edit

# File railties/lib/rails/commands/credentials/credentials_command.rb, line 18
      def edit
        load_environment_config!
        load_generators

        if environment_specified?
          @content_path = "config/credentials/#{environment}.yml.enc" unless config.overridden?(:content_path)
          @key_path = "config/credentials/#{environment}.key" unless config.overridden?(:key_path)
        end

        ensure_encryption_key_has_been_added
        ensure_credentials_have_been_added
        ensure_diffing_driver_is_configured

        change_credentials_in_system_editor
      end