rake task with easy interface

Right now I can do

rake report shipment_id=5

rake report do
  id = ENV['shipment_id]
end

However I want to simplify the interace to the user by having

rake report 5

How do I do that in rake?

Last resort would be to use ruby and then call rake internally but I want to 开发者_StackOverflow中文版check if I am missing some feature of rake?

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This could be useful: Rails Rake: How to pass in arguments to a task with :environment

Although its only for newer versions of rake.