action.yml

name: 'Validate DBC'
description: 'Github Action for validating .dbc files using cantools.'
author: 'Polymath Robotics'

branding:
  icon: 'check-circle'
  color: 'green'

inputs:
  path:
    description: 'Directory to search recursively for .dbc files (used when `files` is empty).'
    required: false
    default: '.'
  files:
    description: 'Explicit space- or newline-separated list of .dbc files. Overrides `path` when set.'
    required: false
    default: ''
  python-version:
    description: 'Python version used to run the validator.'
    required: false
    default: '3.10'
  cantools-version:
    description: 'pip version specifier appended to "cantools" (e.g. ">=40,<41").'
    required: false
    default: '>=40,<41'

runs:
  using: 'composite'
  steps:
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: ${{ inputs.python-version }}

    - name: Install cantools
      shell: bash
      env:
        CANTOOLS_VERSION: ${{ inputs.cantools-version }}
      run: python -m pip install --upgrade "cantools${CANTOOLS_VERSION}"

    - name: Validate DBC files
      shell: bash
      env:
        INPUT_FILES: ${{ inputs.files }}
        INPUT_PATH: ${{ inputs.path }}
        ACTION_PATH: ${{ github.action_path }}
      run: |
        if [ -n "$INPUT_FILES" ]; then
          read -r -a files <<< "$INPUT_FILES"
        else
          mapfile -t files < <(find "$INPUT_PATH" -type f -name '*.dbc' | sort)
        fi
        if [ "${#files[@]}" -eq 0 ]; then
          echo "No .dbc files found."
          exit 0
        fi
        python "$ACTION_PATH/scripts/validate_dbc.py" "${files[@]}"