code.delx.au - gnu-emacs-elpa/blob - diff-hl-dired.el

   1 ;;; diff-hl-dired.el --- Highlight changed files in Dired -*- lexical-binding: t -*-
   2
   3 ;; This file is not part of GNU Emacs.
   4
   5 ;; This file is free software: you can redistribute it and/or modify
   6 ;; it under the terms of the GNU General Public License as published by
   7 ;; the Free Software Foundation, either version 3 of the License, or
   8 ;; (at your option) any later version.
   9
  10 ;; This file is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;; GNU General Public License for more details.
  14
  15 ;; You should have received a copy of the GNU General Public License
  16 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 ;;; Commentary:
  19
  20 ;; FIXME: Raises "Stack overflow in equal" error in Emacs 24.3.50.2
  21 ;; (at least) when changing directory.
  22 ;;
  23 ;; To enable in all Dired buffers, add this to your init file:
  24 ;;
  25 ;; (add-hook 'dired-mode-hook 'diff-hl-dired-mode)
  26
  27 ;;; Code:
  28
  29 (require 'diff-hl)
  30
  31 (define-minor-mode diff-hl-dired-mode
  32   "Toggle VC diff fringe highlighting in a Dired buffer."
  33   :lighter ""
  34   (if diff-hl-dired-mode
  35       (progn
  36         (add-hook 'dired-after-readin-hook 'diff-hl-dired-update nil t)
  37         (diff-hl-dired-update))
  38     (remove-hook 'dired-after-readin-hook 'diff-hl-dired-update t)
  39     (diff-hl-dired-clear)))
  40
  41 (defvar diff-hl-dired-process-buffer nil)
  42
  43 (defun diff-hl-dired-update ()
  44   (let ((backend (cl-loop for file in (diff-hl-dired-files)
  45                           for backend = (vc-backend file)
  46                           thereis backend))
  47         (def-dir default-directory)
  48         (buffer (current-buffer)))
  49     (diff-hl-dired-clear)
  50     (unless (buffer-live-p diff-hl-dired-process-buffer)
  51       (setq diff-hl-dired-process-buffer
  52             (generate-new-buffer " *diff-hl-dired* tmp status")))
  53     (with-current-buffer diff-hl-dired-process-buffer
  54       (setq default-directory (expand-file-name def-dir))
  55       (erase-buffer)
  56       (vc-call-backend
  57        backend 'dir-status def-dir
  58        (lambda (entries &optional more-to-come)
  59          (with-current-buffer buffer
  60            (dolist (entry entries)
  61              (cl-destructuring-bind (file state &rest) entry
  62                (let ((type (plist-get
  63                             '(edited change added insert removed delete)
  64                             state)))
  65                  (save-excursion
  66                    (goto-char (point-min))
  67                    (when (and type (dired-goto-file-1 file
  68                                                       (expand-file-name file)
  69                                                       (point-max)))
  70                      (diff-hl-add-highlighting type 'middle))))))))))))
  71
  72 (defalias 'diff-hl-dired-clear 'diff-hl-remove-overlays)
  73
  74 (defun diff-hl-dired-files ()
  75   (cl-loop for file in (directory-files default-directory)
  76            when (and (file-exists-p file)
  77                      (not (file-directory-p file)))
  78            collect (expand-file-name file)))
  79
  80 (provide 'diff-hl-dired)