action.yml

author: Arthri
name: Check Line Endings
description: "Lints text files' line endings."

inputs:
  default-eol:
    default: lf
    description: Specifies the default line ending. The supported values are "lf"(default), "crlf", and "mixed".
    required: false

runs:
  using: composite
  steps:
    # NOTE: If this script is updated, then /.github/workflows/i.yml must also be updated
    - name: Check Line Endings
      shell: bash
      env:
        DEFAULT_EOL: ${{ inputs.default-eol }}
      run: |
        exit_code=0

        while IFS= read line; do
          if [[ $line =~ ^i/([^ ]*)\ +w/[^\ ]*\ +attr/[^$'\t']+$'\t'(.+)$ ]] ; then
            index_eol=${BASH_REMATCH[1]}
            if [[ $index_eol != $DEFAULT_EOL && $index_eol != 'none' && $index_eol != '-text' && -n $index_eol ]] ; then
              echo "::error file=${BASH_REMATCH[2]}::${BASH_REMATCH[2]}: End-of-line sequence in index ($index_eol) must be $DEFAULT_EOL."
              exit_code=1
            fi
          else
            echo '::error::Unable to match '"$line"
            exit_code=1
          fi
        done < <(git ls-files --eol)

        exit $exit_code