Maybe this could be a useful addition to bb.process. Like a little utility that takes multiple shell invocations and waits for them to exit or kills remaining ones when one exits.

You can do this with babashka.process/process + babashka.process/check

$ bb -e "(require '[babashka.process :as p]) (defn sleep [] (p/process {:inherit true} \"bash -c 'sleep 1; echo done'\")) (def p1 (sleep)) (def p2 (sleep)) (p/check p1) (p/check p2) nil"
done
done

thanks, that is pretty close but lets say p2 terminates with non-zero exit code, p1 would still keep running. Ideally I'd want to run multiple processes and just kill all of them if one fails. looking at the bb.process docs maybe the promesa integration could be used to make this work

That's exactly how I did it in babashka tasks, only there I used core.async. Could have used a more manual solution as well. There's also a callback you can use whenever a process is finished and using this callback you could fulfill a (promise) in case of an error and then kill all other processes

:exit-fn

Yes, each task map can have :extra-deps

Oh for sure, how could I have missed that in the book???

Not enough caffeine

Thank you

no problem :)