When I save changes from emacs, my "state" (like any atoms that get defined) are all reset. But any "running" go-loops seem to multiply. I'm not sure how to avoid this. If I define an "started-up" atom flag to guard against a go-loop getting spun up more than once, my flag gets reset back to false each time I save changes, so I can't prevent multiple go-loops from starting up. How can I enforce having any go-loop only starting up one time, regardless of how many times I hit save in my editor?

What does this error mean in cider-nrepl while connecting with cider-connect-sibling-cljs?

is loading of cljs modules implemented on react-native?

@ahmed1hsn that means the embedded server was not started. see https://shadow-cljs.github.io/docs/UsersGuide.html#embedded

@thheller when embedded server is started I don't need to run npx shadow-cljs watch main? Because I have already running this command in another shell before runnning cider-connect-sibling-cljs.

@yenda as far as I know react-native and/or metro do not support loading code dynamically

@ahmed1hsn if you have shadow-cljs watch running then you do not need the embedded server. you are likely just not connected to the correct shadow-cljs instance

I don't use emacs so I can't help much. don't know how current this is https://shadow-cljs.github.io/docs/UsersGuide.html#cider

How do I find correct shadow-cljs instance?

It's still giving same errors.

@thheller they have introduced inline requires fairly recently

@ahmed1hsn the easiest way is to configure a fixed port for nrepl and connect to that remotely https://shadow-cljs.github.io/docs/UsersGuide.html#nREPL

@yenda hmm it seems to be built directly on require so no cljs :modules would not work for that

@thheller it works.

Are we still not able to disable source map support?

SHADOW import error /Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/app/cljs-runtime/app.server.js
/Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/node_modules/source-map/lib/source-map-consumer.js:539
      throw new TypeError('Line must be greater than or equal to 1, got '
      ^

TypeError: Line must be greater than or equal to 1, got null
    at BasicSourceMapConsumer.SourceMapConsumer_findMapping [as _findMapping] (/Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/node_modules/source-map/lib/source-map-consumer.js:539:13)
    at BasicSourceMapConsumer.SourceMapConsumer_originalPositionFor [as originalPositionFor] (/Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/node_modules/source-map/lib/source-map-consumer.js:604:22)
    at mapSourcePosition (/Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/source-map-support.js:199:42)
    at wrapCallSite (/Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/source-map-support.js:343:20)
    at /Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/source-map-support.js:378:26
    at Array.map (<anonymous>)
    at Function.prepareStackTrace (/Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/source-map-support.js:377:24)
    at process.emit (/Users/matt/.boot/cache/tmp/Users/matt/Projects/cannabit/cannabit-identity/ukm/fyoiyj/node_modules/source-map-support/source-map-support.js:431:52)
    at process._fatalException (internal/process/execution.js:123:25)

I am getting this when I try to use express-session

I don't see shadow-cljs in that stacktrace anywhere?

is it just failing to parse the source map and swallows the actual error?

@thheller that seems likely

anyway to disable source maps?

in release I get Maximum call stack exceeded

well it would help to find out whats wrong. :compiler-options {:source-map false} disables them

Getting that error when trying to use mqtt.js

and the file exists under node_modules >_<

shadow$provide[“module$node_modules$process_nextick_args$index”] = function(global,process,require,module,exports,shadow$shims) { ‘use strict’;

etc

bit perplexed as i had it working with figwheel

had what working? please provide some example code I can run or so

(mqtt/connect (:uri mqtt-opts) (clj->js (:opts mqtt-opts))) is the offending line

and mqtt is required with [“mqtt” :as mqtt]

had it working in another project where i’m using figwheel

logs show it starts to connect and then complains about a missing function in process.nextTick

and for figwheel you used cljsjs?

but it appears that the file providing process is there

yeah

installed mqtt via yarn

for figwheel?

no, for this project

cljsjs for the figwheel project, yarn for this project

well I know why process.nextTick is missing. just need to figure out why its not missing in the cljsjs packages since process.nextTick is usually a node function

and doesn't normally exist in the browser

it appears to be compiled though. is it an issue of ordering? it’s required at a later stage?

hmm yeah the polyfill is included. you can get the same if you just use (:require ["mqtt/dist/mqtt" :as mqtt]) instead

I should probably update the process polyfill that shadow-cljs includes. seems to be a bit dated by now

did the trick

https://github.com/thheller/shadow-cljs/issues/502

how do you track down these errors @thheller? years and years of experience with the npm ecosystem or is there rhyme and reason to it?

https://github.com/thheller/shadow-cljs/blob/master/src/main/shadow/js.js#L36-L74

thats where process comes from in browser builds

so its clear why process.nextTick doesn't exist

but typically JS libs do something and don't use process in browser builds

guess this one doesn't

only having the minimal polyfill because of that

but the polyfill I copied has nextTick support now so I guess that should be added

https://github.com/defunctzombie/node-process/blob/master/browser.js#L134

👍:skin-tone-2: