int history_delete_duplicates;
+/* Non-nil means add new input to history. */
+
+Lisp_Object Vhistory_add_new_input;
+
/* Fread_minibuffer leaves the input here as a string. */
Lisp_Object last_minibuf_string;
histstring = Qnil;
/* Add the value to the appropriate history list, if any. */
- if (SYMBOLP (Vminibuffer_history_variable)
+ if (!NILP (Vhistory_add_new_input)
+ && SYMBOLP (Vminibuffer_history_variable)
&& !NILP (histstring))
{
/* If the caller wanted to save the value read on a history list,
DEFVAR_BOOL ("history-delete-duplicates", &history_delete_duplicates,
doc: /* *Non-nil means to delete duplicates in history.
If set to t when adding a new history element, all previous identical
-elements are deleted. */);
+elements are deleted from the history list. */);
history_delete_duplicates = 0;
+ DEFVAR_LISP ("history-add-new-input", &Vhistory_add_new_input,
+ doc: /* *Non-nil means to add new elements in history.
+If set to nil, minibuffer reading functions don't add new elements to the
+history list, so it is possible to do this afterwards by calling
+`add-to-history' explicitly. */);
+ Vhistory_add_new_input = Qt;
+
DEFVAR_LISP ("completion-auto-help", &Vcompletion_auto_help,
doc: /* *Non-nil means automatically provide help for invalid completion input.
Under Partial Completion mode, a non-nil, non-t value has a special meaning;