pipeline:

  build:
    image: alpine:edge
    commands:
      - sed -i 's@<VERSION>@${VERSION}@' Dockerfile

  docker:
    image: plugins/docker
    repo: bunix42/google-cloud-sdk
    build_args:
      - BASE_IMAGE=google/cloud-sdk:${VERSION}
    tags:
     - ${VERSION}
    secrets: [ docker_username, docker_password ]
    when:
      branch: master

matrix:
  VERSION:
    - 193.0.0-alpine