lint-line-endings.yml

name: Line Ending Linter
on:
  push:
    branches: ["**"]  # Runs on every push to every branch
  pull_request:
    branches: ["**"]

permissions:
  contents: read

jobs:
  check-crlf:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Scan for CRLF (\r)
        run: |
          # List files with \r, excluding the .git directory
          BAD_FILES=$(grep -rIl $'\r' --exclude-dir=.git --exclude-dir=windows . || true)
          
          if [ -n "$BAD_FILES" ]; then
            echo "ERROR: CRLF (Windows) line endings detected!"
            echo "The following files must be LF:"
            echo "$BAD_FILES"
            echo ""
            echo "FIX: Run these commands on your machine:"
            echo "  git add --renormalize ."
            echo "  git commit -m 'fix: normalize line endings'"
            echo "  git push"
            exit 1
          else
            echo "OK: All files are clean (LF)."
          fi