# frozen_string_literal: true module Rack # Rack::Config modifies the environment using the block given during # initialization. # # Example: # use Rack::Config do |env| # env['my-key'] = 'some-value' # end class Config def initialize(app, &block) @app = app @block = block end def call(env) @block.call(env) @app.call(env) end end end