Add devenv for dotfiles

flake.nix

@@ -7,16 +7,22 @@
     agenix.url = "github:ryantm/agenix";
     agenix.inputs.nixpkgs.follows = "nixpkgs";
 
-    i3utils.url = "git+https://git.sr.ht/~dpatterbee/i3utils?ref=main";
-    i3utils.inputs.nixpkgs.follows = "nixpkgs";
+    alejandra.url = "github:kamadorueda/alejandra/3.0.0";
+    alejandra.inputs.nixpkgs.follows = "nixpkgs";
+
+    devenv.url = "github:cachix/devenv";
+    devenv.inputs.nixpkgs.follows = "nixpkgs";
+
+    golink.url = "github:tailscale/golink";
+    golink.inputs.nixpkgs.follows = "nixpkgs";
 
     home-manager.url = "github:nix-community/home-manager/master";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
 
     hyprland.url = "github:hyprwm/Hyprland";
 
-    golink.url = "github:tailscale/golink";
-    golink.inputs.nixpkgs.follows = "nixpkgs";
+    i3utils.url = "git+https://git.sr.ht/~dpatterbee/i3utils?ref=main";
+    i3utils.inputs.nixpkgs.follows = "nixpkgs";
 
     nixgl.url = "github:/guibou/nixGL";
     nixgl.inputs.nixpkgs.follows = "nixpkgs";
@@ -25,13 +31,15 @@
   outputs = {
     nixpkgs,
     agenix,
-    home-manager,
-    i3utils,
-    hyprland,
+    alejandra,
+    devenv,
     golink,
+    home-manager,
+    hyprland,
+    i3utils,
     nixgl,
     ...
-  }: let
+  } @ inputs: let
     system = "x86_64-linux";
 
     pkgs =
@@ -142,5 +150,29 @@
         hostname = "deck";
       };
     };
+
+    devShell.${system} = devenv.lib.mkShell {
+      inherit inputs pkgs;
+      modules = [
+        {
+          # https://devenv.sh/reference/options/
+          packages = with pkgs; [
+            alejandra.packages.${system}.default
+          ];
+
+          enterShell = ''
+          '';
+
+          env = {
+          };
+
+          scripts = {
+            tidy.exec = ''
+              alejandra -e ./users/configs/desktop/hyprland/default.nix .
+            '';
+          };
+        }
+      ];
+    };
   };
 }