contrib/showstack.py

hgweb: parameterize the tag name of elements holding followlines selection

While plugging followlines.js into "annotate" view, we'll need to walk a
different DOM structure from that of "filerevision" view. In particular, the
selectable source line element is a <tr> in annotate view (in contrast with a
<span> in filerevision view). So make this tag name a parameter of
followlines.js script by passing its value as a "selectabletag" data attribute
of <pre class="sourcelines"> element.

As <pre class="sourcelines"> tags are getting quite long in templates, rewrite
them on several lines.

# 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