【Jekins pipeline】CurlでChatwok APIのメッセージ送信を使う

pipeline {
  agent any

  stages {
    stage('exec') {

      environment {
        apiKey="xxx"
        roomId="yyy 数字のみ"
        url="https://api.chatwork.com/v2/rooms/${roomId}/messages"
        message="Jenkins Job ${env.JOB_NAME} : ${currentBuild.currentResult}"
      }

      steps {
        sh('curl -X POST -H "X-ChatWorkToken: $apiKey" -d "body=$message" "$url"')
        // bad
        // sh '''
        //   curl -X POST -H "X-ChatWorkToken: $apiKey" -d "body=${message}" "${url}"
        // '''
      }
    }
  }
}