:pre-start-fn in babashka.process/process maybe?

you can do something like this:

(alter-var-root #'babashka.process/*defaults* assoc :pre-start-fn println)

This is probably even better:

(alter-var-root #'babashka.process/*defaults* assoc :pre-start-fn #(apply println ">" (:cmd %)))

hmmm, where do I put that if I'm running the task via bb run some:task ?

e.g. in :init inside of :tasks

in bb.edn right?

Yeah, but in this case, you can't use #' and #(..) so you have to write:

(alter-var-root (var babashka.process/*defaults*) assoc :pre-start-fn (fn [m] (apply println ">" (:cmd m))))

found some docs for :init https://book.babashka.org/#_hooks

finally got it to work. my first time inside a bb.edn file

anyway, seems to work well. should save quite a bit of time

maybe a good idea for a future bb option?

yeah perhaps. one of the issues that it's currently a bit verbose is that not everyone wants to have this logging in the same way as others

nod

Looks like :init isn't run if I use

bb -m my.entrypoint

I was thinking of chaining main calls, like so:

bb -m my.enable-debug -m my.entrypoint

but couldn't see how to make that work given that babshka.main doesn't seem to be available to require

I guess what I'm thinking is that it would be cool to have a way to specify a preload code to run ad-hoc on the cli for debugging or other tooling purposes

There is an env var for this BABASHKA_PRELOADS, see docs. There’s also the —init option

:init only belongs to tasks

Ah, i'll check that out

This works like a charm and adds a touch of color

BABASHKA_PRELOADS='(alter-var-root (var babashka.process/*defaults*) assoc :pre-start-fn (fn [m] (println (str "\u001B[37m\u001B[45m" (pr-str (:cmd m)) "\u001B[0m"))))'