builder/.drone.yml

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kind: pipeline
name: build-and-upload

steps:
  - name: send-tags-to-tags-file
    image: alpine
    when:
      event:
        - push
        - pull_request
    commands:
      - echo -n "latest, $(date +'%Y-%m-%d'), ${DRONE_COMMIT_SHA:0:7}, ${DRONE_COMMIT_SHA}, ${DRONE_BRANCH}" > .tags
  - name: build-and-push
    image: plugins/docker
    environment:
      DOCKER_BUILDKIT: 1
    network_mode: bridge
    settings:
      repo: sneak/builder
      force_tag: true
      username:
        from_secret: DOCKER_USERNAME
      password:
        from_secret: DOCKER_TOKEN
  - name: notify
    image: plugins/slack
    settings:
      webhook:
        from_secret: SLACK_WEBHOOK_URL
    when:
      event: pull_request