view contrib/showstack.py @ 33067:5a51db8bf41b

keyword: make wrapped repository and kwtemplater refer to each other

Wrapper functions of keyword extension are defined in reposetup(),
because they refer to kwtemplater instantiated in reposetup().

But these functions can be defined statically, if kwtemplater can be
obtained via repository at runtime.

This is a part of preparations for defining them statically.

To avoid cyclic reference, this patch makes kwtemplater use weakref to
refer related repository instance.

# 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