flake.nix

{
  description = "dev deps for elm";

  # to activate, type `nix develop` while in the repo dir or a subdir.
  # or use direnv to automatically do so (see .envrc)
  # for best results, don't have a global python installed.  mixing python
  # versions can make for venv problems.

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (
      system: let
        pname = "elm dev";
        pkgs = nixpkgs.legacyPackages."${system}";
      in
        rec {
          inherit pname;

          # `nix develop`
          devShell = pkgs.mkShell {
            nativeBuildInputs = with pkgs; [
              elm2nix
              elmPackages.elm
              elmPackages.elm-analyse
              elmPackages.elm-doc-preview
              elmPackages.elm-format
              elmPackages.elm-live
              elmPackages.elm-test
              elmPackages.elm-upgrade
              elmPackages.elm-xref
              elmPackages.elm-language-server
              elmPackages.elm-verify-examples
              elmPackages.elmi-to-json
              elmPackages.elm-optimize-level-2
            ];
          };
        }
    );
}