nixpkgs/pkgs/tools/misc/fend/default.nix

{ lib
, stdenv
, fetchFromGitHub
, rustPlatform
, darwin
}:

rustPlatform.buildRustPackage rec {
  pname = "fend";
  version = "1.0.5";

  src = fetchFromGitHub {
    owner = "printfn";
    repo = pname;
    rev = "v${version}";
    sha256 = "sha256-y5r9/e3KbEojRIoGG9gBkVbxGrJJJhwVZiiTkpy4NtE=";
  };

  cargoSha256 = "sha256-iv3Uo3XUAxf+CmiRBm8EzQ2GhglPVqbN/LSofTa6ujw=";

  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];

  doInstallCheck = true;

  installCheckPhase = ''
    [[ "$($out/bin/fend "1 km to m")" = "1000 m" ]]
  '';

  meta = with lib; {
    description = "Arbitrary-precision unit-aware calculator";
    homepage = "https://github.com/printfn/fend";
    license = licenses.mit;
    maintainers = with maintainers; [ djanatyn ];
  };
}