version: 2.1

jobs:
  run-static-analysis:
    parameters:
      version:
        type: string
    docker:
      - image: circleci/golang:<< parameters.version >>
        environment:
          GO111MODULE: "on"
    # 1CPU / 2GB RAM
    resource_class: small
    steps:

      - checkout

      - restore_cache:
          keys:
            - go-<< parameters.version >>-{{ checksum "go.sum" }}-{{ checksum "Makefile" }}

      - run: make bootstrap

      - save_cache:
          key: go-<< parameters.version >>-{{ checksum "go.sum" }}-{{ checksum "Makefile" }}
          paths:
            - "/go/pkg/mod"
            - ".tmp"

      - run:
          name: run static analysis
          command: make lint

  run-tests:
    parameters:
      version:
        type: string
    docker:
      - image: circleci/golang:<< parameters.version >>
        environment:
          GO111MODULE: "on"
    # 1CPU / 2GB RAM
    resource_class: small
    steps:

      - checkout

      - restore_cache:
          keys:
            - go-<< parameters.version >>-{{ checksum "go.sum" }}-{{ checksum "Makefile" }}

      - run: make bootstrap

      - save_cache:
          key: go-<< parameters.version >>-{{ checksum "go.sum" }}-{{ checksum "Makefile" }}
          paths:
            - "/go/pkg/mod"
            - ".tmp"

      - setup_remote_docker:
          version: 18.06.0-ce

      - run:
          name: enable docker client
          command: |
              # all of this to enable "circleci local execute ..." cli commands for /var/run/docker.sock
              mkdir -p ${HOME}/.local/bin
              cat \<< EOF > ${HOME}/.local/bin/docker
              #!/bin/bash
              set -xue
              sudo -E ${HOME}/.local/bin/docker.bin \$@
              EOF
              sudo mv /usr/bin/docker ${HOME}/.local/bin/docker.bin
              chmod 755 ${HOME}/.local/bin/docker

      - run:
          name: run unit tests
          command: make unit

      - run:
          name: build hash key for tar cache
          command: find integration/test-fixtures/image-* -type f -exec md5sum {} + | awk '{print $1}' | sort | md5sum | tee integration/test-fixtures/tar-cache.key

      - restore_cache:
          keys:
            - integration-test-tar-cache-{{ checksum "integration/test-fixtures/tar-cache.key" }}
      - run:
          name: run integration tests
          command: |
            docker version
            make integration

      - save_cache:
          key: integration-test-tar-cache-{{ checksum "integration/test-fixtures/tar-cache.key" }}
          paths:
            - "integration/test-fixtures/tar-cache"

workflows:
  "Static Analysis & All Tests":
    jobs:
      - run-static-analysis:
          name: "Static Analysis"
          version: "1.14"
      - run-tests:
          name: "Unit & Integration Tests (go-1.13)"
          version: "1.13"
      - run-tests:
          name: "Unit & Integration Tests (go-latest)"
          version: "latest"