version: 2.1

jobs:
  canary:
    machine:
      image: ubuntu-2004:202201-02
    working_directory: ~/docker-volume-backup
    resource_class: large
    steps:
      - checkout
      - run:
          name: Build
          command: |
            docker build . -t offen/docker-volume-backup:canary
      - run:
          name: Install gnupg
          command: |
            sudo apt-get install -y gnupg
      - run:
          name: Run tests
          working_directory: ~/docker-volume-backup/test
          command: |
            export GPG_TTY=$(tty)
            ./test.sh canary

  build:
    docker:
      - image: cimg/base:2020.06
        environment:
          DOCKER_BUILDKIT: '1'
          DOCKER_CLI_EXPERIMENTAL: enabled
    working_directory: ~/docker-volume-backup
    resource_class: large
    steps:
      - checkout
      - setup_remote_docker:
          version: 20.10.6
      - docker/install-docker-credential-helper:
          release-tag: v0.6.4
      - docker/configure-docker-credentials-store
      - run:
          name: Push to Docker Hub
          command: |
            echo "$DOCKER_ACCESSTOKEN" | docker login --username offen --password-stdin
            # This is required for building ARM: https://gitlab.alpinelinux.org/alpine/aports/-/issues/12406
            docker run --rm --privileged linuxkit/binfmt:v0.8
            docker context create docker-volume-backup
            docker buildx create docker-volume-backup --name docker-volume-backup --use
            docker buildx inspect --bootstrap
            tag_args="-t offen/docker-volume-backup:$CIRCLE_TAG"
            if [[ "$CIRCLE_TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
              # prerelease tags like `v2.0.0-alpha.1` should not be released as `latest`
              tag_args="$tag_args -t offen/docker-volume-backup:latest"
              tag_args="$tag_args -t offen/docker-volume-backup:$(echo "$CIRCLE_TAG" | cut -d. -f1)"
            fi
            docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 \
               $tag_args . --push

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

orbs:
  docker: circleci/docker@2.1.4