old_contents: # -*- coding: utf-8 -*-
  """Exceptions for libvcs.
  
  libvcs.exc
  ~~~~~~~~~~
  
  """
  from __future__ import absolute_import, print_function, unicode_literals
  
  
  class LibVCSException(Exception):
      """Standard exception raised by libvcs."""
  
      pass
  
  
  class CommandError(LibVCSException):
      """This exception is raised on non-zero return codes."""
  
      def __init__(self, output, returncode=None, cmd=None):
          self.returncode = returncode
          self.output = output
          if cmd:
              if isinstance(cmd, list):
                  cmd = ' '.join(cmd)
              self.cmd = cmd
  
      def __str__(self):
          message = self.message.format(returncode=self.returncode, cmd=self.cmd)
          if len(self.output.strip()):
              message += '\n%s' % self.output
          return message
  
      message = 'Command failed with code {returncode}: {cmd}'
  
  
  class CommandTimeoutError(CommandError):
      """CommandError which gets raised when a subprocess exceeds its timeout."""
  
      pass
  
  
  class InvalidPipURL(LibVCSException):
      """Invalid pip-style URL."""
  
      def __init__(self, url):
          self.url = url
          super(InvalidPipURL, self).__init__()
  
      def __str__(self):
          return self.message
  
      message = (
          'Repo URL %s requires a vcs scheme. Prepend the vcs (hg+, git+, svn+)'
          'to the repo URL. e.g: git+https://github.com/freebsd/freebsd.git'
      )
  
  
  class InvalidVCS(LibVCSException):
      """Invalid VCS."""
  
      pass
  
new_contents: # -*- coding: utf-8 -*-
  """Exceptions for libvcs.
  
  If you see this, we're publishing to S3 automatically
  
  """
  from __future__ import absolute_import, print_function, unicode_literals
  
  
  class LibVCSException(Exception):
      """Standard exception raised by libvcs."""
  
      pass
  
  
  class CommandError(LibVCSException):
      """This exception is raised on non-zero return codes."""
  
      def __init__(self, output, returncode=None, cmd=None):
          self.returncode = returncode
          self.output = output
          if cmd:
              if isinstance(cmd, list):
                  cmd = ' '.join(cmd)
              self.cmd = cmd
  
      def __str__(self):
          message = self.message.format(returncode=self.returncode, cmd=self.cmd)
          if len(self.output.strip()):
              message += '\n%s' % self.output
          return message
  
      message = 'Command failed with code {returncode}: {cmd}'
  
  
  class CommandTimeoutError(CommandError):
      """CommandError which gets raised when a subprocess exceeds its timeout."""
  
      pass
  
  
  class InvalidPipURL(LibVCSException):
      """Invalid pip-style URL."""
  
      def __init__(self, url):
          self.url = url
          super(InvalidPipURL, self).__init__()
  
      def __str__(self):
          return self.message
  
      message = (
          'Repo URL %s requires a vcs scheme. Prepend the vcs (hg+, git+, svn+)'
          'to the repo URL. e.g: git+https://github.com/freebsd/freebsd.git'
      )
  
  
  class InvalidVCS(LibVCSException):
      """Invalid VCS."""
  
      pass
  
subject: Add example to see if we're pushing/invalidating automatically