validate-oas-files.yml

name: Validate OAS Files

on: [pull_request]

jobs:
  discover-changed-files:
    name: Discover Changed OpenAPI Files
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
      has_changes: ${{ steps.changed-files.outputs.any_changed }}
    steps:
    - uses: actions/checkout@v3
    - name: Check for changed OAS files
      id: changed-files
      uses: tj-actions/changed-files@v41
      with:
        files: |
          openapi/**/*.yml
          openapi/**/*.yaml
    - name: Build matrix from changed files
      id: set-matrix
      if: steps.changed-files.outputs.any_changed == 'true'
      run: |
        matrix_json=$(echo '${{ steps.changed-files.outputs.all_changed_files }}' | jq -R -s -c '
          split(" ") |
          map(select(length > 0)) |
          map({
            openapi_file: .,
            filename: (. | split("/")[-1])
          })
        ')
        echo "matrix=${matrix_json}" >> $GITHUB_OUTPUT
        echo "Changed files matrix: ${matrix_json}"

  validate-openapi:
    name: Validate ${{ matrix.filename }}
    needs: discover-changed-files
    if: needs.discover-changed-files.outputs.has_changes == 'true'
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include: ${{ fromJson(needs.discover-changed-files.outputs.matrix) }}
    steps:
    - uses: actions/checkout@v3
    - name: Validate Schema for ${{ matrix.openapi_file }}
      uses: thiyagu06/openapi-validator-action@v1
      with:
        filepath: ${{ matrix.openapi_file }}
    - name: Validate YAML for ${{ matrix.openapi_file }}
      uses: ibiqlik/action-yamllint@v3
      with:
        file_or_dir: ${{ matrix.openapi_file }}
        config_file: .yamllint.yml