Please note: This repository is currently unmaintained by a team of developers at GitHub. The repository is here and you can use it as an example, or in Actions. However please be aware that we are not going to be updating issues or pull requests on this repository.

Maintained forks:

• haskell/actions

You could also fork this code and maintain it, if you do please let us know.

To reflect this state we’ve marked this repository as Archived.

If you are having an issue or question about GitHub Actions then please contact customer support.

If you have found a security issue please submit it here.

This action sets up a Haskell environment for use in actions by:

• optionally installing a version of ghc and cabal and adding to PATH.
• optionally installing a version of Stack and adding to PATH.
• setting the outputs of ghc-path, cabal-path, stack-path, and cabal-store when necessary.

The GitHub runners come with pre-installed versions of GHC and Cabal. Those will be used whenever possible. For all other versions, this action utilizes ppa:hvr/ghc, ghcup, and chocolatey.

See action.yml

Minimal:

on: [push]
name: build
jobs:
  runhaskell:
    name: Hello World
    runs-on: ubuntu-latest # or macOS-latest, or windows-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/[email protected]
      - run: runhaskell Hello.hs

Basic:

on: [push]
name: build
jobs:
  runhaskell:
    name: Hello World
    runs-on: ubuntu-latest # or macOS-latest, or windows-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/[email protected]
        with:
          ghc-version: '8.8' # Resolves to the latest point release of GHC 8.8
          cabal-version: '3.0.0.0' # Exact version of Cabal
      - run: runhaskell Hello.hs

Basic with Stack:

on: [push]
name: build
jobs:
  runhaskell:
    name: Hello World
    runs-on: ubuntu-latest # or macOS-latest, or windows-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/[email protected]
        with:
          ghc-version: '8.8.3' # Exact version of ghc to use
          # cabal-version: 'latest'. Omitted, but defalts to 'latest'
          enable-stack: true
          stack-version: 'latest'
      - run: runhaskell Hello.hs

Matrix Testing:

on: [push]
name: build
jobs:
  build:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        ghc: ['8.6.5', '8.8.3']
        cabal: ['2.4.1.0', '3.0.0.0']
        os: [ubuntu-latest, macOS-latest, windows-latest]
        exclude:
          # GHC 8.8+ only works with cabal v3+
          - ghc: 8.8.3
            cabal: 2.4.1.0
    name: Haskell GHC ${{ matrix.ghc }} sample
    steps:
      - uses: actions/checkout@v2
      - name: Setup Haskell
        uses: actions/[email protected]
        with:
          ghc-version: ${{ matrix.ghc }}
          cabal-version: ${{ matrix.cabal }}
      - run: runhaskell Hello.hs

GHC:

• latest (default, recommended)
• 8.10.1 8.10
• 8.8.3 8.8
• 8.8.2
• 8.8.1
• 8.6.5 8.6
• 8.6.4
• 8.6.3
• 8.6.2
• 8.6.1
• 8.4.4 8.4
• 8.4.3
• 8.4.2
• 8.4.1
• 8.2.2 8.2
• 8.0.2 8.0
• 7.10.3 7.10

Suggestion: Try to support the three latest major versions of GHC.

Cabal:

• latest (default, recommended)
• 3.2.0.0 3.2
• 3.0.0.0 3.0
• 2.4.1.0 2.4
• 2.4.0.0
• 2.2.0.0 2.2

Recommendation: Use the latest available version if possible.

Stack:

• latest (recommended) -- follows the latest release automatically.
• 2.3.1 2.3
• 2.1.3 2.1
• 2.1.1
• 1.9.3.1 1.9
• 1.9.1.1
• 1.7.1 1.7
• 1.6.5 1.6
• 1.6.3.1
• 1.6.1.1
• 1.5.1 1.5
• 1.5.0
• 1.4.0 1.4
• 1.3.2 1.3
• 1.3.0
• 1.2.0 1.2

Recommendation: Use the latest available version if possible.

The full list of available versions of GHC, Cabal, and Stack are as follows:

• Linux/macOS - Cabal and GHC
• Windows - Cabal.
• Windows - GHC
• Linux/macOS/Windows - Stack

Note: There are technically some descrepencies here. For example, "8.10.1-alpha1" will work for a ghc version for windows but not for Linux and macOS. For your sanity, I suggest sticking with the version lists above which are supported across all three operating systems.

The scripts and documentation in this project are released under the MIT License.

Contributions are welcome! See the Contributor's Guide.