Add HLint to CI #7

	name: covenant

	on:
	pull_request:
	push:

	jobs:
	generate-matrix:
	name: "Generate matrix from cabal"
	outputs:
	matrix: ${{ steps.set-matrix.outputs.matrix }}
	runs-on: ubuntu-latest
	steps:
	- name: Extract the tested GHC versions
	id: set-matrix
	uses: kleidukos/get-tested@v0.1.7.1
	with:
	cabal-file: covenant.cabal
	ubuntu-version: "latest"
	macos-version: "latest"
	windows-version: "latest"
	version: 0.1.7.1
	ormolu:
	name: "Check formatting with Ormolu"
	runs-on: ubuntu-latest
	steps:
	- name: Checkout base repo
	uses: actions/checkout@v3
	- name: Run Ormolu
	uses: haskell-actions/run-ormolu@v16
	with:
	mode: "check"
	hlint:
	name: "Check with HLint"
	runs-on: ubuntu-latest
	steps:
	- name: Checkout base repo
	uses: actions/checkout@v3
	- name: Set up HLint
	uses: haskell-actions/setup-hlint@v2
	- name: Run HLint
	uses: haskell-actions/run-hlint@v2
	with:
	path: src/
	fail-on: warning
	tests:
	name: ${{ matrix.ghc }} on ${{ matrix.os }}
	needs: [generate-matrix, ormolu]
	runs-on: ${{ matrix.os }}
	strategy:
	matrix: ${{ fromJSON(needs.generate-matrix.outputs.matrix) }}
	steps:
	- name: Checkout base repo
	uses: actions/checkout@v3
	- name: Set up Haskell
	id: setup-haskell
	uses: haskell-actions/setup@v2
	with:
	ghc-version: ${{ matrix.ghc }}
	cabal-version: latest
	- name: Freeze
	run: cabal freeze
	- name: Cache
	uses: actions/cache@v4
	with:
	path: ${{ steps.setup-haskell.outputs.cabal-store }}
	key: ${{ runner.os}}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
	restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-
	- name: Build
	run: cabal build

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