class Bundler::CLI::Install

def check_trust_policy
  trust_policy = options["trust-policy"]
  unless Bundler.rubygems.security_policies.keys.unshift(nil).include?(trust_policy)
    raise InvalidOption, "RubyGems doesn't know about trust policy '#{trust_policy}'. " \
      "The known policies are: #{Bundler.rubygems.security_policies.keys.join(", ")}."
  end
  Bundler.settings.set_command_option_if_given :"trust-policy", trust_policy
end