class Gem::Commands::SourcesCommand

def check_rubygems_https source_uri # :nodoc:
  uri = URI source_uri
  if uri.scheme and uri.scheme.downcase == 'http' and
     uri.host.downcase == 'rubygems.org' then
    question = <<-QUESTION.chomp
tps://rubygems.org is recommended for security over #{uri}
 you want to add this insecure source?
    QUESTION
    terminate_interaction 1 unless ask_yes_no question
  end
end