From 8a4c812ede5b01a8e71082c1ff4ebfcbf1bd515f Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Sun, 25 Jul 2021 14:36:05 +0200
Subject: patch 8.2.3218: when using xchaha20 crypt undo file is not removed

Problem:    When using xchaha20 crypt undo file is not removed.
Solution:   Reset 'undofile' and delete the file. (Christian Brabandt,
            closes #8630, closes #8467)
---
 src/undo.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'src/undo.c')

diff --git a/src/undo.c b/src/undo.c
index 331c1e676..171e81776 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -3669,6 +3669,28 @@ f_undofile(typval_T *argvars UNUSED, typval_T *rettv)
     rettv->vval.v_string = NULL;
 #endif
 }
+#ifdef FEAT_PERSISTENT_UNDO
+/*
+ * Reset undofile option and delete the undofile
+ */
+    void
+u_undofile_reset_and_delete(buf_T *buf)
+{
+    char_u *file_name;
+
+    if (!buf->b_p_udf)
+	return;
+
+    file_name = u_get_undo_file_name(buf->b_ffname, TRUE);
+    if (file_name != NULL)
+    {
+	mch_remove(file_name);
+	vim_free(file_name);
+    }
+
+    set_option_value((char_u *)"undofile", 0L, NULL, OPT_LOCAL);
+}
+ #endif
 
 /*
  * "undotree()" function
-- 
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