version: 2.1

orbs:
  docker: circleci/docker@1.0.1

commands:
  docker-build:
    description: |
      Build a Docker image
    parameters:
      dockerfile:
        default: Dockerfile
        description: |
          Name of dockerfile to use, defaults to Dockerfile
        type: string
      extra_build_args:
        default: ''
        description: >
          Extra flags to pass to docker build. For examples, see
          https://docs.docker.com/engine/reference/commandline/build
        type: string
      registry:
        default: docker.io
        description: |
          Comma separated list of registry to use, defaults to docker.io
        type: string
      image:
        default: cdalvaro/saltstack-master
        description: |
          Name of image to build
        type: string
      tag:
        default: ${CIRCLE_SHA1}
        description: |
          Image tag, defaults to the value of $CIRCLE_SHA1
        type: string
      path:
        default: .
        description: |
          Path to the directory containing your Dockerfile and build context,
          defaults to . (working directory)
        type: string
      cache_from:
        default: ''
        description: |
          Comma-separated list of images. Images will first be pulled, then passed
          as the --cache-from build argument
          https://docs.docker.com/engine/reference/commandline/build/
        type: string
      no_output_timeout:
        default: 10m
        description: |
          No output timeout for build step
        type: string
    steps:
      - when:
          condition: <<parameters.cache_from>>
          steps:
            - run:
                name: Build image for <<parameters.registry>>
                no_output_timeout: <<parameters.no_output_timeout>>
                command: >
                  echo "<<parameters.cache_from>>" | sed -n 1'p' | tr ',' '\n' |
                  while read image; do
                    echo "Pulling ${image} ...";
                    docker pull "${image}" || true
                  done

                  docker_tag_args=""

                  IFS="," read -ra DOCKER_REGISTRIES \<<< "<<parameters.registry>>"

                  for registry in "${DOCKER_REGISTRIES[@]}"; do
                    IFS="," read -ra DOCKER_TAGS \<<< "<<parameters.tag>>"

                    for tag in "${DOCKER_TAGS[@]}"; do
                      docker_tag_args="${docker_tag_args} -t ${registry}/<<parameters.image>>:${tag}"
                    done
                  done

                  docker build
                  <<#parameters.extra_build_args>><<parameters.extra_build_args>><</parameters.extra_build_args>>
                  \
                    --cache-from <<parameters.cache_from>> \
                    -f <<parameters.path>>/<<parameters.dockerfile>> \
                    ${docker_tag_args} \
                    <<parameters.path>>
      - unless:
          condition: <<parameters.cache_from>>
          steps:
            - run:
                name: Building image for <<parameters.registry>>
                no_output_timeout: <<parameters.no_output_timeout>>
                command: >
                  docker_tag_args=""

                  IFS="," read -ra DOCKER_REGISTRIES \<<< "<<parameters.registry>>"

                  for registry in "${DOCKER_REGISTRIES[@]}"; do
                    IFS="," read -ra DOCKER_TAGS \<<< "<<parameters.tag>>"

                    for tag in "${DOCKER_TAGS[@]}"; do
                      docker_tag_args="${docker_tag_args} -t ${registry}/<<parameters.image>>:${tag}"
                    done
                  done

                  docker build
                  <<#parameters.extra_build_args>><<parameters.extra_build_args>><</parameters.extra_build_args>>
                  \
                    -f <<parameters.path>>/<<parameters.dockerfile>> \
                    ${docker_tag_args} \
                    <<parameters.path>>

  docker-save:
    description: |
      Save one or more images to a tar archive
    parameters:
      registry:
        default: docker.io
        description: |
          Comma separated list of registry to use, defaults to docker.io
        type: string
      image:
        description: |
          Name of image to save
        type: string
      tag:
        default: ${CIRCLE_SHA1}
        description: |
          Image tag, defaults to the value of $CIRCLE_SHA1
        type: string
    steps:
      - run:
          name: Save image to tar archive
          command: >
            docker_images=""

            IFS="," read -ra DOCKER_REGISTRIES \<<< "<<parameters.registry>>"

            for registry in "${DOCKER_REGISTRIES[@]}"; do
              IFS="," read -ra DOCKER_TAGS \<<< "<<parameters.tag>>"

              for tag in "${DOCKER_TAGS[@]}"; do
                docker_images="${docker_images} ${registry}/<<parameters.image>>:${tag}"
              done
            done

            mkdir -p ~/docker/

            docker save -o ~/docker/docker-images.tar ${docker_images}
      - persist_to_workspace:
          root: ~/
          paths:
            - docker

  docker-load:
    description: |
      Load tar archive
    steps:
      - attach_workspace:
          at: ~/
      - run:
          name: Load images from tar archive
          command: >
            docker load -i ~/docker/docker-images.tar

jobs:
  build:
    executor: docker/machine
    steps:
      - checkout
      - docker-build:
          registry: docker.io,quay.io
          image: cdalvaro/saltstack-master
          tag: ${CIRCLE_TAG:-latest}
          cache_from: docker.io/cdalvaro/saltstack-master:latest
          extra_build_args: '--build-arg VCS_REF=${CIRCLE_TAG:-${CIRCLE_SHA1}} --build-arg BUILD_DATE="$(date +"%Y-%m-%d %H:%M:%S%:z")"'
          no_output_timeout: 45m
      - docker-save:
          registry: docker.io,quay.io
          image: cdalvaro/saltstack-master
          tag: ${CIRCLE_TAG:-latest}

  test:
    executor: docker/machine
    steps:
      - checkout
      - docker-load
      - run:
          name: Launch docker container
          command: docker run -it --rm -d --name salt_master cdalvaro/saltstack-master:${CIRCLE_TAG:-latest}
      - run:
          name: Container info
          command: docker container ls
      - run:
          name: Wait for salt-master bootup
          command: sleep 60
      - run:
          name: Test image bootup
          command: docker exec -it salt_master /usr/local/bin/healthcheck

workflows:
  build-and-test:
    jobs:
      - build:
          filters:
            tags:
              only: /^[0-9._]+$/
      - test:
          requires:
            - build
          filters:
            tags:
              only: /^[0-9._]+$/