ci.yml

name: CI

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

defaults:
  run:
    shell: bash

jobs:
  stack:
    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest]
        ghc:
          - "8.10"
          - "8.8"
          - "8.6"
        include:
          - os: macOS-latest
            ghc: "8.10"
          # - os: windows-latest
          #   ghc: "8.10"
    env:
      STACK_FLAGS: "--system-ghc --no-install-ghc --fast"

    steps:
    - uses: actions/checkout@v2

    - uses: actions/setup-haskell@v1.1
      with:
        enable-stack: true
        ghc-version: ${{ matrix.ghc }}

    - name: Set up stack
      id: stack-setup
      run: |
        ln -s stack-${{ matrix.ghc }}.yaml stack.yaml
        echo "::set-output name=stack-root::$(stack path --system-ghc --no-install-ghc --stack-root)"

    - uses: actions/cache@v1
      with:
        path: ${{ steps.stack-setup.outputs.stack-root }}
        key: ${{ runner.os }}-${{ matrix.ghc }}-stack

    - name: Build dependencies
      run: |
        stack build $STACK_FLAGS --test --no-run-tests --only-dependencies

    - name: Build
      run: |
        stack build $STACK_FLAGS --test --no-run-tests

    - name: Test
      run: |
        stack test