contrib/showstack.py
author Valentin Gatien-Baron <valentin.gatienbaron@gmail.com>
Mon, 07 Feb 2022 00:33:22 -0500
changeset 48737 a6efb9180764
parent 43076 2372284d9457
child 48875 6000f5b25c9b
permissions -rw-r--r--
sparse: rework debugsparse's interface hg debugsparse supports arguments like --include, similar to `hg tracked --addinclude` or `hg log --include`. But in `hg debugsparse`, the pattern is not an argument of the flag, instead the patterns are the anonymous command line arguments. Not only is this surprising, it makes it impossible to use --include and --exclude in the same invocation, or --reset --exclude. So I propose making debugsparse making --include, --exclude take an argument, and rejecting anonymous command line arguments, as well as allowing mixing several of these flags in one invocations. Differential Revision: https://phab.mercurial-scm.org/D12155

# 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