Merge pull request #17 from srid/hlint

Add hlint (relude)

.github/workflows/ci.yaml

@@ -10,18 +10,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v13
+      - uses: cachix/install-nix-action@v17
         with:
-          install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
-          install_options: "--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve"
           extra_nix_config: |
             experimental-features = nix-command flakes
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
       - name: Cache Nix dependencies
         run: |
           nix develop -j 4 -c echo
       - name: Format check
         run: |
           nix develop -j auto -c treefmt --fail-on-change
+      - name: Hlint
+        run: |
+          nix develop -j auto -c hlint src
       - name: Build
         id: build
         run: |

README.md

@@ -6,6 +6,7 @@ Haskell project template optimized for a fully reproducible and friendly develop
 - VSCode + [HLS](https://github.com/haskell/haskell-language-server)
 - [fourmolu](https://github.com/fourmolu/fourmolu) autoformatting 
 - [Relude](https://github.com/kowainik/relude#relude) as Prelude.
+  - `.hlint.yaml` is [from relude](https://github.com/kowainik/relude/blob/main/.hlint.yaml)
 
 ## Getting Started