A Heroku web app using Compojure.

This generated project has a few basics set up beyond the bare Compojure defaults:

• Cookie-backed session store
• Stack traces when in development
• Environment-based config via environ
• HTTP-based REPL debugging via drawbridge

To start a local web server for development you can either eval the commented out forms at the bottom of web.clj from your editor or launch from the command line:

$ lein run -m slack-lambda.web

Initialize a git repository for your project.

$ git init
$ git add .
$ git commit -m "Initial commit."

You'll need the heroku toolbelt installed to manage the heroku side of your app. Once it's installed, get the app created:

$ heroku apps:create slack-lambda
Creating slack-lambda... done, stack is cedar
http://slack-lambda.herokuapp.com/ | git@heroku.com:slack-lambda.git
Git remote heroku added

You can deploy the skeleton project immediately:

$ git push heroku master
Writing objects: 100% (13/13), 2.87 KiB, done.
Total 13 (delta 0), reused 0 (delta 0)

-----> Heroku receiving push
-----> Clojure app detected
-----> Installing Leiningen
       Downloading: leiningen-2.0.0-preview7-standalone.jar
[...]
-----> Launching... done, v3
       http://slack-lambda.herokuapp.com deployed to Heroku

To git@heroku.com:slack-lambda.git
 * [new branch]      master -> master

It's live! Hit it with curl:

$ curl http://slack-lambda.herokuapp.com
["Hello" :from Heroku]

The cookie-backed session store needs a session secret configured for encryption:

$ heroku config:add SESSION_SECRET=$RANDOM_16_CHARS

The devcenter article has a detailed explanation, but using the repl task from Leiningen 2.x lets you connect a REPL to a remote process over HTTP. The first step is setting up credentials:

$ heroku config:add REPL_USER=[...] REPL_PASSWORD=[...]

Then you can launch the REPL:

$ lein repl :connect http://$REPL_USER:$REPL_PASSWORD@slack-lambda.herokuapp.com/repl

Everything you enter will be evaluated remotely in the running dyno, which can be very useful for debugging or inspecting live data.

Copyright © 2014 FIXME

Distributed under the Eclipse Public License, the same as Clojure.