Wercker configuration for Ruby 2.0, Rails 4.0, Rspec, Postgres stack with deployment to Heroku and Hipchat notifications.

wercker.yml

box: wercker/ubuntu12.04-ruby2.0.0
services:
  - wercker/postgresql
build:
  steps:
    - bundle-install
    - rails-database-yml
    - script:
        name: db:setup
        code: bundle exec rake db:setup
    - script:
        name: echo ruby information
        code: |
          echo "ruby version $(ruby --version) running"
          echo "from location $(which ruby)"
          echo -p "gem list: $(gem list)"
    - script:
        name: rspec
        code: bundle exec rspec
  after-steps:
    - hipchat-notify:
        token: $HIPCHAT_TOKEN
        room-id: 123456
        from-name: wercker
deploy:
  steps:
    - heroku-deploy:
        key-name: WERCKER_HEROKU_KEY
    - script:
        name: migrate database
        code: heroku run rake db:migrate --app $WERCKER_HEROKU_DEPLOY_APP_NAME
  after-steps:
    - hipchat-notify:
        token: $HIPCHAT_TOKEN
        room-id: 123456
        from-name: wercker

Hopefully this will save someone some effort.

• $WERCKER_HEROKU_KEY: needs to exist as an environment variable in a deploy target that points to an ssh-key (in Wercker's web interface). Make sure that key is added to your heroku account.
• $HIPCHAT_TOKEN: needs to be an environment variable for your application (also in Wercker's web interface). Also, you'll need to figure out your own room-id.
• $WERCKER_HEROKU_DEPLOY_APP_NAME: You shouldn't need to set this, this is configured by the heroku-deploy step.