lib/concourse-resource/rubygems/support/source.rb in concourse-resource-rubygems-0.1.1 vs lib/concourse-resource/rubygems/support/source.rb in concourse-resource-rubygems-0.1.2

@@ -3,9 +3,12 @@
 module ConcourseResource
   module RubyGems
     module Support
       # Params for GemResource
       module Source
+        include ::Contracts::Core
+        include ::Contracts::Builtin
+
         Contract None => String
         def gem
           @gem ||= source.fetch 'gem'
         rescue KeyError
           STDERR.puts 'Params is missing gem'