wow-gear-finder/flake.nix

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-25.05";
    utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      self,
      nixpkgs,
      utils,
    }:
    utils.lib.eachDefaultSystem (
      system:
      let
        # The path to the npm project
        src = ./.;

        # Read the package-lock.json as a Nix attrset
        packageLock = builtins.fromJSON (builtins.readFile (src + "/package-lock.json"));

        # Create an array of all (meaningful) dependencies
        deps = builtins.attrValues (removeAttrs packageLock.packages [ "" ]);
        # ++ builtins.attrValues (removeAttrs packageLock.dependencies [ "" ]);

        # Turn each dependency into a fetchurl call
        tarballs = map (
          p:
          pkgs.fetchurl {
            url = p.resolved;
            hash = p.integrity;
          }
        ) deps;

        # Write a file with the list of tarballs
        tarballsFile = pkgs.writeTextFile {
          name = "tarballs";
          text = builtins.concatStringsSep "\n" tarballs;
        };
        pkgs = import nixpkgs { inherit system; };
      in
      {
        devShell =
          with pkgs;
          mkShell {
            buildInputs = [
              nodejs_22 # Even versions are more stable
              pocketbase
            ];
          };

        nodeModules = pkgs.stdenv.mkDerivation {
          name = "wow-gear-finder-node-modules";
          src = ./.;
          buildInputs = [ pkgs.nodejs ];
          buildPhase = ''
            export HOME=$PWD/.home
            export npm_config_cache=$PWD/.npm
            mkdir -p $out
            cd $out
            cp -r $src/package.json $src/package-lock.json .

            while read package
            do
              echo "caching $package"
              npm cache add "$package"
            done <${tarballsFile}

            npm ci
          '';
        };

        # Derivation for node_modules (npm ci)
        #   nodeModules = pkgs.stdenv.mkDerivation {
        #     name = "wow-gear-finder-node-modules";
        #     src = ./.;
        #     buildInputs = [ pkgs.nodejs_22 ];
        #     installPhase = ''
        #     mkdir -p $out
        #     cp package.json package-lock.json $out/
        #     cd $out
        #     npm ci --ignore-scripts
        #   '';
        #   # Only output node_modules
        #   dontBuild = true;
        #   dontConfigure = true;
        # };

        # Derivation for vite build
        viteBuild = pkgs.stdenv.mkDerivation {
          name = "wow-gear-finder-vite-build";
          src = ./.;
          buildInputs = [ pkgs.nodejs_22 ];
          # Use node_modules from previous derivation
          NODE_PATH = "${self.outputs.nodeModules}/node_modules";
          installPhase = ''
            cp -r $src $out/app
            cd $out/app
            cp ${self.outputs.nodeModules}/package.json .
            cp -r ${self.outputs.nodeModules}/node_modules .
            npm run build
            mkdir -p $out/dist
            cp -r dist/* $out/dist/
          '';
          dontBuild = true;
          dontConfigure = true;
        };

        dockerImage = pkgs.dockerTools.buildLayeredImage {
          name = "wow-gear-finder-app";
          tag = "latest";
          contents = [ pkgs.caddy ];
          config = {
            Cmd = [
              "/bin/caddy"
              "file-server"
              "--root"
              "/srv"
              "--listen"
              ":8080"
            ];
            ExposedPorts = {
              "8080/tcp" = { };
            };
            WorkingDir = "/srv";
          };
          extraCommands = ''
            mkdir -p $out/srv
            cp -r ${self.outputs.viteBuild}/dist/* $out/srv/
          '';
        };
      }
    );
}