name: Haskell CI

on: [pull_request]

jobs:
  build:
    name: ghc ${{ matrix.ghc }}
    runs-on: ubuntu-16.04
    strategy:
      matrix:
        ghc: ["8.2.2", "8.4.4", "8.6.5", "8.8.1"]
        cabal: ["latest"]

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

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

    - name: Install dependencies
      run: |
        cabal v2-update
        cabal v2-configure --enable-tests --write-ghc-environment-files=always -j2
        cabal v2-build --only-dependencies

    - name: Build & test
      run: |
        cabal v2-build
        cabal v2-test
        cabal v2-haddock
        cabal v2-sdist
        cabal check