Start a pipeline from another in Jenkins

Suppose you want to start automatically a Jenkins Pipeline from another.

Besides, suppose you want to pass some variables from the first to the second one.

How can you do it?

Example

You have Pipeline 1 and Pipeline 2, and want to start Pipeline 2 from Pipeline 1

Pipeline 1

def params=[]

pipeline {

    agent any

    stages {

        stage('Start pipeline2') {

            script {

                

                params.add(string(name: "field1", value: "value1")

                params.add(string(name: "field2", value: "value2")

                build(job: "path/to/pipeline2", parameters: params)

            }

}

    }

} 

Pipeline 2

pipeline {

    agent any

    stages {

        stage('Read parameters') {

            script {

                

                for (p in params) {

                    print p.key

                    print p.value

            }

            }

}

    }

}