Does anyone know of a good way to "sandbox" the loading of namespaces? I'm trying to find a way to load and evaluate a namespace from an external source without interfering with the bindings in my current Clojure process' instance of the same namespace.

@jrsnyder13 Perhaps look at the clojail project?

That will also make it safe to load and run that code (or at least safer) since it's coming from an external source...

Does anyone have an example of deploying a clojure library to clojars from gitlab-ci?

;

Is there any syntax that will help me include a specific key/val in a map depending on clojure/clojurescript target? I know of #?(:clj), but usable inside a map form

I can wrap the whole thing in assoc of course, but still

can you use the splicing reader conditional?

I guess not

could use a cond-> whose test is a reader conditional

(cond-> { … } #?(:clj true :cljs false) (assoc :clj-only :foo))

@alexmiller Thanks, splicing reader was what I was looking for.

did the splicing reader work for you?

and for map

{#?@(:clj [:key :val])}

I’m a little surprised that works but I guess it makes sense

A happy accident?

it wouldn’t surprise me if that gives trouble to other tools with their own lexers

Interesting syntax tho, #?@(...)

as it looks like a map with an odd number of elements until it’s read

would that break edn reading of a file with those forms?

edn doesn’t have reader conditionals

Does anyone know how to configure the built-in MacOS firewall to permanently accept incoming connections? I've added the version of java to the firewall but I'm stick stuck clicking "allow" each time I restart the server.

Is there any way to determine in custom macro whether passed symbol is macro or function?

my test is (:macro (meta (var loop)))

of course this doesn't work here

(defmacro is-macro? [sym]
  (let [m? (:macro (meta (var sym)))]
    `~m?))

is there any way to resolve sym within a macro?

resolve?

(Note that you can't resolve vars in Clojurescript macros.)

it's in Clojure

works! thanks a lot

just for curiosity can you explain why you need to know?

I have math functions and some of them are expressed as macros (java calls) and some of them are clj functions. I want to wrap such macros into functions (and avoid wrapping functions) to generate rest of the code.

so my macro checks symbol and generated function or leave symbol unwrapped

(if (:macro (meta (resolve f))) `(fn [v#] (~f v#)) f)

one possible gotcha is if you get a function literal instead of a symbol bound to an fn

"cannot embed object in bytecode" is the error message IIRC

fortunately I operate on symbols here, it's a private macro and should be ok in my case

got some... fun recursion

Weird request, but working on a perf improvement to something and want to provide a realistic benchmark on public data. Tried randomly generating data, but issue is time is dominated by things that are artifacts of random data you wouldn't see in practice (for instance, all keywords are distinct and very long). I don't want to try to generate "realsitic data since that seems bad and want to know if someone has some large public batch of EDN data laying around that might be 'representative' of real-world data, or even better something someone's used to benchmark before

mbrainz?