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 *
  
  
  class Parallel(AutotoolsPackage):
      """GNU parallel is a shell tool for executing jobs in parallel using
      one or more computers. A job can be a single command or a small
      script that has to be run for each of the lines in the input.
      """
  
      homepage = "http://www.gnu.org/software/parallel/"
      url      = "http://ftp.gnu.org/gnu/parallel/parallel-20170122.tar.bz2"
  
      version('20170322', '4fe1b8d2e3974d26c77f0b514988214d')
      version('20170122', 'c9f0ec01463dc75dbbf292fd8be5f1eb')
      version('20160422', '24621f684130472694333709bd4454cb')
      version('20160322', '4e81e0d36902ab4c4e969ee6f35e6e57')
  
      def check(self):
          # The Makefile has a 'test' target, but it does not work
          make('check')
  
      depends_on('perl', type=('build', 'run'))
  
      @run_before('install')
      def filter_sbang(self):
          """Run before install so that the standard Spack sbang install hook
             can fix up the path to the perl binary.
          """
          perl = self.spec['perl'].command
          kwargs = {'ignore_absent': False, 'backup': False, 'string': False}
  
          with working_dir('src'):
              match = '^#!/usr/bin/env perl|^#!/usr/bin/perl.*'
              substitute = "#!{perl}".format(perl=perl)
              files = ['parallel', 'niceload', 'parcat', 'sql', ]
              filter_file(match, substitute, *files, **kwargs)
  