1 ;;; epa-hook.el --- preloaded code to enable epa-file.el -*- lexical-binding: t -*-
2 ;; Copyright (C) 2006-2011 Free Software Foundation, Inc.
4 ;; Author: Daiki Ueno <ueno@unixuser.org>
5 ;; Keywords: PGP, GnuPG
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 (defgroup epa-file nil
26 "The EasyPG Assistant hooks for transparent file encryption"
30 (defun epa-file--file-name-regexp-set (variable value)
31 (set-default variable value)
32 (if (fboundp 'epa-file-name-regexp-update)
33 (epa-file-name-regexp-update)))
35 (defcustom epa-file-name-regexp (purecopy "\\.gpg\\(~\\|\\.~[0-9]+~\\)?\\'")
36 "Regexp which matches filenames to be encrypted with GnuPG.
38 If you set this outside Custom while epa-file is already enabled, you
39 have to call `epa-file-name-regexp-update' after setting it to
40 properly update file-name-handler-alist. Setting this through Custom
41 does that automatically."
44 :set 'epa-file--file-name-regexp-set)
46 (defcustom epa-file-inhibit-auto-save t
47 "If non-nil, disable auto-saving when opening an encrypted file."
51 (defvar epa-file-encrypt-to nil
52 "*Recipient(s) used for encrypting files.
53 May either be a string or a list of strings.")
55 (put 'epa-file-encrypt-to 'safe-local-variable
66 (put 'epa-file-encrypt-to 'permanent-local t)
68 (defvar epa-file-handler
69 (cons epa-file-name-regexp 'epa-file-handler))
71 (defvar epa-file-auto-mode-alist-entry
72 (list epa-file-name-regexp nil 'epa-file))
74 (defun epa-file-name-regexp-update ()
76 (unless (equal (car epa-file-handler) epa-file-name-regexp)
77 (setcar epa-file-handler epa-file-name-regexp)))
79 (defun epa-file-find-file-hook ()
80 (if (and buffer-file-name
81 (string-match epa-file-name-regexp buffer-file-name)
82 epa-file-inhibit-auto-save)
85 (define-minor-mode auto-encryption-mode
86 "Toggle automatic file encryption and decryption.
87 With prefix argument ARG, turn auto encryption on if positive, else off.
88 Return the new status of auto encryption (non-nil means on)."
89 :global t :init-value t :group 'epa-file :version "23.1"
90 ;; We'd like to use custom-initialize-set here so the setup is done
91 ;; before dumping, but at the point where the defcustom is evaluated,
92 ;; the corresponding function isn't defined yet, so
93 ;; custom-initialize-set signals an error.
94 :initialize 'custom-initialize-delay
95 (setq file-name-handler-alist
96 (delq epa-file-handler file-name-handler-alist))
97 (remove-hook 'find-file-hooks 'epa-file-find-file-hook)
98 (setq auto-mode-alist (delq epa-file-auto-mode-alist-entry
100 (when auto-encryption-mode
101 (setq file-name-handler-alist
102 (cons epa-file-handler file-name-handler-alist))
103 (add-hook 'find-file-hook 'epa-file-find-file-hook)
104 (setq auto-mode-alist (cons epa-file-auto-mode-alist-entry
107 (put 'epa-file-handler 'safe-magic t)
108 (put 'epa-file-handler 'operations '(write-region insert-file-contents))
112 ;;; epa-hook.el ends here