The -x option sets your plugin up as an svn:external, to track updates
I tried to remove a plugin, and got this:
$ svn rm naugty-plugin/ --force
svn: ‘naughty-plugin’ is not under version control
That’s not a good sign. Then I svn ci my project, cap deploy it, and
the plugin (and its ill effects) are still on the server.
How to croak an svn:externalled plugin?
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!