Reusing groovy script in jenkins Declarative pipeline file

Question

Is there a way to reuse groovy script loaded once in Jenkinsfile.

Right now this is what I am doing

            steps {
                script {
                    def util = load("${env.WORKSPACE}/scripts/build_util.groovy")
                    util.runStep1()
                }
            }
            steps {
                script {
                    def util = load("${env.WORKSPACE}/scripts/build_util.groovy")
                    util.runStep2()
                }
            }
            steps {
                script {
                    def util = load("${env.WORKSPACE}/scripts/build_util.groovy")
                    util.runStep3()
                }
            }

I am doing the same again in post build with multiple script blocks step to send mails.

Is there a better way to do this? I cannot use shared libraries.

Answer 1

Yes, you just need to load the script only once.

def util = load("${env.WORKSPACE}/scripts/build_util.groovy")

You can create a stage and load the script there and store in a variable and then do something like this:-

stage('Environment') {
     agent  { node { label 'master' } }
        steps {
          script {
                def util = load("${env.WORKSPACE}/scripts/build_util.groovy")
               }
            }
         }
post {
        // Things that we want done regardless of pipeline's outcome
        //
        always {

            // Push the overall statistics from all the stages to InfluxDB
            //
            node (LINUX_BUILD_NODE){
                script{
                    //Mail sending function call
                    //
                    util.runStep1()
                    util.runStep2()
                    util.runStep3()                        
                }
            }
        }
    }

You can use "util" in any stage to call the different functions.