module Fog class Compute def self.new(attributes) attributes = attributes.dup # prevent delete from having side effects case provider = attributes.delete(:provider) when 'AWS' require 'fog/aws' Fog::AWS::Compute.new(attributes) when 'Bluebox' require 'fog/bluebox' Fog::Bluebox::Compute.new(attributes) when 'Brightbox' require 'fog/brightbox' Fog::Brightbox::Compute.new(attributes) when 'GoGrid' require 'fog/go_grid' Fog::GoGrid::Compute.new(attributes) when 'Linode' require 'fog/linode' Fog::Linode::Compute.new(attributes) when 'NewServers' require 'fog/new_servers' Fog::NewServers::Compute.new(attributes) when 'Rackspace' require 'fog/rackspace' Fog::Rackspace::Compute.new(attributes) when 'Slicehost' require 'fog/slicehost' Fog::Slicehost::Compute.new(attributes) else raise ArgumentError.new("#{provider} is not a recognized compute provider") end end end end