contrib: add showstack extension
This allows getting a Python stack trace at any time on Unix by
hitting Ctrl-\ (or Ctrl-T on BSDs). Useful for debugging mysterious
hangs on the fly. Sample output:
$ hg log -k nosuchmessage
^\
File "/home/mpm/hg/mercurial/revset.py", line 3089, in _iterfilter
if cond(x):
File "/home/mpm/hg/mercurial/util.py", line 415, in f
cache[arg] = func(arg)
File "/home/mpm/hg/mercurial/revset.py", line 1215, in matches
for t in c.files() + [c.user(), c.description()])
File "/home/mpm/hg/mercurial/context.py", line 525, in files
return self._changeset[3]
File "/home/mpm/hg/mercurial/util.py", line 531, in __get__
result = self.func(obj)
File "/home/mpm/hg/mercurial/context.py", line 498, in _changeset
return self._repo.changelog.read(self.rev())
File "/home/mpm/hg/mercurial/changelog.py", line 338, in read
text = self.revision(node)
File "/home/mpm/hg/mercurial/revlog.py", line 1092, in revision
bins = self._chunks(chain)
File "/home/mpm/hg/mercurial/revlog.py", line 1013, in _chunks
ladd(decompress(buffer(data, chunkstart - offset, chunklength)))
File "/home/mpm/hg/mercurial/revlog.py", line 91, in decompress
return _decompress(bin)
----
syntax: glob
*.elc
*.tmp
*.orig
*.rej
*~
*.mergebackup
*.o
*.so
*.dll
*.exe
*.pyd
*.pyc
*.pyo
*$py.class
*.swp
*.prof
*.zip
\#*\#
.\#*
tests/.coverage*
tests/annotated
tests/*.err
tests/htmlcov
build
contrib/hgsh/hgsh
contrib/vagrant/.vagrant
dist
packages
doc/common.txt
doc/*.[0-9]
doc/*.[0-9].txt
doc/*.[0-9].gendoc.txt
doc/*.[0-9].{x,ht}ml
MANIFEST
MANIFEST.in
patches
mercurial/__version__.py
mercurial/hgpythonlib.h
mercurial.egg-info
.DS_Store
tags
cscope.*
.idea/*
i18n/hg.pot
locale/*/LC_MESSAGES/hg.mo
hgext/__index__.py
# files installed with a local --pure build
mercurial/base85.py
mercurial/bdiff.py
mercurial/diffhelpers.py
mercurial/mpatch.py
mercurial/osutil.py
mercurial/parsers.py
syntax: regexp
^\.pc/
^\.(pydev)?project
# hackable windows distribution additions
^hg-python
^hg.py$