Setup

2022/.gitignore

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+dist-newstyle/

2022/CHANGELOG.md

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+# Revision history for x2022
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

2022/aoc2022.cabal

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+cabal-version:      2.4
+name:               aoc2022
+version:            0.1.0.0
+
+-- A short (one-line) description of the package.
+-- synopsis:
+
+-- A longer description of the package.
+-- description:
+
+-- A URL where users can report bugs.
+-- bug-reports:
+
+-- The license under which the package is released.
+-- license:
+author:             Steph
+maintainer:         noreply+steph@code.steph.tools
+
+-- A copyright notice.
+-- copyright:
+-- category:
+extra-source-files: CHANGELOG.md
+
+executable aoc2022
+    main-is:          Main.hs
+
+    -- Modules included in this executable, other than Main.
+    -- other-modules:
+
+    -- LANGUAGE extensions used by modules in this package.
+    -- other-extensions:
+    build-depends:    base ^>=4.16.3.0
+    hs-source-dirs:   app
+    default-language: Haskell2010

2022/app/Main.hs

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+module Main where
+
+main :: IO ()
+main = putStrLn "Hello, Haskell!"

2022/shell.nix

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+{
+  pkgs ? import <nixpkgs> {},
+  hc ? "ghc924"
+}:
+
+pkgs.stdenv.mkDerivation rec {
+  name = "aoc-2022";
+  buildInputs = [
+    pkgs.haskell.compiler.${hc}
+    pkgs.git
+    pkgs.zlib
+    pkgs.cabal-install
+    pkgs.pkgconfig
+    pkgs.which
+  ];
+  shellHook = ''
+    export LD_LIBRARY_PATH=${pkgs.lib.makeLibraryPath buildInputs}:$LD_LIBRARY_PATH
+    export LANG=en_US.UTF-8
+  '';
+  LOCALE_ARCHIVE =
+    if pkgs.stdenv.isLinux
+    then "${pkgs.glibcLocales}/lib/locale/locale-archive"
+    else "";
+}
+