GitHub actions for testing Haskell package?

Question

Recently I was lured from Travis CI to GitHub actions for my Julia project by the ease of configuration and out-of-the box success with all of the example Actions I found, and thought I'd try the same with my Haskell project. But none of the example Haskell Actions I found function at all, most failing with security or gcc compiler flag errors, even for exactly the same commands that work in Travis CI.

Are there examples of functioning Haskell GitHub Actions? I suspect I'm just not looking in the right place for the latest working examples.

user_656912 · Answer

Ultimately, after a lot of trial and error, I ended up with roughly this, which works perfectly:

name: Tests

on:
  pull_request:
  push:
    branches: [hackage, develop]

jobs:
  build:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        ghc: ['8.8.3', '8.10.5']
        cabal: ['2.4.1.0', '3.0.0.0']
        os: [ubuntu-latest]
        resolver: [lts-3.22 , lts-17, lts-18, lts]
        exclude:
          # GHC 8.8+ only works with cabal v3+
          - ghc: 8.8.3
            cabal: 2.4.1.0
    name: ${{ matrix.resolver }} (${{ matrix.ghc }}/${{ matrix.cabal }})
    steps:

      - name: Check out
        uses: actions/checkout@v2

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

      - name: Versions
        run: |
          stack --version
          cabal --version
          ghc --version

      - name: Initalize stack for LTS
        run: |
          stack update
          stack init --resolver ${{ matrix.resolver }} --force

      - name: Build package dependencies
        run: |
          stack --resolver ${{ matrix.resolver }} build --no-run-tests --no-run-benchmarks --only-dependencies

      - name: Build package
        run: |
          stack --resolver ${{ matrix.resolver }} build --no-run-tests --no-run-benchmarks

      - name: Build testing dependencies
        run: |
          stack --resolver ${{ matrix.resolver }} build --no-run-tests --no-run-benchmarks --test --bench

      - name: Run tests
        run: |
          stack --resolver ${{ matrix.resolver }} build --test --no-run-benchmarks

      - name: Package list
        run: |
          stack --resolver ${{ matrix.resolver }} exec ghc-pkg list || true

(Though I'm not sure the build steps are in quite the right order for what I intend, and have some questions about where caching should go.)

GitHub actions for testing Haskell package?

1 Answers