chore: tidy nix expressions

nix/root-crate.nix

@@ -0,0 +1,23 @@
+{
+  crate2nix,
+  rustc,
+  cargo,
+  pkgs,
+  ...
+}: let
+  buildRustCrateForPkgs = _:
+    pkgs.buildRustCrate.override {
+      inherit cargo rustc;
+    };
+
+  # Cargo.nix for IFD
+  generatedCargoNix = crate2nix.tools.${pkgs.hostPlatform.system}.generatedCargoNix {
+    name = "rustnix";
+    src = ../.;
+  };
+
+  cargoNix = import generatedCargoNix {
+    inherit pkgs buildRustCrateForPkgs;
+  };
+in
+  cargoNix.rootCrate

nix/wasm-bindgen.nix

@@ -0,0 +1,19 @@
+{
+  fetchCrate,
+  buildWasmBindgenCli,
+  rustPlatform,
+  ...
+}:
+buildWasmBindgenCli rec {
+  src = fetchCrate {
+    pname = "wasm-bindgen-cli";
+    version = "0.2.127";
+    hash = "sha256-di+qBAdd7pENLiIB9CoZoab+W5xeDoByMREcCGTSzWo=";
+  };
+
+  cargoDeps = rustPlatform.fetchCargoVendor {
+    inherit src;
+    inherit (src) pname version;
+    hash = "sha256-FTv2GZIAQs0ePdIZXIXil7JbZ6kIT05VG6vqC1qNFxQ=";
+  };
+}

nix/with-toolchain.nix

@@ -0,0 +1,16 @@
+{
+  makeRustPlatform,
+  cargo,
+  rustc,
+  pkgs,
+  ...
+}: let
+  p = pkgs;
+in rec {
+  rustPlatform = makeRustPlatform {
+    inherit cargo rustc;
+  };
+  pkgs = p.extend (_: _: {
+    inherit rustPlatform;
+  });
+}

nix/wordle-solver-wasm-pkg.nix

@@ -0,0 +1,39 @@
+{
+  stdenvNoCC,
+  wasm-bindgen,
+  wordle-solver-wasm,
+  root-crate,
+  ...
+}: let
+  snake_name = "wordle_solver";
+  package-meta = {
+    name = "wordle-solver";
+    type = "module";
+    description = "module";
+    version = root-crate.build.crateVersion;
+    files = [
+      "${snake_name}_bg.wasm"
+      "${snake_name}.js"
+      "${snake_name}_bg.js"
+      "${snake_name}.d.ts"
+    ];
+    main = "${snake_name}.js";
+    types = "${snake_name}.d.ts";
+    sideEffects = [
+      "./${snake_name}.js"
+      "./snippets/*"
+    ];
+  };
+  package-json = builtins.toJSON package-meta;
+in
+  stdenvNoCC.mkDerivation {
+    name = "wordle-solver-wasm-pkg";
+    nativeBuildInputs = [wasm-bindgen];
+    unpackPhase = "true";
+    buildPhase = ''
+      wasm-bindgen --target bundler --out-dir $out ${wordle-solver-wasm}/lib/wordle_solver.wasm
+      cat <<EOF > $out/package.json
+      ${package-json}
+      EOF
+    '';
+  }

nix/wordle-solver-wasm.nix

@@ -0,0 +1,39 @@
+{
+  rustPlatform,
+  buildPackages,
+  lld,
+  name ? "wordle-solver",
+  ...
+}:
+rustPlatform.buildRustPackage {
+  inherit name;
+
+  src = ../.; # Or your source location
+  cargoLock.lockFile = ../Cargo.lock;
+
+  # Disable tests since they can't run on WASM
+  doCheck = false;
+
+  # Required dependencies for WASM builds
+  depsBuildBuild = [
+    buildPackages.stdenv.cc
+    lld # Needed for wasm-ld
+  ];
+
+  cargoBuildFlags = [
+    "--lib"
+    "--features"
+    "wasm-bindgen"
+  ];
+
+  # Configure rustc for WASM
+  env = {
+    RUSTFLAGS = ''--cfg=web_sys_unstable_apis -C linker=wasm-ld'';
+  };
+
+  # Copy the WASM file to the output
+  installPhase = ''
+    mkdir -p $out/lib
+    cp target/wasm32-unknown-unknown/release/*.wasm $out/lib/
+  '';
+}