How do i replace string in yaml file in groovy?

Question

samle jules.yaml file:

sealId: 222222
node: java-11 && maven-3 
baseVersion: 1.0.0
aws:
  endpointType: codedeploy
  appspec: 
mapping:
  - name: master
    awsDeployment:
      - env: dev
        accountId: '122121212'
        regions:
          - region: us-east-1
            codedeploy:
              - application: cdp-agent-codedeploy
                deploymentGroup: cdp-agent-codedeploy-gp

I need to replace application and deployment group with different value. I tried like below but no luck

my Jenkins file code:

julesnew = readYaml file: "jules.yml"
       
          julesnew.mapping[0].awsDeployment.env[0].regions[0].codedeploy.deploymentGroup ="new-deploymentgroup"

writeYaml file: 'juels-new.yaml', data: julesnew
          sh "cat juels-new.yaml"

Please guide me.

Answer 1

Your procedure is correct, but you need to properly navigate the original YAML structure . I think you need

julesnew.mapping[0].awsDeployment[0].regions[0].codedeploy[0].deploymentGroup = "new-deploymentgroup"