# File lib/chef/resource/conditional.rb, line 45 def initialize(positivity, command=nil, command_opts={}, &block) @positivity = positivity case command when String @command, @command_opts = command, command_opts @block = nil when nil raise ArgumentError, "only_if/not_if requires either a command or a block" unless block_given? @command, @command_opts = nil, nil @block = block else raise ArgumentError, "Invalid only_if/not_if command: #{command.inspect} (#{command.class})" end end