Renamed lisp/epa-file-hook.el to lisp/epa-hook.el.

1 files changed, 108 insertions, 0 deletions

diff --git a/lisp/epa-hook.el b/lisp/epa-hook.el
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+;;; epa-hook.el --- preloaded code to enable epa-file.el
+;; Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
+
+;; Author: Daiki Ueno <ueno@unixuser.org>
+;; Keywords: PGP, GnuPG
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(defgroup epa-file nil
+  "The EasyPG Assistant hooks for transparent file encryption"
+  :version "23.1"
+  :group 'epa)
+
+(defun epa-file--file-name-regexp-set (variable value)
+  (set-default variable value)
+  (if (fboundp 'epa-file-name-regexp-update)
+      (epa-file-name-regexp-update)))
+
+(defcustom epa-file-name-regexp "\\.gpg\\(~\\|\\.~[0-9]+~\\)?\\'"
+  "Regexp which matches filenames to be encrypted with GnuPG.
+
+If you set this outside Custom while epa-file is already enabled, you
+have to call `epa-file-name-regexp-update' after setting it to
+properly update file-name-handler-alist.  Setting this through Custom
+does that automatically."
+  :type 'regexp
+  :group 'epa-file
+  :set 'epa-file--file-name-regexp-set)
+
+(defcustom epa-file-inhibit-auto-save t
+  "If non-nil, disable auto-saving when opening an encrypted file."
+  :type 'boolean
+  :group 'epa-file)
+
+(defvar epa-file-encrypt-to nil
+  "*Recipient(s) used for encrypting files.
+May either be a string or a list of strings.")
+
+(put 'epa-file-encrypt-to 'safe-local-variable
+     (lambda (val)
+       (or (stringp val)
+	   (and (listp val)
+		(catch 'safe
+		  (mapc (lambda (elt)
+			  (unless (stringp elt)
+			    (throw 'safe nil)))
+			val)
+		  t)))))
+
+(put 'epa-file-encrypt-to 'permanent-local t)
+
+(defvar epa-file-handler
+  (cons epa-file-name-regexp 'epa-file-handler))
+
+(defvar epa-file-auto-mode-alist-entry
+  (list epa-file-name-regexp nil 'epa-file))
+
+(defun epa-file-name-regexp-update ()
+  (interactive)
+  (unless (equal (car epa-file-handler) epa-file-name-regexp)
+    (setcar epa-file-handler epa-file-name-regexp)))
+
+(defun epa-file-find-file-hook ()
+  (if (and buffer-file-name
+	   (string-match epa-file-name-regexp buffer-file-name)
+	   epa-file-inhibit-auto-save)
+      (auto-save-mode 0))
+  (set-buffer-modified-p nil))
+
+(define-minor-mode auto-encryption-mode
+  "Toggle automatic file encryption and decryption.
+With prefix argument ARG, turn auto encryption on if positive, else off.
+Return the new status of auto encryption (non-nil means on)."
+  :global t :init-value t :group 'epa-file :version "23.1"
+  (setq file-name-handler-alist
+	(delq epa-file-handler file-name-handler-alist))
+  (remove-hook 'find-file-hooks 'epa-file-find-file-hook)
+  (setq auto-mode-alist (delq epa-file-auto-mode-alist-entry
+			      auto-mode-alist))
+  (when auto-encryption-mode
+    (setq file-name-handler-alist
+	  (cons epa-file-handler file-name-handler-alist))
+    (add-hook 'find-file-hook 'epa-file-find-file-hook)
+    (setq auto-mode-alist (cons epa-file-auto-mode-alist-entry
+				auto-mode-alist))))
+
+(put 'epa-file-handler 'safe-magic t)
+(put 'epa-file-handler 'operations '(write-region insert-file-contents))
+
+(provide 'epa-file-hook)
+
+;; arch-tag: f75c8a50-d32e-4eb3-9ec6-9e940c1fc8b5
+;;; epa-file-hook.el ends here