name: PHPStan

on:
  pull_request:
    paths:
      - '**.php'
      - composer.json
      - tools/phpstan/composer.json
      - ci/composer.json
      - phpstan.ci.neon
      - phpstan.neon.dist

jobs:
  phpstan:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        php-versions: ['7.4', '8.0', '8.1']
        prefer: ['prefer-stable', 'prefer-lowest']
    name: PHPStan with PHP ${{ matrix.php-versions }} ${{ matrix.prefer }}

    steps:
    - uses: actions/checkout@v3

    - name: Setup PHP
      uses: shivammathur/setup-php@v2
      with:
        php-version: ${{ matrix.php-versions }}
        coverage: none
      env:
        fail-fast: true

    - name: Get composer cache directory
      id: composer-cache
      run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT

    - name: Cache dependencies
      uses: actions/cache@v3
      with:
        path: ${{ steps.composer-cache.outputs.dir }}
        key: ${{ runner.os }}-composer-${{ matrix.prefer }}-${{ hashFiles('**/composer.json') }}
        restore-keys: ${{ runner.os }}-composer-${{ matrix.prefer }}-

    - name: Install dependencies
      run: |
        composer update --no-progress --prefer-dist --${{ matrix.prefer }} &&
        composer composer-phpunit -- update --no-progress --prefer-dist &&
        composer composer-phpstan -- update --no-progress --prefer-dist --optimize-autoloader &&
        composer --working-dir=ci update --no-progress --prefer-dist --${{ matrix.prefer }} --optimize-autoloader --ignore-platform-req=ext-gd

    - name: Run PHPStan
      run: composer phpstan -- analyse -c phpstan.ci.neon