This Groovy code snippet performs the following tasks: 1. **Retrieve `releaseNotes`...

This Groovy code snippet performs the following tasks:

1. Retrieve releaseNotes Value:
   The variable releaseNotes is assigned the value of config.releaseNotes if it exists or is not null. If config.releaseNotes is null or empty, releaseNotes is assigned an empty string "".
   This part uses the Groovy safe navigation operator ?:, which checks for a null or empty value and provides a default in such situations.

2. Set config.skipQA:
   It checks whether the releaseNotes string contains the specific text "--non-qa-hotfix". If the phrase is found, the contains() method returns true, and config.skipQA is set to true. If the phrase is not found, config.skipQA is set to false.

Summary:

This code checks whether the release notes (config.releaseNotes) mention "--non-qa-hotfix" and sets the skipQA flag (config.skipQA) accordingly. If --non-qa-hotfix is present, QA is skipped; otherwise, QA is not skipped.