# To update the build configuration, edit the "builds" array below and run:
# erb .circleci/config.yml.erb > .circleci/config.yml


# The default Ruby containers modify the behaviour of Bundler in a way that breaks
# the CI since it makes it harder to run multiple apps in a single container
# See https://github.com/docker-library/docs/pull/1221/files for a summary
# Unsettting these variables restores the default behaviour:-
#   * BUNDLE_APP_CONFIG
#   * GEM_HOME
#   * BUNDLE_PATH
#   * BUNDLE_BIN
common_ruby_environment: &common_ruby_environment
  environment:
    RAILS_ENV: test
    PGHOST: 127.0.0.1
    PGUSER: postgres
    POSTGRES_HOST_AUTH_METHOD: "trust"
common_pg_environment_vars: &common_pg_environment_vars
    POSTGRES_USER: postgres
    POSTGRES_DB: ror_testapp_test
    POSTGRES_HOST_AUTH_METHOD: "trust"
<%
  builds = [
    ['2.4.6', 'rails_4'],
    ['2.4.6', 'rails_5'],
    ['2.4.6', 'rails_5_1'],
    ['2.4.6', 'rails_5_2'],
    ['2.5.5', 'rails_4'],
    ['2.5.5', 'rails_5'],
    ['2.5.5', 'rails_5_1'],
    ['2.5.5', 'rails_5_2'],
    ['2.6.5', 'rails_6']
  ]
%>
version: 2
jobs:
<% builds.each do |ruby,variant| %>
  build_<%= ruby %>_<%= variant %>:
    docker:
      - image: ruby:<%= ruby %>-alpine
        <<: *common_ruby_environment
      - image: postgres:9.6-alpine
        environment:
          PGDATA: /dev/shm/pgdata
          <<: *common_pg_environment_vars
      - image: redis:4-alpine
    steps:
      - checkout

      - run:
          name: Setup RAM disk
          command: |
            rm -rf ~/project/tmp ;
            mkdir /dev/shm/tmp ;
            ln -s /dev/shm/tmp ~/project/tmp

      - run:
          name: Setup requirements
          command: |
            apk add --update git bash build-base postgresql-dev sqlite-dev tzdata nodejs

      - run:
          name: Configure bundler
          command: |
            unset \
              BUNDLE_APP_CONFIG \
              GEM_HOME \
              BUNDLE_PATH \
              BUNDLE_BIN
            bundle config --local gemfile $PWD/gemfiles/<%= variant %>.gemfile

      - restore_cache:
          keys:
            - v2-bundle-<%= ruby %>-<%= variant %>-{{ .Branch }}
            - v2-bundle-<%= ruby %>-<%= variant %>
            - v2-bundle-<%= ruby %>

      - run:
          name: Install bundle
          command: |
            unset \
              BUNDLE_APP_CONFIG \
              GEM_HOME \
              BUNDLE_PATH \
              BUNDLE_BIN
            bundle install --jobs=3 --retry=3 --path=$PWD/vendor/bundle

      # The default Ruby containers modify the behaviour of Bundler in a way that breaks
      # the CI since it makes it harder to run multiple apps in a single container
      # See https://github.com/docker-library/docs/pull/1221/files for a summary
      # Unsettting the variables restores the default behaviour
      - run:
          name: Run test suite
          command: |
            unset \
              RACK_ENV \
              RAILS_ENV \
              BUNDLE_APP_CONFIG \
              GEM_HOME \
              BUNDLE_PATH \
              BUNDLE_BIN
            bundle exec rspec

      - save_cache:
          key: v2-bundle-<%= ruby %>-<%= variant %>-{{ .Branch }}
          paths:
            - ~/project/vendor/bundle
            - ~/project/vendor/bundle-scaffold
      - save_cache:
          key: v2-bundle-<%= ruby %>-<%= variant %>
          paths:
            - ~/project/vendor/bundle
            - ~/project/vendor/bundle-scaffold
      - save_cache:
          key: v2-bundle-<%= ruby %>
          paths:
            - ~/project/vendor/bundle
            - ~/project/vendor/bundle-scaffold
<% end %>

workflows:
  version: 2
  test:
    jobs:
    <% builds.each do |ruby,variant| %>
      - build_<%= ruby %>_<%= variant %>
    <% end %>