LibOverride: Add a new operation to Outliner to enforce resync of hierarchies.

This is basically done by ignoring override operations from old override
affecting ID pointer properties, when the new (destination) one is not
NULL.

Fix T86501: New object added to overridden collection doesn't show up in linking file on Resync.

This is more of a work-around actually, since there is no real way to
fix the issue in a fully automated and consistent way, it is caused by
older blender files being saved with 'broken' overrides.

WARNING: This cannot ensure that some purposedly edited/overridden ID
pointer properties won't be lost in the process.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_lib_override.h b/source/blender/blenkernel/BKE_lib_override.h
index e548f778c71..ccb313f0e2a 100644
--- a/source/blender/blenkernel/BKE_lib_override.h
+++ b/source/blender/blenkernel/BKE_lib_override.h
@@ -79,7 +79,8 @@ bool BKE_lib_override_library_proxy_convert(struct Main *bmain,
 bool BKE_lib_override_library_resync(struct Main *bmain,
                                      struct Scene *scene,
                                      struct ViewLayer *view_layer,
-                                     struct ID *id_root);
+                                     struct ID *id_root,
+                                     const bool do_hierarchy_enforce);
 void BKE_lib_override_library_main_resync(struct Main *bmain,
                                           struct Scene *scene,
                                           struct ViewLayer *view_layer);