Using dependencies from shadow-cljs.edn in embedded mode

[nikonikoniko]

I am trying to use shadow in embedded mode: https://shadow-cljs.github.io/docs/UsersGuide.html#embedded

It successfully can start the server, but on compilation it seems that it expects my dependencies to be listed in deps.edn instead of shadow-cljs.edn. Without adding reagent to deps.edn, I get the following:

clj -M:repls
WARNING: Specified aliases are undeclared and are not being used: [:repls]
Clojure 1.11.1
user=>  (require '[shadow.cljs.devtools.server :as server])

nil
user=> user=> (server/start!)
Apr 13, 2024 7:15:26 AM io.undertow.Undertow start
...
shadow-cljs - server version: 2.28.3 running at http://localhost:9630
shadow-cljs - nREPL server started on port 50130
:shadow.cljs.devtools.server/started
user=> (require '[shadow.cljs.devtools.api :as shadow])
nil
user=> (shadow/compile :frontend)
[:frontend] Compiling ...
The required namespace "reagent.core" is not available, it was required by "sfm/browser/app.cljs".

:error

Adding reagent to deps.edn makes the problem go away. Curiously, the build-id :frontend was defined in shadow-cljs.edn, so there is some connection happening.

Is there any way to specify to get the :dependencies from shadow, too? maybe in the opts for compile?

[thheller]

shadow-cljs in embedded mode runs in the JVM it is embedded in and uses its classpath. It therefore never even checks where your dependencies are defined, since it cannot add anything reliably after the JVM is started.

So, yes the intention is to have all your dependencies in deps.edn if thats how you start your JVM. And no, there is no way to define and use them from shadow-cljs.edn if used in embedded mode. I generally recommend putting them in a :cljs or so alias, to have some sort of separation but that is not super important.

[nikonikoniko]

Thank you kindly. That makes a lot of sense.