move some overlays into theire own package set

packages/adwaita-theming-support.patch

@@ -0,0 +1,55 @@
+diff --git a/src/adw-style-manager.c b/src/adw-style-manager.c
+index 073e7890..85d96259 100644
+--- a/src/adw-style-manager.c
++++ b/src/adw-style-manager.c
+@@ -229,6 +229,22 @@ notify_high_contrast_cb (AdwStyleManager *self)
+   g_object_notify_by_pspec (G_OBJECT (self), props[PROP_HIGH_CONTRAST]);
+ }
+
++static void
++adw_style_manager_theme_changed(GSettings *settings, const char *key, GdkDisplay *display)
++{
++  char *theme = g_settings_get_string(settings, "gtk-theme");
++  if (!theme) {
++    theme = "Adwaita-empty";
++  }
++  gboolean is_dark_variant = NULL != strstr(theme, "-dark");
++
++  g_object_set (gtk_settings_get_for_display (display),
++                "gtk-theme-name", theme,
++                "gtk-application-prefer-dark-theme", is_dark_variant,
++                NULL);
++}
++
++
+ static void
+ adw_style_manager_constructed (GObject *object)
+ {
+@@ -254,19 +270,14 @@ adw_style_manager_constructed (GObject *object)
+                              G_CONNECT_SWAPPED);
+
+     if (!adw_is_granite_present () && !g_getenv ("GTK_THEME")) {
+-      g_object_set (gtk_settings_get_for_display (self->display),
+-                    "gtk-theme-name", "Adwaita-empty",
+-                    NULL);
+-
+-      self->provider = gtk_css_provider_new ();
+-      gtk_style_context_add_provider_for_display (self->display,
+-                                                  GTK_STYLE_PROVIDER (self->provider),
+-                                                  GTK_STYLE_PROVIDER_PRIORITY_THEME);
+-
+-      self->colors_provider = gtk_css_provider_new ();
+-      gtk_style_context_add_provider_for_display (self->display,
+-                                                  GTK_STYLE_PROVIDER (self->colors_provider),
+-                                                  GTK_STYLE_PROVIDER_PRIORITY_THEME);
++      GSettingsSchemaSource *schema_source =
++          g_settings_schema_source_get_default();
++      GSettingsSchema *schema = g_settings_schema_source_lookup(
++          schema_source, "org.gnome.desktop.interface", true);
++      GSettings *interface_settings = g_settings_new_full(schema, NULL, NULL);
++
++      adw_style_manager_theme_changed(interface_settings, "gtk-theme", self->display);
++      g_signal_connect (interface_settings, "changed", G_CALLBACK (adw_style_manager_theme_changed), self->display);
+     }
+
+     self->animations_provider = gtk_css_provider_new ();

packages/default.nix

@@ -0,0 +1,23 @@
+{ inputs, pkgs, system }:
+
+{
+  tela-icon-theme-git = pkgs.tela-icon-theme.overrideAttrs {
+    src = inputs.tela-icon-theme;
+  };
+
+  openrgb-git = pkgs.openrgb.overrideAttrs {
+    src = inputs.openrgb;
+  };
+
+  libadwaita-follow-theme = pkgs.libadwaita.overrideAttrs (old: {
+    patches = (old.patches or [ ])++ [ ./adwaita-theming-support.patch ];
+    doCheck = false;
+  });
+
+  prismlauncher-withExtraStuff = inputs.prismlauncher.packages.${system}.prismlauncher.overrideAttrs (old: {
+    patches = (old.patches or [ ]) ++ [
+      inputs.prism-game-options-patch
+      ./prism-ftb.patch
+    ];
+  });
+}