build.yml

name: build

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
  schedule:
    - cron: 0 0 * * *

jobs:
  build:
    name: ${{ matrix.os }} / GHC ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}

    strategy:
      matrix:
        os:
          - ubuntu-latest
        ghc:
          - '8.2'
          - '8.4'
          - '8.6'
          - '8.8'
          - '8.10'
          - '9.0'
          - '9.2'
          - '9.4'
        include:
          - os: macos-latest
            ghc: system
          - os: windows-latest
            ghc: system
    steps:
      - uses: actions/checkout@v3
      - uses: hspec/setup-haskell@v1
        with:
          ghc-version: ${{ matrix.ghc }}

      - run: cabal update
      - run: echo "::set-output name=version::`ghc --numeric-version`"
        shell: bash
        id: ghc
      - uses: actions/cache@v3
        with:
          path: ${{ runner.os == 'Windows' && 'C:/cabal/store' || '~/.cabal/store' }}
          key: ${{ runner.os }}-v2-${{ steps.ghc.outputs.version }}-${{ github.run_id }}
          restore-keys: ${{ runner.os }}-v2-${{ steps.ghc.outputs.version }}-

      - uses: sol/run-haskell-tests@v1

  success:
    needs: build
    runs-on: ubuntu-latest
    if: always() # this is required as GitHub considers "skipped" jobs as "passed" when checking branch protection rules

    steps:
      - run: false
        if: needs.build.result != 'success'

      - uses: actions/checkout@v3
      - name: Check for trailing whitespace
        run: '! git grep -I "\s\+$"'