Add new interactive command comint-clear-buffer

The command clears the entire comint buffer. It's bound to C-c M-o.

2 files changed, 11 insertions, 0 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index d401852eeeb..7e7bbb7486a 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2015-02-24  Bozhidar Batsov  <bozhidar@batsov.com>
+
+        * comint.el (comint-clear-buffer): New command.
+        (comint-mode-map): Bind `comint-clear-buffer' to 'C-c M-o'.
+
 2015-02-23  Pete Williamson  <petewil0@googlemail.com>  (tiny change)
 
         Use ${EXEEXT} more uniformly in makefiles
diff --git a/lisp/comint.el b/lisp/comint.el
index 30c4dda5c0f..30aece14332 100644
--- a/lisp/comint.el
+++ b/lisp/comint.el
@@ -472,6 +472,7 @@ executed once when the buffer is created."
     (define-key map "\C-c\C-\\"   'comint-quit-subjob)
     (define-key map "\C-c\C-m"    'comint-copy-old-input)
     (define-key map "\C-c\C-o"    'comint-delete-output)
+    (defile-key map "\C-c\M-o"    'comint-clear-buffer)
     (define-key map "\C-c\C-r"    'comint-show-output)
     (define-key map "\C-c\C-e"    'comint-show-maximum-output)
     (define-key map "\C-c\C-l"    'comint-dynamic-list-input-ring)
@@ -2428,6 +2429,11 @@ Sets mark to the value of point when this command is run."
            (goto-char (field-beginning pos))
            (set-window-start (selected-window) (point))))))
 
+(defun comint-clear-buffer ()
+  "Clear the comint buffer."
+  (interactive)
+  (let ((comint-buffer-maximum-size 0))
+    (comint-truncate-buffer)))
 
 (defun comint-interrupt-subjob ()
   "Interrupt the current subjob.