Where to store rack application initialization parameters?

Question

Ruby on Rails

Any rack application starts with config.ru, and since there is no single right way in Ruby ^tm , there are many approaches to organizing this "start point" of the entire project. In my current project, initialization is divided into two files, actually config.ru:

$:.unshift File.expand_path '..', __FILE__
require 'init'
run Awesomeapp

and init.rb:

require 'bundler
Bundler.require :default

Mongoid.load! 'db.yml', :development

Dragonfly.app.configure do
  datastore :mongoid
end

require 'app/models'
require 'app/lication'

I see no reason why the contents of init.rb should not be in config.ru, which actually prompted me to ask this question: how do you initialize the application? What is wrong with my method and what is good with yours?

Answer 1

config.ru

require_relative 'config/boot'

run Grape::RackBuilder.application

config/boot.rb

# Defines our constants
RACK_ENV = ENV['RACK_ENV'] || 'development'  unless defined?(RACK_ENV)
APP_ROOT = File.expand_path('../..', __FILE__) unless defined?(APP_ROOT)

# Load our dependencies
require 'rubygems' unless defined?(Gem)
require 'bundler/setup'
# Load initializers
Bundler.require(:default, RACK_ENV)

require_relative 'settings'

ApplicationSettings.source File.expand_path('config/application.yml', APP_ROOT)
ApplicationSettings.root = APP_ROOT

require_relative 'database'

Dir[File.join(File.dirname(__FILE__),'initializers/**/*.rb')].each {|file_name| require file_name}

Rabl.configure do |config|
  config.include_json_root = false
end

Grape::RackBuilder.setup do
  %w{api models lib uploaders models abilities jobs search_indexes}.each do |path|
    add_source_path ApplicationSettings.root("#{path}/**/*.rb")
    add_source_path ApplicationSettings.root("#{path}/*.rb")
  end

  use Warden::Manager do |config|
    config.strategies.add(:public_access_token, PublicTokenStrategy)
    config.default_strategies :public_access_token
    config.failure_app = API::Application
    config.intercept_401 = false
  end

  use Rack::Config do |env|
    env['api.tilt.root'] = ApplicationSettings.root('rabl')
  end

  mount 'API::Application', to: '/api'

  logger ApplicationSettings.logger(:rackbuilder)
end.boot!

In addition to config.ru, application initialization is also needed in spec_helper for testing. So breaking it down is a must.

Answer 2

Yes, in general, there is nothing wrong, it's just not clear why split into 2 files when there are 10 lines of code :)