[TIP] tox vs buildout

Chris Withers chris at simplistix.co.uk
Fri Dec 16 00:09:36 PST 2011

On 14/12/2011 11:05, holger krekel wrote:
> There is an undocumented option of specifying sdistsrc=PATH
> in the [tox] section.  That might help.

This is great :-)
I'd suggest documenting this and making it official!

So, I'm a lot further on now, I have three outstanding concerns:

- testing dependencies

It seems that my current practice of doing the equivalent of running 
"python setup.py testfixtures[test]" to install the testing dependencies 
isn't enough.

What would work with tox? Can I pip install from a requirements file to 
get my test dependencies to be installed? If so, what should I put in my 
tox.ini to make sure I install into the right tox virtualenv?

- what code is being run and tested?

 From my current best run:

[TOX] /Users/chris/LocalGIT/testfixtures/.tox/py26/log$ ../bin/pip 
--download-cache=/Users/chris/LocalGIT/testfixtures/.tox/_download -U 
--no-deps ../../../dist/testfixtures-2.3.3.tar.gz >3.log
[TOX] /Users/chris/LocalGIT/testfixtures$ .tox/py26/bin/nosetests

Now, as read, nose will scan for tests in (and might well import 
software from!) my checkout, rather than the sdist that's just been 
installed. What's the tox-recommended way of avoiding this?

Put "cd .tox" as one of my commands?
Can I specify that the working directory should be the current 
virtualenv that tox is using?

- EPD Python2.7 versus virtualenv

So, my Python 2.7 comes from EPD on Mac OS X, and Tox complains about 
this as follows:

[TOX] /Users/chris/LocalGIT/testfixtures/.tox$ 
--distribute --no-site-packages py27 >py27/log/0.log
[TOX] ERROR: invocation failed, logfile: 
[TOX] ERROR: /Users/chris/LocalGIT/testfixtures/.tox$ 
--distribute --no-site-packages py27 >py27/log/0.log
The --no-site-packages flag is deprecated; it is now the default behavior.
New python executable in py27/bin/python2.7
Also creating executable in py27/bin/python
ERROR: The executable py27/bin/python2.7 is not functioning
ERROR: It thinks sys.prefix is 
u'/Library/Frameworks/EPD64.framework/Versions/7.1' (should be 
ERROR: virtualenv is not compatible with this system or executable

[TOX] ERROR: InvocationError: 
--distribute --no-site-packages py27 (see 

What's wrong here?
Also, why is Tox using 
Users/chris/buildout-eggs/virtualenv-1.7-py2.6.egg/virtualenv.py ?



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