Nix development env for linux

.github/workflows/linux.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-22.04]
+        os: [ubuntu-24.04]
         arch: [x64]
         mode: [debug]
 
@@ -25,41 +25,16 @@ jobs:
         git submodule sync --recursive
         git submodule update --init --force --recursive --depth=1
 
-    # Install dependencies
-    - name: Update apt repositories
-      run: sudo apt-get update
-
-    - name: Install GCC12
-      shell: bash
-      run:  |
-          sudo apt update
-          sudo apt install gcc-12 g++-12
-          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 110 --slave /usr/bin/g++ g++ /usr/bin/g++-12 --slave /usr/bin/gcov gcov /usr/bin/gcov-12
-
-    # Install xmake
-    - name: Setup xmake
-      uses: xmake-io/github-action-setup-xmake@v1
+    - name: Setup development environment with nix
+      uses: cachix/install-nix-action@v27
       with:
-        xmake-version: '2.9.3'
+        github_access_token: ${{ secrets.GH_TOKEN }}
 
-    # Update xmake repository (in order to have the file that will be cached)
-    - name: Update xmake repository
-      run: xmake repo --update
+    - run: nix flake check
 
-    # Setup compilation mode and install project dependencies
-    - name: Configure xmake and install dependencies
-      run: xmake config --arch=${{ matrix.arch }} --mode=${{ matrix.mode }} --yes
+    # Kickoff install in its own step - it will be cached anyway
+    - name: Fetch build tools
+      run: nix develop
 
-    # Build the game
     - name: Build
-      run: xmake
-
-    # Create install
-    #- name: Install
-    # run: xmake install -o packaged
-
-    # Upload artifacts
-    #- uses: actions/upload-artifact@v2
-    #  with:
-    #    name: ${{ matrix.os }}-${{ matrix.arch }}-${{ matrix.mode }}
-    #    path: packaged/bin/**
+      run: nix develop --command bash -c 'xmake config --arch=${{ matrix.arch }} --mode=${{ matrix.mode }} --yes && xmake'

.gitignore

@@ -88,3 +88,5 @@ distrib_releasedbg/
 new_addresses.txt
 
 packaged/*
+
+makefile

flake.nix

@@ -0,0 +1,58 @@
+{
+  description = "Tilted C++ development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [
+           # msvc-llvm-nix.overlay
+        ];
+        pkgs = import nixpkgs {
+          inherit system overlays;
+          config.allowUnfree = true;  # In case MSVC toolchain is unfree
+        };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            gcc14
+            gdb
+            libclang
+            cmake
+            xmake
+            gnumake
+            stdenv.cc.cc.lib
+            mold
+            #msvc-toolchain
+          ];
+
+          shellHook = ''
+            # Unset environment variables, required for xmake to find
+            # the linker/compiler that we provide here
+            unset CC
+            unset CXX
+            unset LD
+            unset AR
+            unset AS
+            unset RANLIB
+            unset STRIP
+            unset CFLAGS
+            unset CXXFLAGS
+            unset LDFLAGS
+            export LD_LIBRARY_PATH=${pkgs.lib.makeLibraryPath [
+                pkgs.stdenv.cc.cc
+            ]}
+            export CC="${pkgs.gcc14}/bin/gcc"
+            export CXX="${pkgs.gcc14}/bin/g++"
+            export LD="${pkgs.mold}/bin/mold"
+
+            echo "C++ development environment loaded"
+          '';
+        };
+      });
+}