Rigify: Add ability to disable installed feature sets

This patch is a continuation of D8519, was also suggested in T88711#1170152.
It adds a checkbox for each feature set in the Rigify Preferences, to disable/enable that feature set without having to completely remove it from the file system.

Challenges that were hopefully successfully tackled:
- Keep list in sync when user manually adds or removes things through the file system instead of the "add/remove feature set" buttons in the UI.
- Avoid re-building the feature set list all the time so that the checkbox states can actually be stored when the user exits Blender.
- Disabling a feature set means calling its unregister function, then rebuilding the rig types and metarigs lists/menus.
- Some renaming slipped in because I found the variable name "feature_set" a bit confusing. If needed, I could split this change into a separate patch or just forget about it, but I think the longer names help here.

Testing would be welcome, since things turned out a bit more tricky than expected.

In a follow-up patch I would like to do a code quality pass, to split the code a bit better here. There is a bit too much stuff in __init__.py in particular. I will get started on that when this gets close to being finalized.

Reviewed By: angavrilov

Differential Revision: https://developer.blender.org/D12260

1 files changed, 3 insertions, 3 deletions

diff --git a/rigify/ui.py b/rigify/ui.py
index 59dbf9b6..eac8b673 100644
--- a/rigify/ui.py
+++ b/rigify/ui.py
@@ -54,7 +54,7 @@ def build_type_list(context, rigify_types):
 
     for r in sorted(rig_lists.rigs):
         if (context.object.data.active_feature_set in ('all', rig_lists.rigs[r]['feature_set'])
-                or len(feature_set_list.get_installed_list()) == 0
+                or len(feature_set_list.get_enabled_modules_names()) == 0
                 ):
             a = rigify_types.add()
             a.name = r
@@ -191,7 +191,7 @@ class DATA_PT_rigify_samples(bpy.types.Panel):
             id_store.rigify_active_type = 0
 
         # Rig type list
-        if len(feature_set_list.get_installed_list()) > 0:
+        if len(feature_set_list.get_enabled_modules_names()) > 0:
             row = layout.row()
             row.prop(context.object.data, "active_feature_set")
         row = layout.row()
@@ -609,7 +609,7 @@ class BONE_PT_rigify_buttons(bpy.types.Panel):
         build_type_list(context, id_store.rigify_types)
 
         # Rig type field
-        if len(feature_set_list.get_installed_list()) > 0:
+        if len(feature_set_list.get_enabled_modules_names()) > 0:
             row = layout.row()
             row.prop(context.object.data, "active_feature_set")
         row = layout.row()