Add new command 'imenu-flush-cache'

* lisp/imenu.el (imenu-flush-cache): New command (bug#20589).

2 files changed, 12 insertions, 1 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 672260ca82b..cf2ae19ce73 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -660,8 +660,13 @@ Rcirc will use the default 'completion-at-point' mechanism.  The
 conventional IRC behaviour of completing by cycling through the
 available options can be restored by enabling this option.
 
+** imenu
+
 +++
-** 'imenu' is now bound to 'M-g i' globally.
+*** 'imenu' is now bound to 'M-g i' globally.
+
+---
+*** New command 'imenu-flush-cache'.
 
 * Editing Changes in Emacs 29.1
 
diff --git a/lisp/imenu.el b/lisp/imenu.el
index a87860f0065..e452b1bb8b9 100644
--- a/lisp/imenu.el
+++ b/lisp/imenu.el
@@ -899,6 +899,12 @@ for more information."
       (`(,name . ,pos) (imenu (list name pos imenu-default-goto-function)))
       (_ (error "Unknown imenu item: %S" index-item)))))
 
+(defun imenu-flush-cache ()
+  "Flush the current imenu cache."
+  (interactive)
+  (setq imenu--index-alist nil)
+  (message "Flushed the imenu cache"))
+
 (provide 'imenu)
 
 ;;; imenu.el ends here