pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                sh 'echo "sample artifact" > artifact.txt'
            }
        }
        stage('Save user') {
            steps {
                script {
                    def username = currentBuild.getBuildCauses().find { it._class == 'hudson.model.Cause$UserIdCause' }?.userId
                    writeFile file: 'user.txt', text: username
                }
            }
        }
        stage('Archive artifacts') {
            steps {
                archiveArtifacts artifacts: '**/artifact.txt, user.txt'
            }
        }
    }
}