landmines.py 文件源码

def clobber_if_necessary(new_landmines, src_dir):
  """Does the work of setting, planting, and triggering landmines."""
  out_dir = get_build_dir(src_dir)
  landmines_path = os.path.normpath(os.path.join(src_dir, '.landmines'))
  try:
    os.makedirs(out_dir)
  except OSError as e:
    if e.errno == errno.EEXIST:
      pass

  if os.path.exists(landmines_path):
    with open(landmines_path, 'r') as f:
      old_landmines = f.readlines()
    if old_landmines != new_landmines:
      old_date = time.ctime(os.stat(landmines_path).st_ctime)
      diff = difflib.unified_diff(old_landmines, new_landmines,
          fromfile='old_landmines', tofile='new_landmines',
          fromfiledate=old_date, tofiledate=time.ctime(), n=0)
      sys.stdout.write('Clobbering due to:\n')
      sys.stdout.writelines(diff)
      sys.stdout.flush()

      clobber.clobber(out_dir)

  # Save current set of landmines for next time.
  with open(landmines_path, 'w') as f:
    f.writelines(new_landmines)