flake.nix

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs";
    flake-parts.url = "github:hercules-ci/flake-parts";
    haskell-flake.url = "github:srid/haskell-flake";
    flake-compat = {
      url = "github:edolstra/flake-compat";
      flake = false;
    };
  };

  outputs = inputs@{ self, nixpkgs, flake-compat, flake-parts, haskell-flake, ... }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = [ "x86_64-linux" "aarch64-linux" ];
      imports = [ inputs.haskell-flake.flakeModule ];
      perSystem = { self', system, pkgs, ... }: {
        haskellProjects.default = {
          basePackages = pkgs.haskell.packages.ghc96;
          # To get access to non-Haskell dependencies one most add them to `extraBuildDepends`
          # and then use the haskell package `which` to locate the Filepath of the executable
          # that's being added. In this toy example we'll be using the non-Haskell dependency
          # `cowsay` findable in nixpkgs like so:
          #
          # telomare = {
          #   extraBuildDepends = [ pkgs.cowsay
          #                       ];
          # };
          #
          # An example of Haskell code using `cowsay` would be:
          # ```haskell
          # cowsayBin :: FilePath
          # cowsayBin = $(staticWhich "cowsay")

          # cowsay :: IO String
          # cowsay = do
          #   (_, mhout, _, _) <- createProcess (shell $ show cowsayBin <> " hola") { std_out = CreatePipe }
          #   case mhout of
          #     Just hout -> hGetContents hout
          #     Nothing -> pure "mhout failed"
          # ```
          # settings = {
          #   semaphore-compat = {
          #     check = false;
          #     jailbreak = true;
          #   };
          # };
          devShell = {
            enable = true;
            tools = hp: {
              inherit (hp) cabal-install haskell-language-server;
            };
          };
      };

      packages.default = self'.packages.telomare;

      apps.default = {
        type = "app";
        program = self.packages.${system}.telomare + "/bin/telomare";
      };
      apps.repl = {
        type = "app";
        program = self.packages.${system}.telomare + "/bin/telomare-repl";
      };
      apps.evaluare = {
        type = "app";
        program = self.packages.${system}.telomare + "/bin/telomare-evaluare";
      };
      apps.lsp = {
        type = "app";
        program = "${self.packages.${system}.telomare}/bin/telomare-lsp";
      };

      checks = self'.packages;
    };
  };
}