[thayne]

The problem is that your "ci" script often needs some information from the host system, like what is the target git commit? Is this triggered by a pull request, or a push to a branch? Is it triggered by a release? And if so, what is the version of the release?

IME, much of the complexity in using Github Actions (or Gitlab CI, or Travis) is around communicating that information to scripts or build tools.

That and running different tasks in parallel, and making sure everything you want passes.