tahoe 'make' fails at twisted, on leopard (macos 10.5)

[robk]

brian thought that this was related to #229

a quick scan of that seems to suggest it's something slightly different.

this is after upgrading my mac to 10.5, and removing the old built-for-10.4 python from my path, and trying to 'make' build tahoe.

Installed /Users/robk/trees/tahoe/support/lib/python2.5/site-packages/setuptools-0.6c8.egg
Searching for Twisted==2.5.0
Reading http://allmydata.org/trac/tahoe/wiki/Dependencies
Reading http://pypi.python.org/simple/Twisted/
Reading http://twistedmatrix.com/
Reading http://www.twistedmatrix.com
Reading http://twistedmatrix.com/products/download
Reading http://twistedmatrix.com/projects/core/
No local packages or download links found for Twisted==2.5.0
error: Could not find suitable distribution for Requirement.parse('Twisted==2.5.0')
make[1]: *** [build-once] Error 1
make: *** [build] Error 2

[robk]

I seem to remember there being something weird about the twisted that ships with 10.5 (which itself ships with python 2.5)

e.g. as far as python is concerned 'twisted' is already installed as v 2.5.0

#[Thu Jun 19 17:15:49] otto:~$ echo $PATH
~/Library/bin:/usr/local/bin:/usr/local/bin:/bin:/sbin:/usr/bin:/usr/sbin
#[Thu Jun 19 17:15:52] otto:~$ python
Python 2.5.1 (r251:54863, Apr 15 2008, 22:57:26) 
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import twisted
>>> from twisted.copyright import version
>>> version
'2.5.0'
>>> ^D

otoh, the notes in #229 suggest asking pkg_resources, which reports 2.4.0

#[Thu Jun 19 17:16:34] otto:~$ python -c 'import pkg_resources;print pkg_resources.require("twisted")'
[Twisted 2.4.0 (/System/Library/Frameworks/Python.framework/Versions/2.5/Extras/lib/python)]

neither of which goes any obvious way to explaining why setuptools requirement on 'twisted>=2.4.0' caused it to try and find 2.5.0 to install, given that 2.5.0 is not available in any of the places it looks.

I'm going to try installing the 8.0.1 .pkg installer from the twisted web site.