Function: wdired-do-renames

wdired-do-renames is a byte-compiled function defined in wdired.el.gz.

Signature

(wdired-do-renames RENAMES)

Documentation

Perform RENAMES in parallel.

Source Code

;; Defined in /usr/src/emacs/lisp/wdired.el.gz
(defun wdired-do-renames (renames)
  "Perform RENAMES in parallel."
  (let* ((residue ())
         (progress nil)
         (errors 0)
         (total (1- (length renames)))
         (prep (make-progress-reporter "Renaming" 0 total))
         (overwrite (or (not wdired-confirm-overwrite) 1)))
    (while (or renames
               ;; We've done one round through the renames, we have found
               ;; some residue, but we also made some progress, so maybe
               ;; some of the residue were resolved: try again.
               (prog1 (setq renames residue)
                 (setq progress nil)
                 (setq residue nil)))
      (progress-reporter-update prep (- total (length renames)))
      (let* ((rename (pop renames))
             (file-new (cdr rename)))
        (cond
         ((rassoc file-new renames)
          (error "Trying to rename 2 files to the same name"))
         ((assoc file-new renames)
          ;; Renaming to a file name that already exists but will itself be
          ;; renamed as well.  Let's wait until that one gets renamed.
          (push rename residue))
         ((and (assoc file-new residue)
               ;; Make sure the file really exists: if it doesn't it's
               ;; not really a conflict.  It might be a temp-file generated
               ;; specifically to break a circular renaming.
               (file-exists-p file-new))
          ;; Renaming to a file name that already exists, needed to be renamed,
          ;; but whose renaming could not be performed right away.
          (if (or progress renames)
              ;; There's still a chance the conflict will be resolved.
              (push rename residue)
            ;; We have not made any progress and we've reached the end of
            ;; the renames, so we really have a circular conflict, and we
            ;; have to forcefully break the cycle.
            (message "Circular renaming: using temporary file name")
            (let ((tmp (make-temp-name file-new)))
              (push (cons (car rename) tmp) renames)
              (push (cons tmp file-new) residue))))
         (t
          (setq progress t)
          (let ((file-ori (car rename)))
            (if wdired-use-interactive-rename
                (wdired-search-and-rename file-ori file-new)
              ;; If dired-rename-file autoloads dired-aux while
              ;; dired-backup-overwrite is locally bound,
              ;; dired-backup-overwrite won't be initialized.
              ;; So we must ensure dired-aux is loaded.
              (require 'dired-aux)
              (condition-case err
                  (dlet ((dired-backup-overwrite nil))
                    (and wdired-create-parent-directories
                         (wdired-create-parentdirs file-new))
                    (dired-rename-file file-ori file-new
                                       overwrite))
                (error
                 (setq errors (1+ errors))
                 (dired-log "Rename `%s' to `%s' failed:\n%s\n"
                            file-ori file-new
                            err)))))))))
    (progress-reporter-done prep)
    errors))