version: 2.1

orbs:
  slack: circleci/slack@3.4.2

references:
  images:
    middleman: &MIDDLEMAN_IMAGE docker.mirror.hashicorp.services/hashicorp/middleman-hashicorp:0.3.44

executors:
  go:
    docker:
      - image: docker.mirror.hashicorp.services/circleci/golang:1.16
    environment:
      CONSUL_VERSION: 1.7.2
      GOMAXPROCS: 4
      GO111MODULE: "on"
      GOPROXY: https://proxy.golang.org/
      TEST_RESULTS_DIR: &TEST_RESULTS_DIR /tmp/test-results
      ARTIFACTS_DIR: &ARTIFACTS_DIR /tmp/artifacts

jobs:
  go-checks:
    executor:
      name: go
    steps:
      - checkout
      - run: go mod verify
      - run: make fmtcheck generate
      - run:
          name: verify no code was generated
          command: |
            if [[ -z $(git status --porcelain) ]]; then
              echo "Git directory is clean."
            else
              echo "Git is dirty. Run `make fmtcheck` and `make generate` locally and commit any formatting fixes or generated code."
              git status --porcelain
              exit 1
            fi

  go-test:
    executor:
      name: go
    environment:
      TF_CONSUL_TEST: 1
    parallelism: 4
    steps:
      - checkout
      - attach_workspace:
          at: .
      - run:
          name: install consul
          command: |
            curl -sLo consul.zip https://releases.hashicorp.com/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_linux_amd64.zip
            unzip consul.zip
            mkdir -p ~/bin
            mv consul ~/bin
            echo 'export PATH="~/bin:$PATH"'
      - run: mkdir -p $TEST_RESULTS_DIR
      - run:
          name: Run Go Tests
          command: |
            PACKAGE_NAMES=$(go list ./... | circleci tests split --split-by=timings --timings-type=classname)
            echo "Running $(echo $PACKAGE_NAMES | wc -w) packages"
            echo $PACKAGE_NAMES
            gotestsum --format=short-verbose --junitfile $TEST_RESULTS_DIR/gotestsum-report.xml -- -p 2 -cover -coverprofile=cov_$CIRCLE_NODE_INDEX.part $PACKAGE_NAMES

      # save coverage report parts
      - persist_to_workspace:
          root: .
          paths:
            - cov_*.part

      - store_test_results:
          path: *TEST_RESULTS_DIR
      - store_artifacts:
          path: *TEST_RESULTS_DIR

      - slack/status:
          fail_only: true
          only_for_branches: main

  go-test-e2e:
    executor:
      name: go
    environment:
      TF_ACC: 1
    steps:
      - checkout
      - attach_workspace:
          at: .
      - run: mkdir -p $TEST_RESULTS_DIR
      - run:
          name: Run Go E2E Tests
          command: |
            gotestsum --format=short-verbose --junitfile $TEST_RESULTS_DIR/gotestsum-report.xml -- -p 2 -cover -coverprofile=cov_e2e.part ./command/e2etest ./tools/terraform-bundle/e2etest

      # save coverage report parts
      - persist_to_workspace:
          root: .
          paths:
            - cov_*.part

      - store_test_results:
          path: *TEST_RESULTS_DIR
      - store_artifacts:
          path: *TEST_RESULTS_DIR

      - slack/status:
          fail_only: true
          only_for_branches: main

  # combine code coverage results from the parallel circleci executors
  coverage-merge:
    executor:
      name: go
    steps:
      - checkout
      - attach_workspace:
          at: .
      - run: mkdir -p $TEST_RESULTS_DIR
      - run:
          name: merge coverage reports
          command: |
            echo "mode: set" > coverage.out
            grep -h -v "mode: set" cov_*.part >> coverage.out
            go tool cover -html=coverage.out -o $TEST_RESULTS_DIR/coverage.html
      - run:
          name: codecov upload
          command: bash <(curl -s https://codecov.io/bash) -v -C $CIRCLE_SHA1
      - store_artifacts:
          path: *TEST_RESULTS_DIR

  # build all distros
  build-distros: &build-distros
    executor: go
    environment: &build-env
      TF_RELEASE: 1
    steps:
      - run: go get -u github.com/mitchellh/gox # go get gox before detecting go mod
      - checkout
      - run: ./scripts/build.sh
      - run: mkdir -p $ARTIFACTS_DIR
      - run: cp pkg/*.zip /tmp/artifacts
      # save dev build to CircleCI
      - store_artifacts:
          path: *ARTIFACTS_DIR

  # build all amd64 architecture supported OS binaries
  build-amd64:
    <<: *build-distros
    environment:
      <<: *build-env
      XC_OS: "darwin linux windows"
      XC_ARCH: "amd64"

  # build all arm architecture supported OS binaries
  build-arm:
    <<: *build-distros
    environment:
      <<: *build-env
      XC_OS: "linux"
      XC_ARCH: "arm"

  test-docker-full:
    executor:
      name: go
    steps:
      - checkout
      - setup_remote_docker
      - run:
          name: test docker build for 'full' image
          command: docker build -t test-docker-full .

  # Based on a similar job in terraform-website repo.
  website-link-check:
    docker:
      - image: *MIDDLEMAN_IMAGE
    steps:
      - checkout:
          path: terraform

      - run:
          name: Determine changed website files, if any
          working_directory: terraform
          command: |
            # Figure out what the current branch forked from. Compare against
            # main and the set of "vX.Y" branches, and choose whichever branch
            # we're the *fewest* commits ahead of.
            # The point here isn't to perfectly predict where this will be
            # merged; all we really care about is determining which commits are
            # *unique to this PR,* so we don't accidentally complain about
            # problems you had nothing to do with.
            PARENT_BRANCH=$(
              for br in $(git branch -rl --format='%(refname:short)' | grep -E '^origin/(main|v\d+\.\d+)$'); do
                new_commits=$(git rev-list --first-parent ^${br} HEAD | wc -l);
                echo "${br} ${new_commits}";
              done \
              | sort -n -k2 \
              | head -n1 \
              | awk '{print $1}';
            )
            echo "Checking current branch against: ${PARENT_BRANCH}"
            MERGE_BASE=$(git merge-base HEAD ${PARENT_BRANCH})
            git diff --name-only -z --diff-filter=AMRCT ${MERGE_BASE}..HEAD -- ./website/ > /tmp/changed-website-files.txt
              # --name-only: Return a list of affected files but don't show the changes.
              # -z: Make that a null-separated list (instead of newline-separated), and
              #     DON'T mangle non-ASCII characters.
              # --diff-filter=AMRCT: Only list files that were added, modified, renamed,
              #     copied, or had their type changed (file, symlink, etc.). In
              #     particular, we don't want to check deleted files.
              # ${MERGE_BASE}..HEAD: Only consider files that have
              #     changed since this branch diverged from its parent branch.
              # -- ./website/: Only consider files in the website directory.
            echo "Changed website files:"
            cat /tmp/changed-website-files.txt | tr '\0' '\n'
              # Need to use "tr" for display because it's a null-separated list.

      - run:
          name: Exit early if there's nothing to check
          command: |
            if [ ! -s /tmp/changed-website-files.txt ]; then
              circleci-agent step halt
            fi

      - run:
          name: Check out terraform-website repo
          command: git clone git@github.com:hashicorp/terraform-website.git

      - run:
          name: Use local checkout for terraform submodule, instead of cloning again
          working_directory: terraform-website
          command: |
            # Set submodule's URL to our existing checkout.
            # (Using `pwd` because git's behavior with strictly relative paths is unreliable.)
            git config --file=.gitmodules submodule.ext/terraform.url $(pwd)/../terraform/.git
            # Make it so `make sync` will grab our current branch instead of stable-website.
            git config --file=.gitmodules submodule.ext/terraform.branch HEAD

      - run:
          name: Init/update terraform-website submodules
          working_directory: terraform-website
          command: make sync

      - run:
          name: Set up terraform-website dependencies
          working_directory: terraform-website/content
          # If this does anything interesting, then the container needs an update.
          command: bundle check || bundle install --path vendor/bundle --retry=3

      - run:
          name: Run middleman in background
          working_directory: terraform-website/content
          background: true
          command: bundle exec middleman server

      - run:
          name: Wait for server to start
          command: until curl -sS http://localhost:4567/ > /dev/null; do sleep 1; done

      - run:
          name: Check links in changed pages
          working_directory: terraform-website/content
          command: cat /tmp/changed-website-files.txt | bundle exec ./scripts/check-pr-links.rb

workflows:
  version: 2
  test:
    jobs:
      - go-checks
      - go-test:
          requires:
            - go-checks
      - go-test-e2e:
          requires:
            - go-checks
      - coverage-merge:
          requires:
            - go-test
            - go-test-e2e
      - test-docker-full:
          filters:
            branches:
              only:
                - main
                - /^v\d+\.\d+$/ # v0.11, v0.12, etc.

  build-distros:
    jobs:
      - build-amd64
      - build-arm

  website-test:
    jobs:
      - website-link-check