sci 2022-05-20 | Slack Archive

https://clojars.org/org.babashka/sci.impl.types -> is there a git repo for that somewhere?

Everything that contain .impl in the name should be considered private and may change at any time

Tell me what you need and we can try to make it a public API

timbre logging: how difficult is it to convert a macro like that:

(defmacro info               [& args] `(log! :info   :p ~args ~{:?line (fline &form)}))

borkdude09:05:57

Do something like this:

(defn ^:macro info [&form _ & args]
  `(log! :info   :p ~args ~{:?line (fline &form)}))

(sci/copy-var info tns)

awb9922:05:57

(sci/binding [sci/out *out*] ;; this enables println etc.
     (scia/eval-string* ctx-repl code))

when I do this and I eval "(println 343)" I get this error message: "Attempting to call unbound fn: #'clojure.core/print-fn" It is weird, because I use sci in clojurescript.

borkdude06:05:31

Use sci/alter-var-root. Binding resets the var too early because async

borkdude09:05:56

(sci/alter-var-root sci/print-fn (constantly *print-fn*))

awb9923:05:15

I found a missing feature for async compile: async require. A require can also need to load a module asyncronous. This is helpful if there are reagent functions that vizualise something. And they will be in a lazy loaded module 🙂

Bob B00:05:08

https://github.com/babashka/sci/blob/master/doc/async.md#lazy-loading-a-namespace might be sort of along the lines of what you're looking for

awb9903:05:47

Thanks @U013JFLRFS8 I am using exactly that. But this only does compilation. I need also a require function that is async 🙂

borkdude06:05:15

Yes, I will add require next, issue welcome

borkdude09:05:30

@UCSJVFV35 Here is require: https://github.com/babashka/sci/blob/master/doc/async.md#require

awb9900:05:23

@U04V15CAJ Thank you so much!!

awb9900:05:57

I guess what it means really, is that there is EITHER a async version, OR a sync version.

awb9900:05:14

Or is it still possible to do sync evals, but unter the hood it is using async require?

borkdude05:05:33

Example please

awb9906:05:39

so if I want to load modules via the async loader,

awb9906:05:53

I guess that I have to remove the sync eval from sci

awb9906:05:08

because sync evals will always use the sync require,

awb9906:05:20

and this will not be able to lazy load dependencies.

borkdude06:05:50

Can you please give a full standalone example

borkdude06:05:55

As code

borkdude06:05:58

I think there might be a solution but it depends on your exact example

borkdude06:05:11

GitHub issue welcome

awb9906:05:37

I am trying to understand the implications:

awb9906:05:05

So resolve will only depend on the state of the sci-context. So it means if i just call resolve,

awb9906:05:19

it will NOT give me something that is in a lazy namespace.

awb9906:05:58

So what I will need to do, if I resolve something, then there are situations where I might want to require the namespace of the resolve variable first.

awb9906:05:13

And since that resolve is via a promise, I need to await that promise.

awb9906:05:19

So in other words, it is perfectly fine that resolve is always synchronous,

awb9906:05:31

but depending on the usecase I might have to require (async) first.

awb9906:05:44

I think I got this right now 🙂

awb9906:05:07

But I will have to re-think it again, as it is pretty esential when one uses async compilation and requires.

borkdude07:05:54

resolve always only resolves the namespaces you have already loaded

borkdude07:05:02

that is the same as in Clojure

awb9908:05:25

perfect! then I know how I have to do it! no bugon your side 🙂

2022-05-20

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