annotate contrib/debugcmdserver.py @ 34938:aa05b95949fe stable

tests: adjust hooks for Windows

I'm not sure why these weren't working on Windows.  The failures were generally
in the style of:

  -  remote: phase-move: cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b:  1 -> 0
  +  remote: "phase-move: $HG_NODE:  $HG_OLDPHASE -> $HG_PHASE"

and

  -  abort: pretxnclose-bookmark.force-forward hook exited with status 1
  -  [255]
  +  abort: pretxnclose-bookmark.force-public hook exited with status 255
  +  [255]

These failures originated in ee5f0d047b41::f6d17075608f.

#!/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()