class Pry::CommandSet::Command

def call(context, *args)
  if stub_block = options[:stub_info]
    context.instance_eval(&stub_block)
  else
    ret = context.instance_exec(*correct_arg_arity(block.arity, args), &block)
    if options[:keep_retval]
      ret
    else
      Pry::CommandContext::VOID_VALUE
    end
  end
end

def correct_arg_arity(arity, args)
  case arity <=> 0
  when -1
    args
  when 0
    []
  when 1
    # another jruby hack
    if Pry::Helpers::BaseHelpers.jruby?
      args[0..(arity - 1)]
    else
      args.values_at 0..(arity - 1)
    end
  end
end