name: 'CI'
on:
  push:
    branches-ignore:
      - 'production'
      - 'docs'
    paths-ignore:
      - '.github/**'
      - '!.github/workflows/ci.yml'
      - '.gitignore'
      - 'README.md'
      - 'LICENSE'
  pull_request:
    paths:
      - '**'

jobs:
  build:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        ruby: ['2.7', '3.0', '3.1']

    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0  # for posts's lastmod

      - name: Setup Ruby
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: ${{ matrix.ruby }}
          bundler-cache: true

      - name: Test Site
        run: bash tools/test