//
//  Author: Hari Sekhon
//  Date: 2021-04-08 19:16:17 +0100 (Thu, 08 Apr 2021)
//
//  vim:ts=4:sts=4:sw=4:noet
//
//  https://github.com/HariSekhon/DevOps-Bash-tools
//
//  License: see accompanying Hari Sekhon LICENSE file
//
//  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
//
//  https://www.linkedin.com/in/HariSekhon
//

// Paste this into $JENKINS_URL/script
//
// Jenkins -> Manage Jenkins -> Script Console

// WARNING: you can run into all sorts of state problems with the Milestone plugin preventing your builds from running due to a remnant reference to a higher build number - this also happens on job restores which start from build #1 again
//
//			[2022-08-02T16:14:46.501Z] Trying to pass milestone 0
//			[2022-08-02T16:14:46.501Z] Canceled since build #3814 already got here
//
//			https://issues.jenkins.io/browse/JENKINS-38641
//
//			one fix is of course to do
//
//				job.nextBuildNumber = 3815

// XXX: Edit this to the name of your job pipeline
String jobName = "My Dev Pipeline"

// Simple Job
//def job = Jenkins.instance.getItem(jobName)
//
// XXX: must specify the branch for Multibranch Pipelines
//def job = Jenkins.instance.getItemByFullName("$jobName/master")
//
// but this method can also handle simple jobs so use it for everything
def job = Jenkins.instance.getItemByFullName(jobName)

// deletes the previous build history
//job.getBuilds().each { it.delete() }
job.builds().each { it.delete() }  // more groovyish

// XXX: don't reset this build number as it can break the Milestone plugin for this job, see comment above for more details
//job.nextBuildNumber = 1

job.save()