Shortcut for current URL in a working copy?

I'm in some directory of a working copy, and I would like to copy
a file that was deleted from this directory. I can do this with
something like:

  svn copy -r1234 svn+ssh://path/to/file newfile

I can find the base URL svn+ssh://path/to with "svn info".

Now, is there a way to do this without using "svn info"? Something
like "svn copy -r1234 current:/file newfile"? i.e. where "current:"
means `svn info | sed -n 's/^URL: \(.*\)/\1/p'` (for Unix users).
That would really be nice.

Regards,

-- 
Vincent Lefèvre <vincent_at_vinc17.org> - Web: <http://www.vinc17.org/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
Work: CR INRIA - computer arithmetic / SPACES project at LORIA
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