{ lib
, stdenv
, buildPythonPackage
, fetchpatch
, fetchPypi
, flit-core
, click
, pytestCheckHook
, shellingham
, pytest-xdist
, pytest-sugar
, coverage
, pythonOlder
}:

buildPythonPackage rec {
  pname = "typer";
  version = "0.4.1";
  format = "pyproject";

  disabled = pythonOlder "3.6";

  src = fetchPypi {
    inherit pname version;
    sha256 = "sha256-Vkau8Nk2ssdhoQOT8DhO5rXH/guz5c1xCxcTTKHZnP8=";
  };

  nativeBuildInputs = [
    flit-core
  ];

  propagatedBuildInputs = [
    click
  ];

  checkInputs = [
    pytestCheckHook
    pytest-xdist
    pytest-sugar
    shellingham
    coverage # execs coverage in tests
  ];

  preCheck = ''
    export HOME=$(mktemp -d);
  '';
  disabledTests = lib.optionals stdenv.isDarwin [
    # likely related to https://github.com/sarugaku/shellingham/issues/35
    "test_show_completion"
    "test_install_completion"
  ];

  pythonImportsCheck = [ "typer" ];

  meta = with lib; {
    description = "Python library for building CLI applications";
    homepage = "https://typer.tiangolo.com/";
    license = licenses.mit;
    maintainers = with maintainers; [ winpat ];
  };
}