module Gem::SecurityOption

def add_security_option
  OptionParser.accept Gem::Security::Policy do |value|
    require 'rubygems/security'
    raise OptionParser::InvalidArgument, 'OpenSSL not installed' unless
      defined?(Gem::Security::HighSecurity)
    policy = Gem::Security::Policies[value]
    unless policy
      valid = Gem::Security::Policies.keys.sort
      raise OptionParser::InvalidArgument, "#{value} (#{valid.join ', '} are valid)"
    end
    policy
  end
  add_option(:"Install/Update", '-P', '--trust-policy POLICY',
             Gem::Security::Policy,
             'Specify gem trust policy') do |value, options|
    options[:security_policy] = value
  end
end