[Too]

> Are Turing-complete languages a bad choice for pipelines?

Yes and no. If you write “steps” in yaml, you are doing it wrong and might as well be using a Turing complete imperative language.

On the other hand, linear steps isn’t always the best to begin with for a pipeline. Better have a dependency tree such as makefiles but more advanced, that the CI engine can execute in the most optimal order by itself and retry failing steps without restarting from the beginning. Just keep the number of transitions between declarative and Turing complete few, nobody likes templating strings to inject data into a small script.