name: "Lint composer.json"

on:
  pull_request:
  push:

jobs:
  coding-standards:
    name: "Lint composer.json"

    runs-on: ${{ matrix.operating-system }}

    strategy:
      matrix:
        dependencies:
          - "highest"
        php-version:
          - "8.0"
        operating-system:
          - "ubuntu-latest"

    steps:
      - name: "Checkout"
        uses: "actions/checkout@v2"

      - name: "Install PHP"
        uses: "shivammathur/setup-php@v2"
        with:
          coverage: "none"
          php-version: "${{ matrix.php-version }}"
          ini-values: memory_limit=-1
          tools: composer:v2, composer-normalize, composer-require-checker, composer-unused

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

      - name: "Cache dependencies"
        uses: "actions/cache@v2"
        with:
          path: ${{ steps.composer-cache.outputs.dir }}
          key: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('**/composer.lock') }}"
          restore-keys: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-"

      - name: "Install lowest dependencies"
        if: ${{ matrix.dependencies == 'lowest' }}
        run: "composer update --prefer-lowest --no-interaction --no-progress"

      - name: "Install highest dependencies"
        if: ${{ matrix.dependencies == 'highest' }}
        run: "composer update --no-interaction --no-progress"

      - name: "Install locked dependencies"
        if: ${{ matrix.dependencies == 'locked' }}
        run: "composer install --no-interaction --no-progress"

      - name: "Validate composer.json"
        run: "composer validate --strict"

      - name: "Normalize composer.json"
        run: "composer-normalize --dry-run"

      # Disabling it for now (doesn't run on PHP 8)
      #
      #- name: "Check composer.json explicit dependencies"
      #  run: "composer-require-checker check --config-file=$(realpath composer-require-checker.json)"

      - name: "Check composer.json unused dependencies"
        run: "composer-unused"

Make sure composer.json is standardised
Make sure composer.json is standardised
