name: CI
on: [push, pull_request]
jobs:
  test:
    strategy:
      fail-fast: false
      matrix:
        gemfile: [ rails_5.1, rails_5.2, rails_6.0, rails_6.1, rails_7.0 ]
        ruby: [ 2.4, 2.5, 2.6, 2.7, '3.0' ]
        exclude:
          - gemfile: rails_5.1
            ruby: 3.0
          - gemfile: rails_5.2
            ruby: 3.0
          - gemfile: rails_6.0
            ruby: 2.4
          - gemfile: rails_6.1
            ruby: 2.4
          - gemfile: rails_7.0
            ruby: 2.4
          - gemfile: rails_7.0
            ruby: 2.5
          - gemfile: rails_7.0
            ruby: 2.6

    runs-on: ubuntu-latest
    env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
    steps:
      - uses: actions/checkout@v2
      - uses: ruby/setup-ruby@v1
        with:
          ruby-version: ${{ matrix.ruby }}
          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
      - run: bundle exec rake