Revert "kill git hook"

This reverts commit f7d050a3a6.

flake.nix

@@ -42,6 +42,23 @@
         {
           formatter = pkgs.nixfmt-rfc-style;
 
+          pre-commit.settings.hooks =
+            let
+              ## Add a directory here if pre-commit hooks shouldn't apply to it.
+              optout = [
+                "npins"
+                "launch/.terraform"
+              ];
+              excludes = map (dir: "^${dir}/") optout;
+              addExcludes = lib.mapAttrs (_: c: c // { inherit excludes; });
+            in
+            addExcludes {
+              nixfmt-rfc-style.enable = true;
+              deadnix.enable = true;
+              trim-trailing-whitespace.enable = true;
+              shellcheck.enable = true;
+            };
+
           devShells.default = pkgs.mkShell {
             packages = [
               pkgs.nil
@@ -54,6 +71,7 @@
                 impureEnvVars = [ "DEPLOYMENT" ];
               })
             ];
+            shellHook = config.pre-commit.installationScript;
           };
         };
     };