version: 2
jobs:
  build: # runs not using Workflows must have a `build` job as entry point
    docker:
      - image: circleci/golang

    environment: # environment variables for the build itself
      GOPATH: /go
      TEST_RESULTS: /tmp/test-results
      COVER_PROFILE: /tmp/coverage.out

    steps: # steps that comprise the `build` job
      - checkout # check out source code to working directory
      - run: mkdir -p $TEST_RESULTS # create the test results directory

      - restore_cache: # restores saved cache if no changes are detected since last run
          keys:
            - v1-pkg-cache

      - run:
          name: Load dependencies
          command: go get github.com/mattn/goveralls && go get github.com/go-ini/ini && go get gopkg.in/yaml.v2
      - run:
          name: Load nix-amer
          command: go get github.com/xdrm-brackets/nix-amer
      - run:
          name: Unit tests
          command: go test -v -cover -race -coverprofile=$COVER_PROFILE github.com/xdrm-brackets/nix-amer/...
      - run:
          name: Update coveralls.io
          command: /go/bin/goveralls -coverprofile=$COVER_PROFILE -service=circle-ci -repotoken=$COVERALLS_TOKEN

      - store_artifacts: # Upload test summary for display in Artifacts
          path: /tmp/test-results
          destination: raw-test-output

      - store_test_results: # Upload test results for display in Test Summary
          path: /tmp/test-results