+
−#!/usr/bin/env python
+
−#
+
−# Dumps output generated by Mercurial's command server in a formatted style to a
+
−# given file or stderr if '-' is specified. Output is also written in its raw
+
−# format to stdout.
+
−#
+
−# $ ./hg serve --cmds pipe | ./contrib/debugcmdserver.py -
+
−# o, 52   -> 'capabilities: getencoding runcommand\nencoding: UTF-8'
+
−
+
−from __future__ import absolute_import, print_function
+
−import struct
+
−import sys
+
−
+
−if len(sys.argv) != 2:
+
−    print('usage: debugcmdserver.py FILE')
+
−    sys.exit(1)
+
−
+
−outputfmt = '>cI'
+
−outputfmtsize = struct.calcsize(outputfmt)
+
−
+
−if sys.argv[1] == '-':
+
−    log = sys.stderr
+
−else:
+
−    log = open(sys.argv[1], 'a')
+
−
+
−def read(size):
+
−    data = sys.stdin.read(size)
+
−    if not data:
+
−        raise EOFError
+
−    sys.stdout.write(data)
+
−    sys.stdout.flush()
+
−    return data
+
−
+
−try:
+
−    while True:
+
−        header = read(outputfmtsize)
+
−        channel, length = struct.unpack(outputfmt, header)
+
−        log.write('%s, %-4d' % (channel, length))
+
−        if channel in 'IL':
+
−            log.write(' -> waiting for input\n')
+
−        else:
+
−            data = read(length)
+
−            log.write(' -> %r\n' % data)
+
−        log.flush()
+
−except EOFError:
+
−    pass
+
−finally:
+
−    if log != sys.stderr:
+
−        log.close()