I wonder if anyone uses more than just reflect/reflect. Upvote this message if you're only using reflect/reflect , specify others in thread below

Is the answer "I don't use it at all" useful?

Sure, let's upvote your answer if other aren't using it either :)

I use reflect (datafy also uses it for classes)

@U23DRD8FN "and what functions from that namespace you use"?

I mean just reflect function itself

@U0P0TMEFJ what did you mean with the ?

please be explicit about what functions exactly you are using if more than just reflect

I meant to upvote only reflect/reflect

👍

https://grep.app/search?q=reflect/&filter[lang][0]=Clojure looks like mostly just reflect/reflect, though there is at least one use of reflect/typename

no

Put it in a dev folder and use an alias when starting a REPL that has :extra-paths ["dev"]

it's actually an issue with running the tests with -M:dev:test:runner (where :dev has "dev", :test adds "tests", and :runner has the main-opts). i have some both dev and test related functions in the dev directory, but it seems one of my dev dependencies doesn't compile correctly, so I'm struggling to use :gen-class in my main namespace. an annoying situation to be in lol

or, just don't ever use user.clj :)

i'm also considering that too

I recommend a dev.clj instead of the usual user.clj, which can easily be used from the repl, but which must manually be invoked to resolve this exact issue.

^^

that's clever, thanks

If loading it takes a long while too then you can throw a (println (char 7)) in there as well right at the end of the file so that you get a bel character printed, and if you've got your terminal or editor configured to notify on bel, then it can help get your attention too.

My issue is just a combination of requiring a dev library that can't be compiled, with :gen-class in my main namespace

We also use dev.clj at work dev/src/dev.clj - solves a lot of user.clj issues 🙂

I don't think you really understand the issue you are having, because I would be really surprised if the :gen-class directive in an ns form had anything to do with it

🤷 maybe not. if i remove (:gen-class) from the main namespace (the namespace with -main in it), then everything works. if I remove the specific libraries from the :require block in my user.clj file, then everything works. if i have both, then running clojure -M:dev:test:runner fails with ClassNotFoundException pointing at the main namespace

The issue is likely to be actually something like your user.clj is loading some library before clojure.core/compile is called causing that library to be skipped when doing transitive aot compilation

Ah, yeah, you are loading stuff in user.clj before compilation, and compilation is a side effect of loading, and already loaded stuff doesn't get reloaded, so if it is already loaded it won't be aot compiled

So the other option is don't transitively load stuff from user.clj, use requiring-resolve, etc

thanks for the details, that's helpful to know

user.clj seems to be such a footgun... there are so many "issues" that we see here on Slack with people running into problems like these:slightly_frowning_face:

Part of me wonders if it would be a good idea to have the code that loads the user namespace file print a warning if it finds the file before it actually loads it.

Well, the people who run into trouble expect it to be loaded so I don't think that would help.

The problems aside from what they put in user.clj

it is strange to me that it's loaded first, but I guess it must be, otherwise, how would it be inserted into the chosen namespace?

No, like a warning saying "loading a user.clj is a dangerous operation. It may cause your repl to fail to start if issues exist elsewhere. It is recommended you migrate to a namespace which is not automatically loaded."