Rakefile in u3d-1.1.5 vs Rakefile in u3d-1.2.0

@@ -185,9 +185,10 @@
   sh 'git push'
 end
 
 desc 'Update the changelog, no commit made'
 task :changelog do
+  UI.user_error!('No CHANGELOG_GITHUB_TOKEN in the environment') unless ENV.key? 'CHANGELOG_GITHUB_TOKEN'
   puts "Updating changelog #{ENV['CHANGELOG_GITHUB_TOKEN']}"
   sh "github_changelog_generator" if ENV['CHANGELOG_GITHUB_TOKEN']
 end
 
 desc 'Run all rspec tests'