[Zope-ZEO] BTree setup script, and import wackiness

[Andrew Kuchling]

Adding to the collection of setup.py scripts, one for the BTree
directory is appended.

After installing the BTree modules, I noticed some wackiness with
importing it:

>>> import BTree
import ExtensionClass # dynamically loaded from /www/python/lib/python1.5/site-packages/ExtensionClass.so
Traceback (innermost last):
  File "<stdin>", line 1, in ?
ImportError: No module named cPersistence

cPersistence.so is in the ZODB package.  If you start a new
interpreter and import ZODB first, then importing BTree works:

>>> import ZODB
import ZODB # directory /www/python/lib/python1.5/site-packages/ZODB
# /www/python/lib/python1.5/site-packages/ZODB/__init__.pyc matches /www/python/lib/python1.5/site-packages/ZODB/__init__.py
import ZODB # precompiled from /www/python/lib/python1.5/site-packages/ZODB/__init__.pyc
 ... much deleted ...
>>> import BTree
import BTree # dynamically loaded from /www/python/lib/python1.5/site-packages/BTree.so

I see dependencies on import order as a Bad Thing. I wonder if the
following line in BTree.c should be changed to use ZODB.cPersistence?
  if(cPersistenceCAPI=PyCObject_Import("cPersistence","CAPI"))

--amk

# Setup script for the BTree modules

from distutils.core import setup
from distutils.extension import Extension

INC_DIRS = ['../ExtensionClass', '../../python/ZODB']

BTree = Extension(name = 'BTree', include_dirs = INC_DIRS,
                  sources = ['BTree.c'] )
IIBTree = Extension(name = 'IIBTree', include_dirs = INC_DIRS,
                  sources = ['IIBTree.c'] )
IOBTree = Extension(name = 'IOBTree', include_dirs = INC_DIRS,
                  sources = ['IOBTree.c'] )
OIBTree = Extension(name = 'OIBTree', include_dirs = INC_DIRS,
                  sources = ['OIBTree.c'] )
intSet = Extension(name = 'intSet', include_dirs = INC_DIRS,
                  sources = ['intSet.c'] )

setup(name = 'BTree',
      version = "XXX",
      description = "XXX",
      author = "Jim Fulton",
      author_email = "XXX",
      url = "XXX",

      ext_modules = [BTree, IIBTree, IOBTree, OIBTree, intSet] )