Automate palette.nix generation

flake.lock

@@ -1,6 +1,59 @@
 {
   "nodes": {
-    "root": {}
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1766070988,
+        "narHash": "sha256-G/WVghka6c4bAzMhTwT2vjLccg/awmHkdKSd2JrycLc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c6245e83d836d0433170a16eb185cefe0572f8b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "palette": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1742245182,
+        "narHash": "sha256-R52Q1FVAclvBk7xNgj/Jl+GPCIbORNf6YbJ1nxH3Gzs=",
+        "owner": "catppuccin",
+        "repo": "palette",
+        "rev": "0df7db6fe201b437d91e7288fa22807bb0e44701",
+        "type": "github"
+      },
+      "original": {
+        "owner": "catppuccin",
+        "repo": "palette",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "palette": "palette",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
   },
   "root": "root",
   "version": 7

flake.nix

@@ -1,9 +1,49 @@
 {
   description = "Catppuccin Color Palette";
 
-  outputs = { self, ... }: {
+  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
+              ''
+            );
+          };
+        }
+      );
     };
 }