Support Nix environment

.github/workflows/build.yml

@@ -215,3 +215,31 @@ jobs:
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v4
+
+  build-nix:
+    name: Nix
+    runs-on: ubuntu-latest
+    if: github.repository == 'doldecomp/melee'
+    env:
+      REGISTRY: ghcr.io
+      IMAGE: doldecomp/build-melee:main
+    steps:
+    - uses: actions/checkout@v4
+    - name: Log into container registry
+      uses: docker/login-action@v2
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Grab Melee DOL
+      run: |
+        image="$REGISTRY/$IMAGE"
+        docker pull "$image"
+        container_id=$(docker create "$image")
+        docker cp "$container_id":/orig .
+    - uses: cachix/install-nix-action@v25
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: DeterminateSystems/magic-nix-cache-action@v2
+    - run: nix-build
+    - run: nix-shell --run "echo OK"

.nix/.editorconfig

@@ -0,0 +1,2 @@
+[*.nix]
+indent_size = 2

.nix/decomp-toolkit.nix

@@ -0,0 +1,34 @@
+{ lib
+, fetchFromGitHub
+, git
+, rustPlatform
+, stdenv
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "decomp-toolkit";
+  version = "0.7.3";
+
+  src = fetchFromGitHub {
+    owner = "encounter";
+    repo = "decomp-toolkit";
+    rev = "v${version}";
+    hash = "sha256-cpHaoxRr/Lyx6tpyUx7Sm+9h0BicrO+jVJA09BBgKJ4=";
+  };
+
+  nativeBuildInputs = [
+    git
+  ];
+
+  cargoLock.lockFile = "${src}/Cargo.lock";
+  cargoLock.outputHashes."ar-0.8.0" = "sha256-OLyo+cRRWMsI1i8NsgsBKRJH1XsKW1CculQnJ/wcya0=";
+  cargoLock.outputHashes."dol-0.1.0" = "sha256-YfMXWNtmZJhK39R3w98DEGm4y9x59osFGliG36BcuLU=";
+
+  meta = with lib; {
+    description = "A GameCube & Wii decompilation toolkit";
+    homepage = "https://github.com/encounter/decomp-toolkit";
+    license = with licenses; [ asl20 mit ];
+    maintainers = with maintainers; [ r-burns ];
+    mainProgram = "dtk";
+  };
+}

.nix/default.nix

@@ -0,0 +1,17 @@
+{
+  sources ? import ./sources.nix,
+}:
+let
+  pkgs = import sources.nixpkgs {
+    overlays = [
+      (self: super: {
+        decomp-toolkit = super.callPackage ./decomp-toolkit.nix {};
+        devkitppc = super.callPackage ./devkitppc.nix {};
+        mwcc = super.callPackage ./mwcc.nix {};
+        wibo = super.pkgsi686Linux.callPackage ./wibo.nix {};
+      })
+    ];
+  };
+in
+
+pkgs.callPackage ./melee.nix {}

.nix/devkitppc.nix

@@ -0,0 +1,41 @@
+{ stdenvNoCC, lib
+, buildEnv
+, fetchFromGitHub
+, fetchpatch
+, makeWrapper
+, overrideCC
+, pkgsCross
+}:
+
+let
+  version = "43";
+
+  tag = "devkitPPC_r${version}";
+
+  ppcCrossBinutils = pkgsCross.ppc-embedded.buildPackages.binutils-unwrapped;
+
+  bintools' = ppcCrossBinutils.overrideAttrs (oa: {
+    patches = oa.patches ++ [
+      (fetchpatch {
+        url = "https://raw.githubusercontent.com/devkitPro/buildscripts/${tag}/dkppc/patches/binutils-${oa.version}.patch";
+        hash = "sha256-IOqa20LQYBxfR1KKxkp0hVV21CKd9IZrvNeEyuW09us=";
+      })
+    ];
+  });
+in
+stdenvNoCC.mkDerivation {
+  pname = "devkitppc";
+  inherit version;
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+  buildCommand = ''
+    for bindir in '${lib.getBin bintools'}/bin'; do
+      cd "$bindir"
+      for f in powerpc-none-eabi-*; do
+        short="$(echo "$f" | sed s/powerpc-none-eabi-/powerpc-eabi-/)"
+        makeWrapper "$bindir/$f" "$out/bin/$short"
+      done
+    done
+  '';
+}

.nix/melee.nix

@@ -0,0 +1,62 @@
+{ lib
+, stdenv
+, decomp-toolkit
+, devkitppc
+, fetchurl
+, mwcc
+, ninja
+, python3
+, wibo
+}:
+let
+  sjiswrap = fetchurl {
+    url = "https://github.com/encounter/sjiswrap/releases/download/v1.1.1/sjiswrap-windows-x86.exe";
+    hash = "sha256-J6PF1PJj5OuW5WGc/Noi9F0zzNEhEEx/9qN+FbP0J80=";
+  };
+in
+stdenv.mkDerivation {
+  name = "doldecomp-melee";
+
+  src = lib.cleanSourceWith {
+    filter = name: type: let
+      basename = baseNameOf (toString name);
+    in !(false
+      || basename == "build"
+      || basename == "expected"
+      || lib.hasSuffix ".nix" basename
+      || lib.hasSuffix ".dump" basename
+      || lib.hasSuffix ".o" basename
+    );
+    src = lib.cleanSource ../.;
+  };
+
+  shellHook = ''
+    runHook postPatch
+  '';
+
+  nativeBuildInputs = [
+    decomp-toolkit
+    devkitppc
+    ninja
+    python3
+    wibo
+  ];
+
+  configurePhase = ''
+    runHook preConfigure
+    python3 ./configure.py --wrapper ${wibo}/bin/wibo \
+      --build-dtk ${decomp-toolkit}/bin/dtk \
+      --sjiswrap ${sjiswrap} \
+      --compilers ${mwcc}
+    runHook postConfigure
+  '';
+
+  enableParallelBuilding = true;
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out
+    cp build/GALE01/main.dol $out/
+    runHook postInstall
+  '';
+}

.nix/mwcc.nix

@@ -0,0 +1,23 @@
+{ lib
+, stdenv
+, fetchzip
+}:
+stdenv.mkDerivation {
+  name = "GC_WII_COMPILERS";
+  src = fetchzip {
+    url = "https://files.decomp.dev/compilers_20230715.zip";
+    stripRoot = false;
+    sha256 = "sha256-IX3byvEUVJB6Rmc+NqO9ZNt1jl95nQpEIqxbHI+uUio=";
+  };
+  # Patch 1.1 linker to not read garbage from stack.
+  # Fixes random crashes under wibo.
+  postPatch = ''
+    printf '\x51' | dd of=GC/1.1/mwldeppc.exe bs=1 seek=130933 count=1 conv=notrunc
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    cp -r . $out/
+    runHook postInstall
+  '';
+}

.nix/shell.nix

@@ -0,0 +1,26 @@
+{
+  sources ? import ./sources.nix,
+}:
+let
+  pkgs = import sources.nixpkgs {
+    overlays = [
+      (self: super: {
+        decomp-toolkit = super.callPackage ./decomp-toolkit.nix {};
+        devkitppc = super.callPackage ./devkitppc.nix {};
+        mwcc = super.callPackage ./mwcc.nix {};
+        wibo = super.pkgsi686Linux.callPackage ./wibo.nix {};
+      })
+    ];
+  };
+
+  melee = import ./default.nix { inherit sources; };
+in
+
+melee.overrideAttrs (oa: {
+  nativeBuildInputs = oa.nativeBuildInputs ++ [
+    (pkgs.clang-tools.override {
+      llvmPackages = pkgs.llvmPackages_15;
+    })
+    pkgs.clang.cc.python
+  ];
+})

.nix/sources.json

@@ -0,0 +1,14 @@
+{
+    "nixpkgs": {
+        "branch": "nixos-unstable",
+        "description": "Nix Packages collection",
+        "homepage": "",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "73de017ef2d18a04ac4bfd0c02650007ccb31c2a",
+        "sha256": "1v9sy2i2dy3qksx4mf81gwzfl0jzpqccfkzq7fjxgq832f9d255i",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/73de017ef2d18a04ac4bfd0c02650007ccb31c2a.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}