crlf-check.yml

# This workflow checks for CRLF line endings in the repository. It runs on pull requests and can also be triggered manually.
# It intentionally is run on the whole repository to catch any CRLFs, even in files that may not be directly edited in a PR. It excludes .bat and .ps1 files which may legitimately use CRLF.
name: CRLF Line Ending Check

on:
  pull_request:
  workflow_dispatch:

permissions:
  contents: read

jobs:
  validate-files:
    name: Check for CRLF line endings
    runs-on: ubuntu-latest
    steps:
      - name: Disable Git autocrlf
        run: git config --global core.autocrlf false

      - uses: actions/checkout@v4

      - name: Find CRLF
        run: |
          set -euo pipefail
          # Check for CRLF in committed files using git ls-files --eol
          # This checks the actual committed line endings, not the working directory
          if git ls-files --eol -- . ':(exclude)*.bat' ':(exclude)*.ps1' | grep 'i/crlf'; then
            echo "::error title=CRLF line endings found::CRLF (\\r\\n) line endings detected in committed files. Convert files to LF using .gitattributes and recommit."
            git ls-files --eol -- . ':(exclude)*.bat' ':(exclude)*.ps1' | grep 'i/crlf'
            exit 1
          fi

      - name: Success
        run: echo "No CRLF line endings detected."