view contrib/showstack.py @ 31177:a7cabac20b62

ui: fix opts labeling on ui.warn et al for Python 3

This is a step towards fixing extension load warnings on Python
3. Note that I suspect there are still some bugs in this area and that
things like color won't work, but the code at least executes and
prints text to the console correctly now.

# showstack.py - extension to dump a Python stack trace on signal
#
# binds to both SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)

from __future__ import absolute_import
import signal
import sys
import traceback

def sigshow(*args):
    sys.stderr.write("\n")
    traceback.print_stack(args[1], limit=10, file=sys.stderr)
    sys.stderr.write("----\n")

def extsetup(ui):
    signal.signal(signal.SIGQUIT, sigshow)
    try:
        signal.signal(signal.SIGINFO, sigshow)
    except AttributeError:
        pass