does ClojureScript 1.8.x support direct linking from Clojure 1.8 when compiling to JavaScript ? Is it enabled by default or is it a compiler option ?

Direct linking is a compiler option in general, so I imagine it would be the same for running the CLJS compiler

https://github.com/clojure/clojure-site/pull/60

https://github.com/technomancy/leiningen/blob/master/doc/TUTORIAL.md#setting-jvm-options

@danielcompton: thanks.

Does anyone have any thoughts on this core.logic problem: http://stackoverflow.com/questions/36659440/using-core-logic-to-make-a-simple-matching-function/36667866#36667866 ?

Anyone have a real clojurescript project I can look at?

Hopefully using boot and multiple cljs files and clj files and html files etc

@urbanslug: are you trying to figure out how to setup your project?

@martinklepsch: No, there’s an existing project that I want to work with certain cljs features such as a repl and reload in the browser

However, this requires a main cljs file and a main html file

Which I lack I want to see how I would go about in adding this to an existing project that lacks them.

@urbanslug: For boot you could check out these articles: https://github.com/bhauman/lein-figwheel/issues/174 https://adambard.com/blog/i-finally-get-boot/ . I haven’t tried boot yet, but it will depend on whether you want to use figwheel, or the more boot-ish boot-reload. Here’s a sample https://github.com/adzerk-oss/boot-cljs-example (warning: i did not pull and try it, it just looked like a repo for almost exactly what you want).

@urbanslug: I made this template which sets up repl + reloading for you https://github.com/martinklepsch/tenzing — maybe it helps to look at the output of the template as if it's an existing project.

is the figwheel lein template outdated? i noticed it generates project.clj with really old clojurescript version

and it includes core.async like this:

[org.clojure/core.async "0.2.374"
:exclusions [org.clojure/tools.reader]]

why the exclusion of tools.reader?

looks like there was a dependency problem: https://github.com/bhauman/figwheel-template/commit/fa8326ad7cc317c216b194b70833f6d1daf5304f . Unfortunately there isn’t any information along with the commit =/.

looks like it might just be for om

if i remove the exclusions it still works

though i am only mucking around with a hello world type app

yeah, i though its only for om too

i’m using reagent

I think the thing at the end is some kind of lein dependency conditional

thats not a really old clojurescript version

actually when i ran the template it created it with an 0.x version of cljs

its still up to date are you running into problems?

i bumped clojure and clojurescript to 1.8 and it seems to work fine

what command did you run to create the project?

let me dig through bash history

hope i can find it

@bojan.matic: yeah thats wrong, you may have a locally installed figwheel template that is really old

@bojan.matic: Chestnut is a figwheel-based template with a reagent option that’s pretty up-to-date https://github.com/plexus/chestnut

lein new figwheel hello should work just fune

this is the command i ran lein new figwheel maxi-clj -- —reagent

so look into your maven repository and delete figwheel-template

and try again

something is wack

@bhauman: Is that "{{#om?}}” at the end a leiningen reader conditional? I’m having a little difficulty googling for it

@banashark: that is a lein template conditional tag

i’m sorry, how do i look into maven repository? i’m new to the whole jvm thing

Thanks

are you on osx?

yes

~/.m2/repository

not sure what i should find in there

bojanmatic at Bojans-MacBook-Pro in ~/.m2/repository/lein-figwheel/lein-figwheel
> ls
0.2.3-SNAPSHOT/ 0.5.0-6/        0.5.2/

delete figwheel-template

delete ~/.m2/repository/figwheel-template

i don’t have that folder

OK ...

> ls | grep figw
figwheel/
figwheel-sidecar/
lein-figwheel/

well something is up... run lein new figwheel hello and show me the project.clj

oh wait, i’m so sorry

exactly ...

it was generating it with 1.7.228

i guess at first i misread it before changing to 1.8

@bhauman: thanks for the help, and thank you for making figwheel

no worries, its working right?

its working awesome

How is the boot / cljs experience these days?

I’m happy to stick with lein, but just curious if boot is worth a look

@erichmond: Using boot for everything, it rules!

@erichmond: if you just want to get a feel try tenzing https://github.com/martinklepsch/tenzing :)

@erichmond my experience: boot is totally rad. making new things that work with boot is definitely easier than making new things that work with lein, but the fact that a lot of libraries/plugins/whatever assume you’re using lein introduces some challenge

is there a reason there is no readline functionality in figwheel repl or is my terminal or something broken? I’m using iterm2 on os x

for example, with cljs in lein, there’s a lot of consensus around figwheel and it’s easy to discover and set up

with boot, boot-reload works too but there are fewer arrows pointing at it

@bojan.matic are you using rlwrap?

yes

then I got nothin 😕

i’m stupid, i thought having rlwrap installed made it magically work, starting the repl with rlwrap lein fighwheel solves it

thanks!

thanks @amonks @martinklepsch

no problem! @bojan.matic @erichmond

I just wrote a library, how do people usually generate an api from the source code (public functions w/comments)?

@iwankaramazow: https://github.com/weavejester/codox << work for you?

@bvulpes: should work for me, thanks!

yw

@martinklepsch: Hmmm that uses lein

I guess you have another project somewhere in there I could look for.

Heh I’m in a weird situation in which I suspect boot is unable to compile/find my cljs files but can’t find my clj files.

@urbanslug tenzing is a lein template for a boot based project

uses lein to bootstrap a boot project

my build.boot uses :source-paths #{"sass" "src/cljs" "src/cljc” “src/clj”}

and then source files are in src/clj/<namespace>/core.clj

or whatever

you can’t use eval in clojurescript?

@amonks: @urbanslug you can even use boot-new to generate the project yet but I've been to lazy to update the readme

ooh cool

@bojan.matic you can in bootstrapped clojurescript

see https://github.com/clojure/clojurescript/wiki/Bootstrapping-the-Compiler

is not the figwheel repl bootstrapped?

cljs.user=> (eval '(+ 1 2))
WARNING: Use of undeclared Var cljs.user/eval at line 1 <cljs repl>
#object[TypeError TypeError: Cannot read property 'call' of undefined]

while on the topic, is being self-hosted required for a language to have eval capabilities? how does CPython have eval and exec without being self-hosted?

@bojan.matic: not necessary to be self-hosted to have eval

@dnolen: so why does only bootstrapped clojurescript have eval?

> ClojureScript can now compile both its analyzer & compiler w/o errors. Can eval non-trivial ClojureScript exprs from within the JS host.

i know i’m lacking in cs background, where can i read more about this stuff?

@bojan.matic: because it meant writing less code - just re-using the compiler that we already have

most Lisp books cover interpretation

oh, ok - thanks!

Structure & Interpretation of Computer Programs, Essentials of Programming Languages, Lisp in Small Pieces, Little Schemer all have toy and less toy interpreters

for Lisp the jump from interpretation to compilation isn’t a particularly big one

@dnolen: thanks!

Q. for all of you fine CLJS folks: when compiling a ClojureScript app, is it possible to target specific JS compilers to potentially avoid the need to include Google’s Closure lib?

Ex. case would be writing a CLJS app on top of Electron or some other compiler-specific app framework.

@rain_omen: gclosure and electron are not mutually exclusive, you can make it work together

@darwin: for sure. And I have. I’m mostly just wondering if the overhead is necessary.

CLJS runtime is built on top of google closure library, and the compiler generates code for it, IMO there is no chance to easily remove that dependency

for example google closure modules (dependency system) is what cljs uses

Ah, yeah. Did not consider that detail.

not sure what do you mean by “overhead”

Ultimately not a huge deal. Asking mostly as a curiosity at this point. “overhead” was perhaps too strong of a word choice in my last message there.

I think “script size” was more what was floating in my head. Then again, for something that’s a distributed as a “native” app, that wouldn’t be much of an issue either.

sure, people usually don’t bother to use advanced optimization when targeting nodejs and similar

if you made the effort, dead code elimination and namespace flattening done by google closure compiler should give you good results

(under advanced optimizations)

:thumbsup: thanks for the tips @darwin

i'm having an issue with including google analytics tracking script if it is loaded after my clojurescript code. basically it tries to call a.handleEvent(b) where 'a' is an anonymous function in closure's google events.js after completing an ajax request using cljs-ajax's ajax.core/GET. i'm not really able to tell much more from the minified code, and this is only in safari and firefox with advanced compilation. i can fix this by not calling my tracking script async but i'm wondering why this is happening?