If you’re into this kind of thing, and you’d like to hack on Wafelijzer, please do!

Fork the project repository, make and commit your changes, and submit a pull request if you make anything cool.

Wafelijzer is built with Ruby, using the Padrino framework. It uses Slim and Sass for templating. It uses Sequel to connect to a PostgreSQL database.



Wafelijzer uses memcached for caching.

Install it using Homebrew


Wafelijzer uses ruby version 1.9.3, hosted by version 1.7.9 of the jruby engine.

You’ll probably want to use rbenv to handle installng jruby. You can install it using homebrew.

Run bundle install from the wafelijzer root folder to install all the dependencies, which are listed in the Gemfile


First, you’ll need postgres running. If you’re on a mac, install

Start from scratch with a local postgres database

from the wafelijzer root folder:

bundle exec padrino rake sq:migrate:auto

Reference a remote postgres database

Pull remote database to local PostgreSQL

From the wafelijzer root folder:

heroku pg:pull DATABASE_URL wafelijzer_development
Push local database to remote PostgreSQL

from the wafelijzer root folder:

heroku pg:reset
heroku pg:push wafelijzer_development DATABASE_URL

Front-End Assets

The front-end assets are compiled and minified from the app/assets folder.

Compiling Assets

compiling the assets requires Grunt, a javascript task runner.

First, install node.js. You can also install it using Homebrew.

Then run npm install -g grunt-cli to install grunt.

Then, run npm install from wafelijzer/grunt to install the build dependencies.

Finally, run grunt as needed to compile, or grunt watch to automatically build when the assets are changed.