haskell-ci.yml

name: CI

on:
  # Trigger the workflow on every pull request...
  pull_request:
    branches:
      - master
  # ...and when the main branch is updated.
  push:
    branches:
      - master
  # Build _at least_ once per month to actively check for regressions.
  schedule:
    - cron: '0 0 1 * *'

jobs:
  cabal:
    name: ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    # Not buildable ATM but it's good to keep an eye on it
    continue-on-error: ${{ matrix.ghc == '9.0.1' }}
    strategy:
      matrix:
        os:
          - ubuntu-latest
        # Check the last 3 (or so) major GHC releases; no need to waste compute.
        ghc:
          - 8.6.5
          - 8.8.4
          - 8.10.4
          - 9.0.1
        cabal:
          - latest

    steps:
      - uses: actions/checkout@v2

      - uses: haskell/actions/setup@v1
        id: setup-haskell-cabal
        name: Setup Cabal
        with:
          ghc-version: ${{ matrix.ghc }}
          cabal-version: ${{ matrix.cabal }}

      # Regenerate the freeze file on each run to ensure that `cabal-install`
      # always builds against the latest dependencies.
      - name: Freeze
        run: |
          cabal configure --enable-tests --enable-benchmarks --test-show-details=direct
          cabal freeze

      - uses: actions/cache@v2
        name: Cache Cabal Artifacts
        with:
          path: |
            ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
            dist-newstyle
          key: ${{ runner.os }}-cabal-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
          restore-keys: ${{ runner.os }}-cabal-${{ matrix.ghc }}-

      - name: Build
        run: |
          cabal build all

      - name: Test
        run: |
          cabal test all

      - name: Generate Documentation
        run: |
          cabal haddock all

  stack:
    name: stack ${{ matrix.name }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os:
          - ubuntu-latest
        name:
          - nightly
          - lts16
          - lts17
        include:
          # Check that the build passes with the nightly snapshot.
          - name: 'nightly'
            stack_yaml: 'stack.yaml'
          # Check that the build passes with the latest LTS snapshot.
          - name: 'lts16'
            stack_yaml: 'stack-lts16.yaml'
          # Check that the build passes with the latest LTS snapshot.
          - name: 'lts17'
            stack_yaml: 'stack-lts17.yaml'

    steps:
      - uses: actions/checkout@v2

      - uses: actions/cache@v2
        name: Cache Stack Artifacts
        with:
          path: |
            ~/.stack
            .stack-work
          key: ${{ runner.os }}-stack-${{ matrix.stack_yaml }}-${{ hashFiles(matrix.stack_yaml) }}
          restore-keys: ${{ runner.os }}-stack-${{ matrix.stack_yaml }}-

      - uses: haskell/actions/setup@v1
        name: Stack Setup
        with:
          enable-stack: true
          stack-no-global: true
          stack-setup-ghc: true

      - name: Build
        run: |
          stack --stack-yaml=${{ matrix.stack_yaml }} build --test --bench --no-run-tests --no-run-benchmarks

      - name: Test
        run: |
          stack --stack-yaml=${{ matrix.stack_yaml }} test