https://integration.wikimedia.org/ci/job/operations-puppet-wmf-style-guide/ polls operations/puppet.git and run global:wmf_style. It then craft a report. It fails to build:
00:01:58.766 Gem::InstallError: minitest requires Ruby version ~> 2.2. 00:01:58.824 An error occurred while installing minitest (5.13.0), and Bundler cannot
We should migrate it to use docker-registry.wikimedia.org/releng/operations-puppet and setting RAKE_TARGET=global:wmf_style.
The job should also detect new failures and emit an email when they are encountered.