text: ##############################################################################
  # Copyright (c) 2013-2017, 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/spack/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 *
  import os
  
  
  class XplorNih(Package):
      """XPLOR-NIH is a structure determination program.
  
         Note: A manual download is required for XPLOR-NIH.
         Spack will search your current directory for the download file.
         Alternatively, add this file to a mirror so that Spack can find it.
         For instructions on how to set up a mirror, see
         http://spack.readthedocs.io/en/latest/mirrors.html"""
  
      homepage = "https://nmr.cit.nih.gov/xplor-nih/"
  
      version('2.45', 'ab3e046604beb0effc89a1adb7bab438')
  
      depends_on('python', type=('build', 'run'))
  
      def url_for_version(self, version):
          return "file://{0}/xplor-nih-{1}-Linux_x86_64.tar.gz".format(os.getcwd(), version)
  
      def install(self, spec, prefix):
          install_tree(self.stage.source_path, prefix.bin)
  