Stub out day 15 in C++

Author: fwcd

.github/workflows/run.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: ['ubuntu-latest', 'macos-latest']
-        day: ['01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12', '13', '14']
+        day: ['01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12', '13', '14', '15']
         exclude:
         # TODO: Investigate why building Zig on macOS fails
         # https://github.com/fwcd/advent-of-code-2024/actions/runs/12202208638/job/34042374507

README.md

@@ -20,6 +20,7 @@ My solutions to the [Advent of Code 2024](https://adventofcode.com/2024), writte
 - [x] [**Day 12**](day12): [Objective-C](day12/src/day12.m)
 - [x] [**Day 13**](day13): [Python](day13/src/day13.py)
 - [x] [**Day 14**](day14): [Haskell](day14/src/Day14.hs)
+- [ ] [**Day 15**](day15): [C++](day15/src/day15.cpp)
 
 ## Development
 

day15/derivation.nix

@@ -0,0 +1,15 @@
+{ stdenv }:
+  stdenv.mkDerivation {
+    name = "advent-of-code-2024-day15";
+    src = ./src;
+
+    buildPhase = ''
+      mkdir -p out
+      $CXX -o out/day15 day15.cpp
+    '';
+
+    installPhase = ''
+      mkdir -p $out/bin
+      cp out/day15 $out/bin
+    '';
+  }

day15/flake.lock

@@ -0,0 +1,28 @@
+{
+  description = "Advent of Code 2024 - Day 15 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/day15";
+        };
+      });
+    };
+}

day15/flake.nix

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+  std::cout << "Hello" << std::endl;
+  return 0;
+}

day15/resources/demo.txt

@@ -110,5 +110,12 @@
     },
     "path": "day14/src/Day14.hs",
     "completed": true
+  },
+  {
+    "lang": {
+      "codemirror": "clike",
+      "name": "C++"
+    },
+    "path": "day15/src/day15.cpp"
   }
 ]