Module: PumaPlus::AppLoader::MiniBuilder

Defined in:
lib/puma_plus/app_loader.rb

Overview

A stand-in for Rack::Builder supporting just run and use, so an example config.ru works with no gems installed. Not a Rack::Builder replacement -- real apps should install rack.

Class Method Summary collapse

Class Method Details

.build(source, path) ⇒ Object 



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# File 'lib/puma_plus/app_loader.rb', line 41

def self.build(source, path)
  builder = new_builder
  builder.instance_eval(source, path, 1)
  builder.to_app
end

.new_builder ⇒ Object 



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# File 'lib/puma_plus/app_loader.rb', line 47

def self.new_builder
  Object.new.tap do |o|
    o.instance_variable_set(:@run, nil)
    o.instance_variable_set(:@use, [])
    def o.run(app) = @run = app
    def o.use(middleware, *args, &blk) = @use << [middleware, args, blk]
    def o.map(*) = raise(NotImplementedError, "map requires the rack gem")

    def o.to_app
      raise "config.ru never called run()" unless @run

      @use.reverse.inject(@run) do |app, (mw, args, blk)|
        mw.new(app, *args, &blk)
      end
    end
  end
end