flake.nix


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{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    crane.url = "github:ipetkov/crane";
    treefmt-nix = {
      url = "github:numtide/treefmt-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    fenix = {
      url = "github:nix-community/fenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
      crane,
      fenix,
      treefmt-nix,
      ...
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        lib = pkgs.lib;

        rustToolchain = fenix.packages.${system}.fromToolchainFile {
          file = ./rust-toolchain.toml;
          sha256 = "sha256-p8h3Sl/YRByZfZTAKXdsvF6xEenXKrXSVvpphmZENH4=" ;
        };

        craneLib = (crane.mkLib pkgs).overrideToolchain rustToolchain;
        src = (craneLib.cleanCargoSource ./.);

        commonArgs = {
          inherit src;
          strictDeps = true;
          cargoToml = ./Cargo.toml;
    
          nativeBuildInputs = [
            pkgs.pkg-config
          ];
        };

        cargoArtifacts = craneLib.buildDepsOnly commonArgs;

        simple-pow = craneLib.buildPackage (
          commonArgs
          // {
            inherit cargoArtifacts;
          }
        );

        tree-fmt-eval = treefmt-nix.lib.evalModule pkgs (
          { ... }:
          {
            # Used to find the project root
            projectRootFile = "flake.nix";
            programs.nixfmt.enable = true;
            programs.deadnix.enable = true;
            programs.rustfmt = {
              enable = true;
              package = rustToolchain;
            };
          }
        );

      in
      {
        checks = {
          inherit simple-pow;
          str-clippy = craneLib.cargoClippy (
            commonArgs
            // {
              inherit cargoArtifacts;
              cargoClippyExtraArgs = "--all-targets -- --deny warnings";
            }
          );
          formatting = tree-fmt-eval.config.build.check self;
        };

        formatter = tree-fmt-eval.config.build.wrapper;

        apps.default = flake-utils.lib.mkApp {
          drv = simple-pow;
        };

        devShells.default = craneLib.devShell {
          checks = self.checks.${system};

          packages = with pkgs; [
            cargo-watch
            python3
            wgsl-analyzer
          ];

          env = {
            "LD_LIBRARY_PATH" = lib.makeLibraryPath (with pkgs; [ stdenv.cc.cc.lib
   vulkan-loader
         libx11
          libxcursor
          libxi
          libxrandr
          libxkbcommon
            ]); 
          };
        };
      }
    );
}