Clojurians Log v2

@jmckitrick Where do you get this?

what is the correct way to enable flycheck-mode on .clj files when using cider? Do I need to make this based on the .clj extension, or do I need to make it based on cider mode? Is this a cider thing or an emacs thing?

do I want something like this in my .emacs file? (add-hook 'cider-mode-hook 'flycheck-mode)

I just enable it globally.

https://github.com/bbatsov/emacs.d/blob/master/init.el#L499

interesting, what does that do in non-clojure buffers?

What are the best resources for someone already knowing some Clojure, but wanting to migrate from VSCode to emacs, to learn e.g. CIDER and emacs?

Asking for @stevan.radanovic

Basically one needs to know that M-x is the equivalent to the command palette. 😃 Also, I think the document that @plexus is putting together would be of help. Not sure how ready he is to share it this widely, though so I’ll let him decide that.

I've started a CIDER project using Starting server via /usr/local/bin/clojure -Sdeps '{:deps {nrepl {:mvn/version "0.8.2"} cider/cider-nrepl {:mvn/version "0.25.4"}}}' -A:dev -m nrepl.cmdline --middleware '["cider.nrepl/cider-middleware"]'

That's the output CIDER gives me. It does a bunch of work, but then never returns a working repl.

I see both nrepl and cider-nrepl are injected.

happy to share, not sure how generally useful it is. It is deliberately splitting very fine hairs, which may not be very useful for a user looking for practical info https://docs.google.com/spreadsheets/d/1PjW5Vaz3-DSTx6fkfHVbwVV5J6cfKq3xttwnwgzNS8Q/edit#gid=919814025

It's more intended for people working on tools to be able to compare with prior art

btw I have mapped my paredit keybindings such that they work the same in VSCode/Calva as in emacs/CIDER

I wont claim this is the best, but hopefully its useful. https://practicalli.github.io/spacemacs/

^ @stevan.radanovic :)

@borkdude have you updated the emacs/CIDER bindings or the Calva ones?

Calva ones

Can I haz?

lemme check

If you post it as a gist I can link to it from the Calva docs.

This is one: I'm not sure how to make a gist of this.

There should be a keybindings.json file there on your machine somewhere…

@pez https://gist.github.com/borkdude/6958364c88312713e62f13d8ba2b28e7

So here's where I'm confused... here is the command line I used to start the app:

clj -Sdeps '{:deps {nrepl/nrepl {:mvn/version "0.8.2"} cider/cider-nrepl {:mvn/version "0.25.4"}}}' -M:dev -m nrepl.cmdline --middleware '["cider.nrepl/cider-middleware"]'

Which is right out of CIDER's jack-in setup, with an extra param -M:dev for clj tools config.

You can see that nrepl (also in deps.edn already), cider-nrepl, and cider-middleware are all injected.

However, when I run cider-connect-cljs and provide localhost and the port configured in the dev startup code for nrepl, I get a CIDER repl with this warning:

'WARNING: CIDER requires cider-nrepl to be fully functional. Some features will not be available without it!'

So... what's missing or disconnected?

@jmckitrick What configuration is in the :dev alias? Does it contain :replace-deps ?

no

Does it have its own main?

Ok, I'm in business! Whew. So I had it working yesterday, then a rare git issue lost my changes (uncommitted, unstashed, etc...)

But I'm trying a different approach now...

https://docs.cider.mx/cider/0.26/basics/middleware_setup.html#using-embedded-nrepl-server

I'm not sure it's ideal, and I'd rather handle this in deps.edn and CIDER rather than changing my company's startup code, even though it's only the dev endpoint.

Next is CLJS. It seemed like it was working, but:

`[nREPL] Direct connection to localhost:9630 established [nREPL] Connection closed unexpectedly (connection broken by remote peer)`

So it connects then immediately closes.

I tried creating a macro in a clojurescript project and adding a {:style/indent 1} meta tag and it indents fine if I use the macro in the same buffer but once I import it and use it in a cljs file it indents all arguments when I only want it to indent once. Is there something I'm missing to get the other buffer to pick up the indentation?

I noticed the change once I re-named the macro, if Ihave it start with "def" seems to indent normally without the style indent

i think the rules for indentation can be a bit simplistic but sometimes beneficial. Things that start with def (`defthingy`, etc) use the def rule. Same as functions/macros that start with with. Lots of times you get the intended behavior for free from the more simple matching rules but sometimes it is unintended

right, but shouldn't setting the indentation spec take into effect?

(defmacro withstyles
  {:style/indent 1}
  [styles component]
  (let [bind-forms (style-bindings styles)]
    `(let [~@bind-forms]
       ~component)))

it sounds like there are two rules in conflict. i don't know how or even if there is a conflict resolution strategy

in the same buffer, the macro indents properly, but importing via require works

(withstyles [interact [grow pointer]
             grow [*interact another one]
             a [choice-a]
             b [choice-b]
             conditional [(if (= 1 1) a b)]]
  [:div {:class interact}
   [:div {:class grow}]
   [:div {:class conditional}]])

that's in the clj file

(defn close-button []
  (withstyles [interact [dim pointer]
               position [absolute right-0]
               style [ma2 pa1 w1 h1 f5 ba br-100 b--transparent bg-red]]
              [:div {:class (classes interact position style)
                     :onClick #(unset-state! :dashboard/visible-topic)}]))

this is in a cljs file with the specification

(ns hot-topics.dashboard
  (:require-macros [hot-topics.tachyons :refer [withstyles]])
  ,,,)

do you have a cljs repl open and is the namespace loaded?

yeah

I even eval'd both buffers just in case

then might be a bug with indentation in cljs. maybe open an issue with a minimal repro?

and is this the case only with def and with prefixes? ie if you rename this to foo does it behave correctly?

yeah, I just created a new one with a different name and same problem, interesting

maybe check the documentation if indentation metadata is supported at all for cljs?

seems like (put-clojure-indent 'withstyles 1) does it

yeah that's the static stuff. i'm wondering if the metadata (and therefore nrepl support required) version works at all

it seems to only work in the clj repl, maybe there's a communication issue with the metadata between clj/cljs

I'll try and make a minimal example when I have time and see if it's not already submitted, but you pointed me in the right direction

i would verify in documentation that this is supported at all before trying to diagnose a bug

there are several features that are clj only when it comes to nrepl support. the debugger being an example that quickly comes to mind

true, I see I can't do (meta #'withstyles) in cljs, but in clj it's fine, so maybe that's just a limitation with cljs to find out how to indent forms

oh i filed a bug report that cljs drops some meta from defs like arglists. i wouldn't be surprised if this was similar. if you alter-meta that with-styles after explicitly you could check if that helps

no luck, I think as far as cljs is concerned it just knows the name and hands it off to the compiler to deal with

maybe I'll just have a localdirs with those declarations

I'm curious how it works with macros out in the wild as libs, how do they set it across the board for consumers

Would a pull request be welcome for the issue I raised https://github.com/clojure-emacs/cider/issues/2922

@jr0cket comment left. suggested maybe just a new var that will be used as the whole connection argument if provided

Thanks for the feedback. Wouldn't replacing the whole command line require a lot more changes to the Cider code. I'll take another look and see if I understand that part of the code.

probably not. it ultimately ends up in a single string called cmd and a process is started like that

https://github.com/clojure-emacs/cider/blob/master/cider.el#L1279-L1285 is where the string is built up and here the string is just passed into nrepl-start-server-process https://github.com/clojure-emacs/cider/blob/master/cider.el#L1007-L1011

all you have to do is just not do any work when a string is given