Jenkinsfile pipeline closure

Jenkinsfile-pimpMyStage.groovy

pimpMyStage('build') { stage ->
    echo "Body of stage ${stage}"
}

def pimpMyStage(name,Closure body) {
    node(name) {
        stage name
        timestamps {
            colours {
                keys {
                    sh "printf \"\\e[31mStage ${name}\\e[0m\\n\""
                    body(name)
                }
            }
        }
    }
}

def colours(Closure body) {
    wrap([$class: 'AnsiColorBuildWrapper', 'colorMapName': 'XTerm']) {            
        body()
    }
}

def keys(Closure body) {
  sshagent([env.JENKINS_GIT_USER]) {
      body()
  }
}