{ lib
, buildPythonPackage
, fetchFromGitHub
, isPy27
, pythonAtLeast
, poetry-core

# propagates
, pylev
, pastel

# python36+
, crashtest

# python2
, typing
, enum34

# tests
, pytest-mock
, pytestCheckHook
}:

buildPythonPackage rec {
  pname = "clikit";
  version = "0.6.2";
  format = "pyproject";

  src = fetchFromGitHub {
    owner = "sdispater";
    repo = pname;
    rev = "refs/tags/${version}";
    hash = "sha256-xAsUNhVQBjtSFHyjjnicAKRC3+Tdn3AdGDUYhmOOIdA=";
  };

  postPatch = ''
    substituteInPlace pyproject.toml --replace \
      'crashtest = { version = "^0.3.0", python = "^3.6" }' \
      'crashtest = { version = "*", python = "^3.6" }'
  '';

  nativeBuildInputs = [
    poetry-core
  ];

  propagatedBuildInputs = [
    pylev
    pastel
  ]
  ++ lib.optionals (pythonAtLeast "3.6") [ crashtest ]
  ++ lib.optionals isPy27 [ typing enum34 ];

  nativeCheckInputs = [
    pytest-mock
    pytestCheckHook
  ];

  pythonImportsCheck = [
    "clikit"
  ];

  meta = with lib; {
    homepage = "https://github.com/sdispater/clikit";
    description = "A group of utilities to build beautiful and testable command line interfaces";
    license = licenses.mit;
    maintainers = with maintainers; [ jakewaksbaum ];
  };
}