old_contents: ##############################################################################
  # Copyright (c) 2013, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://scalability-llnl.github.io/spack
  # Please also see the LICENSE file 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 General Public License (as published by
  # the Free Software Foundation) version 2.1 dated 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 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
  ##############################################################################
  import tty
  from urlparse import urlparse
  
  from spack.util.compression import allowed_archive
  
  ALLOWED_SCHEMES    = ["http", "https", "ftp"]
  
  def url(url_string):
      url = urlparse(url_string)
      if url.scheme not in ALLOWED_SCHEMES:
          tty.die("Invalid protocol in URL: '%s'" % url_string)
  
      if not allowed_archive(url_string):
          tty.die("Invalid file type in URL: '%s'" % url_string)
  
new_contents: ##############################################################################
  # Copyright (c) 2013, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://scalability-llnl.github.io/spack
  # Please also see the LICENSE file 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 General Public License (as published by
  # the Free Software Foundation) version 2.1 dated 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 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
  ##############################################################################
  import tty
  from urlparse import urlparse
  
  from spack.util.compression import allowed_archive
  
  ALLOWED_SCHEMES    = ["http", "https", "ftp", "file"]
  
  def url(url_string):
      url = urlparse(url_string)
      if url.scheme not in ALLOWED_SCHEMES:
          tty.die("Invalid protocol in URL: '%s'" % url_string)
  
      if not allowed_archive(url_string):
          tty.die("Invalid file type in URL: '%s'" % url_string)
  
subject: Allow file URLs