---
version: 2.0

references:
  stack_build: &stack_build
    docker:
      - image: fpco/stack-build:lts
    steps:
      - checkout
      - run:
          name: Digest
          command: |
            echo -- "$STACK_ARGUMENTS" > rdigest
            git ls-files | xargs md5sum > sdigest
      - restore_cache:
          keys:
            # yamllint disable-line rule:line-length
            - stack-{{ .Branch }}-{{ checksum "rdigest" }}-{{ checksum "sdigest" }}
            - stack-{{ .Branch }}-{{ checksum "rdigest" }}-
            - stack-{{ .Branch }}-
            - stack-
      - run:
          name: Dependencies
          command: make setup
      - run:
          name: Build
          command: make build
      - save_cache:
          # yamllint disable-line rule:line-length
          key: stack-{{ .Branch }}-{{ checksum "rdigest" }}-{{ checksum "sdigest" }}
          paths:
            - ~/.stack
            - ./.stack-work
      - run:
          name: Test
          command: make test
      - run:
          name: Lint
          command: make lint

jobs:
  build_7.10.3:
    <<: *stack_build
    environment:
      STACK_ARGUMENTS: --resolver lts-6.35
  build_8.0.2:
    <<: *stack_build
    environment:
      STACK_ARGUMENTS: --resolver lts-9.21
  build_8.2.2:
    <<: *stack_build
    environment:
      STACK_ARGUMENTS: --resolver lts-10.3
  build_nightly:
    <<: *stack_build
    environment:
      STACK_ARGUMENTS: --resolver nightly

workflows:
  version: 2
  builds:
    jobs:
      - build_7.10.3
      - build_8.0.2
      - build_8.2.2
      - build_nightly