vesktop: created module

Added a home-manager module for vesktop that allows for configuring both
vesktop and vencord, and creating a custom theme.

modules/programs/vesktop.nix

@@ -0,0 +1,112 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+
+  cfg = config.programs.vesktop;
+  jsonFormat = pkgs.formats.json { };
+
+in
+{
+  meta.maintainers = [
+    lib.maintainers.Flameopathic
+    lib.hm.maintainers.LilleAila
+  ];
+
+  options.programs.vesktop = {
+    enable = lib.mkEnableOption "Vesktop, an alternate client for Discord with Vencord built-in";
+    package = lib.mkPackageOption pkgs "vesktop" { };
+    settings = lib.mkOption {
+      type = jsonFormat.type;
+      default = { };
+      description = ''
+        Vesktop settings written to
+        {file}`$XDG_CONFIG_HOME/vesktop/settings.json`. See
+        <https://github.com/Vencord/Vesktop/blob/main/src/shared/settings.d.ts>
+        for available options.
+      '';
+      example = lib.literalExpression ''
+        {
+          appBadge = false;
+          arRPC = true;
+          checkUpdates = false;
+          customTitleBar = false;
+          disableMinSize = true;
+          minimizeToTray = false;
+          tray = false;
+          splashBackground = "#000000";
+          splashColor = "#ffffff";
+          splashTheming = true;
+          staticTitle = true;
+          hardwareAcceleration = true;
+          discordBranch = "stable";
+        }
+      '';
+    };
+
+    vencord = {
+      useSystem = lib.mkEnableOption "Vencord package from Nixpkgs";
+      theme = lib.mkOption {
+        description = "The theme to use for Vencord";
+        default = null;
+        type =
+          with lib.types;
+          nullOr (oneOf [
+            lines
+            path
+          ]);
+      };
+      settings = lib.mkOption {
+        type = jsonFormat.type;
+        default = { };
+        description = ''
+          Vencord settings written to
+          {file}`$XDG_CONFIG_HOME/vesktop/settings/settings.json`. See
+          <https://github.com/Vendicated/Vencord/blob/main/src/api/Settings.ts>
+          for available options.
+        '';
+        example = lib.literalExpression ''
+          {
+            autoUpdate = false;
+            autoUpdateNotification = false;
+            notifyAboutUpdates = false;
+            useQuickCss = true;
+            disableMinSize = true;
+            plugins = {
+              MessageLogger = {
+                enabled = true;
+                ignoreSelf = true;
+              };
+              FakeNitro.enabled = true;
+            };
+          }
+        '';
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable (
+    lib.mkMerge [
+      {
+        home.packages = [
+          (cfg.package.override { withSystemVencord = cfg.vencord.useSystem; })
+        ];
+        xdg.configFile."vesktop/settings.json".source = jsonFormat.generate "vesktop-settings" cfg.settings;
+        xdg.configFile."vesktop/settings/settings.json".source =
+          jsonFormat.generate "vencord-settings" cfg.vencord.settings;
+      }
+      (lib.mkIf (cfg.vencord.theme != null) {
+        programs.vesktop.vencord.settings.enabledThemes = [ "theme.css" ];
+        xdg.configFile."vesktop/themes/theme.css".source =
+          if builtins.isPath cfg.vencord.theme || lib.isStorePath cfg.vencord.theme then
+            cfg.vencord.theme
+          else
+            pkgs.writeText "vesktop/themes/theme.css" cfg.vencord.theme;
+      })
+    ]
+  );
+}