Scripted Pipeline

scripted.groovy

node {
    stage('Build and test') {
        echo 'Building and testing...'
    }
    if (env.BRANCH_NAME == 'master') {
        ['qa', 'prod'].each { environment ->
            stage("Deploy to $environment") {
                echo 'I only execute on the master branch'    
            }
        }
    }
}