blob: 5768ceb6edbdd047823720ba075e0344715bf8f6 [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,
# 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 errno
import logging
import os
import tempfile
from webkitpy.common.system.executive import ScriptError
_log = logging.getLogger(__name__)
class PrettyPatch(object):
# FIXME: PrettyPatch should not require checkout_root.
def __init__(self, executive, checkout_root, filesystem=None):
self._executive = executive
self._filesystem = filesystem
self._checkout_root = checkout_root
self._pretty_patch_path = os.path.join(self._checkout_root, "Websites", "bugs.webkit.org", "PrettyPatch")
self._prettify_path = os.path.join(self._pretty_patch_path, "prettify.rb")
self.pretty_patch_error_html = "Failed to run PrettyPatch, see error log."
self.ppatch_available = None
def pretty_diff_file(self, diff):
# Diffs can contain multiple text files of different encodings
# so we always deal with them as byte arrays, not unicode strings.
assert(isinstance(diff, str))
pretty_diff = self.pretty_diff(diff)
diff_file = tempfile.NamedTemporaryFile(suffix=".html")
diff_file.write(pretty_diff)
diff_file.flush()
return diff_file
def pretty_diff(self, diff):
# pretify.rb will hang forever if given no input.
# Avoid the hang by returning an empty string.
if not diff:
return ""
args = [
"ruby",
"-I",
self._pretty_patch_path,
self._prettify_path,
]
# PrettyPatch does not modify the encoding of the diff output
# so we can't expect it to be utf-8.
return self._executive.run_command(args, input=diff, decode_output=False)
def pretty_patch_available(self):
if self.ppatch_available is None:
self.ppatch_available = self.check_pretty_patch(logging=False)
return self.ppatch_available
def check_pretty_patch(self, logging=True):
"""Checks whether we can use the PrettyPatch ruby script."""
try:
_ = self._executive.run_command(['ruby', '--version'])
except OSError as e:
if e.errno in [errno.ENOENT, errno.EACCES, errno.ECHILD]:
if logging:
_log.warning("Ruby is not installed; can't generate pretty patches.")
_log.warning('')
return False
if not self._filesystem.exists(self._pretty_patch_path):
if logging:
_log.warning("Unable to find %s; can't generate pretty patches." % self._pretty_patch_path)
_log.warning('')
return False
return True
def pretty_patch_text(self, diff_path):
if self.ppatch_available is None:
self.ppatch_available = self.check_pretty_patch(logging=False)
if not self.ppatch_available:
return self.pretty_patch_error_html
command = ("ruby", "-I", self._filesystem.dirname(self._prettify_path),
self._prettify_path, diff_path)
try:
# Diffs are treated as binary (we pass decode_output=False) as they
# may contain multiple files of conflicting encodings.
return self._executive.run_command(command, decode_output=False)
except OSError as e:
# If the system is missing ruby log the error and stop trying.
self.ppatch_available = False
_log.error("Failed to run PrettyPatch (%s): %s" % (command, e))
return self.pretty_patch_error_html
except ScriptError as e:
# If ruby failed to run for some reason, log the command
# output and stop trying.
self.ppatch_available = False
_log.error("Failed to run PrettyPatch (%s):\n%s" % (command, e.message_with_output()))
return self.pretty_patch_error_html