id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
1383	foolscap 0.6.1 has no such extra feature  'secure_connections'	zooko	charlesnw	"Charles N Wyble posted this:

http://tahoe-lafs.org/pipermail/tahoe-dev/2011-March/006239.html

{{{
harles at charles-laptop:~/projects/bluejacket/allmydata-tahoe-1.8.2$ 
python setup.py build
Traceback (most recent call last):
   File ""setup.py"", line 78, in <module>
     import setuptools; setuptools.bootstrap_install_from = egg
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/setuptools/__init__.py"", 
line 2, in <module>
     from setuptools.extension import Extension, Library
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/setuptools/extension.py"", 
line 2, in <module>
     from dist import _get_unpatched
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/setuptools/dist.py"", 
line 6, in <module>
     from setuptools.command.sdist import sdist
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/setuptools/command/sdist.py"", 
line 5, in <module>
     import os, re, sys, pkg_resources
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/pkg_resources.py"", 
line 2628, in <module>
     working_set.require(__requires__)
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/pkg_resources.py"", 
line 676, in require
     needed = self.resolve(parse_requirements(requirements))
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/pkg_resources.py"", 
line 580, in resolve
     requirements.extend(dist.requires(req.extras)[::-1])
   File 
""/home/charles/projects/bluejacket/allmydata-tahoe-1.8.2/setuptools-0.6c16dev3.egg/pkg_resources.py"", 
line 2181, in requires
     ""%s has no such extra feature %r"" % (self, ext)
pkg_resources.UnknownExtra: foolscap 0.6.1 has no such extra feature 
'secure_connections'
charles at charles-laptop:~/projects/bluejacket/allmydata-tahoe-1.8.2$
}}}

I guess you have an installation of foolscap which doesn't declare that it has an extra feature named {{{'secure_connections'}}}. Tahoe-LAFS specifies that it depends on foolscap ''with'' the {{{'secure_connections'}}} feature.
"	defect	closed	major	1.9.0	packaging	1.8.2	fixed	setuptools foolscap pyOpenSSL	charles@…	782414