# This shell setup was originally inspired by sioodmy.
# Some further cool tricks, like using vendor_conf.d to avoid having
# to build fish myself, are taken from viperml's setup.
{pkgs, ...}: let
  inherit (pkgs) lib;
  inherit (lib.strings) concatStringsSep;
  inherit (lib.attrsets) mapAttrsToList;

  toml = pkgs.formats.toml {};
  starship-config = import ./starship.nix;
  aliases = import ./aliases.nix {inherit pkgs;};
  vendorConf = "share/fish/vendor_conf.d";

  fishinit = import ./fishinit.nix {
    inherit
      pkgs
      aliasesStr
      vendorConf
      ;
  };

  aliasesStr =
    mapAttrsToList (k: v: "alias ${k}=\"${v}\"") aliases
    |> concatStringsSep "\n";

  packages = import ./packages.nix pkgs;
in
  (pkgs.symlinkJoin {
    name = "fish";
    paths = [pkgs.fish] ++ packages;
    nativeBuildInputs = [pkgs.makeWrapper];
    postBuild = ''
      wrapProgram $out/bin/fish \
      --set STARSHIP_CONFIG "${toml.generate "starship.toml" starship-config}" \
      --prefix XDG_DATA_DIRS : "${
        lib.makeSearchPathOutput "out" "share" [
          fishinit
        ]
      }"
    '';
  })
  .overrideAttrs (_: {
    passthru = {
      shellPath = "/bin/fish";
    };
  })