default.nix

{ compiler ? "ghc8104", pkgs ? import <nixpkgs> {} }:

let
  getvolume = pkgs.callPackage ./getvolume/default.nix {};
  packageSet = pkgs.haskell.packages.${compiler};
  haskellPackages =
    packageSet.override {
      overrides = (
        self: super:
          {
            ghc = super.ghc // { withPackages = super.ghc.withHoogle; };
            ghcWithPackages = self.ghc.withPackages;
            async-timer = (pkgs.haskell.lib.doJailbreak (pkgs.haskell.lib.dontCheck super.async-timer));
          }
      );
    };
  raw = haskellPackages.callCabal2nix "barbq" ./. {};
  drv = pkgs.symlinkJoin {
    name = "barbq";
    paths = [ raw getvolume ];
  };

in
{
  barbq = drv;
  barbq-shell = haskellPackages.shellFor {
    packages = p: [ raw ];
    shellHook = ''
      export HIE_HOOGLE_DATABASE="$(cat $(which hoogle) | sed -n -e 's|.*--database \(.*\.hoo\).*|\1|p')"
    '';
    buildInputs = with pkgs; [ cabal-install hlint ghcid getvolume pkgs.libiconv ];
  };
}