Set build number for Jenkins workflow (pipeline) builds

Question

I am migrating jenkins-workflow job to new template based workflow job. Because the build number is used as part of the version of build artifacts the workflow produces I have

Answer 1

A few notes:

• Jenkins Jobs and Folders are not serializable. Need to use @NonCPS
• Disable Groovy Sandbox, as globals like Jenkins.instance are not accessible otherwise
• Jenkins.instance.getItem() won't work well with folders. Use Jenkins.instance.getItemByFullName against the env.JOB_NAME
• Setting job.nextBuildNumber will take effect subsequent build, so go ahead and kick off the next one
• Make sure you return out of your pipeline so the initiating build doesn't continue with bad build number

Code:

@NonCPS
def updateBuildNumber(build_number) {
  def job = Jenkins.instance.getItemByFullName(env.JOB_NAME, Job.class)
  job.nextBuildNumber = build_number
  job.saveNextBuildNumber()
  build env.JOB_NAME
  return true
}