Asset System: Disable Asset Browser as experimental feature

The Asset Browser will be disabled and not available for the 2.92 release. In
alpha/beta builds, there will be an "Asset Browser" option under Preferences >
Experimental, if the developer extras are enabled.
Note that this also disables related UI elements (e.g. "Mark Asset" buttons,
Preferences settings for asset libraries, etc.).

The code is still in master of course, development and testing will continue
there. But there simply needs to be too much polishing and fixing before the
2.92 release, plus there are some design decisions to be reevaluated.

Check the milestone 1 project to follow ongoing work:
https://developer.blender.org/project/view/124/

1 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/editors/space_file/space_file.c b/source/blender/editors/space_file/space_file.c
index 774dc54700c..aedc6228355 100644
--- a/source/blender/editors/space_file/space_file.c
+++ b/source/blender/editors/space_file/space_file.c
@@ -776,7 +776,13 @@ static void file_space_subtype_item_extend(bContext *UNUSED(C),
                                            EnumPropertyItem **item,
                                            int *totitem)
 {
-  RNA_enum_items_add(item, totitem, rna_enum_space_file_browse_mode_items);
+  if (U.experimental.use_asset_browser) {
+    RNA_enum_items_add(item, totitem, rna_enum_space_file_browse_mode_items);
+  }
+  else {
+    RNA_enum_items_add_value(
+        item, totitem, rna_enum_space_file_browse_mode_items, FILE_BROWSE_MODE_FILES);
+  }
 }
 
 static const char *file_context_dir[] = {"active_file", "active_id", NULL};