{ lib, fetchFromGitHub, python3
, extraComponents ? []
, extraPackages ? ps: []
, skipPip ? true }:

let

  py = python3.override {
    packageOverrides = self: super: {
      yarl = super.yarl.overridePythonAttrs (oldAttrs: rec {
        version = "1.1.0";
        src = oldAttrs.src.override {
          inherit version;
          sha256 = "162630v7f98l27h11msk9416lqwm2mpgxh4s636594nlbfs9by3a";
        };
      });
      aiohttp = super.aiohttp.overridePythonAttrs (oldAttrs: rec {
        version = "2.3.10";
        src = oldAttrs.src.override {
          inherit version;
          sha256 = "8adda6583ba438a4c70693374e10b60168663ffa6564c5c75d3c7a9055290964";
        };
      });
      pytest = super.pytest.overridePythonAttrs (oldAttrs: rec {
        version = "3.3.1";
        src = oldAttrs.src.override {
          inherit version;
          sha256 = "14zbnbn53yvrpv79ch6n02myq9b4winjkaykzi356sfqb7f3d16g";
        };
      });
      voluptuous = super.voluptuous.overridePythonAttrs (oldAttrs: rec {
        version = "0.10.5";
        src = oldAttrs.src.override {
          inherit version;
          sha256 = "15i3gaap8ilhpbah1ffc6q415wkvliqxilc6s69a4rinvkw6cx3s";
        };
      });
      hass-frontend = super.callPackage ./frontend.nix { };
    };
  };

  componentPackages = import ./component-packages.nix;

  availableComponents = builtins.attrNames componentPackages.components;

  getPackages = component: builtins.getAttr component componentPackages.components;

  componentBuildInputs = map (component: getPackages component py.pkgs) extraComponents;

  # Ensure that we are using a consistent package set
  extraBuildInputs = extraPackages py.pkgs;

  # Don't forget to run parse-requirements.py after updating
  hassVersion = "0.63.3";

in with py.pkgs; buildPythonApplication rec {
  pname = "homeassistant";
  version = assert (componentPackages.version == hassVersion); hassVersion;

  inherit availableComponents;

  # PyPI tarball is missing tests/ directory
  src = fetchFromGitHub {
    owner = "home-assistant";
    repo = "home-assistant";
    rev = version;
    sha256 = "1lrdrn0x8i81vbqxziv5fgcc8ldz7x5r62kfz3nyg4g43rk3dqq8";
  };

  propagatedBuildInputs = [
    # From setup.py
    requests pyyaml pytz pip jinja2 voluptuous typing aiohttp yarl async-timeout chardet astral certifi attrs
    # From http, frontend and recorder components
    sqlalchemy aiohttp-cors hass-frontend user-agents
  ] ++ componentBuildInputs ++ extraBuildInputs;

  checkInputs = [
    pytest requests-mock pydispatcher pytest-aiohttp
  ];

  checkPhase = ''
    # The components' dependencies are not included, so they cannot be tested
    py.test --ignore tests/components
    # Some basic components should be tested however
    py.test \
      tests/components/{group,http} \
      tests/components/test_{api,configurator,demo,discovery,frontend,init,introduction,logger,script,shell_command,system_log,websocket_api}.py
  '';

  makeWrapperArgs = lib.optional skipPip "--add-flags --skip-pip";

  meta = with lib; {
    homepage = https://home-assistant.io/;
    description = "Open-source home automation platform running on Python 3";
    license = licenses.asl20;
    maintainers = with maintainers; [ f-breidenstein dotlambda ];
  };
}