tunneling & svn:externals issue?

Hi,

my organisation has switched to svn from cvs, and have in the main been very
happy with it.

Some of our developers live behind a http proxy that doesn't allow all of the
HTTP methods that subversion needs... thus we use the ssh port forwarding
approach described in the FAQ at
http://subversion.tigris.org/project_faq.html#paranoid, which works fine.

However, we also want to use svn:externals so that several of our projects can
automatically check out a shared module of code, and the 2 features don't seem
to work together.

To illustrate:
in the repository directory http://rd01.vpac.org/svn/StGermain/trunk, I set the
svn:externals property to:
spmodeldata http://rd01.vpac.org/svn/SPModel/trunk/data
All good so far, for those of us connecting directly it checks out the requested
eURL into an "spmodeldata" subdirectory.

But if someone is port-forwarding, so e.g. they have checked out the StGermain
repository through the url http://localhost:8888/svn/StGermain/trunk,
then they will be unable to fetch the svn:external due to the aforementioned
http proxy server problem when svn tries to grab it through http directly.

what we'd like to happen is for the http://rd01.vpac.org/svn/SPModel/trunk/data
in the svn:externals to be 'translated' to
http://localhost:8888/svn/SPModel/trunk/data automatically. Does svn have
support for this? I couldn't find any documentation on it, or any relevant
mailing list messages.

Any help greatly appreciated.

cheers, Patrick.

P.S. There was something in the FAQ page above that might be related:
"Joe Orton notes:
The server is sensitive to the hostname used in the Destination header
in MOVE and COPY requests, so you have to be a little careful here - a
"ServerAlias localhost" may be required to get this working properly."

but I'm not super apache savvy so it didn't really click with me.

-- 
Patrick Sunter
--------------
Visitor in Geophysics
Center for Advanced Computing Research
Mail Code : 158-79
California Institute Of Technology,
Pasadena, CA 91125, USA.
Ph : +1 (1) 626 395 2565
Fax : +1 (1) 626 584 5917
E-Mail : patrick@cacr.caltech.edu
--------------
Project Coordinator & Software Engineer
Victorian Partnership for Advanced Computing
E-Mail: patrick@vpac.org
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