view contrib/casesmash.py @ 26123:bdac264e5ed4

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)
----

import os, __builtin__
from mercurial import util

def lowerwrap(scope, funcname):
    f = getattr(scope, funcname)
    def wrap(fname, *args, **kwargs):
        d, base = os.path.split(fname)
        try:
            files = os.listdir(d or '.')
        except OSError:
            files = []
        if base in files:
            return f(fname, *args, **kwargs)
        for fn in files:
            if fn.lower() == base.lower():
                return f(os.path.join(d, fn), *args, **kwargs)
        return f(fname, *args, **kwargs)
    scope.__dict__[funcname] = wrap

def normcase(path):
    return path.lower()

os.path.normcase = normcase

for f in 'file open'.split():
    lowerwrap(__builtin__, f)

for f in "chmod chown open lstat stat remove unlink".split():
    lowerwrap(os, f)

for f in "exists lexists".split():
    lowerwrap(os.path, f)

lowerwrap(util, 'posixfile')