Set up day 3 in Perl

Author: fwcd

README.md

@@ -8,6 +8,7 @@ My solutions to the [Advent of Code 2024](https://adventofcode.com/2024), writte
 
 - [x] [**Day 01**](day01): [PowerShell](day01/src/day01.ps1)
 - [x] [**Day 02**](day02): [Nix](day02/src/day02.nix)
+- [ ] [**Day 03**](day03): [Perl](day03/src/day03.pl)
 
 ## Development
 

day03/derivation.nix

@@ -0,0 +1,10 @@
+{ stdenv, perl }:
+  stdenv.mkDerivation {
+    name = "advent-of-code-2024-day03";
+    src = ./src;
+
+    installPhase = ''
+      mkdir -p $out/bin
+      cp day03.pl $out/bin/day03
+    '';
+  }

day03/flake.lock

@@ -0,0 +1,28 @@
+{
+  description = "Advent of Code 2024 - Day 03 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/day03";
+        };
+      });
+    };
+}

day03/flake.nix

@@ -0,0 +1 @@
+xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))

day03/resources/demo.txt

@@ -0,0 +1,3 @@
+#!/usr/bin/env perl
+
+print "Hello World\n";

day03/src/day03.pl

@@ -14,5 +14,12 @@
     },
     "path": "day02/src/day02.nix",
     "completed": true
+  },
+  {
+    "lang": {
+      "codemirror": "perl",
+      "name": "Perl"
+    },
+    "path": "day03/src/day03.pl"
   }
 ]