bevy-playground/flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    git-hooks.url = "github:cachix/git-hooks.nix";
    git-hooks.inputs.nixpkgs.follows = "nixpkgs";
  };
  outputs = {
    self,
    git-hooks,
    nixpkgs,
  }: let
    inherit (self) outputs;
    inherit (outputs) overlays;

    systems = ["aarch64-linux" "aarch64-darwin" "x86_64-darwin" "x86_64-linux"];
    forSystems = nixpkgs.lib.genAttrs systems;
    pkgsFor = system: (import nixpkgs {inherit system;}).extend overlays.default;
    genPkgs = func: (forSystems (system: func (pkgsFor system)));
    buildTimeDeps = pkgs:
      with pkgs; [
        pkg-config
        clang
        mold
        wayland
        clang
      ];
    linkTimeDeps = pkgs:
      with pkgs; [
        mold
        wayland
        clang
        udev
        alsa-lib
        vulkan-loader
        libxkbcommon
        xorg.libX11
        xorg.libXcursor
        xorg.libXi
        xorg.libXrandr
      ];
  in {
    checks = genPkgs (pkgs: {
      git-hooks = git-hooks.lib.${pkgs.system}.run {
        src = ./.;
        hooks = {
          alejandra.enable = true;
          # NOTE: These do not work well with `nix flake check` due to pure environments
          # https://github.com/cachix/git-hooks.nix/issues/452
          # cargo-check.enable = true;
          # clippy = {
          #   enable = true;
          #   packageOverrides.cargo = pkgs.cargo;
          #   packageOverrides.clippy = pkgs.rustPackages.clippy;
          # };
          rustfmt = {
            enable = true;
            packageOverrides.rustfmt = pkgs.rustfmt;
          };
        };
      };
      build = outputs.packages.${pkgs.system}.default;
    });

    packages = genPkgs (pkgs: {
      kodotag = pkgs.rustPlatform.buildRustPackage {
        pname = "kodotag";
        version = "0.1.0";
        nativeBuildInputs = buildTimeDeps pkgs;
        buildInputs = linkTimeDeps pkgs;
        src = ./.;
        hash = pkgs.lib.fakeHash;
        # cargoHash = pkgs.lib.fakeHash;
        cargoHash = "sha256-pXyMRYFpG9hr0itt5izAF+HDAL6m7ktHAnV7sPSwzp4=";

        # a hack to avoid using mold as our linker when building with nix
        postUnpack = ''
          ls -la
          rm -r ./*/.cargo
        '';
      };

      default = outputs.packages.${pkgs.system}.kodotag;
    });

    devShells = genPkgs (pkgs: {
      default = pkgs.mkShell {
        inherit (self.checks.${pkgs.system}.git-hooks) shellHook;
        inputsFrom = [outputs.packages.${pkgs.system}.default];
        packages = with pkgs; [
          rustPackages.clippy
          rust-analyzer
          rustfmt
        ];
        LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath (linkTimeDeps pkgs);
      };
    });

    overlays = {
      default = final: prev: {};
    };

    formatter = genPkgs (p: p.alejandra);
  };
}