* cl-generic.el (cl-defmethod): Make docstring dynamic

[gnu-emacs] / lisp / dired.el

diff --git a/lisp/dired.el b/lisp/dired.el
index 2a65bd09cc5e69e19b4bba08f6ad3ffd0d638d04..5d14291d787bede4536686c12ff546bf8d87e559 100644 (file)
--- a/lisp/dired.el
+++ b/lisp/dired.el
@@ -255,6 +255,18 @@ new Dired buffers."
   :version "24.4"
   :group 'dired)
 
+(defcustom dired-always-read-filesystem nil
+  "Non-nil means revert buffers visiting files before searching them.
+ By default,  commands like `dired-mark-files-containing-regexp' will
+ search any buffers visiting the marked files without reverting them,
+ even if they were changed on disk.  When this option is non-nil, such
+ buffers are always reverted in a temporary buffer before searching
+ them: the search is performed on the temporary buffer, the original
+ buffer visiting the file is not modified."
+  :type 'boolean
+  :version "25.2"
+  :group 'dired)
+
 ;; Internal variables
 
 (defvar dired-marker-char ?*           ; the answer is 42
@@ -303,7 +315,7 @@ The directory name must be absolute, but need not be fully expanded.")
 
 (put 'dired-actual-switches 'safe-local-variable 'dired-safe-switches-p)
 
-(defvar dired-re-inode-size "[0-9 \t]*"
+(defvar dired-re-inode-size "[0-9  \t]*[.,0-9]*[BkKMGTPEZY]?[ \t]*"
   "Regexp for optional initial inode and file size as made by `ls -i -s'.")
 
 ;; These regexps must be tested at beginning-of-line, but are also
@@ -3357,7 +3369,13 @@ object files--just `.o' will mark more than you might think."
 (defun dired-mark-files-containing-regexp (regexp &optional marker-char)
   "Mark all files with contents containing REGEXP for use in later commands.
 A prefix argument means to unmark them instead.
-`.' and `..' are never marked."
+`.' and `..' are never marked.
+
+Note that if a file is visited in an Emacs buffer, and
+`dired-always-read-filesystem' is nil, this command will
+look in the buffer without revisiting the file, so the results might
+be inconsistent with the file on disk if its contents has changed
+since it was last visited."
   (interactive
    (list (read-regexp (concat (if current-prefix-arg "Unmark" "Mark")
                               " files containing (regexp): ")
@@ -3374,7 +3392,7 @@ A prefix argument means to unmark them instead.
                (message "Checking %s" fn)
                ;; For now we do it inside emacs
                ;; Grep might be better if there are a lot of files
-               (if prebuf
+               (if (and prebuf (not dired-always-read-filesystem))
                    (with-current-buffer prebuf
                      (save-excursion
                        (goto-char (point-min))