There isn't really anything in the code that suggests that the "mainline" mentioned is automatically deployed to production or deployed to anything at all. The

There isn't really anything in the code that suggests that the "mainline" mentioned is automatically deployed to production or deployed to anything at all. The article mentions CI/CD but that doesn't necessarily mean lights will go out if there are mistakes. It all depends on what happens once code reaches mainline. For a desktop app, you might be a month from any production use of your code, and still use "CI/CD" where the CD is simply a nightly build, for example.