blob: fe3b782d511c1f2ae7fe89261baadd6449e39834 [file] [log] [blame]
# Copyright (C) 2010 Google Inc. All rights reserved.
#
# 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,
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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import logging
import sys
import re
import tempfile
from webkitpy.tool.steps.abstractstep import AbstractStep
from webkitpy.common.system.executive import Executive, ScriptError
from webkitpy.common.checkout import diff_parser
from webkitpy.common.unicode_compatibility import StringIO
from webkitpy.tool.steps import confirmdiff
_log = logging.getLogger(__name__)
class HasLanded(confirmdiff.ConfirmDiff):
@classmethod
def convert_to_svn(cls, diff):
lines = StringIO(diff).readlines()
convert = diff_parser.get_diff_converter(lines)
return "".join(convert(x) for x in lines)
@classmethod
def strip_change_log(cls, diff):
output = []
skipping = False
for line in StringIO(diff).readlines():
indexline = re.match("^Index: ([^\\n]*/)?([^/\\n]*)$", line)
if skipping and indexline:
skipping = False
if indexline and indexline.group(2) == "ChangeLog":
skipping = True
if not skipping:
output.append(line)
return "".join(output)
@classmethod
def diff_diff(cls, diff1, diff2, diff1_suffix, diff2_suffix, executive=None):
# Now this is where it gets complicated, we need to compare our diff to the diff at landed_revision.
diff1_patch = tempfile.NamedTemporaryFile(suffix=diff1_suffix + '.patch')
diff1_patch.write(diff1)
diff1_patch.flush()
# Check if there are any differences in the patch that don't happen
diff2_patch = tempfile.NamedTemporaryFile(suffix=diff2_suffix + '.patch')
diff2_patch.write(diff2)
diff2_patch.flush()
# Diff the two diff's together...
if not executive:
executive = Executive()
try:
return executive.run_command(
["interdiff", diff1_patch.name, diff2_patch.name], decode_output=False)
except ScriptError as e:
_log.warning("Unable to find interdiff util (part of GNU difftools package) which is required.")
raise
def run(self, state):
# Check if there are changes first
if not self._tool.scm().local_changes_exist():
_log.warn("No local changes found, exiting.")
return True
# Check if there is a SVN revision in the bug from the commit queue
landed_revision = self.cached_lookup(state, "bug").commit_revision()
if not landed_revision:
raise ScriptError("Unable to find landed message in associated bug.")
# Now this is there it gets complicated, we need to compare our diff to the diff at landed_revision.
landed_diff_bin = self._tool.scm().diff_for_revision(landed_revision)
landed_diff_trimmed = self.strip_change_log(self.convert_to_svn(landed_diff_bin))
# Check if there are any differences in the patch that don't happen
local_diff_bin = self._tool.scm().create_patch()
local_diff_trimmed = self.strip_change_log(self.convert_to_svn(local_diff_bin))
# Diff the two diff's together...
diff_diff = self.diff_diff(landed_diff_trimmed, local_diff_trimmed,
'-landed', '-local',
executive=self._tool.executive)
with self._show_pretty_diff(diff_diff) as pretty_diff_file:
if not pretty_diff_file:
self._tool.user.page(diff_diff)
if self._tool.user.confirm("May I discard local changes?"):
# Discard changes if the user confirmed we should
_log.warn("Discarding changes as requested.")
self._tool.scm().discard_local_changes()