ci.yml

name: CI

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

jobs:
  generate-matrix:
    name: "Generate matrix from cabal"
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - name: Checkout base repo
        uses: actions/checkout@v3
      - name: Extract the tested GHC versions
        id: set-matrix
        run: |
          wget https://github.com/Kleidukos/get-tested/releases/download/v0.1.5.0/get-tested-0.1.5.0-linux-amd64 -O get-tested
          chmod +x get-tested
          ./get-tested --ubuntu --macos get-tested.cabal >> $GITHUB_OUTPUT
  tests:
    name: ${{ matrix.ghc }} on ${{ matrix.os }}
    needs: generate-matrix
    runs-on: ${{ matrix.os }}
    strategy:
      matrix: ${{ fromJSON(needs.generate-matrix.outputs.matrix) }}
    steps:
      - name: Checkout base repo
        uses: actions/checkout@v3
      - name: Set up Haskell
        id: setup-haskell
        uses: haskell/actions/setup@v1
        with:
          ghc-version: ${{ matrix.ghc }}
          cabal-version: 'latest'
      - name: Configure
        run: cabal new-configure --enable-tests
      - name: Freeze
        run: cabal freeze
      - name: Cache
        uses: actions/cache@v2.1.3
        with:
          path: ${{ steps.setup-haskell.outputs.cabal-store }}
          key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
          restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-
      - name: Build
        run: cabal new-build
      - name: Test
        run: cabal new-test all