stages:
  - push:readme
  - build:docker

workflow:
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push"'
    - if: $CI_COMMIT_TAG

variables:
  DOCKERHUB_REGISTRY: index.docker.io
  DOCKERHUB_REPO: bw_backup
  IMAGE_NAME_DOCKERHUB: $DOCKERHUB_REGISTRY/$DOCKERHUB_USER/$DOCKERHUB_REPO
  # see https://gitlab.com/gitlab-org/gitlab-runner/issues/4501
  DOCKER_DRIVER: overlay2
  DOCKER_TLS_CERTDIR: "/certs"
  # See https://github.com/docker/buildx/releases
  BUILDX_VERSION: v0.5.1
  BUILDX_ARCH: linux-amd64

.docker_login: &docker_login
  docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY

.dockerhub_login: &dockerhub_login
  docker login -u "$DOCKERHUB_USER" -p "$DOCKERHUB_PASSWORD" $DOCKERHUB_REGISTRY

.docker_build_template: &docker_build
  stage: build:docker
  image: docker:latest
  services:
    - name: docker:dind
      command: ["--experimental"]
  tags:
    - shared
  before_script:
    - apk add curl
    - mkdir -p ~/.docker/cli-plugins
    - curl -sSLo ~/.docker/cli-plugins/docker-buildx https://github.com/docker/buildx/releases/download/$BUILDX_VERSION/buildx-$BUILDX_VERSION.$BUILDX_ARCH 
    - chmod +x ~/.docker/cli-plugins/docker-buildx
    - docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
    - docker context create my-context
    - docker buildx create --use my-context
    - docker info

push_readme:
  stage: push:readme
  image: docker:latest
  services:
    - docker:dind
  tags:
    - shared
  script:
    - docker run 
      -v $(pwd)/README.md:/data/README.md:ro
      -e DOCKER_USER=$DOCKERHUB_USER 
      -e DOCKER_PASS=$DOCKERHUB_PASSWORD 
      -e PUSHRM_FILE=/data/README.md
      -e PUSHRM_TARGET=docker.io/$DOCKERHUB_USER/$DOCKERHUB_REPO
      chko/docker-pushrm
  rules:
    - if: '$CI_COMMIT_BRANCH == "master"'
      changes:
        - README.md

build_master:
  <<: *docker_build
  script:
    - *docker_login
    - *dockerhub_login
    #- docker build --pull -t "$IMAGE_NAME" -t "$IMAGE_NAME_DOCKERHUB:${CI_COMMIT_TAG:-latest}" .
    - docker buildx build 
      --push 
      --platform linux/arm/v7,linux/arm64/v8,linux/amd64 
      --tag "$CI_REGISTRY_IMAGE:${CI_COMMIT_TAG:-latest}" 
      --tag "$IMAGE_NAME_DOCKERHUB:${CI_COMMIT_TAG:-latest}" .
    #- docker push "$IMAGE_NAME"
    #- docker push "$IMAGE_NAME_DOCKERHUB:${CI_COMMIT_TAG:-latest}"
  rules:
    - if: '$CI_COMMIT_BRANCH == "master" || $CI_COMMIT_TAG'
      changes:
        - Dockerfile
        - backup.sh
        - entrypoint.sh

build:
  <<: *docker_build
  script:
    - *docker_login
    #- docker build --pull -t "$CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG/bw_backup:${CI_COMMIT_TAG:-latest}" .
    - docker buildx build 
      --push 
      --platform linux/arm/v7,linux/arm64/v8,linux/amd64 
      --tag "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME" .
    #- docker push "$CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG/bw_backup:${CI_COMMIT_TAG:-latest}"
  rules:
    - if: '$CI_COMMIT_BRANCH == "master" || $CI_COMMIT_TAG'
      when: never
    - when: on_success