text: # Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
  # Spack Project Developers. See the top-level COPYRIGHT file for details.
  #
  # SPDX-License-Identifier: (Apache-2.0 OR MIT)
  
  from spack import *
  
  
  class GitUrlTopLevel(Package):
      """Mock package that top-level git and url attributes.
  
      This demonstrates how Spack infers fetch mechanisms from parameters
      to the ``version`` directive.
  
      """
      homepage = "http://www.git-fetch-example.com"
  
      git = 'https://example.com/some/git/repo'
      url = 'https://example.com/some/tarball-1.0.tar.gz'
  
      # These resolve to git fetchers
      version('develop', branch='develop')
      version('submodules', submodules=True)
      version('3.4', commit='abc34')
      version('3.3', branch='releases/v3.3', commit='abc33')
      version('3.2', branch='releases/v3.2')
      version('3.1', tag='v3.1', commit='abc31')
      version('3.0', tag='v3.0')
  
      # These resolve to URL fetchers
      version('2.3', 'abc23', url='https://www.example.com/foo2.3.tar.gz')
      version('2.2', sha256='abc22', url='https://www.example.com/foo2.2.tar.gz')
      version('2.1', sha256='abc21')
      version('2.0', 'abc20')
  
      # These result in a FetcherConflict b/c we can't tell what to use
      version('1.3', sha256='abc13', commit='abc13')
      version('1.2', sha512='abc12', branch='releases/v1.2')
      version('1.1', md5='abc11', tag='v1.1')
      version('1.0', 'abc11', tag='abc123')
  
      def install(self, spec, prefix):
          pass
  