Automate palette.nix generation

flake.nix

@@ -1,9 +1,49 @@
 {
   description = "Catppuccin Color Palette";
-  
-  outputs = { self, ... }: {
-    lib = {
-      palette = import ./palette.nix;
-    };
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    systems.url = "github:nix-systems/default";
+
+    palette.url = "github:catppuccin/palette";
+    palette.flake = false;
   };
+
+  outputs =
+    {
+      nixpkgs,
+      systems,
+      palette,
+      ...
+    }:
+    let
+      forEachSystem = nixpkgs.lib.genAttrs (import systems);
+    in
+    {
+      lib = {
+        palette = import ./palette.nix;
+      };
+
+      apps = forEachSystem (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          rawPalette = builtins.fromJSON (builtins.readFile "${palette}/palette.json");
+          paletteNix = nixpkgs.lib.generators.toPretty { } rawPalette;
+        in
+        {
+          generate-palette = {
+            type = "app";
+            program = toString (
+              pkgs.writeShellScript "generate-palette" ''
+                echo 'Updating palette.nix ...'
+                cat > palette.nix << EOF
+                ${paletteNix}
+                EOF
+              ''
+            );
+          };
+        }
+      );
+    };
 }