I'm wondering how to avoid a REPL gotcha related to instrumentation. Since stest/instrument wraps existing functions you effectively lose instrumentation by redefining a function with defn at the REPL.

Re-running stest/instrument fixes this but would be annoying to do manually every time.

How do you avoid losing instrumentation at the REPL?

@olivergeorge define a defn+instrument macro?

An instrumenting version of defn would be perfect but ideally it'd be seamless.

what tooling are you using? I'm often editing the files and running the tools.namespace refresh function, which means I can either have the call to instrument at the bottom of a given namespace, or else use the callback hooks in refresh

related, what's the purpose of instrumentation? just for running tests, or for interactive development?

Interactive development. Just starting on a re-natal mobile companion app to a clojurescript re-frame app.

Figwheel has an "always reload" option for namespaces but a simple cursive repl is the case I was considering.

I had the idea of monkeypatching defn, but I dunno how to accomplish that exactly in cljs

(alter-var-root #'defn
 (fn [orig]
  (fn [& args]
   (let [form (apply orig args)]
    `(do ~form (st/instrument '~(ffirst (drop 2 args))))))))

as long as it only runs in dev mode then it's not the worst thing in the world 🙂

Thanks I'll give that a try

I might be able to do something similar via a custom command in cursive. Looks like I can send something like this to the repl with a hotkey (untested):

~top-level-form
(instrument ~current-var)

Another approach would be using a patched version of clojurescript for development. (Must try and see how hard that is now that deps.edn does github shas)