linter.yml

name: Linting

# Trigger each time HEAD branch is updated in a pull request
# see https://github.com/orgs/community/discussions/26366
on:
  pull_request:
    types: [opened, reopened, synchronize, ready_for_review]

jobs:

  rubocop:
    name: RuboCop (Ruby)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 2 # to also fetch parent of PR (used to get changed files)

      - name: Get changed files
        id: rb-changed
        uses: ./.github/actions/changed_files/
        with:
          file-extensions: \.rb$

      - name: Set up Ruby 3
        if: ${{ steps.rb-changed.outputs.changed-files != ''}}
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: 3.1.4
          bundler-cache: true

      - name: Run RuboCop
        if: ${{ steps.rb-changed.outputs.changed-files != ''}}
        run: |
          echo "🚨 Running RuboCop version: $(bundle info rubocop | head -1)"
          bundle exec rubocop --format github --fail-level 'convention' --force-exclusion -- $CHANGED_FILES

  eslint:
      name: ESLint (JS)
      runs-on: ubuntu-latest
      steps:
        - name: Checkout code
          uses: actions/checkout@v4
          with:
            fetch-depth: 2 # to also fetch parent of PR (used to get changed files)

        - name: Get changed files
          id: js-changed
          uses: ./.github/actions/changed_files/
          with:
            # .(mjs is only used for eslint.config.mjs as of January 2024)
            file-extensions: \.js$|\.mjs$|\.js.erb$

        - name: Setup Node.js
          if: ${{ steps.js-changed.outputs.changed-files != ''}}
          uses: actions/setup-node@v4
          with:
            node-version: '20' # End of Life (EOL): April 2026
            cache: 'yarn'

        - name: Install dependencies
          if: ${{ steps.js-changed.outputs.changed-files != ''}}
          run: yarn install

        # with ESLint v9 --ignore-path does not exist anymore
        # see [1] for the PR. However, my feeling for this is totally reflected
        # by [2]. Hopefully, it will come back in future versions.
        # [1] https://github.com/eslint/eslint/pull/16355
        # [2] https://github.com/eslint/eslint/issues/16264#issuecomment-1292858747
        - name: Run ESLint
          if: ${{ steps.js-changed.outputs.changed-files != ''}}
          run: |
            echo "🚨 Running ESLint version: $(yarn run --silent eslint --version)"
            yarn run eslint --max-warnings 0 --no-warn-ignored ${{ steps.js-changed.outputs.changed-files }}