current state of things

rice/wallpaper.nix

@@ -0,0 +1,34 @@
+{
+  pkgs,
+  lib,
+  stdenv,
+  ...
+}:
+{
+  palette,
+  wallpaper,
+}:
+let
+  strPal =
+    let
+      inherit (lib) concatStringsSep;
+      inherit (builtins) foldl' attrValues;
+    in
+    concatStringsSep " " (
+      foldl' (acc: el: acc ++ (attrValues el)) [ ] [ palette.normal palette.bright palette.util ]
+    );
+in
+stdenv.mkDerivation {
+  name = "generated-wallpaper.png";
+  src = wallpaper;
+  buildInputs = [
+    pkgs.lutgen
+  ];
+
+  phases = [ "installPhase" ];
+
+  installPhase = ''
+    echo -e "Generating wallpaper from ${wallpaper} using palette:\n${strPal}.."
+    ${lib.getExe pkgs.lutgen} apply --lum 0.8 -l 10 -s 128 -n 8 -o $out ${wallpaper} -- ${strPal}
+  '';
+}