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#!/usr/bin/env python
# Protocol Buffers - Google's data interchange format
# Copyright 2008 Google Inc.  All rights reserved.
# https://developers.google.com/protocol-buffers/
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""Script to update a failure list file to add/remove failures.

This is sort of like comm(1), except it recognizes comments and ignores them.
"""

import argparse
import fileinput

parser = argparse.ArgumentParser(
    description='Adds/removes failures from the failure list.')
parser.add_argument('filename', type=str, help='failure list file to update')
parser.add_argument('--add', dest='add_list', action='append')
parser.add_argument('--remove', dest='remove_list', action='append')

args = parser.parse_args()

add_set = set()
remove_set = set()

for add_file in (args.add_list or []):
  with open(add_file) as f:
    for line in f:
      add_set.add(line)

for remove_file in (args.remove_list or []):
  with open(remove_file) as f:
    for line in f:
      if line in add_set:
        raise "Asked to both add and remove test: " + line
      remove_set.add(line.strip())

add_list = sorted(add_set, reverse=True)

existing_list = file(args.filename).read()

with open(args.filename, "w") as f:
  for line in existing_list.splitlines(True):
    test = line.split("#")[0].strip()
    while len(add_list) > 0 and test > add_list[-1]:
      f.write(add_list.pop())
    if test not in remove_set:
      f.write(line)