circle.yml

version: 2
jobs:

  build:
    environment:
      - TZ: "/usr/share/zoneinfo/America/Los_Angeles"
      - RPN_API_TAG: 1.0.6

    docker:
      - image: docker:18.01.0-ce-git
    working_directory: /tmp/src/rpn-signature
    steps:
      - run:
          name: Install parallel gzip and python3
          command: apk add --no-cache pigz python3
      - restore_cache:
          keys:
            - docker-v1-{{ .Branch }}-{{ epoch }}
            - docker-v1-{{ .Branch }}-
            - docker-v1-master-
            - docker-v1-
          paths:
            - /tmp/cache/docker.tar.gz
            - /tmp/cache/webapi.tar.gz

      - checkout
      - setup_remote_docker
      - run:
          name: Load Docker image layer cache
          no_output_timeout: 30m
          command: |
            docker info
            set +o pipefail
            if [ -f /tmp/cache/docker.tar.gz ]; then
              pigz -d --stdout /tmp/cache/docker.tar.gz | docker load
            fi
            if [ -f /tmp/cache/webapi.tar.gz ]; then
              pigz -d --stdout /tmp/cache/webapi.tar.gz | docker load
            fi
            docker images
      
      - run:
          name: Build Docker image
          no_output_timeout: 60m
          command: |
            # Build docker image
            THISVERSION=0
            e=1 && for i in {1..5}; do
              docker build \
                --cache-from=tspisak/rpn-signature \
                --rm=false \
                -t tspisak/rpn-signature:unstable \
                --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
                --build-arg VCS_REF=`git rev-parse --short HEAD` \
                --build-arg VERSION="${CIRCLE_TAG}" . \
              && e=0 && break || sleep 15
            done && [ "$e" -eq "0" ]
      - run:
          name: Docker save
          no_output_timeout: 40m
          command: |
            mkdir -p /tmp/cache
            docker save ubuntu:xenial-20161213 tspisak/rpn-signature:unstable \
              | pigz -2 -p 3 > /tmp/cache/docker.tar.gz
      - run:
          name: Deploy to Docker Hub
          no_output_timeout: 40m
          command: |
            docker login -u $DOCKER_USER -p $DOCKER_PASS
            docker push tspisak/rpn-signature:unstable
      - persist_to_workspace:
          root: /tmp
          paths:
            - cache/docker.tar.gz
            - cache/rpn-signature.tar.gz
            - src/rpn-signature

  update_cache:
    machine:
      # Ubuntu 14.04 with Docker 17.10.0-ce
      image: circleci/classic:201711-01
    working_directory: /tmp/src/rpn-signature
    steps:
      - attach_workspace:
          at: /tmp
      - save_cache:
         key: docker-v1-{{ .Branch }}-{{ epoch }}
         paths:
            - /tmp/cache/docker.tar.gz
            - /tmp/cache/rpn-signature.tar.gz

  deploy:
    machine:
      image: circleci/classic:201711-01
    working_directory: /tmp/src/rpn-signature
    steps:
      - attach_workspace:
          at: /tmp
      - run:
          name: Load Docker image layer cache
          no_output_timeout: 30m
          command: |
            docker info
            set +o pipefail
            if [ -f /tmp/cache/docker.tar.gz ]; then
              sudo apt update && sudo apt -y install pigz
              pigz -d --stdout /tmp/cache/docker.tar.gz | docker load
              docker images
            fi
      - run:
          name: Deploy to Docker Hub
          no_output_timeout: 40m
          command: |
            if [[ -n "$CIRCLE_TAG" ]]; then
              docker login -u $DOCKER_USER -p $DOCKER_PASS
              docker tag tspisak/rpn-signature:unstable tspisak/rpn-signature:latest
              docker push tspisak/rpn-signature:latest
              docker tag tspisak/rpn-signature:latest tspisak/rpn-signature:$CIRCLE_TAG
              docker push tspisak/rpn-signature:$CIRCLE_TAG
            fi
            
workflows:
  version: 2
  build_test_deploy:
    jobs:
      - build:
          filters:
            tags:
              only: /.*/

      - update_cache:
          requires:
            - build
          filters:
            branches:
              ignore: /docs?\/.*/
            tags:
              only: /.*/

      - deploy:
          requires:
            - build
          filters:
            tags:
              only: /^v.*/