homepage/flake.nix

{
  description = "Angestöpselt Homepage";

  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";

  outputs = { self, nixpkgs }: let
    system = "x86_64-linux";

    pkgs = import nixpkgs { inherit system; };

    nodejs = pkgs.nodejs-16_x;

    nodePackages = import ./_nix/default.nix { inherit pkgs system nodejs; };
    nodeDependencies = nodePackages.nodeDependencies.override {
      nativeBuildInputs = with pkgs; [ pkg-config ];
      buildInputs = with pkgs; [ vips ];
      dontNpmInstall = true;
    };
  in {
    packages.${system} = {
      angestoepselt-site = pkgs.stdenv.mkDerivation {
        name = "angestoepselt-site";
        src = self;

        buildInputs = [ nodejs nodeDependencies ];

        buildPhase = ''
          npm run build
        '';

        installPhase = ''
          mkdir -p "$out"
          cp -r _site "$out/www"
        '';
      };

      # This package isn't actually the fully-built site, but rather a
      # derivation that contains the relevant programs (with correctly set up
      # environment) to develop and build the site. It can either be used with
      # `nix develop` – see the repository's readme for details – or compiled
      # with `nix build`. The latter will output a folder which contains node
      # and npm binaries that can be used in an IDE.
      angestoepselt-site-dev = pkgs.runCommand "angestoepselt-site-dev" {
        buildInputs = [ nodejs pkgs.makeWrapper ];

        shellHook = ''
          export NODE_PATH=${nodeDependencies}/lib/node_modules
          export PATH="${nodeDependencies}/bin:$PATH"

          echo ""
          echo "  To start editing content, run:"
          echo ""
          echo "npm run build:styles"
          echo "npm run dev:site"
          echo ""
          echo "  The site will be available under http://localhost:8080/ for"
          echo "  local development and rebuilds automatically when content"
          echo "  changes."
          echo ""
        '';
      } ''
        mkdir -p "$out"

        wrap() {
          makeWrapper "${nodejs}/bin/$1" "$out/bin/$1" \
            --prefix PATH : "${nodejs}/bin" \
            --prefix PATH : "${nodeDependencies}/bin" \
            --set-default NODE_PATH "${nodeDependencies}/lib/node_modules"
        }

        wrap node
        wrap npm
        wrap npx

        unset -f wrap
      '';
    };

    defaultPackage.${system} = self.packages.${system}.angestoepselt-site-dev;
  };
}