How to invoke a jenkins pipeline A in another jenkins pipeline B

A little unclear if you want to invoke another pipeline script or job, so I answer both:

Pipeline scriptThe "load" step will execute the other pipeline script. If you have both scripts in the same directory, you can load it like this:

def pipelineA = load "pipeline_A.groovy"pipelineA.someMethod()

Other script (pipeline_a.groovy):

def someMethod() {    //do something}return this

Pipeline job

If you are talking about executing another pipeline job, the "build job" step can accomplish this:

build job: '<Project name>', propagate: true, wait: true

propagate: Propagate errors

wait: Wait for completion

If you have paramters on the job, you can add them like this:

build job: '<Project name>', parameters: [[$class: 'StringParameterValue', name: 'param1', value: 'test_param']]

Following solution works for me:

pipeline {    agent    {        node {                label 'master'                customWorkspace "${env.JobPath}"              }    }    stages     {        stage('Start') {            steps {                sh 'ls'            }        }        stage ('Invoke_pipeline') {            steps {                build job: 'pipeline1', parameters: [                string(name: 'param1', value: "value1")                ]            }        }        stage('End') {            steps {                sh 'ls'            }        }    }}

Adding link of the official documentation of "Pipeline: Build Step" here:https://jenkins.io/doc/pipeline/steps/pipeline-build-step/

To add to what @matias-snellingen said. If you have multiple functions, the return this should be under the function that will be called in the main pipeline script. For example in :

def someMethod() {   helperMethod1()    helperMethod2()} return this def helperMethod1(){    //do stuff} def helperMethod2(){  //do stuff}

The someMethod() is the one that will be called in the main pipeline script