如何使用管道实用程序步骤插件更新现有yaml文件的内容

Question

在我的jenkins管道中，我正在使用管道实用步骤插件读取yaml文件中存储的数据。

我可以从文件中读取数据，现在我想更新该值并将其写回文件，如下所示：

pipeline {
agent any

stages {

    stage('JOb B ....'){
        steps{
            script{
               def datas = readYaml file:"${WORKSPACE}/Version.yml"
               echo datas.MAJOR_VERSION //output is 111

               datas = ['MAJOR_VERSION': '222']
               writeYaml file:"${WORKSPACE}/Version.yml", data: datas
            }
        }//steps
    }//stage

}//stages

}//pipeline

但是我遇到了错误-- Version.yml已经存在了：

java.nio.file.FileAlreadyExistsException: /var/lib/jenkins/workspace/t-cicd-swarm-example_hdxts-job-B/Version.yml already exist.
at org.jenkinsci.plugins.pipeline.utility.steps.conf.WriteYamlStep$Execution.run(WriteYamlStep.java:175)
at org.jenkinsci.plugins.pipeline.utility.steps.conf.WriteYamlStep$Execution.run(WriteYamlStep.java:159)
at org.jenkinsci.plugins.workflow.steps.SynchronousNonBlockingStepExecution.lambda$start$0(SynchronousNonBlockingStepExecution.java:47)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE

它似乎只能写一个新的文件，不能覆盖现有的文件。如何从上面显示的脚本中更新现有yaml文件的内容？

Answer 1

看起来您需要在覆盖原始文件之前删除或重命名它，因为writeYaml方法没有覆盖标志。

sh '''
  if [ -e Version.yaml ]; then
    rm -f Version.yaml
  fi
'''

Answer 2

根据最新的文件。有一个参数可以用来覆盖指定文件的内容：

writeYaml: Write a yaml from an object.
...
overwrite (optional): Allow existing files to be overwritten. Defaults to false.

请参阅：https://www.jenkins.io/doc/pipeline/steps/pipeline-utility-steps/#writeyaml-write-a-yaml-from-an-object