Is it possible to change "svn:externals" property of subversion repository remotely?

Question

I am trying to change "svn:externals" property of a remote repository via this command:

svn ps svn:externals "vendor1 http://vendor_repo_here.com" http://main-repo-here.com

I am expecting above command to change the "svn:externals" property from whatever it is to "vendor1 http://vendor_repo_here.com".. But it throws an error:

Setting property on non-local target 'http://main-repo-here.com' needs a base revision.

So I try this:

svn ps -r HEAD svn:externals "vendor1 http://vendor_repo_here.com" http://main-repo-here.com

Now it says:

Cannot specify revision for versioned property 'svn:externals'

Am I doing something wrong? Is there anyway to change this remotely via command line?

Answer 1

from the help of svn propset:

propset (pset, ps): Set the value of a property on files, dirs, or revisions. usage: 1. propset PROPNAME PROPVAL PATH... 2. propset PROPNAME --revprop -r REV PROPVAL [TARGET]

1. Changes a versioned file or directory property in a working copy.
2. Changes an unversioned property on a repository revision. (TARGET only determines which repository to access.)

svn:externals is a versioned property, which cannot be changed in such way.

Answer 2

It's possible to change svn:externals remotely using TortoiseSVN:

TortoiseSVN > Repo-Browser > (select svn:externals dir) > Show Properties > Edit

That works for me.

It would be interesting to know why TortoiseSVN is able to yet svn cannot.