Commit: 809b33b69a04fc37e1535697b667158ca80f6d60
Author: Campbell Barton
Date: Thu Sep 2 15:29:33 2021 +1000
Branches: master
https://developer.blender.org/rB809b33b69a04fc37e1535697b667158ca80f6d60
Docs: improve the error when undo poll fails
Calling undo in from Python background-mode would raise an exception
without any information about how to initialize undo.
===================================================================
M source/blender/editors/undo/ed_undo.c
===================================================================
diff --git a/source/blender/editors/undo/ed_undo.c
b/source/blender/editors/undo/ed_undo.c
index 3e0029156c1..84d5d3b9aae 100644
--- a/source/blender/editors/undo/ed_undo.c
+++ b/source/blender/editors/undo/ed_undo.c
@@ -574,7 +574,12 @@ static bool ed_undo_is_init_poll(bContext *C)
{
wmWindowManager *wm = CTX_wm_manager(C);
if (wm->undo_stack == NULL) {
- CTX_wm_operator_poll_msg_set(C, "Undo disabled at startup");
+ /* This message is intended for Python developers,
+ * it will be part of the exception when attempting to call undo in
background mode. */
+ CTX_wm_operator_poll_msg_set(
+ C,
+ "Undo disabled at startup in background-mode. "
+ "Call `ed.undo_push()` to explicitly initialize the undo-system.");
return false;
}
return true;
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