Stub out day 17 in C#

Author: fwcd

README.md

@@ -22,6 +22,7 @@ My solutions to the [Advent of Code 2024](https://adventofcode.com/2024), writte
 - [x] [**Day 14**](day14): [Haskell](day14/src/Day14.hs)
 - [x] [**Day 15**](day15): [C++](day15/src/day15.cpp)
 - [x] [**Day 16**](day16): [Kotlin](day16/src/day16.kts)
+- [ ] [**Day 17**](day17): [C#](day17/src/day17.cs)
 
 ## Development
 

day17/derivation.nix

@@ -0,0 +1,51 @@
+{ stdenv, dotnet-runtime, dotnet-sdk }:
+  stdenv.mkDerivation {
+    name = "advent-of-code-2024-day17";
+    src = ./src;
+
+    nativeBuildInputs = [
+      dotnet-sdk
+    ];
+
+    buildInputs = [
+      dotnet-runtime
+    ];
+
+    # https://stackoverflow.com/questions/46065777/is-it-possible-to-compile-a-single-c-sharp-code-file-with-the-net-core-roslyn-c
+
+    buildPhase = ''
+      sdk="$(echo "${dotnet-sdk.outPath}"/sdk/*)"
+      shared="$(echo "${dotnet-runtime.outPath}"/shared/Microsoft.NETCore.App/*)"
+      dotnet "$sdk/Roslyn/bincore/csc.dll" \
+        -r:"$shared/System.Private.CoreLib.dll" \
+        -r:"$shared/System.Runtime.dll" \
+        -r:"$shared/System.Collections.dll" \
+        -r:"$shared/System.Console.dll" \
+        -r:"$shared/System.IO.dll" \
+        -r:"$shared/System.Linq.dll" \
+        day17.cs
+    '';
+
+    installPhase = ''
+      mkdir -p $out/{bin,lib}
+      cp day17.exe $out/lib
+
+      cat <<EOF > $out/lib/day17.runtimeconfig.json
+      {
+        "runtimeOptions": {
+          "framework": {
+            "name": "Microsoft.NETCore.App",
+            "version": "$(ls ${dotnet-runtime.outPath}/shared/Microsoft.NETCore.App)"
+          }
+        }
+      }
+      EOF
+
+      cat <<EOF > $out/bin/day17
+      #!/bin/bash
+      exec "${dotnet-runtime.outPath}/bin/dotnet" "\$(dirname "\$0")/../lib/day17.exe" "\$@"
+      EOF
+
+      chmod +x $out/bin/day17
+    '';
+  }

day17/flake.lock

@@ -0,0 +1,28 @@
+{
+  description = "Advent of Code 2024 - Day 17 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/day17";
+        };
+      });
+    };
+}

day17/flake.nix

@@ -0,0 +1 @@
+123

day17/resources/demo.txt

@@ -0,0 +1,15 @@
+using System;
+using System.IO;
+
+if (args.Length == 0)
+{
+  Console.WriteLine("usage: day17 <path to input>");
+  return 1;
+}
+
+string input = File.ReadAllText(args[0]);
+// TODO
+
+Console.WriteLine($"Input: {input}");
+
+return 0;

day17/resources/input.txt

@@ -126,5 +126,12 @@
     },
     "path": "day16/src/day16.kts",
     "completed": true
+  },
+  {
+    "lang": {
+      "codemirror": "csharp",
+      "name": "C#"
+    },
+    "path": "day17/src/day17.cs"
   }
 ]