A Chestnut for experimenting with clojurescript, Processing, and Om. It includes a Clojurescript wrapper for Processing.js (libre.sketch) and basic sketchbook functionality (libre.sketchbook)
For info on Processing.js: http://processingjs.org/
This is a Chestnut project, so it supports automatic browser updating, live cljs evaluation via a browser REPL, as well as deployment to Heroku.
Some example sketches can be found in
src/cljs/libre/sketches/color-walk.cljs
Start a REPL (in a terminal: lein repl
, or from Emacs: open a
clj/cljs file in the project, then do M-x cider-jack-in
. Make sure
CIDER is up to date).
**Emacs Users: be sure you are running the latest CIDER and clojure-mode from the MELPA archive. Also ensure you have the lastest cider-nrepl lein plugin (0.8.0-snapshot is known to work) **
In the REPL do
(run)
(browser-repl)
The call to (run)
does two things, it starts the webserver at port
10555, and also the Figwheel server which takes care of live reloading
ClojureScript code and CSS. Give them some time to start.
Running (browser-repl)
starts the Weasel REPL server, and drops you
into a ClojureScript REPL. Evaluating expressions here will only work
once you've loaded the page, so the browser can connect to Weasel.
When you see the line Successfully compiled "resources/public/app.js" in 21.36 seconds.
, you're ready to go. Browse to
http://localhost:10555
and enjoy.
Attention: It is not longer needed to run lein fighwheel
separately. This is now taken care of behind the scenes
If all is well you now have a browser window with a Processing sketch
running in it, and a REPL prompt that looks like cljs.user=>
.
In the REPL, type
(ns libre.core)
(swap! app-state assoc :sketch-name "random-circles")
Notice again how the browser updates and now shows a different sketch.
This assumes you have a
Heroku account, have installed the
Heroku toolbelt, and have done a
heroku login
before.
git init
git add -A
git commit
heroku create
git push heroku master:master
heroku open
Heroku uses Foreman to run your
app, which uses the Procfile
in your repository to figure out which
server command to run. Heroku also compiles and runs your code with a
Leiningen "production" profile, instead of "dev". To locally simulate
what Heroku does you can do:
lein with-profile -dev,+production uberjar && foreman start
Now your app is running at http://localhost:5000 in production mode.
Copyright © 2014 Craig Brozefsky
Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.