flake.nix


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{
  outputs = {
    self,
    nixpkgs,
  }: let
    pkgs = nixpkgs.legacyPackages.x86_64-linux;
    buildRustPackage =
      pkgs.rustPlatform.buildRustPackage.override
      {rustc = pkgs.rustc-wasm32;};
    rust-lld = pkgs.symlinkJoin {
      name = "rust-lld";
      paths = [pkgs.rustc-wasm32.llvmPackages.lld];
      postBuild = ''
        ln -s $out/bin/lld $out/bin/rust-lld
      '';
    };
  in {
    packages.x86_64-linux.default = buildRustPackage rec {
      name = "gems";
      src = ./.;
      cargoLock = {
        lockFile = ./Cargo.lock;
      };
      doCheck = false;
      buildPhase = ''
        cargo build --target wasm32-unknown-unknown --release
        wasm-bindgen --out-name gems \
        --out-dir $out \
        --target web target/wasm32-unknown-unknown/release/gems.wasm
      '';
      installPhase = ''
        cp -r assets $out
        cp index.html $out
      '';
      nativeBuildInputs = [
        rust-lld
        pkgs.wasm-bindgen-cli
      ];
    };
  };
}