Per @rompic's great idea on gitter.
https://github.com/jenkinsci/violation-comments-to-github-plugin
Violation-comments to github uses https://github.com/tomasbjerre/violations-lib
Which says in the read me:
Missing a format? Open an issue here!
I may also be able to have a look in a few days/weeks
Or you can add an option in Spotless to create a report on one of the formats supported by violations-lib.
Integration with https://github.com/reviewdog/reviewdog would also be nice
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Or you can add an option in Spotless to create a report on one of the formats supported by violations-lib.