@NonCPS
def setBuildName(manager, currentBuild) {
        def m = manager.getLogMatcher('stage (.*)')
        if (m?.matches()) {
                currentBuild.displayName = m.group(1)
        } else {
                currentBuild.displayName = 'NO MATCH'
        }
}

pipeline {
        agent {
                label "master"
        }
        options {
                // Just here for easy comment/uncomment of timestamp()    
                buildDiscarder(logRotator(numToKeepStr: '5'))
                // timestamps()
        }

        stages {
                stage('checkout') {
                        steps {
                                sh "echo 'stage checkout"
                        }
                }
                
                stage("preparation") {
                        steps {
                                sh "echo 'stage preparation'"
                        }
                }

                stage("install") {
                        steps {
                                script {
                                        setBuildName(manager, currentBuild)
                                }
                        }
                }
        }
}