Running text finder build step should be possible also from pipeline scripts. To support this the plugin would need to be refactored according to pipeline development instructions: https://github.com/jenkinsci/pipeline-plugin/blob/master/DEVGUIDE.md
Made an attempt to add this, haven't done much Jenkins/Java development please review, https://github.com/jenkinsci/text-finder-plugin/pull/6
https://github.com/jenkinsci/text-finder-plugin/pull/12
Any plans for release?
See the documentation for usage information.