[Zope] Deploying with buildout

Ross Patterson me at rpatterson.net
Tue Aug 28 18:25:07 EDT 2007

Chris McDonough <chrism at plope.com> writes:

> On Aug 28, 2007, at 5:55 PM, Ross Patterson wrote:
>>> Putting these packages in your Zope instance home's "lib/python"
>>> directory should get them found before the others.  For Products, you
>>> can use an additional "products-path" directive in zope.conf and put
>>> files in there.  I don't know how to tell buildout to do either,
>>> though.
>> But wouldn't that cause problems in this case since zope.app.interface
>> is a package in two nested-namespace packages.  IOW, wouldn't putting
>> zope/app/interface in $INSTANCE_HOME/lib/python mean that it was the
>> only package in the zope or zope.app namespace packages?
> Gah.  Yeah.  Sorry.  You might get away with creating and installing a
> custom zope.app.interface-myversion.egg into your Python's site- 
> packages dir and using something like:
> from pkg_resources import require
> require('zope.app.interface = myversion')
> ... in a script early on or do the equivalent within a .pth file in
> your site-packages dir.  Even after that, you *might* need to munge
> the PYTHONPATH, though, to prevent Zope from finding the one in
> SOFTWARE_HOME first. :-(
> I find Ian Bicking's virtual_python.py script very useful for trying
> things like this out.  I usually install both a custom version of
> Python and one or more virtual pythons in my automated scripts (using
> the --no-site-packages flag to virtual_python.py).  This means I can
> let distutils/setuptools packages install to site-packages "normally"
> without polluting the main Python installation's site-packages and so
> I don't need to go through gyrations to munge the PYTHONPATH for them
> to be found somewhere else.  I think buildout tends to prefer
> creating scripts that munge the path.

Great.  Thanks, I'll check those out.


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