loki/.circleci/config.yml

version: 2

.tags: &tags # tags need to be explicitely defined (whitelist)
  tags: {only: "/.*/"}

.only-tags: &only-tags
  <<: *tags
  branches: { ignore: "/.*/" }

.tag-or-master: &tag-or-master
  branches: { only: master }
  <<: *tags

.no-master: &no-master # contrary to tags, the branches must be excluded (blacklist)
  branches: { ignore: master }

workflows:
  version: 2
  default:
    jobs:
      # publish jobs depend on this as well,
      # thus tags need to be allowed for these
      - test: {filters: {<<: *tags}}

      - build/promtail-windows:
          requires: [ test ]

      - build/docker-driver:
          requires: [ test ]
          filters: {<<: *no-master}
      - publish/docker-driver:
          requires: [ test ]
          filters: { <<: *tag-or-master }

      - publish/binaries:
          requires: [ test ]
          filters: { <<: *only-tags }

      - test-helm:
          requires: [ test ]
          filters: {<<: *tags}
      - publish-helm:
          requires: [ test-helm ]
          filters: {<<: *tag-or-master}


# https://circleci.com/blog/circleci-hacks-reuse-yaml-in-your-circleci-config-with-yaml/
.defaults: &defaults
  docker:
    - image: grafana/loki-build-image:0.9.1
  working_directory: /src/loki

jobs:
  test:
    <<: *defaults
    steps:
      - checkout
      - run:
          name: Unit Tests
          command: make BUILD_IN_CONTAINER=false test
      - run:
          name: Upload Codecov
          command: |
                        bash <(curl -s https://codecov.io/bash)

  # Promtail
  build/promtail-windows:
    <<: *defaults
    steps:
      - checkout
      - setup_remote_docker
      - run:
          name: touch-protos
          command: make touch-protos
      - run:
          name: build
          command: make GOOS=windows GOGC=10 promtail

  # Docker driver
  build/docker-driver:
    <<: *defaults
    steps:
      - checkout
      - setup_remote_docker
      - run:
          name: docker-driver
          command: make docker-driver

  publish/docker-driver:
    <<: *defaults
    steps:
      - checkout
      - setup_remote_docker
      - run:
          name: login
          command: docker login -u "$DOCKER_USER" -p "$DOCKER_PASS"
      - run:
          name: docker-driver
          command: make docker-driver-push

  publish/binaries:
    <<: *defaults
    steps:
      - checkout
      - run:
          name: github release
          command: make BUILD_IN_CONTAINER=false publish

  test-helm:
    environment:
      CT_VERSION: 2.3.3
    machine:
      image: ubuntu-1604:201903-01
    steps:
      - checkout
      - run:
          name: Install k3s
          command: |
            curl -sfL https://get.k3s.io | sh -
            sudo chmod 755 /etc/rancher/k3s/k3s.yaml
            mkdir -p ~/.kube
            cp /etc/rancher/k3s/k3s.yaml ~/.kube/config            
      - run:
          name: Install Helm
          command: |
            curl -L https://git.io/get_helm.sh | bash
            kubectl apply -f tools/helm.yaml
            helm init --service-account helm --wait            
      - run:
          name: Install Chart Testing tool
          command: |
            pip install yamale yamllint
            curl -Lo ct.tgz https://github.com/helm/chart-testing/releases/download/v${CT_VERSION}/chart-testing_${CT_VERSION}_linux_amd64.tar.gz
            sudo tar -C /usr/local/bin -xvf ct.tgz
            sudo mv /usr/local/bin/etc /etc/ct/            
      - run:
          name: Run Chart Tests
          command: |
            ct lint --chart-dirs=production/helm --check-version-increment=false --validate-maintainers=false
            ct install --build-id=${CIRCLE_BUILD_NUM} --charts production/helm/loki-stack            

  publish-helm:
    <<: *defaults
    steps:
      - add_ssh_keys:
          fingerprints:
            - "5a:d3:08:5e:f7:53:a0:c4:e9:5d:83:c6:02:6a:d9:bd"
      - checkout
      - run: make helm-publish