advent-of-code/flake.nix at main · bcc32/advent-of-code · GitHub

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{
  description = "Advent of Code solutions";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    ocaml-overlays.url = "github:nix-ocaml/nix-overlays";
    ocaml-overlays.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs =
    {
      self,
      flake-utils,
      nixpkgs,
      ocaml-overlays,
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ ocaml-overlays.overlays.default ];
        };
      in
      with pkgs;
      rec {
        devShells.default = mkShell {
          inputsFrom = [
            devShells.ocaml
            devShells.ruby
          ];
          buildInputs = [ graphviz ];
        };

        devShells.ocaml = mkShell {
          inputsFrom = [ packages.default ];
          buildInputs = lib.optional stdenv.isLinux inotify-tools ++ [
            ocamlPackages.merlin
            ocamlformat
            ocamlPackages.ocp-indent
            ocamlPackages.utop
          ];
        };

        devShells.ruby =
          let
            gems = bundlerEnv {
              name = "env";
              gemdir = ./.;
            };
          in
          mkShell {
            buildInputs = [
              gems
              gems.wrappedRuby
              bundix
            ];
          };

        packages.default = ocamlPackages.buildDunePackage rec {
          pname = "aoc";
          version = "0.1.0";
          useDune2 = true;
          src = ./.;
          buildInputs = with ocamlPackages; [
            angstrom
            async
            bignum
            cmdliner
            core
            core_bench
            delimited_parsing
            expect_test_helpers_async
            re
            topological_sort
            yojson
            z3
          ];
          nativeBuildInputs = lib.optionals (!stdenv.isDarwin) [ z3 ];
          # TODO: ocamlPackages.z3 build is currently broken on Darwin
          meta = {
            homepage = "https://github.com/bcc32/advent-of-code";
          };
        };
      }
    );
}