add_master_key_file

# File railties/lib/rails/generators/rails/master_key/master_key_generator.rb, line 13
      def add_master_key_file
        unless MASTER_KEY_PATH.exist?
          key = ActiveSupport::EncryptedFile.generate_key

          log "Adding #{MASTER_KEY_PATH} to store the master encryption key: #{key}"
          log ""
          log "Save this in a password manager your team can access."
          log ""
          log "If you lose the key, no one, including you, can access anything encrypted with it."

          log ""
          add_master_key_file_silently(key)
          log ""
        end
      end