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# Copyright (C) 2010 Google Inc. All rights reserved.
# Copyright (C) 2010 Chris Jerdonek (chris.jerdonek@gmail.com)
# Copyright (C) 2010 ProFUSION embedded systems
#
# 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.
import logging
from webkitpy.common.checkout.diff_parser import DiffParser
_log = logging.getLogger("webkitpy.style.patchreader")
class PatchReader(object):
"""Supports checking style in patches."""
def __init__(self, text_file_reader):
"""Create a PatchReader instance.
Args:
text_file_reader: A TextFileReader instance.
"""
self._text_file_reader = text_file_reader
def check(self, patch_string):
"""Check style in the given patch."""
patch_files = DiffParser(patch_string.splitlines()).files
# The diff variable is a DiffFile instance.
for path, diff in patch_files.iteritems():
line_numbers = set()
for line in diff.lines:
# When deleted line is not set, it means that
# the line is newly added (or modified).
if not line[0]:
line_numbers.add(line[1])
_log.debug('Found %s new or modified lines in: %s'
% (len(line_numbers), path))
# If line_numbers is empty, the file has no new or
# modified lines. In this case, we don't check the file
# because we'll never output errors for the file.
# This optimization also prevents the program from exiting
# due to a deleted file.
if line_numbers:
self._text_file_reader.process_file(file_path=path,
line_numbers=line_numbers)
else:
# We don't check the file which contains deleted lines only
# but would like to treat it as to be processed so that
# we count up number of such files.
self._text_file_reader.count_delete_only_file()
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