Enable clippy on CI (#574)

* Enable clippy on CI

* Use rustc in check-clippy...

.github/workflows/ci.yml

@@ -21,6 +21,8 @@ jobs:
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - name: Check rustfmt
         run: nix develop --command check-rustfmt
+      - name: Check Clippy
+        run: nix develop --command check-clippy
       - name: Check Spelling
         run: nix develop --command check-spelling
       - name: Check nixpkgs-fmt formatting

flake.nix

@@ -144,6 +144,7 @@
               check.check-nixpkgs-fmt
               check.check-editorconfig
               check.check-semver
+              check.check-clippy
             ]
             ++ lib.optionals (pkgs.stdenv.isDarwin) (with pkgs; [
               libiconv

nix/check.nix

@@ -50,4 +50,13 @@ in
       cargo-semver-checks semver-checks check-release
     '';
   });
+  # Clippy
+  check-clippy = (writeShellApplication {
+    name = "check-clippy";
+    runtimeInputs = with pkgs; [ cargo clippy rustc ];
+    text = ''
+      cargo clippy
+    '';
+  });
+
 }