version: 2.1

executors:
  default:
    parameters:
      ruby_version:
        type: enum
        enum: ['2.3', '2.4', '2.5', '2.6']
    docker:
      - image: ruby:<< parameters.ruby_version >>-alpine
    working_directory: /work

commands:
  setup_requirements:
    steps:
      - run:
          name: Install System Dependencies
          command: |
            # See also https://circleci.com/docs/2.0/custom-images/#adding-required-and-custom-tools-or-files
            apk add --update-cache --no-cache --no-progress git openssh-client tar gzip ca-certificates \
              build-base tzdata
      - run:
          name: Set timezone to Asia/Tokyo
          command: cp /usr/share/zoneinfo/Asia/Tokyo /etc/localtime
  restore_bundle_cache:
    parameters:
      ruby_version:
        type: enum
        enum: ['2.3', '2.4', '2.5', '2.6']
    steps:
      - restore_cache:
          name: Restore bundle cache
          keys:
            - gems-ruby<< parameters.ruby_version >>-{{ .Environment.COMMON_CACHE_KEY }}-{{ checksum "Gemfile.lock" }}
            - gems-ruby<< parameters.ruby_version >>-{{ .Environment.COMMON_CACHE_KEY }}-
  save_bundle_cache:
    parameters:
      ruby_version:
        type: enum
        enum: ['2.3', '2.4', '2.5', '2.6']
    steps:
      - save_cache:
          name: Save bundle cache
          key: gems-ruby<< parameters.ruby_version >>-{{ .Environment.COMMON_CACHE_KEY }}-{{ checksum "Gemfile.lock" }}
          paths:
            - /usr/local/bundle

jobs:
  build:
    parameters:
      ruby_version:
        type: enum
        enum: ['2.3', '2.4', '2.5', '2.6']
    executor:
      name: default
      ruby_version: << parameters.ruby_version >>
    steps:
      - setup_requirements
      - checkout
      - restore_bundle_cache:
          ruby_version: << parameters.ruby_version >>
      - run:
          name: bundle install
          command: |
            bundle check || bundle install --jobs=4 --retry=3
            bundle clean
      - save_bundle_cache:
          ruby_version: << parameters.ruby_version >>
      - run: rubocop
      - run: rspec
  continuous_bundle_update:
    executor:
      name: default
      ruby_version: '2.6'
    steps:
      - setup_requirements
      - checkout
      - restore_bundle_cache:
          ruby_version: '2.6'
      - run:
          name: Install edge circleci-bundle-update-pr
          command: |
            gem install -N specific_install
            gem specific_install https://github.com/masutaka/circleci-bundle-update-pr.git
      - deploy:
          name: Run circleci-bundle-update-pr
          command: circleci-bundle-update-pr CircleCI circleci@example.com $CIRCLE_BRANCH

workflows:
  version: 2
  ordinary:
    jobs:
      - build:
          name: ruby-2.3
          ruby_version: '2.3'
      - build:
          name: ruby-2.4
          ruby_version: '2.4'
      - build:
          name: ruby-2.5
          ruby_version: '2.5'
      - build:
          name: ruby-2.6
          ruby_version: '2.6'
  nightly:
    triggers:
      - schedule:
          cron: "00 10 * * 5"
          filters:
            branches:
              only: master
    jobs:
      - continuous_bundle_update