fix flake formatteR

Author: macalinao

flake.nix

@@ -6,28 +6,33 @@
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { flake-utils, nixpkgs, ... }:
-    (flake-utils.lib.eachDefaultSystem (system:
+  outputs =
+    { flake-utils, nixpkgs, ... }:
+    (flake-utils.lib.eachDefaultSystem (
+      system:
       let
         pkgs = import nixpkgs {
           inherit system;
           overlays = [
             (_: pkgs: {
-              update-static-assets =
-                pkgs.writeShellScriptBin "update-static-assets" ''
-                  set +x
-                  GIT_ROOT=$(git rev-parse --show-toplevel)
-                  if [ ! -e ./static-assets ]; then
-                    echo "Incorrect directory; must have static-assets folder."
-                    exit 1
-                  fi
-                  ${pkgs.awscli2}/bin/aws s3 sync --exclude '.*' \
-                   --profile ian --acl public-read \
-                    $GIT_ROOT/static-assets s3://static.ian.pw/images/
-                '';
+              update-static-assets = pkgs.writeShellScriptBin "update-static-assets" ''
+                set +x
+                GIT_ROOT=$(git rev-parse --show-toplevel)
+                if [ ! -e ./static-assets ]; then
+                  echo "Incorrect directory; must have static-assets folder."
+                  exit 1
+                fi
+                ${pkgs.awscli2}/bin/aws s3 sync --exclude '.*' \
+                 --profile ian --acl public-read \
+                  $GIT_ROOT/static-assets s3://static.ian.pw/images/
+              '';
             })
           ];
         };
       in
-      { devShell = import ./shell.nix { inherit pkgs; }; }));
+      {
+        formatter = pkgs.nixfmt-rfc-style;
+        devShell = import ./shell.nix { inherit pkgs; };
+      }
+    ));
 }

shell.nix

@@ -9,6 +9,7 @@ in
 mkShell {
   buildInputs = [
     (yarn.override { inherit nodejs; })
+    nixfmt-rfc-style
     nodejs
     awscli2
     update-static-assets