version: 2.1

jobs:
  build:
    docker:
      - image: cimg/base:2020.06
    working_directory: ~/docker-volume-backup
    steps:
      - checkout
      - setup_remote_docker
      - run:
          name: Build
          command: make build
      - run:
          name: Check if image needs to be pushed
          command: |
            if [[ -z "$CIRCLE_TAG" ]]; then
              echo "Not a git tag, nothing to do ..."
              circleci-agent step halt
            fi
      - docker/install-docker-credential-helper
      - docker/configure-docker-credentials-store
      - run:
          name: Push to Docker Hub
          command: |
            echo "$DOCKER_ACCESSTOKEN" | docker login --username offen --password-stdin
            docker tag offen/docker-volume-backup:local offen/docker-volume-backup:$CIRCLE_TAG
            docker tag offen/docker-volume-backup:local offen/docker-volume-backup:latest
            docker push offen/docker-volume-backup:$CIRCLE_TAG
            docker push offen/docker-volume-backup:latest

workflows:
  version: 2
  deploy:
    jobs:
      - build

orbs:
  docker: circleci/docker@1.0.1