haskell.yml

name: Haskell

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v4
    - uses: haskell-actions/setup@v2
      id:   setup
      # Default options, written out for clarity:
      with:
        ghc-version: latest
        cabal-update: true

    - name: Configure build
      run: |
        cabal configure --enable-tests --enable-benchmarks --write-ghc-environment-files=always
        cabal build --dry-run
      # The latter creates the build plan in dist-newstyle/cache/plan.json

    - name: Restore cached dependencies
      uses: actions/cache/restore@v3
      id:   cache
      env:
        cache-name: cache-cabal
      with:
        path: ~/.cabal
        key:          ${{ runner.os }}-${{ env.cache-name }}-ghc-${{ steps.setup.outputs.ghc-version}}-plan-${{ hashFiles('dist-newstyle/cache/plan.json') }}
        restore-keys: ${{ runner.os }}-${{ env.cache-name }}-ghc-${{ steps.setup.outputs.ghc-version}}-

    - name: Install dependencies
      if:   steps.cache.outputs.cache-hit != 'true'
      run: |
        cabal build --only-dependencies

    - name: Cache dependencies
      uses: actions/cache/save@v3
      if:   steps.cache.outputs.cache-hit != 'true'
      with:
        path: ~/.cabal
        key:  ${{ steps.cache.outputs.cache-primary-key }}

    - name: Build
      run: |
        cabal build all

    - name: Test
      run: |
        cabal test all