name: Mutation tests
on:
  push:
    branches:
      - master
  pull_request:
jobs:
  mutation:
    name: Mutation tests
    runs-on: ubuntu-latest
    env:
      php-version: '8.1'
      php-extensions: xdebug, yaml
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0 # Needed for the `git diff` used below for Infection

      - name: Setup cache environment
        id: extcache
        uses: shivammathur/cache-extensions@v1
        with:
          php-version: ${{ matrix.php }}
          extensions: ${{ env.php-extensions }}
          key: mutation-php-extensions-${{ runner.os }}-${{ env.php-version }}

      - name: Cache PHP extensions
        uses: actions/cache@v2
        with:
          path: ${{ steps.extcache.outputs.dir }}
          key: ${{ steps.extcache.outputs.key }}
          restore-keys: ${{ steps.extcache.outputs.key }}

      - name: Setup PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ env.php-version }}
          extensions: ${{ env.php-extensions }}
          ini-values: zend.assertions=1

      - id: composer-cache
        run: echo "::set-output name=dir::$(composer config cache-files-dir)"

      - name: Cache Composer dependencies
        uses: actions/cache@v2
        with:
          path: ${{ steps.composer-cache.outputs.dir }}
          key: composer-${{ runner.os }}-${{ hashFiles('composer.json') }}
          restore-keys: composer-${{ runner.os }}

      - name: Install dependencies
        run: composer update --prefer-dist --no-interaction

      - name: Creating var directory
        run: mkdir -p var/cache

      - name: Running mutation tests
        if: github.ref == 'refs/heads/master'
        run: php vendor/bin/infection --threads=$(nproc)
        env:
          INFECTION_BADGE_API_KEY: ${{ secrets.INFECTION_BADGE_API_KEY }}

      - name: Running mutation tests
        if: github.event_name == 'pull_request'
        run: |
          git fetch --depth=1 origin $GITHUB_BASE_REF
          php vendor/bin/infection --threads=$(nproc) --git-diff-lines --git-diff-base=origin/$GITHUB_BASE_REF --logger-github --ignore-msi-with-no-mutations --only-covered