version: 2.1

executors:
  go:
    docker:
      - image: circleci/golang:latest
    working_directory: ~/repo

workflows:
  version: 2
  ci:
    jobs:
      - checkout:
          filters:
            branches:
              only: /.*/
            tags:
              only: /.*/
      - linting:
          requires:
            - checkout
          filters:
            branches:
              only: /.*/
            tags:
              only: /.*/
      - testing:
          requires:
            - checkout
          filters:
            branches:
              only: /.*/
            tags:
              only: /.*/
      - build:
          requires:
            - testing
            - linting
          filters:
            tags:
              ignore: /^v[0-9]+(\.[0-9]+)*$/
            branches:
              only: /.*/
      - publishing:
          requires:
            - testing
            - linting
          filters:
            branches:
              ignore: /.*/
            tags:
              only: /^v[0-9]+(\.[0-9]+)*$/
jobs:
  checkout:
    executor: go
    steps:
      - checkout
      - persist_to_workspace:
          paths:
            - .
          root: ~/repo
  linting:
    executor: go
    steps:
      - attach_workspace:
          at: .
      - run: go build .
      - run: go get -u golang.org/x/lint/golint
      - run: golint -set_exit_status ./... 
  testing:
    executor: go
    steps:
      - attach_workspace:
          at: .
      - run: mkdir -p /tmp/test-results
      - run: go build ./...
      - run: go get gotest.tools/gotestsum
      - run: gotestsum --junitfile /tmp/test-results/unit-tests.xml
      - store_test_results:
          path: /tmp/test-results
  build:
    executor: go
    steps:
      - attach_workspace:
          at: .
      - setup_remote_docker
      - run:
          name: Install Goreleaser
          command: |
            cd .. && \
            wget https://github.com/goreleaser/goreleaser/releases/download/v0.104.1/goreleaser_Linux_x86_64.tar.gz && \
            tar -xvf goreleaser_Linux_x86_64.tar.gz && \
            ./goreleaser -v
      - run: 
          name: Execute goreleaser
          command: CGO_ENABLED=${CGO_ENABLED:-0} ../goreleaser --snapshot --skip-publish --debug
  publishing:
    executor: go
    steps:
      - attach_workspace:
          at: .
      - setup_remote_docker
      - run:
          name: Install Goreleaser
          command: |
            cd .. && \
            wget https://github.com/goreleaser/goreleaser/releases/download/v0.104.1/goreleaser_Linux_x86_64.tar.gz && \
            tar -xvf goreleaser_Linux_x86_64.tar.gz && \
            ./goreleaser -v
      - run:
          name: Login to docker hub
          command: |
            echo "$DOCKER_PASS" | docker login -u $DOCKER_USER --password-stdin 
      - run: 
          name: Execute goreleaser
          command: CGO_ENABLED=${CGO_ENABLED:-0} ../goreleaser --debug