Jenkins Pipeline: read a file and write a file - readFile, writeFile

In the following Jenkinsfile we have two stages. In the first stage we create a variable called data that holds some text and the we use the writeFile function to write it out to a file. Then we execute ls as an external program using sh.

In the second stage we use the readFile function to read in the content of the file.

examples/jenkins/readfile-writefile.txt

pipeline {
   agent { label 'master' }
   stages {
       stage('write') {
           steps {
               script {
                   def date = new Date()
                   def data = "Hello World\nSecond line\n" + date
                   writeFile(file: 'zorg.txt', text: data)
                   sh "ls -l"
               }
           }
       }
       stage('read') {
           steps {
               script {
                   def data = readFile(file: 'zorg.txt')
                   println(data)
               }
           }
       }
   }
}