bisect_list.py

#!/usr/bin/env python2
# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""A simple bisector to bisect a list of arbitrary strings.

The strings to bisect are read from stdin, one item at a line.

Example:
  Let's play the number guessing game. You choice a number in your mind
  in range 1..99. You can lie within 20% probability. Let bisect-kit
  guess.

  Assume numbers less than your answer are considered as "old" and greater or
  equals to your answer are "new".
    $ seq 1 99 | ./bisect-list.py init --old 1 --new 99 --noisy=old=1/5,new=4/5
    $ ./bisect-list.py config switch /bin/true
    $ ./bisect-list.py config eval ./eval-manually.sh
    $ ./bisect-list.py run

  If you don't lie, just omit --noisy argument.

  p.s. seq(1) prints a sequence of numbers, one at a line.
"""

from __future__ import print_function
import logging
import sys

from bisect_kit import cli
from bisect_kit import core

logger = logging.getLogger(__name__)


class ListDomain(core.BisectDomain):
  """Enumerate list of string for bisection."""
  revtype = staticmethod(cli.argtype_notempty)

  @staticmethod
  def add_init_arguments(parser):
    # Do nothing because no additional arguments required for this bisector.
    pass

  @staticmethod
  def init(opts):
    config = {}
    revlist = map(str.strip, sys.stdin.readlines())
    return config, revlist

  def __init__(self, config):
    self.config = config

  def setenv(self, env, rev):
    pass

  def view(self, old, new):
    logger.info('[%s] is old', old)
    logger.info('[%s] is new', new)


if __name__ == '__main__':
  cli.BisectorCommandLineInterface(ListDomain).main()