build.yml

# From https://github.com/jonathanknowles/haskell-example
on:
  workflow_dispatch:
  pull_request:
    types:
      - synchronize
      - opened
      - reopened
  push:
    branches:
      - main
  schedule:
    # Run once per day (at UTC 00:00) to maintain cache:
    - cron: 0 0 * * *
jobs:
  build:
    name: ${{ matrix.os }}-ghc-${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os:
          - ubuntu-latest
          - macOS-latest
          - windows-latest
        cabal:
          - 3.6.2.0
        ghc:
          - 8.10.7
          - 9.0.2
          - 9.2.2
    steps:
      - name: Checkout
        uses: actions/checkout@v2

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

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

      - name: Freeze
        run: |
          cabal freeze

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

      - name: Dependencies
        run: |
          ghc --version
          cabal --version
          cabal build all --only-dependencies

      - name: Build
        run: |
          cabal build all

      - name: Test
        run: |
          cabal test all

      - name: Documentation
        if: |
            matrix.os == 'ubuntu-latest'
            && matrix.ghc == '8.10.7'
        run: >
          cabal haddock
          --haddock-hyperlink-source
          --haddock-quickjump
          --haddock-html-location
          'https://hackage.haskell.org/package/$pkg-$version/docs'

          mv dist-newstyle/build/*/*/*/doc/html/* gh-pages

          touch gh-pages/.nojekyll

      - name: Deploy
        if: |
            github.ref == 'refs/heads/main'
            && matrix.os == 'ubuntu-latest'
            && matrix.ghc == '8.10.7'
        uses: JamesIves/github-pages-deploy-action@v4.3.3
        with:
          branch: gh-pages
          folder: gh-pages