gistfile1.txt

# reek does this at the top level somewhere
# (which means you could define your own smell at the top level somewhere too)
smell :duplication do |code|
  code.methods.where do |method|
    method.method_calls.where do |call|
      method.method_calls.where do |call2|
        call2 == call
          end.count > 1
        end.count > 1
      end
    end
  end
end

# then in my client app, i do this:
for_smell :duplication do |smell|
  smell.where(method.name != :method_in_which_to_ignore_duplication)
end