My default rails gemfile

gems.rb

source 'https://rubygems.org'

BUNDLE_RAILS_VERSION = '~> 4.2.4'

# Rails
gem 'railties',      BUNDLE_RAILS_VERSION
gem 'activesupport', BUNDLE_RAILS_VERSION
gem 'actionpack',    BUNDLE_RAILS_VERSION
gem 'actionmailer',  BUNDLE_RAILS_VERSION
gem 'activejob',     BUNDLE_RAILS_VERSION
gem 'actionview',    BUNDLE_RAILS_VERSION

# Database
gem 'sequel', '~> 4.27'
gem 'sequel-rails'
gem 'sequel_pg', require: 'sequel'
gem 'sequel_postgresql_triggers'

# Optimizations
gem 'oj'
gem 'oj_mimic_json'

gem 'thor'

group :production do
  gem 'puma'
end

group :development, :test do
  gem 'pry'
  gem 'pry-rails'
  gem 'pry-byebug'
end

group :development do
  gem 'binding_of_caller'
  gem 'better_errors'

  gem 'letter_opener'
end

group :test do
  gem 'rspec-rails'
  gem 'rspec-sequel_expectations', github: 'Ptico/rspec-sequel_expectations'

  gem 'capybara'

  gem 'ffaker'
  gem 'fabrication'
  gem 'database_cleaner'

  gem 'rack-test', require: 'rack/test'
end

group :metrics do
  gem 'simplecov'
  gem 'reek'
  gem 'rubocop'
end