Do macros not work w/ figwheel REPL? getting weird errors

They seem to work fine when required from e.g. core.async, but my user-defined macros aren't working right

@jaredly: are your macros defined in a .clj file?

nope

just in-line w/ the other cljs

that's not going to work

almost sure about it

but @dnolen is replying so I yield

😄

Yes ClojureScript are not like Clojure macros

This is pretty well documented

I wasn't sure if they'd been brought up to speed -- there weren't any errors

It's also why ClojureScript starts at 20k gzipped and not 300k gzipped

It's never going to change

+1 cool

a very nice related blog post is -> http://blog.fikesfarm.com/posts/2015-09-07-messing-with-macros-at-the-repl.html

is there any use in keeping defmacro around in cljs then? it's a big red herring

It doesn't exist really - but a minor bug that it doesn't error out. As usual patches most welcome!

oh did not know that 😉

@jaredly: When you write macros for bootstrapped ClojureScript, even though they are written in namespaces required from the consuming namespaces, all namespaces are compiled as ClojureScript. Thus defmacro must exist in ClojureScript.

@mfikes: ah intersting. looks like it's a macro itself 😄

Perhaps it could be made to error out at the REPL, which is what I think David's suggesting.

yeah. or if it's in a .cljs file?

I’m seeing an error using core.async/map. Here’s a minimal example to reproduce:

async/map takes a collection of source channels, not just the one.

(async/map inc ch)

to

(async/map inc [ch])

oh, the signature is a bit different from clojure.core/map, I expected it to be the same

okay then

let’s see

Hello, I am having problem with externs for google-maps. I use cljsjs package as described here https://github.com/cljsjs/packages/wiki/Using-Packages with both dependency and require in my core namespace. When running lein cljsbuild I am getting No such namespace: cljsjs.google-maps

it worked! thanks @d-t-w

What am I doing wrong please?

Without the require in the core, names get mangled and app does not work at all.

So I found the answer. I was using .setLabel on Marker instance which is not in the google-maps cljsjs package. And indeed the require is not needed.

Hi guys

Little question. I have a clojurescript project licensed under GPL

I'm wondering what would happen if a third party is integrating the compiled cljs binary into a closed source project

Does GPL in this case force the project to be open sourced and adopt GPL?

Not very good with licenses here.

GPL only requires you to provide source to the users

regarding integration - I assume you mean a node.js project?

it's a editor plugin

don't really now how the linking clause applies to this environment, but I'd expect the GPL lib would "poison"/"bless" the rest of the project

in that case would re-licensing under LGPL change that?

Is it possible to have a main entry point a la java? So that I don’t have to bootstrap my app by relying on the side-effects of requiring a namespace?

Maybe I should just wrap the app bootstrapping code in a (defn main []) and do <script>myapp.core.main()</script> from the html-file?

@grav: in boot-cljs there is an init-fn thing which is similar to :main

hello! I'm jacked to clojurescript with cider and trying to eval (println (GET "")) gives me this org.mozilla.javascript.EcmaError: ReferenceError: "XMLHttpRequest" is not defined. (rhino.clj#41)

it makes the ajax request fine in the browser, but i'm trying to use the repl to explore what it's returning

@naomarik: all JS environments are different, if the constructor is not actually in the language specification you cannot expect such things to work.

Has anyone here used cljsjs.showdown with a custom extension defined in ClojureScript yet?

It expects a JS function that returns an array of objects, each with a .lang, .regex and .replace member. Those members are a string, a JS regular expressions and a JS function, respectively.

Can I just define all this as if I was writing for ClojureScript and then wrap it in (clj->js my-extension-function) or do I need to do more?

This is what I have so far: https://gist.github.com/Jannis/70b1aa5cfb47bacf08f1

@jannis in general I do not recommend clj->js

it’s a convenience but nothing I would ever use for critical interop

we have JS literal support and JS helpers via Google Closure for a reason

@dnolen: What do you mean by "JS helpers"?

you have an entire library (Google Closure) for dealing with JS objects and JS arrays

if you’re dealing with an API just leverage this stuff

clj->js is just convenience - it performs terribly and has many corner cases

Ok. I'm making a bit of progress by creating JS arrays and objects with #js and passing those to Showdown. Still throwing errors but this time it's about creating JS regexps from other regexps. Should be able to solve that.

Ah. The cljsjs version of Showdown takes a pattern string, not a regexp. Done. Working. Sweet.

@dnolen: what's your opinion on reagent?

@naomarik: seems cool and a lot of people use it!

never used it myself so I don’t have an opinion

i haven't found much in the way of comparison between the two, you have anything to suggest in regards to that?

btw my experience - i've just picked up clojure 3-4 days ago

a bit overwhelmed with all the options and terminology

@naomarik: I would recommend trying both

Reagent is probably easier to get started with

yeah i'm playing with reagent atm from luminus

do most people there at cognitect use emacs or cursive?

Om Next is now more of a complete UI framework than most other things

@naomarik: a mix really

Om Next is here https://github.com/omcljs/om right?

i keep seeing reference to this but no specific Om Next repo

yes it’s just a new namespaces(s)

https://github.com/omcljs/om/blob/master/src/main/om/next.clj https://github.com/omcljs/om/tree/master/src/main/om/next

cool

for your convenience 😉

thanks 😉

I'm trying to figure out how to make the sente post fallback actually run - do I have to do something special in the frontend code?

I wrapped the post-fn in a middleware and have verified that even with the get handler that sets up the websocket malfunctioning, the post handler isn't getting hit

is there a blog post or tutorial for getting started with closure modules from a cljs perspective?

ah, duh: http://swannodette.github.io/2015/02/23/hello-google-closure-modules/

@noisesmith: I think you can choose what you want to connect on

https://github.com/ptaoussanis/sente#on-the-client-clojurescript-side

:type keyword in options

@jaen: so this means I need to do the fallback manually from my cljs?

Not exactly, it means you have to fallback manually if you want to test it.

It will fallback automatically if browser doesn't support or can't connect through WS

I'm already using :type :auto

and I modified my ws handler to fail, the post endpoint isn't even getting hit

um. sorry if the question is not very smart, but what is the newest example on how to use figwheel and connect from vim to browser page via nrepl? (I use vim-fireplace)

I tried to do om.next tutorial, and picked figwheel (now it's figwheel-sidecar) from there, and it's obviously connected to browser page

i'm currently stuck trying to do this with cider/emacs

I'm not sure what exactly does piggieback do, and what austin/weasel do

I just use figwheel in a regular terminal window, since it is mostly there for the hot-reloads anyway

yeah

one year ago I managed to do setup correctly, but I just picked chestnut example

problem is - I see that figwheel is definitely talking to browser page window

because of js/alert being available

right

when I install nrepl-port option into figwheel-sidecar config, it starts nrepl (as written on figwheel window)

but when my vim-fireplace connects there, it launches well rhino environment

I totally don't get it on how many moving parts are there and what would be the fresh example..