version: 2

jobs:
  # Make sure that there are no outstanding linting hints and that
  # auto-formatting does not result in any changes.
  style-check:
    docker:
      - image: nixos/nix:2.3
    steps:
      - checkout
      - run:
          name: Install linting and styling scripts
          command: nix-env -f default.nix -iA style
      - run:
          name: Run linter
          command: |
            # Note: For checking this locally, use `nix-shell --run postgrest-lint`
            postgrest-lint
      - run:
          name: Run style check
          command: |
            # 'Note: For checking this locally, use `nix-shell --run postgrest-style`
            postgrest-style-check

  # Run tests based on stack and docker against the oldest PostgreSQL version
  # that we support.
  stack-test:
    docker:
      - image: cimg/base:2021.03
        environment:
          - PGHOST=localhost
      - image: circleci/postgres:9.5
        environment:
          - POSTGRES_USER=circleci
          - POSTGRES_DB=circleci
          - POSTGRES_HOST_AUTH_METHOD=trust
    steps:
      - checkout
      - restore_cache:
          keys:
          - v1-stack-dependencies-{{ checksum "postgrest.cabal" }}-{{ checksum "stack.yaml" }}
      - run:
          name: install stack & dependencies
          command: |
            curl -L https://github.com/commercialhaskell/stack/releases/download/v2.3.1/stack-2.3.1-linux-x86_64.tar.gz | tar zx -C /tmp
            sudo mv /tmp/stack-2.3.1-linux-x86_64/stack /usr/bin
            sudo apt-get update
            sudo apt-get install -y libgmp-dev postgresql-client
            sudo apt-get install -y --only-upgrade binutils
            stack setup
      - run:
          name: build src and tests dependencies
          command: |
            stack build --fast -j1 --only-dependencies
            stack build --fast --test --no-run-tests --only-dependencies
      - save_cache:
          paths:
            - "~/.stack"
            - ".stack-work"
          key: v1-stack-dependencies-{{ checksum "postgrest.cabal" }}-{{ checksum "stack.yaml" }}
      - run:
          name: build src and tests
          command: |
            stack build --fast -j1
            stack build --fast --test --no-run-tests
      - run:
          name: run spec tests
          command: |
            test/create_test_db "postgres://circleci@localhost" postgrest_test stack test
      - store_artifacts:
          path: /tmp/postgrest

  # Publish a new release. This only runs when a release is tagged (see
  # workflow below).
  release:
    machine: true
    steps:
      - checkout
      - run:
          name: Install Nix
          command: |
            curl -L https://nixos.org/nix/install | sh
            echo "source $HOME/.nix-profile/etc/profile.d/nix.sh" >> $BASH_ENV
      - run:
          name: Change postgrest.cabal if nightly
          command: |
            if test "$CIRCLE_TAG" = "nightly"
            then
              cabal_nightly_version=$(git show -s --format='%cd' --date='format:%Y%m%d')
              sed -i "s/^version:.*/version:$cabal_nightly_version/" postgrest.cabal
            fi
      - run:
          name: Install and use the Cachix binary cache
          command: |
            nix-env -iA cachix -f https://cachix.org/api/v1/install
            cachix use postgrest
      - run:
          name: Install release scripts
          command: nix-env -f default.nix -iA release
      - run:
          name: Publish GitHub release
          command: |
            export GITHUB_USERNAME="$CIRCLE_PROJECT_USERNAME"
            export GITHUB_REPONAME="$CIRCLE_PROJECT_REPONAME"
            postgrest-release-github $CIRCLE_TAG
      - run:
          name: Publish Docker images
          command: |
            export DOCKER_REPO=postgrest
            postgrest-release-docker-login
            postgrest-release-dockerhub $CIRCLE_TAG
            if test "$CIRCLE_TAG" != "nightly"
            then
              postgrest-release-dockerhub-description
            fi
      - store_artifacts:
          path: /tmp/postgrest

  # Build everything in default.nix and push to the Cachix binary cache if running on main
  nix-build:
    machine: true
    steps:
      - checkout
      - run:
          name: Install Nix
          command: |
            curl -L https://nixos.org/nix/install | sh
            echo "source $HOME/.nix-profile/etc/profile.d/nix.sh" >> $BASH_ENV
      - run:
          name: Install and use the Cachix binary cache
          command: |
            nix-env -iA cachix -f https://cachix.org/api/v1/install
            cachix use postgrest
      - run:
          name: Change postgrest.cabal if nightly
          command: |
            if test "$CIRCLE_TAG" = "nightly"
            then
              cabal_nightly_version=$(git show -s --format='%cd' --date='format:%Y%m%d')
              sed -i "s/^version:.*/version:$cabal_nightly_version/" postgrest.cabal
            fi
      - run:
          name: Build all derivations from default.nix and push results to Cachix
          command: |
            # Only push to the cache when CircleCI makes the CACHIX_SIGNING_KEY
            # available (e.g. not for pull requests).
            if [ -n "${CACHIX_AUTH_TOKEN:-""}" ]; then
              echo "Building and caching all derivations..."
              cachix authtoken "$CACHIX_AUTH_TOKEN"

              # Push new builds as we go
              nix-build | cachix push postgrest

              # Make sure that everything, including .drv files, is pushed
              nix-env -f default.nix -iA devTools
              postgrest-push-cachix
            else
              echo "Building all derivations (caching skipped for outside pull requests)..."
              nix-build
            fi
      - store_artifacts:
          path: /tmp/postgrest

  # Run tests
  nix-test:
    machine: true
    steps:
      - checkout
      - run:
          name: Install Nix
          command: |
            curl -L https://nixos.org/nix/install | sh
            echo "source $HOME/.nix-profile/etc/profile.d/nix.sh" >> $BASH_ENV
      - run:
          name: Install and use the Cachix binary cache
          command: |
            nix-env -iA cachix -f https://cachix.org/api/v1/install
            cachix use postgrest
      - run:
          name: Install testing scripts
          command: nix-env -f default.nix -iA tests memory withTools
      - run:
          name: Run coverage (io tests and spec tests against PostgreSQL 13)
          command: postgrest-coverage
          when: always
      - run:
          name: Skip tests on build or primary test failure
          command: circleci-agent step halt
          when: on_fail
      - run:
          name: Upload coverage to codecov
          command: |
            # Modified from:
            # https://docs.codecov.io/docs/about-the-codecov-bash-uploader#validating-the-bash-script
            curl -s https://codecov.io/bash > codecov;
            VERSION=$(grep 'VERSION=\".*\"' codecov | cut -d'"' -f2);
            shasum -a 512 -c <(curl -s https://raw.githubusercontent.com/codecov/codecov-bash/${VERSION}/SHA512SUM | grep codecov)
            bash codecov -f coverage/codecov.json
      - run:
          name: Run the spec tests against PostgreSQL 12
          command: postgrest-with-postgresql-12 postgrest-test-spec
          when: always
      - run:
          name: Run the spec tests against PostgreSQL 11
          command: postgrest-with-postgresql-11 postgrest-test-spec
          when: always
      - run:
          name: Run the spec tests against PostgreSQL 10
          command: postgrest-with-postgresql-10 postgrest-test-spec
          when: always
      - run:
          name: Run the spec tests against PostgreSQL 9.6
          command: postgrest-with-postgresql-9.6 postgrest-test-spec
          when: always
      - run:
          name: Run the spec tests against PostgreSQL 9.5
          command: postgrest-with-postgresql-9.5 postgrest-test-spec
          when: always
      - run:
          name: Check the spec tests for idempotence
          command: postgrest-test-spec-idempotence
          when: always
      - run:
          name: Run memory tests
          command: postgrest-test-memory
          when: always
      - store_artifacts:
          path: /tmp/postgrest

workflows:
  version: 2
  build-test-release:
    jobs:
      - style-check:
          # Make sure that this job also runs when releases are tagged.
          filters:
            tags:
              only:
                - /v[0-9]+(\.[0-9]+)*/
                - nightly
      - stack-test:
          filters:
            tags:
              only:
                - /v[0-9]+(\.[0-9]+)*/
                - nightly
      - nix-build:
          filters:
            tags:
              only:
                - /v[0-9]+(\.[0-9]+)*/
                - nightly
          context:
            - cachix
      - nix-test:
          filters:
            tags:
              only:
                - /v[0-9]+(\.[0-9]+)*/
                - nightly
      - release:
          requires:
            - style-check
            - stack-test
            - nix-build
            - nix-test
          filters:
            tags:
              only:
                - /v[0-9]+(\.[0-9]+)*/
                - nightly
            branches:
              ignore: /.*/
          context:
            - docker
            - github