Modified config/application.rb to print out initialization points for Rails 3.2.11

application.rb

require File.expand_path('../boot', __FILE__)

require 'rails/all'

if defined?(Bundler)
  # If you precompile assets before deploying to production, use this line
  Bundler.require(*Rails.groups(:assets => %w(development test)))
  # If you want your assets lazily compiled in production, use this line
  # Bundler.require(:default, :assets, Rails.env)
end

module Rails
  class Application < Engine
    def initializers
      bootstrap = Bootstrap.initializers_for(self) #BOOTSTRAP
      railties = super #RAILTIES
      finisher = Finisher.initializers_for(self) #FINISHER
      if Rails.env.development?
        print_initializers(bootstrap, "#BOOTSTRAP")
        print_initializers(railties, "#RAILTIES")
        print_initializers(finisher, "#FINISHER")
      end
      bootstrap + railties + finisher
    end

    def print_initializers(initializers, stage)
      p stage
      initializers.each do |i|
        p i.name
      end
      p "----------------------------"
    end
  end
end

module RoastCode
  class Application < Rails::Application
    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.

    # Custom directories with classes and modules you want to be autoloadable.
    config.autoload_paths += %W(#{config.root}/extras)
    config.autoload_paths += %W(#{config.root}/lib)
    config.autoload_paths += Dir["#{config.root}/lib/**/"]

    # Only load the plugins named here, in the order given (default is alphabetical).
    # :all can be used as a placeholder for all plugins not explicitly named.
    # config.plugins = [ :exception_notification, :ssl_requirement, :all ]

    # Activate observers that should always be running.
    # config.active_record.observers = :cacher, :garbage_collector, :forum_observer

    # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
    # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
    # config.time_zone = 'Central Time (US & Canada)'

    # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
    # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
    # config.i18n.default_locale = :de

    # Configure the default encoding used in templates for Ruby 1.9.
    config.encoding = "utf-8"

    # Configure sensitive parameters which will be filtered from the log file.
    config.filter_parameters += [:password]

    # Enable the asset pipeline
    config.assets.enabled = true

    # Version of your assets, change this if you want to expire all your assets
    config.assets.version = '1.0'
  end
end

output.rb

"#BOOTSTRAP"
:load_environment_hook
:load_active_support
:preload_frameworks
:initialize_logger
:initialize_cache
:initialize_dependency_mechanism
:bootstrap_hook
"----------------------------"
"#RAILTIES"
"i18n.callbacks"
"active_support.initialize_whiny_nils"
"active_support.deprecation_behavior"
"active_support.initialize_time_zone"
"action_dispatch.configure"
"action_view.embed_authenticity_token_in_remote_forms"
"action_view.cache_asset_ids"
"action_view.javascript_expansions"
"action_view.set_configs"
"action_view.caching"
"action_controller.logger"
"action_controller.initialize_framework_caches"
"action_controller.assets_config"
"action_controller.set_configs"
"action_controller.compile_config_methods"
"active_record.initialize_timezone"
"active_record.logger"
"active_record.identity_map"
"active_record.set_configs"
"active_record.initialize_database"
"active_record.log_runtime"
"active_record.set_reloader_hooks"
"active_record.add_watchable_files"
"action_mailer.logger"
"action_mailer.set_configs"
"action_mailer.compile_config_methods"
"active_resource.set_configs"
"sprockets.environment"
:setup_sass
:setup_compression
:set_load_path
:set_autoload_paths
:add_routing_paths
:add_locales
:add_view_paths
:load_environment_config
:append_assets_path
:prepend_helpers_path
:load_config_initializers
:engines_blank_point
"----------------------------"
"#FINISHER"
:add_generator_templates
:ensure_autoload_once_paths_as_subset
:add_builtin_route
:build_middleware_stack
:define_main_app_helper
:add_to_prepare_blocks
:run_prepare_callbacks
:eager_load!
:finisher_hook
:set_routes_reloader_hook
:set_clear_dependencies_hook
:disable_dependency_loading
"----------------------------"
Loading development environment (Rails 3.2.11)
1.9.3p327 :001 > 

Based on this excellent post and some help from the guide.

Overridden lines are marked here.