version: 2.1

jobs:
  canary:
    docker:
      - image: cimg/base:2020.06
    working_directory: ~/docker-volume-backup
    steps:
      - checkout
      - setup_remote_docker:
          version: 20.10.6
      - run:
          name: Build
          command: |
            docker build . -t offen/docker-volume-backup:canary
      - run:
          name: Create container from image
          command: |
            docker run -d offen/docker-volume-backup:canary
            echo "Sleeping for 30s before checking if container is still running."
            sleep 30
            count=$(docker ps -q | wc -l)
            if [[ $count != "1" ]]; then
              echo "Expected one container to be running, found $count."
              exit 1
            fi
            docker stop $(docker ps -q)

  build:
    docker:
      - image: cimg/base:2020.06
        environment:
          DOCKER_BUILDKIT: '1'
          DOCKER_CLI_EXPERIMENTAL: enabled
    working_directory: ~/docker-volume-backup
    steps:
      - checkout
      - setup_remote_docker:
          version: 20.10.6
      - docker/install-docker-credential-helper
      - docker/configure-docker-credentials-store
      - run:
          name: Push to Docker Hub
          command: |
            echo "$DOCKER_ACCESSTOKEN" | docker login --username offen --password-stdin
            # This is required for building ARM: https://gitlab.alpinelinux.org/alpine/aports/-/issues/12406
            docker run --rm --privileged linuxkit/binfmt:v0.8
            docker context create docker-volume-backup
            docker buildx create docker-volume-backup --name docker-volume-backup --use
            docker buildx inspect --bootstrap
            docker buildx build --platform linux/arm64,linux/amd64 \
              -t offen/docker-volume-backup:$CIRCLE_TAG \
              -t offen/docker-volume-backup:latest \
              . --push

workflows:
  version: 2
  docker_image:
    jobs:
      - canary:
          filters:
            tags:
              ignore: /^v.*/
      - build:
          filters:
            branches:
              ignore: /.*/
            tags:
              only: /^v.*/

orbs:
  docker: circleci/docker@1.0.1