#!/usr/bin/env python3 # Copyright (c) 2017-2019 The Bitcoin Core developers # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. """Combine logs from multiple bitcoin nodes as well as the test_framework log. This streams the combined log output to stdout. Use combine_logs.py > outputfile to write to an outputfile. If no argument is provided, the most recent test directory will be used.""" import argparse from collections import defaultdict, namedtuple import heapq import itertools import os import pathlib import re import sys import tempfile # N.B.: don't import any local modules here - this script must remain executable # without the parent module installed. # Should match same symbol in `test_framework.test_framework`. TMPDIR_PREFIX = "litecoin_func_test_" # Matches on the date format at the start of the log event TIMESTAMP_PATTERN = re.compile(r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d{6})?Z") LogEvent = namedtuple('LogEvent', ['timestamp', 'source', 'event']) def main(): """Main function. Parses args, reads the log files and renders them as text or html.""" parser = argparse.ArgumentParser( description=__doc__, formatter_class=argparse.RawTextHelpFormatter) parser.add_argument( 'testdir', nargs='?', default='', help=('temporary test directory to combine logs from. ' 'Defaults to the most recent')) parser.add_argument('-c', '--color', dest='color', action='store_true', help='outputs the combined log with events colored by source (requires posix terminal colors. Use less -r for viewing)') parser.add_argument('--html', dest='html', action='store_true', help='outputs the combined log as html. Requires jinja2. pip install jinja2') args = parser.parse_args() if args.html and args.color: print("Only one out of --color or --html should be specified") sys.exit(1) testdir = args.testdir or find_latest_test_dir() if not testdir: print("No test directories found") sys.exit(1) if not args.testdir: print("Opening latest test directory: {}".format(testdir), file=sys.stderr) colors = defaultdict(lambda: '') if args.color: colors["test"] = "\033[0;36m" # CYAN colors["node0"] = "\033[0;34m" # BLUE colors["node1"] = "\033[0;32m" # GREEN colors["node2"] = "\033[0;31m" # RED colors["node3"] = "\033[0;33m" # YELLOW colors["reset"] = "\033[0m" # Reset font color log_events = read_logs(testdir) if args.html: print_logs_html(log_events) else: print_logs_plain(log_events, colors) print_node_warnings(testdir, colors) def read_logs(tmp_dir): """Reads log files. Delegates to generator function get_log_events() to provide individual log events for each of the input log files.""" # Find out what the folder is called that holds the debug.log file glob = pathlib.Path(tmp_dir).glob('node0/**/debug.log') path = next(glob, None) if path: assert next(glob, None) is None # more than one debug.log, should never happen chain = re.search(r'node0/(.+?)/debug\.log$', path.as_posix()).group(1) # extract the chain name else: chain = 'regtest' # fallback to regtest (should only happen when none exists) files = [("test", "%s/test_framework.log" % tmp_dir)] for i in itertools.count(): logfile = "{}/node{}/{}/debug.log".format(tmp_dir, i, chain) if not os.path.isfile(logfile): break files.append(("node%d" % i, logfile)) return heapq.merge(*[get_log_events(source, f) for source, f in files]) def print_node_warnings(tmp_dir, colors): """Print nodes' errors and warnings""" warnings = [] for stream in ['stdout', 'stderr']: for i in itertools.count(): folder = "{}/node{}/{}".format(tmp_dir, i, stream) if not os.path.isdir(folder): break for (_, _, fns) in os.walk(folder): for fn in fns: warning = pathlib.Path('{}/{}'.format(folder, fn)).read_text().strip() if warning: warnings.append(("node{} {}".format(i, stream), warning)) print() for w in warnings: print("{} {} {} {}".format(colors[w[0].split()[0]], w[0], w[1], colors["reset"])) def find_latest_test_dir(): """Returns the latest tmpfile test directory prefix.""" tmpdir = tempfile.gettempdir() def join_tmp(basename): return os.path.join(tmpdir, basename) def is_valid_test_tmpdir(basename): fullpath = join_tmp(basename) return ( os.path.isdir(fullpath) and basename.startswith(TMPDIR_PREFIX) and os.access(fullpath, os.R_OK) ) testdir_paths = [ join_tmp(name) for name in os.listdir(tmpdir) if is_valid_test_tmpdir(name) ] return max(testdir_paths, key=os.path.getmtime) if testdir_paths else None def get_log_events(source, logfile): """Generator function that returns individual log events. Log events may be split over multiple lines. We use the timestamp regex match as the marker for a new log event.""" try: with open(logfile, 'r', encoding='utf-8') as infile: event = '' timestamp = '' for line in infile: # skip blank lines if line == '\n': continue # if this line has a timestamp, it's the start of a new log event. time_match = TIMESTAMP_PATTERN.match(line) if time_match: if event: yield LogEvent(timestamp=timestamp, source=source, event=event.rstrip()) timestamp = time_match.group() if time_match.group(1) is None: # timestamp does not have microseconds. Add zeroes. timestamp_micro = timestamp.replace("Z", ".000000Z") line = line.replace(timestamp, timestamp_micro) timestamp = timestamp_micro event = line # if it doesn't have a timestamp, it's a continuation line of the previous log. else: # Add the line. Prefix with space equivalent to the source + timestamp so log lines are aligned event += " " + line # Flush the final event yield LogEvent(timestamp=timestamp, source=source, event=event.rstrip()) except FileNotFoundError: print("File %s could not be opened. Continuing without it." % logfile, file=sys.stderr) def print_logs_plain(log_events, colors): """Renders the iterator of log events into text.""" for event in log_events: lines = event.event.splitlines() print("{0} {1: <5} {2} {3}".format(colors[event.source.rstrip()], event.source, lines[0], colors["reset"])) if len(lines) > 1: for line in lines[1:]: print("{0}{1}{2}".format(colors[event.source.rstrip()], line, colors["reset"])) def print_logs_html(log_events): """Renders the iterator of log events into html.""" try: import jinja2 except ImportError: print("jinja2 not found. Try `pip install jinja2`") sys.exit(1) print(jinja2.Environment(loader=jinja2.FileSystemLoader('./')) .get_template('combined_log_template.html') .render(title="Combined Logs from testcase", log_events=[event._asdict() for event in log_events])) if __name__ == '__main__': main()