From aecf82b5459b003f00724c22e13676d16bb42f72 Mon Sep 17 00:00:00 2001
From: Hari Sekhon <harisekhon@gmail.com>
Date: Sat, 26 Nov 2022 18:03:05 +0000
Subject: [PATCH] added jenkins_clear_build_history_all_jobs.groovy

---
 jenkins_clear_build_history_all_jobs.groovy | 40 +++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 jenkins_clear_build_history_all_jobs.groovy

diff --git a/jenkins_clear_build_history_all_jobs.groovy b/jenkins_clear_build_history_all_jobs.groovy
new file mode 100644
index 00000000..1298245b
--- /dev/null
+++ b/jenkins_clear_build_history_all_jobs.groovy
@@ -0,0 +1,40 @@
+//
+//  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
+
+// XXX: 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
+//
+//			but you'd either need to do that for only one specific job (see adjacent script jenkins_clear_build_history.groovy) or you'd need to set the build number to something higher than any of the jobs got to
+
+jenkins.model.Jenkins.instance.items.findAll().each {
+	println
+	def jobName = it.name
+	def job = Jenkins.instance.getItem(jobName)
+	job.getBuilds().each { it.delete() }
+	job.nextBuildNumber = 1
+	job.save()
+}