code: def check_for_cygwin_mismatch():
      
      if sys.platform in ('cygwin', 'win32'):  # pragma: no cover (windows)
          is_cygwin_python = sys.platform == 'cygwin'
          toplevel = cmd_output('git', 'rev-parse', '--show-toplevel')[1]
          is_cygwin_git = toplevel.startswith('/')
  
          if is_cygwin_python ^ is_cygwin_git:
              exe_type = {True: '(cygwin)', False: '(windows)'}
              logger.warn(
                  'pre-commit has detected a mix of cygwin python / git\n'
                  'This combination is not supported, it is likely you will '
                  'receive an error later in the program.\n'
                  'Make sure to use cygwin git+python while using cygwin\n'
                  'These can be installed through the cygwin installer.\n'
                  ' - python {}\n'
                  ' - git {}\n'.format(
                      exe_type[is_cygwin_python], exe_type[is_cygwin_git],
                  ),
              )
docs: See https://github.com/pre-commit/pre-commit/issues/354