instance method generate_local_secret

# File railties/lib/rails/application.rb, line 671
      def generate_local_secret
        if config.secret_key_base.nil?
          key_file = Rails.root.join("tmp/local_secret.txt")

          if File.exist?(key_file)
            config.secret_key_base = File.binread(key_file)
          elsif secrets_secret_key_base
            config.secret_key_base = secrets_secret_key_base
          else
            random_key = SecureRandom.hex(64)
            FileUtils.mkdir_p(key_file.dirname)
            File.binwrite(key_file, random_key)
            config.secret_key_base = File.binread(key_file)
          end
        end

        config.secret_key_base
      end