source 'https://rubygems.org'
gemspec

compatible_rails_versions = [
  '>= 3.0.0',
  ('<5' if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.2.2'))
].compact

gem 'activesupport', (ENV['RAILS_VERSION'] || compatible_rails_versions), require: false
gem 'i18n', require: false
gem 'tzinfo', require: false # only needed explicitly for RAILS_VERSION=3
