jenkins-configure-buil-rotate.groovy

import jenkins.model.Jenkins
import hudson.model.Job
import jenkins.model.BuildDiscarderProperty
import hudson.tasks.LogRotator

def total = 0

// LogRotator ( daysToKeep, numToKeep, artifactDaysToKeep, artifactNumToKeep)
// daysToKeep:  If not -1, history is only kept up to this days.
// numToKeep: If not -1, only this number of build logs are kept.
// artifactDaysToKeep: If not -1 nor null, artifacts are only kept up to this days.
// artifactNumToKeep: If not -1 nor null, only this number of builds have their artifacts kept.

Jenkins.getInstance().getAllItems().each {
  	if(
      it?.getDescriptor().getDisplayName() == "Pipeline" &&
      it.isBuildable() && 
      it.supportsLogRotator() && 
      it.getProperty(BuildDiscarderProperty) == null
    ) {
      println  "Configure: ${it.getFullName()}"
      it.addProperty(new BuildDiscarderProperty(new LogRotator ( -1, 10, -1, 10)))
      total++
  	}
}
total