debugformat: add a 'debugformat' command
The command displays basic data about all format variants registered for repo
upgrades. This gives a quick way to peek into a repository format.
The 'fm.write()' calls are very independent because more data will be added in
later changeset. Having more separate call make the later patch clearer.
# 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