new_contents: ##############################################################################
  # Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://github.com/llnl/spack
  # Please also see the NOTICE and LICENSE files for our notice and the LGPL.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU Lesser General Public License (as
  # published by the Free Software Foundation) version 2.1, February 1999.
  #
  # This program is distributed in the hope that it will be useful, but
  # WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
  # conditions of the GNU Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  ##############################################################################
  from spack import *
  
  
  class PyPybind11(CMakePackage):
      """pybind11 -- Seamless operability between C++11 and Python.
      pybind11 is a lightweight header-only library that exposes C++ types in
      Python and vice versa, mainly to create Python bindings of existing C++
      code. Its goals and syntax are similar to the excellent Boost.Python
      library by David Abrahams: to minimize boilerplate code in traditional
      extension modules by inferring type information using compile-time
      introspection."""
  
      homepage = "https://pybind11.readthedocs.io"
      url      = "https://github.com/pybind/pybind11/archive/v2.1.0.tar.gz"
  
      version('2.1.1', '5518988698df937ccee53fb6ba91d12a')
      version('2.1.0', '3cf07043d677d200720c928569635e12')
  
      depends_on('py-pytest', type=('build'))
  
      extends('python')
  
      def cmake_args(self):
          args = []
          args.append('-DPYTHON_EXECUTABLE:FILEPATH=%s'
                      % self.spec['python'].command.path)
          return args
  
subject: Add package py-pybind11 (#5096)