name: CI

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

jobs:
  stack:
    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macOS-latest, windows-latest]
        stack: ["2.5.1"]
        ghc: ["8.6.5", "8.8.4", "8.10.3", "9.0.1"]

    steps:
    - uses: actions/checkout@v2
      if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'

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

    - uses: actions/cache@v2.1.4
      name: Cache ~/.stack
      with:
        path: ~/.stack
        key: ${{ runner.os }}-${{ matrix.ghc }}-stack

    - name: Build
      run: |
        stack build duckling:lib --system-ghc --test --bench --no-run-tests --no-run-benchmarks

    - name: Test
      run: |
        stack test --system-ghc