interesting setup

Gemfile

# encoding: utf-8
source :gemcutter
source 'http://gems.github.com'

# Rails 2.x style.
group :rails do
  gem 'rails', '~> 2.3.5', :require => nil
  gem 'builder', '~> 2.1.2'
  gem 'memcache-client', '>= 1.7.4', :require => nil
  gem 'tzinfo', '~> 0.3.12'
  gem 'i18n', '>= 0.1.3'
  gem 'tmail', '~> 1.2.3'
  gem 'text-format', '>= 0.6.3', :require => 'text/format'
end

# General
gem 'nokogiri'

# Controllers.
gem 'has_scope'
gem 'inherited_resources'

# Authentication + Authorization.
gem 'devise' # << gem warden
gem 'declarative_authorization'

# Facebook (Connect).
gem 'facebooker'
gem 'devise_facebook_connectable'

# Views: Frameworks + Templating.
gem 'compass', '>= 0.10.0.pre4' # << gem 'haml'
gem 'RedCloth', :require => nil

# Views: Forms.
gem 'formtastic'
gem 'mail_form'

# Views: Helpers.
gem 'show_for'
gem 'tabletastic'

# JavaScript.
gem 'jrails'
gem 'sprockets'
gem 'sprockets-rails'

# Models: General.
# gem 'state_machine'
# gem 'safe_mass_assignment' # no gem

# Models: Scopes.
# gem 'can_search'

# Models: Validations
gem 'validation_reflection'

# MVC.
gem 'will_paginate'

# Configuration.
gem 'settingslogic'

# I18n.
# gem 'i18n_data' # country/language data

# Images
# gem 'dragonfly'

# E-mails.
gem 'sanitize_email'
# gem 'mail_style'   # styling e-mails using stylesheets to inline styles.
# gem 'grimen-delayed_job_mailer', :lib => 'delayed_job_mailer'

# Job queue
# gem 'delayed_job'

# Domains.
gem 'subdomain-fu'

# SEO.
gem 'friendly_id'
gem 'sitemap_generator'

# Database seeding.
gem 'machinist'
gem 'forgery'

#except :production do
  # Database.
  gem 'sqlite3-ruby', :require => 'sqlite3'

  # Console
  gem 'hirb'
#end

#only :development do
  # Debugging.
  if RUBY_VERSION >= '1.9'
    gem 'ruby-debug19', :require => 'ruby-debug'
  else
    gem 'ruby-debug'
  end

  # OS X only...
  if RUBY_PLATFORM =~ /darwin/
    # gem 'rails-footnotes', :version => '3.6.3'
  end

  # Deployment.
  gem 'capistrano'
  gem 'capistrano-ext', :require => 'capistrano'

  # Scaffolding (generators).
  gem 'dry_scaffold', :require => false

  # Optimization.
  gem 'request-log-analyzer', :require => nil
  gem 'annotate', :require => nil
  # gem 'rails_best_practices', :require => nil
  gem 'bullet'

  # Documentation.
  gem 'railroad', :require => nil

  # E-mails.
  gem 'inaction_mailer', :require => 'inaction_mailer/force_load'
#end

#only [:test, :cucumber] do
  # Integration.
  gem 'cucumber'
  # gem 'pickle'
  gem 'webrat', :require => nil
  # gem 'watircuce', :require => false
  # gem 'rack-test', :require => 'rack/test'

  # Unit.
  gem 'test-unit', :require => 'test/unit'
  # gem 'shoulda'
  gem 'rspec', :require => nil
  gem 'rspec-rails', :require => 'spec/rails'
  gem 'rspec_tag_matchers'
  # gem 'remarkable_rails', :require => nil
  # gem 'fakeweb'

  # Mocking/Stubbing.
  gem 'rr', :require => false
  # gem 'mocha'

  # E-mails.
  gem 'email_spec'

  # HTML/CSS standards.
  # gem 'w3c_validators'

  # Output.
  gem 'redgreen'

  # TODO: testing "cells": http://github.com/kpumuk/rspec-cells/
#end

#only [:production, :staging] do
  # Crontab/Backup.
  gem 'whenever', :require => nil
  # gem 'backup'

  # Rewrite rules.
  gem 'rack-rewrite'

  # Analytics.
  gem 'newrelic_rpm'
  gem 'hoptoad_notifier'
  gem 'google_analytics', :require => 'rubaidh/google_analytics'

  # Storage.
  # gem 'aws-s3',            :require => 'aws/s3'

  # Caching.
  # gem 'rack-cache',        :require => 'rack/cache'
  # gem 'memcache-client',   :require => 'memcache'
#end

preinitializer.rb

# encoding: utf-8

# Load Bundler.
begin
  # Require the preresolved locked set of gems.
  require File.expand_path(File.join(*%w[.. .. .bundle environment]), __FILE__)
rescue LoadError
  # Fallback on doing the resolve at runtime.
  require 'rubygems'
  require 'bundler'
  Bundler.setup
end