Remove the review bot app.

reviewbot/patching.py

-# Copyright (c) 2013 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Copyright 2008 Google Inc. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Utility for parsing patches, originally inspired by rietveld source."""
-
-import re
-
-
-_CHUNK_RE = re.compile(r"""
-  @@
-  \s+
-  -
-  (?: (\d+) (?: , (\d+) )?)
-  \s+
-  \+
-  (?: (\d+) (?: , (\d+) )?)
-  \s+
-  @@
-""", re.VERBOSE)
-
-
-class PatchParseError(Exception):
-  """Raised on parse errors."""
-  pass
-
-
-def ParsePatchToLines(lines):
-  """Parses a patch from an iterable type.
-
-  Args:
-    lines: The lines to parse.
-
-  Returns:
-    None on error, otherwise a list of 3-tuples:
-    (old_line_no, new_line_no, line)
-
-    A line number can be None if it doesn't exist in the old/new file.
-  """
-  # Helper function that matches a hunk header and returns line numbers.
-  def match_hunk_start(line):
-    match = _CHUNK_RE.match(line)
-    if not match:
-      raise PatchParseError(line)
-    return (int(match.groups()[0]), int(match.groups()[2]))
-
-  iterator = lines.__iter__()
-  try:
-    # Skip leading lines until after we've seen one starting with '+++'.
-    while not iterator.next().startswith('+++'):
-      pass
-
-    # Parse first hunk header.
-    old_ln, new_ln = match_hunk_start(iterator.next())
-  except StopIteration:
-    return []
-
-  # Process the actual patch lines.
-  result = []
-  for line in iterator:
-    if line[0] == '@':
-      old_ln, new_ln = match_hunk_start(line)
-    elif line[0] == '-':
-      result.append((old_ln, None, line[1:]))
-      old_ln += 1
-    elif line[0] == '+':
-      result.append((None, new_ln, line[1:]))
-      new_ln += 1
-    elif line[0] == ' ':
-      result.append((old_ln, new_ln, line[1:]))
-      old_ln += 1
-      new_ln += 1
-    else:
-      raise PatchParseError(line)
-
-  return result