Circle CI workflows config to test and deploy Ruby on Rails application with PostgreSQL database. Test with Rspec, precompile assets then deploy with Capistrano.

config.yml

# Ruby CircleCI 2.0 configuration file
#
# Check https://circleci.com/docs/2.0/language-ruby/ for more details
#

defaults: &defaults
  working_directory: ~/repo
  docker:
    - image: circleci/ruby:2.4.1-node-browsers
      environment:
        RAILS_ENV: test
        PGHOST: 127.0.0.1
        DATABASE_URL: "postgres://ubuntu@localhost:5432/oferta_test"
    - image: circleci/postgres:9.4
      environment:
        POSTGRES_USER: ubuntu
        POSTGRES_DB: oferta_test

version: 2
jobs:
  bundle_dependencies:
    <<: *defaults
    steps:
      - checkout
      - attach_workspace:
          at: ~/repo
      - restore_cache:
          keys:
          - v1-dependencies-{{ checksum "Gemfile.lock" }}
      - run: bundle install --jobs=4 --retry=3 --path vendor/bundle
      - save_cache:
          key: v1-dependencies-{{ checksum "Gemfile.lock" }}
          paths:
            - ~/repo/vendor/bundle
      - persist_to_workspace:
          root: .
          paths: vendor/bundle

  rake_test:
    <<: *defaults
    steps:
      - checkout
      - attach_workspace:
          at: ~/repo
      - run: bundle --path vendor/bundle
#      - run:
#          name: Rubocop
#          command: bin/rubocop --rails

      # Database setup
      - run: bundle exec rake db:create
      - run: bundle exec rake db:schema:load

      - run:
          name: run tests
          command: |
            mkdir /tmp/test-results
            TEST_FILES="$(circleci tests glob "spec/**/*_spec.rb" | circleci tests split --split-by=timings)"

            bundle exec rspec --format progress \
                            --format RspecJunitFormatter \
                            --out /tmp/test-results/rspec.xml \
                            --format progress \
                            -- \
                            $TEST_FILES

      # collect reports
      - store_test_results:
          path: /tmp/test-results
      - store_artifacts:
          path: /tmp/test-results
          destination: test-results
  precompile_assets:
    <<: *defaults
    steps:
      - checkout
      - attach_workspace:
          at: ~/repo
      - run: bundle --path vendor/bundle
      - run:
          name: Precompile assets
          command: bundle exec rake assets:precompile
      - persist_to_workspace:
          root: .
          paths: public/assets

  deploy:
    <<: *defaults
    steps:
      - checkout
      - attach_workspace:
          at: ~/repo
      - run: bundle --path vendor/bundle
      - run:
          command: bundle exec cap staging deploy

workflows:
  version: 2
  build-and-deploy:
    jobs:
      - bundle_dependencies
      - rake_test:
          requires:
            - bundle_dependencies
      - precompile_assets:
          requires:
            - bundle_dependencies
      - deploy:
          requires:
            - rake_test
            - precompile_assets
          filters:
            branches:
              only: develop