third_party/WebKit/Tools/Scripts/webkit-patch

#!/usr/bin/env vpython
# Copyright (c) 2011 Code Aurora Forum. All rights reserved.
# Copyright (c) 2010 Google Inc. All rights reserved.
# Copyright (c) 2009 Apple Inc. All rights reserved.
# Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
#
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import codecs
import logging
import os
import signal
import sys

import webkitpy.common.version_check

from webkitpy.common.system.log_utils import configure_logging
from webkitpy.tool.webkit_patch import WebKitPatch

# A StreamWriter will by default try to encode all objects passed
# to write(), so when passed a raw string already encoded as utf8,
# it will blow up with an UnicodeDecodeError. This does not match
# the default behaviour of writing to sys.stdout, so we intercept
# the case of writing raw strings and make sure StreamWriter gets
# input that it can handle.


class ForgivingUTF8Writer(codecs.lookup('utf-8')[-1]):

    def write(self, obj):
        if isinstance(obj, str):
            # Assume raw strings are utf-8 encoded. If this line
            # fails with an UnicodeDecodeError, our assumption was
            # wrong, and the stacktrace should show you where we
            # write non-Unicode/UTF-8 data (which we shouldn't).
            obj = obj.decode('utf-8')
        return codecs.StreamWriter.write(self, obj)

# By default, sys.stdout assumes ascii encoding.  Since our messages can
# contain unicode strings (as with some peoples' names) we need to apply
# the utf-8 codec to prevent throwing and exception.
# Not having this was the cause of https://bugs.webkit.org/show_bug.cgi?id=63452.
sys.stdout = ForgivingUTF8Writer(sys.stdout)


def main():
    # This is a hack to let us enable DEBUG logging as early as possible.
    # Note this can't be ternary as versioning.check_version()
    # hasn't run yet and this python might be older than 2.5.
    if set(["-v", "--verbose"]).intersection(set(sys.argv)):
        logging_level = logging.DEBUG
    else:
        logging_level = logging.INFO
    configure_logging(logging_level=logging_level)
    WebKitPatch(os.path.abspath(__file__)).main()


if __name__ == "__main__":
    try:
        main()
    except KeyboardInterrupt:
        sys.exit(signal.SIGINT + 128)