source 'https://rubygems.org' gem 'simplecov', require: false, group: :test activemodel_version = ENV.fetch('ACTIVEMODEL_VERSION', '6.1') activemodel = case activemodel_version when '3.2' then '3.2.22' when '4.0' then '4.0.13' when '4.1' then '4.1.16' when '4.2' then '4.2.11' when '5.0' then '5.0.7' when '5.1' then '5.1.7' when '5.2' then '5.2.3' when '6.0' then '6.0.0.rc1' end if activemodel_version < '6.1' gem 'activemodel', activemodel gem 'activesupport', activemodel end minitest = activemodel_version < '4.1' ? '~> 4.2' : '~> 5.0' gem 'minitest', minitest # Specify your gem's dependencies in u-attributes.gemspec gemspec