whitespace.yml

name: Whitespace Check

on:
  pull_request:
  push:
    branches:
      - master

jobs:
  whitespace-check:
    runs-on: ubuntu-latest

    steps:
    - name: Set commit count
      shell: bash
      run: echo "COMMIT_DEPTH=$((1 + ${{ github.event.pull_request.commits }}))" >> $GITHUB_ENV

    - name: Checkout code
      uses: actions/checkout@v2
      with:
        fetch-depth: ${{ env.COMMIT_DEPTH }}

    # TODO: reintroduce this check when the library is cleaned up
    # - name: Check for trailing whitespace
    #   run: |
    #     TRAILING_WHITESPACE=$(git grep -l -z -E '\s+$' | xargs -0 sed -n '/\s$/p')
    #     if [ -n "$TRAILING_WHITESPACE" ]; then
    #       echo "Trailing whitespace found. Please fix with:\
    #       bash ./etc/fix_trailing_whitespace.sh"
    #       exit 1
    #     fi

    - name: Check that every file ends correctly
      run: |
        while IFS= read -r file; do
          # Check if the file is a regular file
          if [ -f "$file" ]; then
            if [ -n "$(tail -c 1 "$file")" ]; then
              echo "File $file does not end with a newline. Please fix with:\
              bash ./etc/fix_end_newlines.sh"
              exit 1
            fi
          fi
        done < <(git ls-files)

# Get the repo with the commits(+1) in the series.
# Process `git log --check` output to extract just the check errors.

    - name: git log --check
      id: check_out
      run: |
        log=
        commit=
        while read dash etc
        do
          case "${dash}" in
          "---")
            commit="${etc}"
            ;;
          "")
            ;;
          *)
            if test -n "${commit}"
            then
              log="${log}\n${commit}"
              echo ""
              echo "--- ${commit}"
            fi
            commit=
            log="${log}\n${dash} ${etc}"
            echo "${dash} ${etc}"
            ;;
          esac
        done <<< $(git log --check --pretty=format:"---% h% s" -${{github.event.pull_request.commits}})

        if [ -n "${log}" ]; then
          echo "${log}" >> $GITHUB_OUTPUT
          exit 2
        fi