website/flake.nix

{
  description = "Bevy WASM website";

  inputs = {
    flake-parts.url = "github:hercules-ci/flake-parts";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    inputs@{
      flake-parts,
      nixpkgs,
      rust-overlay,
      ...
    }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];

      perSystem =
        { pkgs, system, ... }:
        let
          overlays = [ (import rust-overlay) ];
          rustPkgs = import nixpkgs {
            inherit system overlays;
          };
          rustToolchain = rustPkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;

          cargoLock = fromTOML (builtins.readFile ./Cargo.lock);
          wasmBindgen = pkgs.lib.findFirst (
            pkg: pkg.name == "wasm-bindgen"
          ) (throw "Could not find wasm-bindgen package") cargoLock.package;

          wasm-bindgen-cli = pkgs.buildWasmBindgenCli rec {
            src = pkgs.fetchCrate {
              pname = "wasm-bindgen-cli";
              version = wasmBindgen.version;
              hash = "sha256-pcecKQd7E8Opw6bkFoE569epUi7gh5qpQF1e5PJY6V8=";
            };

            cargoDeps = pkgs.rustPlatform.fetchCargoVendor {
              inherit src;
              inherit (src) pname version;
              hash = "sha256-vmUrWVU7kPJJxO5qIVeAkwQyWDELO1Z4Z5gitz2kco8=";
            };
          };
        in
        {
          devShells.default = pkgs.mkShell {
            buildInputs = [
              rustToolchain
              wasm-bindgen-cli
              pkgs.binaryen
              pkgs.brotli
              pkgs.just
              pkgs.watchexec
            ];
          };
        };
    };
}