gistfile1.rb

# For easier parsing of command line arguments in cap                                                    
def get_argument(parameter, opts={})                                                                     
  default = opts[:default] || false                                                                      
                                                                                                         
  result = ENV[parameter.downcase] || ENV[parameter.upcase] or return default                            
  trues, falses = %w(y yes t true), %w(n no f false)                                                     
                                                                                                         
  if (trues + falses).include?(result.downcase)                                                          
    result = false if falses.include?(result.downcase)                                                   
    result = true if trues.include?(result.downcase)                                                     
  else                                                                                                   
    result                                                                                               
  end                                                                                                    
end