GHCup action

A simple github action to install ghcup binary on any system and add it to PATH.

Usage

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@v4
      - uses: haskell/ghcup-setup@v1
      - run: |
          ghcup install ghc --set latest
          runhaskell Hello.hs

Matrix testing with prereleases

on: [push]
name: build
jobs:
  build:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        ghc: ['8.6.5', '8.8.4', 'latest-prerelease']
        cabal: ['2.4.1.0', '3.0.0.0']
        os: [ubuntu-latest, macOS-latest, windows-latest]
        exclude:
          - ghc: 8.8.4
            cabal: 2.4.1.0
    name: Haskell GHC ${{ matrix.ghc }} sample
    steps:
      - uses: actions/checkout@v4
      - uses: haskell/ghcup-setup@v1
        with:
          release-channels: |
            GHCupURL
            https://raw.githubusercontent.com/haskell/ghcup-metadata/refs/heads/master/ghcup-prereleases-0.0.8.yaml
      - run: |
          ghcup install ghc --set ${{ matrix.ghc }}
          ghcup install cabal --set ${{ matrix.cabal }}
          runhaskell Hello.hs

Inputs

Name	Description	Type	Default
version	GHCup version to install	string	latest
release-channels	Set the release-channels	string[]	GHCupURL

Outputs

Name	Description	Type
path	Path to the installed GHCup	string
version	Version of the installed GHCup	string