Example usage in a github actions flow

name: OpenAPI

on:
  push:
    branches:
      - 'master'
  pull_request:
    branches:
      - '**'

jobs:
  build:
    name: Preview
    runs-on: ubuntu-latest
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: '0'
    - name: Check whether docs have changed
      id: checkdocs
      run: |
          changed=false
          git diff --name-only HEAD^ HEAD > files.txt
          while IFS= read -r file
          do
            if [[ $file == openapi/* ]]; then
              echo "detected openapi spec change"
              changed=true
            fi
          done < files.txt
          if [ $changed == true ]
          then
            echo "::set-output name=build_docs::true"
          else
            echo "::set-output name=build_docs::false"
          fi
    - name: Build the OpenAPI specs
      if: steps.checkdocs.outputs.build_docs == 'true'
      uses: acud/openapi-dockerized@v1
      with:
        build-roots: 'openapi/<spec name>.yaml openapi/<another spec name>.yaml'
      env:
        AWS_ACCESS_KEY_ID: ${{ secrets.DO_AWS_ACCESS_KEY_ID }}
        AWS_SECRET_ACCESS_KEY: ${{ secrets.DO_AWS_SECRET_ACCESS_KEY }}
        AWS_EC2_METADATA_DISABLED: true #needed when pushing to DigitalOcean Spaces
        AWS_ENDPOINT: fra1.digitaloceanspaces.com
        BUCKET_NAME: <bucket name>