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path: root/.github/workflows/check-whitespace.yml
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name: check-whitespace

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

on:
  pull_request:
    types: [opened, synchronize]

jobs:
  check-whitespace:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - 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.base.sha}}..)

        if test -n "${log}"
        then
          exit 2
        fi