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

Question

I have two Jenkins pipelines, let's say pipeline-A and pipeline-B. I want to invoke pipeline-A in pipeline-B. How can I do this?
(pipeline-A is a subset of pipeline-B. Pipeline-A is responsible for doing some routine stuff which can be reused in pipeline-B)
I have installed Jenkins 2.41 on my machine.

Answer 1

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/

Answer 2

A little unclear if you want to invoke another pipeline script or job, so I answer both:
Pipeline script
The "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']]

Answer 3

As mentioned by #Matias Snellingen and #Céline Aussourd, in the case of launching a multibranch job you have to specify the branch to build like this :
stage ('Invoke_pipeline') {
steps {
build job: 'pipeline1/master', parameters: [
string(name: 'param1', value: "value1")
]
}
}
In my case it solved the problem.

Answer 4

I am going to post my solution, which is similar to #Michael COLL, #Matias Snellingen, and #Céline Aussourd.
For the multibranch pipeline I am using the following code in Jenkinsfile to trigger my multibranch B with multibranch A (in the example there are two cases for pipeline and multibranch pipeline):
post {
always {
echo 'We are in post part and Jenkins build with QA tests is going to be triggered.'
// For triggering Pipeline
//build job: 'WGF-QA WITH ALLURE', parameters: [string(name: 'QA-Automation', value: 'value from Build pipeline')]
// For triggering Multibranch Pipeline
build job: 'Testing QA/QA Selenium Tests/feature%2FGET-585', parameters: [string(name: 'QA-Automation', value: 'value from Build pipeline')]
}
}
Just be sure to define the whole path to the branch as is defined in the case and instead of / in branch name use %2F (feature/GET-585 -> feature%2FGET-585).

Answer 5

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

Answer 6

Another option is to create a package, load it and execute it from the package.
package name.of.package
import groovy.json.*
def myFunc(var1) {
return result
}
Than consume it
#Library('name_of_repo')
import name.of.package.*
utils = new name_of_pipeline()
// here you can invoke
utils.myFunc(var)
hope it helps