name: CI

# Trigger the workflow on push or pull request, but only for the master branch
on:
  pull_request:
  push:
    branches: [master]

jobs:
  cabal:
    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    env:
      # Workaround for actions/setup-haskell@1.1.3 on Windows: https://github.com/actions/runner/pull/779
      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
    strategy:
      matrix:
        os: [ubuntu-latest, macOS-latest, windows-latest]
        cabal: ["3.2"]
        ghc:
          - "8.6.5"
          - "8.8.3"
          - "8.10.1"
        exclude:
          - os: macOS-latest
            ghc: 8.8.3
          - os: macOS-latest
            ghc: 8.6.5
          - os: windows-latest
            ghc: 8.8.3
          - os: windows-latest
            ghc: 8.6.5

    steps:
    - uses: actions/checkout@v2
      if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'

    - uses: actions/setup-haskell@v1.1.3
      id: setup-haskell-cabal
      name: Setup Haskell
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    - name: Freeze
      run: |
        cabal freeze

    - uses: actions/cache@v1
      name: Cache ~/.cabal/store
      with:
        path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
        key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}

    - name: Build
      run: |
        cabal configure --enable-tests --enable-benchmarks --test-show-details=direct
        cabal build all

    - name: Test
      run: |
        cabal test all

  stack:
    name: stack / ghc ${{ matrix.ghc }}
    runs-on: ubuntu-latest
    strategy:
      matrix:
        stack: ["2.3.1"]
        ghc: ["8.8.3"]

    steps:
    - uses: actions/checkout@v2
      if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'

    - uses: actions/setup-haskell@v1.1.3
      name: Setup Haskell Stack
      with:
        ghc-version: ${{ matrix.ghc }}
        stack-version: ${{ matrix.stack }}

    - uses: actions/cache@v1
      name: Cache ~/.stack
      with:
        path: ~/.stack
        key: ${{ runner.os }}-${{ matrix.ghc }}-stack

    - name: Build
      run: |
        stack build --system-ghc --test --bench --no-run-tests --no-run-benchmarks

    - name: Test
      run: |
        stack test --system-ghc