games/flake.nix

{
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    naersk.url = "github:nix-community/naersk";
    rust-overlay.url = "github:oxalica/rust-overlay";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    wild.url = "github:davidlattimore/wild";
  };

  outputs = { self, flake-utils, naersk, nixpkgs, rust-overlay, wild }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        systems = ["x86_64-linux"];
        overlays = [
          (import rust-overlay)
          wild.overlays.default
        ];
        wildStdenv = pkgs.useWildLinker pkgs.stdenv;
        pkgs = (import nixpkgs) {
          inherit system overlays;
          config.allowUnfree = true;
        };
        naersk' = pkgs.callPackage naersk { };
        buildInputs = with pkgs; [
          vulkan-loader
          xorg.libXcursor
          xorg.libXi
          xorg.libXrandr
          libxkbcommon
          wayland
          alsa-lib
          udev
          pkg-config
          clang
          lld
          mold
          binaryen
        ];
        nativeBuildInputs = with pkgs; [
          libxkbcommon
          (rust-bin.selectLatestNightlyWith (toolchain: toolchain.default.override {
            extensions = [ "rust-src" "clippy" "rustc-codegen-cranelift-preview" ];
            targets = [ "x86_64-unknown-linux-gnu" "wasm32-unknown-unknown" ];
          }))
        ];
        all_deps = with pkgs; [
          # cargo-expand
          nixpkgs-fmt
          cmake
          wasm-pack
          wasm-bindgen-cli
          trunk
          simple-http-server
          zip
          unzip
          mdcat
          rust-analyzer
        ] ++ buildInputs ++ nativeBuildInputs;
      in
      rec {
        # For `nix build` & `nix run`:
        defaultPackage = packages.bevy_template { stdenv = wildStdenv; };
        packages = rec {
          bevy_template = naersk'.buildPackage {
            src = ./.;
            nativeBuildInputs = nativeBuildInputs;
            buildInputs = buildInputs;
            postInstall = ''
              cp -r assets $out/bin/
            '';
            # Disables dynamic linking when building with Nix
            cargoBuildOptions = x: x ++ [ "--no-default-features" ];
          };
        };

        # For `nix develop`:
        devShell = pkgs.mkShell.override { stdenv = wildStdenv; } {
          nativeBuildInputs = all_deps;
          shellHook = ''
            export CARGO_MANIFEST_DIR=$(pwd)
            export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pkgs.lib.makeLibraryPath all_deps}"
          '';
        };
      }
    );
}