Jenkins job upgrades

1. If you need to make changes to some of the Jenkins jobs, do not directly make changes to the pre-configured jobs. Always create a job using the old job as template and make the custom changes.
2. Whenever a new configuration change is release by sunbird for a particular release, it is mandatory that you update your Jenkins jobs with the new updated configuration provided in the release.
3. By not updating the jobs conflagration, the job may fail if there are some under the hood changes to Jenkinsfile, shared libraries or Jenkins parameters.
4. As part of the upgrade, the existing jobs which sunbird provides (not custom ones which you have created) are overwritten with new content.
5. Before upgrading, always take a backup of your existing conflagration using thin backup in Jenkins.
6. Once you are ready to upgrade, follow the below set of steps.

7. If there is no change in the folders or environments which you did in the first run, then you can just run the jenkins-jobs-setup.sh script

8. If there are changes in environment and you require additional folders for other environments, then update the envOrder.txt file with new environment order and run the script.
9. The script will show the list if differences between your current configuration and new configuration. Take a deep look at these changes and when you are ready to update, provide the confirmation as YES.
10. The script will overwrite the existing jobs (only those sunbird provides by default) and update the configurations with new changes of that release.
11. Restart your Jenkins and you are ready to go.
12. You can take a look at whats changed in existing job and accordingly update the custom job manually so that the same changes are available in the custom jobs.