Get Scylla building with nix using elm2nix

https://github.com/cachix/elm2nix

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

elm-dependencies.nix

@@ -0,0 +1,77 @@
+{
+
+      "NoRedInk/elm-json-decode-pipeline" = {
+        sha256 = "0y25xn0yx1q2xlg1yx1i0hg4xq1yxx6yfa99g272z8162si75hnl";
+        version = "1.0.0";
+      };
+
+      "elm/browser" = {
+        sha256 = "1zlmx672glg7fdgkvh5jm47y85pv7pdfr5mkhg6x7ar6k000vyka";
+        version = "1.0.1";
+      };
+
+      "elm/core" = {
+        sha256 = "1l0qdbczw91kzz8sx5d5zwz9x662bspy7p21dsr3f2rigxiix2as";
+        version = "1.0.2";
+      };
+
+      "elm/file" = {
+        sha256 = "15vw1ilbg0msimq2k9magwigp8lwqrgvz3vk6qia6b3ldahvw8jr";
+        version = "1.0.1";
+      };
+
+      "elm/html" = {
+        sha256 = "1n3gpzmpqqdsldys4ipgyl1zacn0kbpc3g4v3hdpiyfjlgh8bf3k";
+        version = "1.0.0";
+      };
+
+      "elm/http" = {
+        sha256 = "008bs76mnp48b4dw8qwjj4fyvzbxvlrl4xpa2qh1gg2kfwyw56v1";
+        version = "2.0.0";
+      };
+
+      "elm/json" = {
+        sha256 = "1a107nmm905dih4w4mjjkkpdcjbgaf5qjvr7fl30kkpkckfjjnrw";
+        version = "1.1.2";
+      };
+
+      "elm/svg" = {
+        sha256 = "1cwcj73p61q45wqwgqvrvz3aypjyy3fw732xyxdyj6s256hwkn0k";
+        version = "1.0.1";
+      };
+
+      "elm/time" = {
+        sha256 = "0vch7i86vn0x8b850w1p69vplll1bnbkp8s383z7pinyg94cm2z1";
+        version = "1.0.0";
+      };
+
+      "elm/url" = {
+        sha256 = "0av8x5syid40sgpl5vd7pry2rq0q4pga28b4yykn9gd9v12rs3l4";
+        version = "1.0.0";
+      };
+
+      "hecrj/html-parser" = {
+        sha256 = "0pla6hswsl9piwrj3yl4pc4nfs5adc4g4c93644j4xila7bqqg8a";
+        version = "2.0.0";
+      };
+
+      "elm/bytes" = {
+        sha256 = "040d7irrawcbnq9jxhzx8p9qacdlw5bncy6lgndd6inm53rvvwbp";
+        version = "1.0.7";
+      };
+
+      "elm/parser" = {
+        sha256 = "0a3cxrvbm7mwg9ykynhp7vjid58zsw03r63qxipxp3z09qks7512";
+        version = "1.1.0";
+      };
+
+      "elm/virtual-dom" = {
+        sha256 = "0q1v5gi4g336bzz1lgwpn5b1639lrn63d8y6k6pimcyismp2i1yg";
+        version = "1.0.2";
+      };
+
+      "rtfeldman/elm-hex" = {
+        sha256 = "1y0aa16asvwdqmgbskh5iba6psp43lkcjjw9mgzj3gsrg33lp00d";
+        version = "1.0.0";
+      };
+}

elm.json

@@ -3,7 +3,7 @@
     "source-directories": [
         "src"
     ],
-    "elm-version": "0.19.0",
+    "elm-version": "0.19.1",
     "dependencies": {
         "direct": {
             "NoRedInk/elm-json-decode-pipeline": "1.0.0",
@@ -29,4 +29,4 @@
         "direct": {},
         "indirect": {}
     }
-}
+}

elm.nix

@@ -0,0 +1,56 @@
+{ lib, stdenv, elm, fetchElmDeps, uglify-js, sass }:
+
+let
+  mkDerivation =
+    { srcs ? ./elm-dependencies.nix
+    , src
+    , name
+    , srcdir ? "./src"
+    , targets ? []
+    , registryDat ? ./registry.dat
+    , outputJavaScript ? false
+    }:
+    stdenv.mkDerivation {
+      inherit name src;
+
+      buildInputs = [ elm sass ]
+        ++ lib.optional outputJavaScript uglify-js;
+
+      buildPhase = fetchElmDeps {
+        elmPackages = import srcs;
+        elmVersion = "0.19.1";
+        inherit registryDat;
+      };
+
+      installPhase = let
+        elmfile = module: "${srcdir}/${builtins.replaceStrings ["."] ["/"] module}.elm";
+        extension = if outputJavaScript then "js" else "html";
+      in ''
+        ${lib.concatStrings (map (module: ''
+          echo "compiling ${elmfile module}"
+          elm make ${elmfile module} --optimize --output $out/${module}.${extension}
+          ${lib.optionalString outputJavaScript ''
+            echo "minifying ${elmfile module}"
+            uglifyjs $out/${module}.${extension} --compress 'pure_funcs="F2,F3,F4,F5,F6,F7,F8,F9,A2,A3,A4,A5,A6,A7,A8,A9",pure_getters,keep_fargs=false,unsafe_comps,unsafe' \
+                | uglifyjs --mangle --output $out/${module}.min.${extension}
+          ''}
+        '') targets)}
+
+	# Custom logic for Scylla in particular
+	mkdir $out/static $out/static/js $out/static/css $out/static/svg
+	cp $src/index.html $out/index.html
+	cp $out/Main.min.js $out/static/js/elm.js
+	cp $src/static/js/*.js $out/static/js
+	cp $src/static/svg/*.svg $out/static/svg
+	sass $src/static/scss/style.scss $out/static/css/style.css
+      '';
+    };
+in mkDerivation {
+  name = "Scylla-0.1.0";
+  srcs = ./elm-dependencies.nix;
+  src = ./.;
+  targets = ["Main"];
+  srcdir = "./src";
+  outputJavaScript = true;
+}
+

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1766736597,
+        "narHash": "sha256-BASnpCLodmgiVn0M1MU2Pqyoz0aHwar/0qLkp7CjvSQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "f560ccec6b1116b22e6ed15f4c510997d99d5852",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,23 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+          Scylla = import ./elm.nix {
+            inherit (pkgs) lib stdenv sass;
+            inherit (pkgs.elmPackages) fetchElmDeps elm;
+            inherit (pkgs.nodePackages) uglify-js;
+          };
+        in
+          {
+            packages = { inherit Scylla; };
+            defaultPackage = Scylla;
+          }
+        );
+}
+

src/Main.elm

@@ -1,3 +1,4 @@
+module Main exposing (..)
 import Browser exposing (application, UrlRequest(..))
 import Browser.Navigation as Nav
 import Browser.Dom exposing (Viewport, setViewportOf)