name: CI

on:
  workflow_dispatch:
  pull_request:
    types: [synchronize, opened, reopened]
  push:
    branches: [main]
  schedule:
    # additionally run once per week (At 00:00 on Sunday) to maintain cache
    - cron: '0 0 * * 0'

jobs:
  cabal:
    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest]
        cabal: ["3.6.2.0"]
        ghc:
          - "9.0.2"

    steps:
    - uses: actions/checkout@v2

    - uses: haskell/actions/setup@v1.2
      id: setup-haskell-cabal
      name: Setup Haskell
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    - name: Configure
      run: |
        cabal configure -O0 --enable-tests --enable-benchmarks --enable-documentation --test-show-details=direct --write-ghc-environment-files=always

    - name: Freeze
      run: |
        cabal freeze

    - uses: actions/cache@v2
      name: Cache ~/.cabal/store
      with:
        path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
        key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}-1

    - name: Install dependencies
      run: |
        cabal build all --only-dependencies

    - name: Build
      run: |
        cabal build all

    - name: Test
      run: |
        cabal test all

    - name: Documentation
      run: |
        cabal haddock