anvil-editor: add module

modules/programs/anvil-editor.nix

@@ -0,0 +1,75 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}:
+let
+  inherit (lib)
+    mkIf
+    mkEnableOption
+    mkPackageOption
+    mkOption
+    ;
+
+  cfg = config.programs.anvil-editor;
+  tomlFormat = pkgs.formats.toml { };
+  jsonFormat = pkgs.formats.json { };
+in
+{
+  meta.maintainers = with lib.hm.maintainers; [ aguirre-matteo ];
+  options.programs.anvil-editor = {
+    enable = mkEnableOption "anvil-editor";
+    package = mkPackageOption pkgs "anvil-editor" { nullable = true; };
+    settings = mkOption {
+      inherit (tomlFormat) type;
+      default = { };
+      example = {
+        general.exec = [
+          "aad"
+          "ado"
+        ];
+        layout.column-tag = "New Cut Paste Snarf Zerox Delcol";
+        typesetting.replace-cr-with-tofu = false;
+        env = {
+          FOO = "BAR";
+          BAR = "FOO";
+        };
+      };
+      description = ''
+        Configuration settings for anvil-editor. All available options can be found here:
+        <https://anvil-editor.net/reference/config/#settingstoml>.
+      '';
+    };
+    style = mkOption {
+      inherit (jsonFormat) type;
+      default = { };
+      example = {
+        TagFgColor = "#fefefe";
+        TagBgColor = "#263859";
+        BodyBgColor = "#17223b";
+        ScrollFgColor = "#17223b";
+        ScrollBgColor = "#6b778d";
+        GutterWidth = 14;
+        WinBorderColor = "#000000";
+      };
+      description = ''
+        Style settings for anvil-editor. All available options can be found here:
+        <https://anvil-editor.net/reference/config/#stylejs>.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = mkIf (cfg.package != null) [ cfg.package ];
+    home.file = {
+      ".anvil/settings.toml" = mkIf (cfg.settings != { }) {
+        source = tomlFormat.generate "anvil-settings.toml" cfg.settings;
+      };
+
+      ".anvil/style.js" = mkIf (cfg.style != { }) {
+        source = jsonFormat.generate "anvil-style.js" cfg.style;
+      };
+    };
+  };
+}