name: CI

# Trigger the workflow on push or pull request, but only for the master branch
on:
  pull_request:
  push:
    branches: ["ghc-9.2"]

jobs:
  cabal:
    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest]
        cabal: ["3.6"]
        ghc:
          - "9.2.2"

    steps:
    - uses: actions/checkout@v3

    - uses: haskell/actions/setup@v2
      id: setup-haskell-cabal
      name: Setup Haskell
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    # GitHub preinstalls recent GHC versions, and haskell/actions/setup uses the
    # preinstalled version when possible. However, GitHub's preinstalled GHC does
    # not include documentation, and we need documentation to run Haddock tests.
    # Therefore, we reinstall GHC to ensure that we have the documentation we
    # need.
    - name: Reinstall GHC with docs
      run: |
        if [[ ! -e ~/.ghcup/ghc/${{ matrix.ghc }}/share/doc ]]; then
          ghcup install ghc --force ${{ matrix.ghc }} --set
        fi

    - name: Setup
      run: |
        cabal configure --with-compiler ghc-${{ matrix.ghc }} --enable-tests --enable-benchmarks --test-show-details=direct
        cabal freeze

    - uses: actions/cache@v2
      name: Cache ~/.cabal/store
      with:
        path: |
          ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
          dist-newstyle
        key: ${{ runner.os }}-${{ 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