name: RuboCop

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        ruby: [2.5, 2.6, 2.7, 3.0, head]
    continue-on-error: ${{ endsWith(matrix.ruby, 'head') }}
    steps:
    - uses: actions/checkout@v2
    - name: Set up Ruby
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.ruby }}
    - name: Cache gems
      uses: actions/cache@v1
      with:
        path: vendor/bundle
        key: ${{ runner.os }}-rubocop-${{ hashFiles('**/Gemfile.lock') }}
        restore-keys: |
          ${{ runner.os }}-rubocop-
    - name: Install gems
      run: |
        bundle config path vendor/bundle
        bundle install --jobs 4 --retry 3
    - name: Run tests
      run: bundle exec rake test
    - name: Run RuboCop
      run: bundle exec rubocop --parallel