Stub out day 22 in Dart

Author: fwcd

README.md

@@ -27,6 +27,7 @@ My solutions to the [Advent of Code 2024](https://adventofcode.com/2024), writte
 - [x] [**Day 19**](day19): [PyGyat](day19/src/day19.gyat)
 - [x] [**Day 20**](day20): [Rust](day20/src/day20.rs)
 - [x] [**Day 21**](day21): [Scala](day21/src/day21.scala)
+- [ ] [**Day 22**](day22): [Dart](day22/src/day22.dart)
 
 ## Development
 

day22/derivation.nix

@@ -0,0 +1,26 @@
+{ stdenv, dart }:
+  stdenv.mkDerivation {
+    name = "advent-of-code-2024-day22";
+    src = ./src;
+
+    nativeBuildInputs = [
+      dart
+    ];
+
+    buildPhase = ''
+      mkdir -p {tmpbin,out}
+
+      # Ad-hoc signing is required on arm64 macOS, this fixes it (not sure why
+      # the dart derivation doesn't provide it)
+      ${if stdenv.isDarwin then ''
+        ln -s /usr/bin/codesign tmpbin/codesign
+      '' else ""}
+
+      PATH="./tmpbin:$PATH" dart compile exe day22.dart -o out/day22
+    '';
+
+    installPhase = ''
+      mkdir -p $out/bin
+      cp out/day22 $out/bin
+    '';
+  }

day22/flake.lock

@@ -0,0 +1,28 @@
+{
+  description = "Advent of Code 2024 - Day 22 solution";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    in {
+      packages = forAllSystems (system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+        in {
+          default = pkgs.callPackage ./derivation.nix {};
+        }
+      );
+
+      apps = forAllSystems (system: {
+        default = {
+          type = "app";
+          program = "${self.packages.${system}.default}/bin/day22";
+        };
+      });
+    };
+}

day22/flake.nix

@@ -0,0 +1 @@
+abc

day22/resources/demo.txt

@@ -0,0 +1 @@
+abc

day22/resources/input.txt

@@ -0,0 +1,6 @@
+import 'dart:io';
+
+Future<void> main(List<String> args) async {
+  final input = await File(args[0]).readAsString();
+  print("Input: $input");
+}

day22/src/day22.dart

@@ -167,5 +167,12 @@
     },
     "path": "day21/src/day21.scala",
     "completed": true
+  },
+  {
+    "lang": {
+      "codemirror": "dart",
+      "name": "Dart"
+    },
+    "path": "day22/src/day22.dart"
   }
 ]

paths.json

@@ -1,5 +1,4 @@
 Swift
-Dart
 Ruby
 Crystal
 Go