# File lib/hoe/rcov.rb, line 16
  def define_rcov_tasks
    begin # take a whack at defining rcov tasks
      task :isolate # ensure it exists

      task :rcov => :isolate do
        sh(*make_rcov_cmd)
      end

      task :clobber_rcov do
        rm_rf "coverage"
      end

      task :clobber => :clobber_rcov

      # this is for my emacs rcov overlay stuff on emacswiki.
      task :rcov_overlay do
        path = ENV["FILE"]
        rcov, eol = Marshal.load(File.read("coverage.info")).last[path], 1
        puts rcov[:lines].zip(rcov[:coverage]).map { |line, coverage|
          bol, eol = eol, eol + line.length
          [bol, eol, "#ffcccc"] unless coverage
        }.compact.inspect
      end
    rescue LoadError
      # skip
      task :clobber_rcov # in case rcov didn't load
    end
  end