view contrib/showstack.py @ 48193:c95f6c2d1f4e

packaging: update the certifi dependency

Not sure if this helps with recent certificate issues[1], but we might as well
keep this modern.

Note that certifi no longer claims py2 support, and there's a PR to add it back
in[2].  Py2 support was dropped in 2020.04.05.2 (which predates what's being
updated here).  None of the *.py files have changed since the 2020.6.20 release,
and I was able to call `certifi.where()` in both a virtualenv and with
`hg debugshell` from an MSI install with this version, so we shouldn't be any
worse off than before.

[1] https://foss.heptapod.net/mercurial/tortoisehg/thg/-/issues/5745
[2] https://github.com/certifi/python-certifi/pull/154

Differential Revision: https://phab.mercurial-scm.org/D11609

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

from __future__ import absolute_import, print_function
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 sigexit(*args):
    sigshow(*args)
    print('alarm!')
    sys.exit(1)


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