Clj / Cljs App

An extraction of our main app at Cognician.

Usage

Clone this repo, run the commands explained below to see it in action, and then use it as a reference to create (or alter) your own app.

It composes the following:

The clojure runtime, and tools.deps.alpha for Clojure dependency management.

An nREPL server for a pure Clojure REPL, with CIDER and clj-refactor middleware included.

Shadow CLJS, which has:

An empty app, with working dev and release builds, and a working ClojureScript REPL.
A Clojure + ClojureScript REPL, via shadow's system, with CIDER and clj-refactor middleware included.
A package.json, for bringing in libraries from npm.
We don't provide an explicit ClojureScript dependency; we simply use the one Shadow CLJS provides.

A Makefile, to encapsulate the various commands that make this all happen.

Clojure and ClojureScript REPL in action

Run make. This will start a shadow-cljs REPL capable of both pure Clojure and Clojure+ClojureScript repl connections from Emacs.

From Emacs, run the M-x cider-connect-clj&cljs command, and select :shadow when prompted.

In a new terminal, run make http. (I assume you have a basic Python installed so you can start this service up!)

Browse to http://localhost:8000/app.html. You should be able to write and evaluate this, and see it happen in your browser:

(js/window.alert "hello from Emacs")

See Makefile for more goodies!

CIDER Clojure Refresh in action

Once your Clojure or Clojure+ClojureScript repl is connected, you can run the M-x cider-ns-refresh to reload your code. The start and stop functions in clj-cljs-app.main give you hooks to handle the lifecycle of your application entrypoint.