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

Question

I\'m writing a small Ruby command-line application that uses fileutils from the standard library for file operations. Depending on how the user invokes the applicat

Answer 1

Conditionally including the module through the send methods works for me as in the below tested example:

class Artefact
  include HPALMGenericApi
  # the initializer just sets the server name we will be using ans also the 'transport' method : Rest or OTA (set in the opt parameter)
  def initialize server, opt = {}  
    # conditionally include the Rest or OTA module
    self.class.send(:include, HPALMApiRest) if (opt.empty? || (opt && opt[:using] opt[:using] == :Rest)) 
    self.class.send(:include, HPALMApiOTA) if (opt && opt[:using] opt[:using] == :OTA)    
    # ... rest of initialization code  
  end
end