name: Haskell CI (PRs)

on:
  pull_request:
    branches: [ master ]
  workflow_dispatch:

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        cabal: ["3.2"]
        ghc: ["8.4", "8.6", "8.8.3", "8.10"]
    env:
      CONFIG: "--enable-tests --enable-benchmarks -fall_extensions"

    steps:
    - uses: actions/checkout@v2
    - uses: actions/setup-haskell@v1
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    - name: Cache
      uses: actions/cache@v1
      env:
        cache-name: cache-cabal
      with:
        path: ~/.cabal
        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/*.cabal') }}-${{ hashFiles('**/cabal.project') }}
        restore-keys: |
          ${{ runner.os }}-build-${{ env.cache-name }}-
          ${{ runner.os }}-build-
          ${{ runner.os }}-

    - name: Install packages
      run: |
        sudo apt-get install -y xorg-dev
        sudo apt-get install -y libasound2-dev libxpm-dev libmpd-dev libxrandr-dev
        sudo apt-get install -y happy c2hs hspec-discover

    - name: Install dependencies
      run: |
        cabal update
        cabal build --dependencies-only $CONFIG

    - name: Build
      run: cabal build $CONFIG

    - name: Run hlint
      run: |
        wget https://raw.github.com/ndmitchell/hlint/master/misc/travis.sh
        sh ./travis.sh src
    - name: Run tests
      run: cabal test