purge flake demons

nix/module.nix

@@ -1,4 +1,60 @@
-{overlays}: {
-  nixpkgs.overlays = overlays;
-  imports = [./culr-module.nix];
+{
+  lib,
+  config,
+  ...
+}:
+let
+  inherit (lib)
+    mkIf
+    mkEnableOption
+    mkPackageOption
+    mkOption
+    types
+    concatStringsSep
+    typeOf
+    ;
+  cfg = config.programs.culr;
+in
+{
+  options.programs.culr = {
+    enable = mkEnableOption "culr";
+    package = mkPackageOption { } "" { };
+    pattern = mkOption {
+      type = with types; either str (listOf int);
+      default = [ ];
+      description = "colourising pattern";
+    };
+    palette = mkOption {
+      type = with types; listOf str;
+      default = [ ];
+      description = "palette to use in comma separated RGB hex eg. #0f0f0f";
+    };
+    separators = mkOption {
+      type = with types; str;
+      default = "";
+      description = "char list of separators to use";
+    };
+    delimiters = mkOption {
+      type = with types; str;
+      default = "";
+      description = "char list of delimiters to use";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+    environment.sessionVariables = {
+      CULR_ORDER =
+        let
+          serialise = {
+            list = list: concatStringsSep ";" (map (i: builtins.toString i) list);
+            string = s: s;
+          };
+        in
+        mkIf (cfg.pattern != "" && cfg.pattern != [ ]) (serialise.${typeOf cfg.pattern} cfg.pattern);
+      CULR_PALETTE = mkIf (cfg.palette != [ ]) (concatStringsSep ";" cfg.palette);
+      CULR_SEP = mkIf (cfg.separators != "") (cfg.separators);
+      CULR_DELIM = mkIf (cfg.delimiters != "") (cfg.delimiters);
+    };
+  };
 }