[Bf-blender-cvs] [5916e73b288] blender-v3.3-release: Fix T100699: Older preferences from 2.93 wont load

[Campbell Barton]

Commit: 5916e73b2888537926d9aa71125a265989fa9e5a
Author: Campbell Barton
Date:   Thu Oct 13 17:33:50 2022 +1100
Branches: blender-v3.3-release
https://developer.blender.org/rB5916e73b2888537926d9aa71125a265989fa9e5a

Fix T100699: Older preferences from 2.93 wont load

Even though this was intentionally removed in [0], loading data from
older startup files is supported. So show them when available.

[0]: 45439dfe4c05eabaa83d0c1b75463966b5ba896d

===================================================================

M	release/scripts/startup/bl_operators/userpref.py

===================================================================

diff --git a/release/scripts/startup/bl_operators/userpref.py b/release/scripts/startup/bl_operators/userpref.py
index ce23024fed5..6a027c0ce1f 100644
--- a/release/scripts/startup/bl_operators/userpref.py
+++ b/release/scripts/startup/bl_operators/userpref.py
@@ -89,6 +89,17 @@ class PREFERENCES_OT_copy_prev(Operator):
             if os.path.isdir(cls._old_version_path(version_split)):
                 return version_split
             version_old = version_old - 1
+
+        # Support loading 2.8x..2.9x startup (any older isn't so useful to load).
+        # NOTE: remove this block for Blender 4.0 and later.
+        if version_old == 299:
+            version_old = 294
+            while version_old >= 280:
+                version_split = version_old // 100, version_old % 100
+                if os.path.isdir(cls._old_version_path(version_split)):
+                    return version_split
+                version_old = version_old - 1
+
         return None
 
     @classmethod