name: rubocop

on:
  pull_request:
    types: [opened, synchronize]
  push:
    branches: [ main ]

jobs:
  build:
    runs-on: ubuntu-latest
    timeout-minutes: 10

    steps:
    - uses: actions/checkout@v2
    - name: setup ruby
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: '2.5'
    - name: cache gems
      uses: actions/cache@v2
      with:
        path: vendor/bundle
        key: ${{ runner.os }}-rubocop-${{ hashFiles('**/Gemfile.lock') }}
        restore-keys: ${{ runner.os }}-rubocop-
    - name: install gems
      run: |
        bundle config set path vendor/bundle
        bundle install --jobs 4 --retry 3
    - name: exec rubocop
      run: bundle exec rubocop --parallel