view contrib/showstack.py @ 39636:399ddd3227a4

wireprotov2: add TODOs around extending changesetdata fields

Extensions will inevitably want to extend the set of changeset
data/fields that can be requested. We'll need to implement support
for extending this in the future. Add some TODOs to track that.

Differential Revision: https://phab.mercurial-scm.org/D4487

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