old_contents: #!/usr/bin/env python
  
  """Distutils build/install script for the git_remote_helpers package."""
  
  from distutils.core import setup
  
  setup(
      name = 'git_remote_helpers',
      version = '0.1.0',
      description = 'Git remote helper program for non-git repositories',
      license = 'GPLv2',
      author = 'The Git Community',
      author_email = 'git@vger.kernel.org',
      url = 'http://www.git-scm.com/',
      package_dir = {'git_remote_helpers': ''},
      packages = ['git_remote_helpers', 'git_remote_helpers.git'],
  )
  
new_contents: #!/usr/bin/env python
  
  """Distutils build/install script for the git_remote_helpers package."""
  
  from distutils.core import setup
  
  # If building under Python3 we need to run 2to3 on the code, do this by
  # trying to import distutils' 2to3 builder, which is only available in
  # Python3.
  try:
      from distutils.command.build_py import build_py_2to3 as build_py
  except ImportError:
      # 2.x
      from distutils.command.build_py import build_py
  
  setup(
      name = 'git_remote_helpers',
      version = '0.1.0',
      description = 'Git remote helper program for non-git repositories',
      license = 'GPLv2',
      author = 'The Git Community',
      author_email = 'git@vger.kernel.org',
      url = 'http://www.git-scm.com/',
      package_dir = {'git_remote_helpers': ''},
      packages = ['git_remote_helpers', 'git_remote_helpers.git'],
      cmdclass = {'build_py': build_py},
  )
  
subject: use 2to3 if building with Python 3