Jenkins - Delete old builds script

jenkins_delete_builds.groovy

MAX_BUILDS = 10 // max builds to keep
 
def jobs = Jenkins.instance.items;
 
for (job in jobs) {
    println "Job: " + job.name
    try {
        if(job instanceof jenkins.branch.MultiBranchProject) {
            println "Multibranch"
                job = job.getJob("master")
            } 
            def recent = job.builds.limit(MAX_BUILDS)
            println "Recent Builds: "  + recent
            println "============================="
        
                for (build in job.builds) {
                    if (!recent.contains(build) && !build.isBuilding()) {
                        println "Deleting: " + build
                        build.delete()
                        println ""
                    }
        }
    } catch(Exception ex) {
        continue
    }
}