(file-name-sans-extension): New function.

diff --git a/lisp/files.el b/lisp/files.el
index 085682a..bfc4aba 100644 (file)
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -1429,6 +1429,19 @@ we do not remove backup version numbers, only true file version numbers."
                         (string-match "~\\'" name)
                         (length name))))))))
 
+(defun file-name-sans-extension (filename)
+  "Return FILENAME sans final \"extension\".
+The extension, in a file name, is the part that follows the last `.'."
+  (save-match-data
+    (let ((file (file-name-sans-versions (file-name-nondirectory filename)))
+         directory)
+      (if (string-match "\\.[^.]*\\'" file)
+         (if (setq directory (file-name-directory filename))
+             (expand-file-name (substring file 0 (match-beginning 0))
+                               directory)
+           (substring file 0 (match-beginning 0)))
+       filename))))
+
 (defun make-backup-file-name (file)
   "Create the non-numeric backup file name for FILE.
 This is a separate function so you can redefine it for customization."