How can I choose which version of a module to include dynamically in Ruby? -

I am writing a Ruby command line application which uses fileutils from the standard library Based on how the invite user invites the app, I include the FileUtils , FileUtils :: DryRun or FileUtils :: Verbose Would like to

Since is included is private, however, I can not put arguments to choose the object in the initialize method (this was my first thought, then I could simply pass the information about the user's choice as a parameter of the new .) I have come up with two options that start working, but I either:

1. Set a global variable in the name of the app on the basis of user's choice, and then Las including conditional in include:

     class Worker Case app :: option "File Utils :: Drain etc. in dry runs".  

2. Create sub-classes, where the only difference is that the version of FileUtils contains the appropriate one on the basis of user choice Select.

     FileUtils in class worker # End class worker in shared workarms :: Dryn & lt; FileUtils :: DryRun and Class worker in Worker :: Verbose & lt; FileUtils :: Verbose End  

The first method seems to be drill-er in the worker, but I hope there is something more simple than this that I have not thought to be. / P>

So what if it's private?

  class worker def if verbose (class ; self; includes FileUtils :: Verbose; end) and (class  FileUtils :: something  special  worker  'Metaclass - main code in "test" and end   / Pre> 
 Various workers can use different  FileUtils  in this way, not in the  category.