Circle CI to run multiple Ruby versions and Platforms

circle.yml

machine:
  ruby:
    version: jruby-1.7.16
  java:
    version: openjdk7
  environment:
    RAILS_ENV: test
    JRUBY_OPTS: -J-XX:+TieredCompilation -J-XX:TieredStopAtLevel=1 -J-noverify -X-C -Xcompile.invokedynamic=false --1.9 -J-Xmx2g

dependencies:
  bundler:
    without: [production, staging, benchmarking]
  cache_directories:
    - "vendor/bundle_java"
    - "vendor/bundle"

  pre:
    - rvm install 2.1.0
    - rvm install 2.2.0-preview1
    - rvm install jruby-1.7.16

  override:
    - rvm-exec 2.1.0 bash -c "bundle check --path=vendor/bundle || bundle install --path=vendor/bundle"
    - rvm-exec jruby-1.7.16 bash -c "bundle check --gemfile Gemfile.java --path=vendor/bundle_java || bundle install --gemfile Gemfile.java --path=vendor/bundle_java"

database:
  override:
    - cp config/database.yml.ci config/database.yml
    - cp config/shards.yml.ci config/shards.yml
    - rvm-exec 2.1.0 bash -c "bundle exec rake db:create db:structure:load --trace"

test:
  pre:
    - rvm-exec 2.1.0 bash -c "bundle exec rake assets:precompile --trace"
    - rvm-exec 2.2.0-preview1 bash -c "bundle exec rake assets:precompile --trace"
    - rvm-exec jruby-1.7.16 bash -c "bundle exec rake assets:precompile --trace"

  override:
    - rvm-exec 2.1.0 bash -c "bundle exec rspec --color --require spec_helper --format Fuubar spec"
    - rvm-exec 2.2.0-preview1 bash -c "bundle exec rspec --color --require spec_helper --format Fuubar spec"
    - rvm-exec jruby-1.7.16 bash -c "bundle exec --gemfile Gemfile.java rspec --color --require spec_helper --format Fuubar spec"

general:
  artifacts:
    - coverage