It turns out that the SSL Certificate needed to be accepted and cached
locally. The retrieve.xml Ant script gets the content of the temp feature
from the server, but the commands fail silently and result in empty
feature.xml and build.properties files. Maybe there is some way to verify
that the commands executed properly and producing a more helpful error
message.
Another solution is to use the Subversion version 1.6.0 option
"--trust-server-cert", but that option is not on the version 1.5.4, which
comes with the current stable release of Ubuntu.
To fix the issue for a single machine, execute the following on the
command line and press P to accept the server certificate permanently:
For those of you reading this that might be interested, I solved this
problem by checking out the SVN PDE build source code from Eclipse SVN and
built the source bundle for the SVN PDE build plug-in. I then inserted the
exported plug-ins into my running Eclipse, and set up a launcher in Debug
mode. I was able to trace through the code to find the location where the
failure occurred.