one way of using yaml features to DRY up drone.yml

drone.yml

invalidate-cloudfront-common: &invalidate-cloudfront-common
  image: cgswong/aws:aws
  commands:
    - aws configure set preview.cloudfront true
    - aws cloudfront create-invalidation --distribution-id $DISTRIBUTION_ID --paths "/*"
  secrets: [AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY]

pipeline:
  invalidate-cloudfront-dev:
    <<: *invalidate-cloudfront-common
    when:
      event: deployment
      environment: dev
    environment:
      - DISTRIBUTION_ID=XXXXXXXXXXXXX1

  invalidate-cloudfront-qa:
    <<: *invalidate-cloudfront-common
    when:
      event: deployment
      environment: qa
    environment:
      - DISTRIBUTION_ID=XXXXXXXXXXXXX2

  invalidate-cloudfront-stable:
    <<: *invalidate-cloudfront-common
    when:
      event: deployment
      environment: stable
    environment:
      - DISTRIBUTION_ID=XXXXXXXXXXXXX3