On Aug 27, 2007, at 10:59 PM, Ross Patterson wrote:
We have a Plone 3.0/Zope 2.10 application that we need to develop
on, maintain and
deploy to a ZEO server and multiple ZEO clients. Currently we use svn
bundles of Zope and Plone and our own packages and products in one big
svn:externals definition. We also use some more recent versions of
certain products and packages than those included in the upstream
svn:externals. For example:
Though I haven't seen any documentation to this effect, svn seems to
treat the second svn:externals as a "svn switch" on "svn up".
So one question I have is how would I "override" the versions of some
package like this using buildout?
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.
Another question I have is that there aren't releases for all the
dependencies our application has. I'm wondering what the best way
define a canonical release for deployment to our cluster. Ideally,
have a buildout (or whatever) on a staging server where we're testing
the candidate for deployment and then when all tests pass that *exact*
source should be deployed to the cluster.
I always use a vendor import for this (to a separate CVS server, I
don't use SVN).
How might one do this without
upstream releases? Is there a way to get buildout and setuptools to
play together so that I can build a source distribution from the test
passing buildout on staging? Is there a way I can have a buildout on
each cluster node such that a simple ./bin/buildout will get the
deployment release for that node?
Personally I use a script that knows about all of the revisions of
all of the products and packages I want to deploy, and which creates
a "sandbox", downloading and installing all of them (as well as
creating instances, etc). It doesn't work very well for upgrades,
but for starting a sandbox fresh, it's fine. See http://
agendaless.com/Members/chrism/software/buildit and http://
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