view contrib/debugcmdserver.py @ 24764:4dcd55802237

histedit: allow histedit --continue when not on a descendant (BC)

Previously we would not allow --continue if the current working copy parent was
not a descendant of the commit produced by the previous histedit step. There's
nothing really blocking us from continuing the histedit in this situation, so
let's stop aborting in this case.

This is technically a BC change, but it is making things more forgiving so I
think it's ok.

In the future we will likely add an 'exec' action to histedit, which means the
user can do whatever they want during the middle of a histedit (like perhaps
calling 'hg update'), which means we'll need to support this case eventually
anyway.

#!/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'

import sys, struct

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()