view contrib/showstack.py @ 52128:0c260e7158e0

typing: suppress bogus pytype errors in `mercurial/wireprotoframing.py`

This fixes:

    File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 480, in createalternatelocationresponseframe:
        unsupported operand type(s) for item assignment: bytes [unsupported-operands]
      No attribute '__setitem__' on bytes
    File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 510, in createcommanderrorresponse:
        unsupported operand type(s) for item assignment: bytes [unsupported-operands]
      No attribute '__setitem__' on bytes
    File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 776, in __init__:
        Can't find module 'mercurial.zstd'. [import-error]
    File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 804, in __init__:
        Can't find module 'mercurial.zstd'. [import-error]
    File "/mnt/c/Users/Matt/hg/mercurial/wireprotoframing.py", line 834, in populatestreamencoders:
        Can't find module 'mercurial.zstd'. [import-error]

Using `TypedDict` is tempting here to fix the first two, but requires str keys.
The code doing the importing doesn't call the code at the other three locations
if the `mercurial.zstd` module fails to import in a place that handles the
ImportError.

# 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)
"""

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