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#!/usr/bin/env python3
#
# Copyright 2014 Hewlett-Packard Development Company, L.P.
#
# 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.
# This is an output filter to filter and timestamp the logs from Grenade and
# DevStack. Largely our awk filters got beyond the complexity level which were
# sustainable, so this provides us much more control in a single place.
#
# The overhead of running python should be less than execing `date` a million
# times during a run.
import argparse
import datetime
import re
import sys
IGNORE_LINES = re.compile(r'(set \+o|xtrace)')
def get_options():
parser = argparse.ArgumentParser(
description='Filter output by DevStack and friends')
parser.add_argument('-o', '--outfile',
help='Output file for content',
default=None)
parser.add_argument('-v', '--verbose', action='store_true',
help='Write to stdout',
default=False)
parser.add_argument('-b', '--no-timestamp', action='store_true',
help='Do not prefix stdout with timestamp (bare)',
default=False)
return parser.parse_args()
def skip_line(line):
"""Should we skip this line."""
return IGNORE_LINES.search(line) is not None
def main():
opts = get_options()
outfile = None
if opts.outfile:
outfile = open(opts.outfile, 'ab', 0)
# Otherwise fileinput reprocess args as files
sys.argv = []
for line in iter(sys.stdin.readline, ''):
# put skip lines here
if skip_line(line):
continue
now = datetime.datetime.utcnow()
ts_line = ("%s | %s" % (
now.strftime("%Y-%m-%d %H:%M:%S.%f")[:-3],
line))
if opts.verbose:
sys.stdout.write(line if opts.no_timestamp else ts_line)
sys.stdout.flush()
if outfile:
# We've opened outfile as a binary file to get the
# non-buffered behaviour. on python3, sys.stdin was
# opened with the system encoding and made the line into
# utf-8, so write the logfile out in utf-8 bytes.
outfile.write(ts_line.encode('utf-8', errors='surrogateescape'))
outfile.flush()
if __name__ == '__main__':
try:
sys.exit(main())
except KeyboardInterrupt:
sys.exit(1)
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