Custom reporter

Build a custom reporter

Take a look at ktlint-reporter-plain.

In short, all you need to do is to implement a Reporter and make it available by registering a custom ReporterProvider using META-INF/services/com.pinterest.ktlint.core.ReporterProvider. Pack all of that into a JAR and you're done.

To load a custom (3^rd party) reporter use ktlint --reporter=name,artifact=/path/to/custom-ktlint-reporter.jar (see ktlint --help for more).

Third party reporters

Known third-party reporters:

• kryanod/ktlint-junit-reporter reports ktlint output as an xml file in JUnit format so that the ktlint report can be made visible on the Merge Request page.
• musichin/ktlint-github-reporter uses GitHub workflow commands to set error messages for ktlint issues.
• tobi2k/ktlint-gitlab-reporter provides output in JSON format that can be parsed by GitLab automatically.