From c77773a8436f29fb2283da5aed279a59ff11af18 Mon Sep 17 00:00:00 2001
From: Werner Kroneman <werner@wernerkroneman.nl>
Date: Wed, 11 Sep 2024 16:37:20 +0200
Subject: [PATCH] Minimal example.

---
 CMakeLists.txt | 17 +++++++++++++++++
 flake.lock     | 27 +++++++++++++++++++++++++++
 flake.nix      | 44 ++++++++++++++++++++++++++++++++++++++++++++
 main.cpp       | 13 +++++++++++++
 module.cppm    | 20 ++++++++++++++++++++
 5 files changed, 121 insertions(+)
 create mode 100644 CMakeLists.txt
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 main.cpp
 create mode 100644 module.cppm

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..b7f8858
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.8)
+project(test_project)
+
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_SCAN_FOR_MODULES ON)
+
+add_executable(modules_test)
+target_sources(modules_test
+        PRIVATE main.cpp
+        PUBLIC FILE_SET CXX_MODULES FILES module.cppm
+)
+
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..994aa04
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1725930920,
+        "narHash": "sha256-RVhD9hnlTT2nJzPHlAqrWqCkA7T6CYrP41IoVRkciZM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "44a71ff39c182edaf25a7ace5c9454e7cba2c658",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..c2f8f33
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,44 @@
+{
+
+  nixConfig.bash-prompt = "[shell $(pwd)]$ ";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
+  };
+
+  outputs = { self, nixpkgs, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs { inherit system; };
+    in
+    {
+
+      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixpkgs-fmt;
+
+      packages.x86_64-linux.default = pkgs.llvmPackages_17.libcxxStdenv.mkDerivation {
+        name = "modules_test";
+        src = ./.;
+        nativeBuildInputs = with pkgs; [
+          cmake
+          llvmPackages_17.clang-tools
+          ninja
+        ];
+        buildInputs = with pkgs; [
+          llvmPackages_17.clang-tools
+        ];
+        configurePhase = ''
+          cmake . -GNinja
+        '';
+
+        buildPhase = ''
+          ninja modules_test
+        '';
+
+        installPhase = ''
+          ls
+          mkdir -p $out/bin
+          cp modules_test $out/bin
+        '';
+      };
+    };
+}
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..68a920b
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,13 @@
+// Copyright (c) 2024 University College Roosevelt
+//
+// All rights reserved.
+
+//
+// Created by werner on 9/11/24.
+//
+
+import Foomod;
+
+int main() {
+	return add(1,2);
+}
\ No newline at end of file
diff --git a/module.cppm b/module.cppm
new file mode 100644
index 0000000..88788ca
--- /dev/null
+++ b/module.cppm
@@ -0,0 +1,20 @@
+// Copyright (c) 2024 University College Roosevelt
+//
+// All rights reserved.
+
+//
+// Created by werner on 9/11/24.
+//
+
+module;
+
+#include <iostream>
+
+export module Foomod;
+
+export int add(int a, int b) {
+
+	std::cout << "Look at me using iostream!" << std::endl;
+
+	return a + b;
+}