{ stdenv
, buildPythonPackage
, fetchPypi
, python
, wrapPython
, unzip
, callPackage
, bootstrapped-pip
}:

buildPythonPackage rec {
  pname = "setuptools";
  version = "41.2.0";
  format = "other";

  src = fetchPypi {
    inherit pname version;
    extension = "zip";
    sha256 = "66b86bbae7cc7ac2e867f52dc08a6bd064d938bac59dfec71b9b565dd36d6012";
  };

  # There is nothing to build
  dontBuild = true;

  nativeBuildInputs = [ bootstrapped-pip ];

  installPhase = ''
      dst=$out/${python.sitePackages}
      mkdir -p $dst
      export PYTHONPATH="$dst:$PYTHONPATH"
      ${python.pythonForBuild.interpreter} setup.py install --prefix=$out
      wrapPythonPrograms
  '';

  # Adds setuptools to nativeBuildInputs causing infinite recursion.
  catchConflicts = false;

  # Requires pytest, causing infinite recursion.
  doCheck = false;

  meta = with stdenv.lib; {
    description = "Utilities to facilitate the installation of Python packages";
    homepage = https://pypi.python.org/pypi/setuptools;
    license = with licenses; [ psfl zpl20 ];
    platforms = python.meta.platforms;
    priority = 10;
  };
}

{ stdenv
, buildPythonPackage
, fetchPypi
, python
, wrapPython
, unzip
, callPackage
, bootstrapped-pip
, lib
, pipInstallHook
, setuptoolsBuildHook
}:

buildPythonPackage rec {
  pname = "setuptools";
  version = "41.2.0";
  # Because of bootstrapping we don't use the setuptoolsBuildHook that comes with format="setuptools" directly.
  # Instead, we override it to remove setuptools to avoid a circular dependency.
  # The same is done for pip and the pipInstallHook.
  format = "other";

  src = fetchPypi {
    inherit pname version;
    extension = "zip";
    sha256 = "66b86bbae7cc7ac2e867f52dc08a6bd064d938bac59dfec71b9b565dd36d6012";
  };

  nativeBuildInputs = [
    bootstrapped-pip
    (pipInstallHook.override{pip=null;})
    (setuptoolsBuildHook.override{setuptools=null; wheel=null;})
  ];

  preBuild = lib.strings.optionalString (!stdenv.hostPlatform.isWindows) ''
    export SETUPTOOLS_INSTALL_WINDOWS_SPECIFIC_FILES=0
  '';

  pipInstallFlags = [ "--ignore-installed" ];

  # Adds setuptools to nativeBuildInputs causing infinite recursion.
  catchConflicts = false;

  # Requires pytest, causing infinite recursion.
  doCheck = false;

  meta = with stdenv.lib; {
    description = "Utilities to facilitate the installation of Python packages";
    homepage = https://pypi.python.org/pypi/setuptools;
    license = with licenses; [ psfl zpl20 ];
    platforms = python.meta.platforms;
    priority = 10;
  };
}

Remove windows files and make reproducible
pythonPackages.setuptools: Remove windows files and make reproducible

- setuptools includes *.exe files by default, but can be excluded with an ENV variable.
- setuptools was built as an egg, which had reproducibility problems. Instead use a wheel

These are various *.exe and *.xml files used only on windows. setuptools
includes them by default since it normally creates a single release for
all operating systems.

This reduces the size from 1020.0K to 801.6K according to `nix-path -sh`.

The egg is a zip file. setuptools leaves timestamps in the egg,
which makes the build unreproducible. Unfortunately the files aren't
compressed so the size of setuptools increases to 2.3M from 0.8M
according to `nix path-info -sh`.

With this change, setuptools is reproducible according to

    nix-build -A python37Packages.setuptools --check
