ApproveScript.groovy

//
// This Groovy snippet is used for Jenkins Job DSL groovy script,
// when ...
// 1. enable Jenkins Global Security
// 2. use pipelineJob
// 3. want to approve pipeline cps automatically
//

import jenkins.model.Jenkins

//
// Here is the Job DSL
//
pipelineJob("${The Pipeline Job Name}") {
  definition {
    cps {
      script(readFileFromWorkspace("${Jenkins Pipeline Script Path}"))
    }
  }
}

//
// Add below Groovy snippet into Job DSL groovy script,
// then the Jenkins pipeline script can be approved automaitcally
// P.S. don't forgot to customize ${Jenkins Pipeline Script Path}
//

def groovyscript = readFileFromWorkspace("${Jenkins Pipeline Script Path}")
def scriptApproval = Jenkins.instance.getExtensionList('org.jenkinsci.plugins.scriptsecurity.scripts.ScriptApproval')[0]
scriptApproval.approveScript(scriptApproval.hash(groovyscript, 'groovy'))

//
// If your pipeline script include method which not allow by Jenkins,
// Add below Groovy snippet into Job DSL groovy script,
// the method can be approved automatically.
// P.S. don't forgot to customize ${The Method Need To Be Approve}
//

// repeat this line if want to approve more method automatically
scriptApproval.approveSignature("${The Method Need To Be Approve}")