,
+    };
+
+    bindingsGenerateProc.Start();
+
+    var output = await bindingsGenerateProc.StandardOutput.ReadToEndAsync();
+    var error = await bindingsGenerateProc.StandardError.ReadToEndAsync();
+
+    await bindingsGenerateProc.WaitForExitAsync();
+
+    if (bindingsGenerateProc.ExitCode != 0)
+    {
+        Console.Error.WriteLine($"Failed to automatically generate bindings for header file {headerFile}\n{error}");
+        return 1;
+    }
+
+    var tokenizer = new Tokenizer(headerFile, output);
+    tokenizer.Tokenize();
+    diagnostics.AddRange(tokenizer.Diagnostics);
+
+    if (tokenizer.Diagnostics.Any(x => x.Severity == DiagnosticSeverity.Error))
+    {
+        Console.Error.WriteLine($"Binding generator produced invalid syntax for header file {headerFile}");
+        return 1;
+    }
+
+    var parser = new Parser();
+    var syntaxTree = parser.Parse(tokenizer.Tokens);
+
+    if (parser.Diagnostics.Any(x => x.Severity == DiagnosticSeverity.Error))
+    {
+        Console.Error.WriteLine($"Binding generator produced invalid syntax tree for header file {headerFile}");
+        return 1;
+    }
+
+    syntaxTrees.Add(syntaxTree);
+}
+
+foreach (var file in files)
 {
     var tokenizer = new Tokenizer(file, File.ReadAllText(file));
     tokenizer.Tokenize();
diff --git a/examples/raylib/makefile b/examples/raylib/makefile
index 88c9aa2..213489f 100644
--- a/examples/raylib/makefile
+++ b/examples/raylib/makefile
@@ -3,8 +3,11 @@ NUBC = ../../compiler/NubLang.CLI/bin/Debug/net9.0/nubc
 out: .build/out.o
 	gcc -nostartfiles -lm -o out x86_64.s .build/out.o raylib-5.5_linux_amd64/lib/libraylib.a
 
-.build/out.o: $(NUBC) main.nub raylib.nub
-	$(NUBC) main.nub raylib.nub
+# .build/out.o: $(NUBC) main.nub raylib.nub
+# 	$(NUBC) main.nub raylib.nub
+
+.build/out.o: $(NUBC) main.nub
+	$(NUBC) main.nub -h raylib-5.5_linux_amd64/include/raylib.h
 
 .PHONY: $(NUBC)
 $(NUBC):