ZigCraft/flake.nix at main · OpenStaticFish/ZigCraft · GitHub

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{
  description = "Zig 0.14 SDL3 Vulkan Voxel Engine";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";

    # Zig 0.14 is currently development/master.
    # We use an overlay to get the latest compiler.
    zig-overlay.url = "github:mitchellh/zig-overlay";
    zig-overlay.inputs.nixpkgs.follows = "nixpkgs";
    zig-overlay.inputs.flake-utils.follows = "flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils, zig-overlay }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ zig-overlay.overlays.default ];
        };

        # Select Zig 0.14 (master/nightly)
        zig = pkgs.zigpkgs.master;
      in
      {
        packages.default = pkgs.stdenv.mkDerivation {
          pname = "zigcraft";
          version = "0.1.0";
          src = ./.;

          nativeBuildInputs = [
            zig
            pkgs.pkg-config
            pkgs.patchelf
            pkgs.makeWrapper
          ];

          buildInputs = [
            pkgs.sdl3
            pkgs.vulkan-loader
            pkgs.vulkan-headers
            pkgs.vulkan-validation-layers
          ];

          # Disable hardening to fix "__builtin_va_arg_pack" error during C import
          hardeningDisable = [ "all" ];

          dontConfigure = true;
          dontBuild = true;

          installPhase = ''
            export ZIG_GLOBAL_CACHE_DIR=$TMPDIR/zig-cache
            zig build -Doptimize=Debug -Dtarget=x86_64-linux-gnu --prefix $out
          '';

          postFixup = ''
            patchelf --add-rpath ${pkgs.lib.makeLibraryPath [ pkgs.sdl3 pkgs.vulkan-loader pkgs.stdenv.cc.cc.lib ]} $out/bin/zigcraft
            wrapProgram $out/bin/zigcraft \
              --prefix LD_LIBRARY_PATH : ${pkgs.lib.makeLibraryPath [ pkgs.stdenv.cc.cc.lib pkgs.vulkan-loader ]}
          '';
        };

        devShells.default = pkgs.mkShell {
          nativeBuildInputs = [
            zig
            pkgs.zls
            pkgs.pkg-config
            pkgs.glslang
            pkgs.weston
          ];

          buildInputs = [
            pkgs.sdl3
            pkgs.vulkan-loader
            pkgs.vulkan-headers
            pkgs.vulkan-validation-layers
            pkgs.mesa.drivers
          ];

          shellHook = ''
            echo "Zig 0.14 + SDL3 Dev Environment"
            echo "Compiler: $(zig version)"
          '';
        };
      });
}