emacs: Don't back up boring files like commit messages.

[profile] / dot-emacs.el

diff --git a/dot-emacs.el b/dot-emacs.el
index 8a724ab..1b1a71c 100644 (file)
--- a/dot-emacs.el
+++ b/dot-emacs.el
@@ -1,7 +1,5 @@
 ;;; -*- mode: emacs-lisp; coding: utf-8 -*-
 ;;;
-;;; $Id$
-;;;
 ;;; Functions and macros for .emacs
 ;;;
 ;;; (c) 2004 Mark Wooding
@@ -448,7 +446,10 @@ a list of things:
 (make-variable-buffer-local 'mdw-fill-prefix)
 
 (defvar mdw-hanging-indents
-  "\\(\\(\\([*o]\\|--\\|[0-9]+\\.\\|\\[[0-9]+\\]\\|([a-zA-Z])\\)[ \t]+\\)?\\)"
+  (concat "\\(\\("
+           "\\([*o]\\|-[-#]?\\|[0-9]+\\.\\|\\[[0-9]+\\]\\|([a-zA-Z])\\)"
+           "[ \t]+"
+         "\\)?\\)")
   "*Standard regular expression matching things which might be part of a
 hanging indent.  This is mainly useful in `auto-fill-mode'.")
 
@@ -608,6 +609,26 @@ doesn't cope with anything approximating a complicated case."
 (defvar mdw-number-face 'mdw-number-face "Face to use for numbers")
 (make-face 'mdw-number-face)
 
+;; --- Backup file handling ---
+
+(defvar mdw-backup-disable-regexps nil
+  "*List of regular expressions: if a file name matches any of these then the
+file is not backed up.")
+
+(defun mdw-backup-enable-predicate (name)
+  "[mdw]'s default backup predicate: allows a backup if the
+standard predicate would allow it, and it doesn't match any of
+the regular expressions in `mdw-backup-disable-regexps'."
+  (and (normal-backup-enable-predicate name)
+       (let ((answer t) (list mdw-backup-disable-regexps))
+        (save-match-data
+          (while list
+            (if (string-match (car list) name)
+                (setq answer nil))
+            (setq list (cdr list)))
+          answer))))
+(setq backup-enable-predicate 'mdw-backup-enable-predicate)
+
 ;;;----- General fontification ----------------------------------------------
 
 (defun mdw-set-fonts (frame faces)
@@ -1280,7 +1301,7 @@ strip numbers instead."
                      "del" "elif" "else" "except" "exec" "finally" "for"
                      "from" "global" "if" "import" "in" "is" "lambda"
                      "not" "or" "pass" "print" "raise" "return" "try"
-                     "while" "yield")))
+                     "while" "with" "yield")))
     (setq font-lock-keywords
          (list