view contrib/debugshell.py @ 14345:bf9a105aed0a

win32.py: add argtypes and restype

This is a feature of ctypes. Without these, pypy complains with

  RuntimeWarning: C function without declared arguments called
  RuntimeWarning: C function without declared return type called

As a side effect of specifying restypes, the return value of e.g. CreateFileA
is now implicitly converted to an instance of _HANDLE, so we also need to
change the definition

  _INVALID_HANDLE_VALUE = -1

to

  _INVALID_HANDLE_VALUE = _HANDLE(-1).value

Otherwise, tests for equality to _INVALID_HANDLE_VALUE in code like

  def _getfileinfo(name):
      fh = _kernel32.CreateFileA(name, 0,
              _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE,
              None, _OPEN_EXISTING, 0, None)
      if fh == _INVALID_HANDLE_VALUE:
          _raiseoserror(name)

would now fail to detect an invalid handle, which in turn would lead to
exceptions raised with wrong errno values, like e.g.

  >>> nlinks('missing.txt')
  Traceback (most recent call last):
  ...
  OSError: [Errno 9] missing.txt: The handle is invalid.

instead of the correct (as per this patch and before it)

  >>> nlinks('missing.txt')
  Traceback (most recent call last):
  ...
  OSError: [Errno 2] missing.txt: The system cannot find the file specified.

# debugshell extension
"""a python shell with repo, changelog & manifest objects"""

import mercurial
import code

def debugshell(ui, repo, **opts):
    objects = {
        'mercurial': mercurial,
        'repo': repo,
        'cl': repo.changelog,
        'mf': repo.manifest,
    }
    bannermsg = "loaded repo : %s\n" \
                "using source: %s" % (repo.root,
                                      mercurial.__path__[0])
    code.interact(bannermsg, local=objects)

cmdtable = {
    "debugshell|dbsh": (debugshell, [])
}