# File lib/vlad/subversion.rb, line 18
  def export(revision_or_source, destination)
    "#{svn_cmd} #{deploy_via} " +
      if revision_or_source =~ /^(\d+|head)$/i then
        "-r #{revision_or_source} #{repository} #{destination}"
      else
        "#{revision_or_source} #{destination}"
      end
  end