Bump actions/checkout from 3 to 4 #2

	name: CI

	# Trigger the workflow on push or pull request, but only for the master branch
	on:
	pull_request:
	push:
	branches: ["master"]

	jobs:
	generateMatrix:
	name: "Generate matrix from cabal"
	runs-on: ubuntu-latest
	outputs:
	matrix: ${{ steps.set-matrix.outputs.matrix }}
	steps:
	- name: Checkout base repo
	uses: actions/checkout@v4
	- name: Extract the tested GHC versions
	id: set-matrix
	run: \|
	wget https://github.com/Kleidukos/get-tested/releases/download/v0.1.5.0/get-tested-0.1.5.0-linux-amd64 -O get-tested
	chmod +x get-tested
	./get-tested --ubuntu --macos *.cabal >> $GITHUB_OUTPUT
	tests:
	name: ${{ matrix.ghc }} on ${{ matrix.os }}
	needs: generateMatrix
	runs-on: ${{ matrix.os }}
	strategy:
	matrix: ${{ fromJSON(needs.generateMatrix.outputs.matrix) }}
	steps:
	- name: Checkout base repo
	uses: actions/checkout@v4
	- name: "Configure ghcup"
	run: \|
	ghcup config add-release-channel https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-prereleases-0.0.7.yaml
	- name: Set up Haskell
	id: setup-haskell
	uses: haskell/actions/setup@v2
	with:
	ghc-version: ${{ matrix.ghc }}
	cabal-version: 'latest'
	- name: Configure
	run: cabal new-configure --enable-tests
	- name: Freeze
	run: cabal freeze
	- name: Cache
	uses: actions/[email protected]
	with:
	path: ${{ steps.setup-haskell.outputs.cabal-store }}
	key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
	- name: Build
	run: cabal new-build
	- name: Test
	run: cabal new-test all

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