-(defvar epa-mail-group-alist nil
- "Alist of GnuPG mail groups (`group' commands in `.gnupg/gpg.conf').
-Each element has the form (GROUPNAME ADDRESSES...).
-t means the list is not yet read in.")
-
-(defvar epa-mail-group-modtime nil
- "The modification time of `~/.gnupg/gpg.conf' file when last examined.")
-
-(defvar epa-mail-gnupg-conf-file "~/.gnupg/gpg.conf"
- "File name of GnuPG configuration file that specifies recipient groups.")
-
-(defun epa-mail-parse-groups ()
- "Parse `~/.gnupg/gpg.conf' and set `epa-mail-group-alist' from it."
- (let (aliases)
- (with-temp-buffer
- (insert-file-contents-literally epa-mail-gnupg-conf-file)
-
- (while (re-search-forward "^[ \t]*group[ \t]*" nil t)
- (if (looking-at "\\([^= \t]+\\)[ \t]*=[ \t]*\\([^ \t\n]+\\)")
- (push (cons (match-string-no-properties 1)
- (split-string (match-string-no-properties 2)))
- aliases))))
- (setq epa-mail-group-alist aliases)))
-
-(defun epa-mail-sync-groups ()
- "Update GnuPG groups from file if necessary."
- (if (file-exists-p epa-mail-gnupg-conf-file)
- (let ((modtime (nth 5 (file-attributes epa-mail-gnupg-conf-file))))
- (if (not (equal epa-mail-group-modtime modtime))
- (progn
- (setq epa-mail-group-modtime modtime)
- (epa-mail-parse-groups))))
- (setq epa-mail-group-alist nil)))
-
-(defun epa-mail-expand-recipient-1 (recipient)
- "Expand RECIPIENT once thru `epa-mail-group-alist'.
-Returns the list of names it stands for, or nil if it isn't a group."
- ;; Load the alias list if not loaded before.
- (let (alist-elt)
- (setq alist-elt (assoc recipient epa-mail-group-alist))
- (cdr alist-elt)))
-
-(defun epa-mail-expand-recipients-2 (recipients)
- "Expand list RECIPIENTS once thru `epa-mail-group-alist'.
-Returns the list of names they stand for."
- ;; Load the alias list if not loaded before.
- (let (output)
- (dolist (r recipients)
- (let ((expanded (epa-mail-expand-recipient-1 r)))
- (if expanded
- (dolist (xr expanded)
- (unless (member xr output)
- (push xr output)))
- (unless (member r output)
- (push r output)))))
- (nreverse output)))
-
-(defun epa-mail-expand-recipients (recipients)
- "Expand RECIPIENTS thru `epa-mail-group-alist' until it stops changing."
- (epa-mail-sync-groups)
- (while (not (equal recipients
- (setq recipients
- (epa-mail-expand-recipients-2 recipients)))))
- recipients)
-