diff options
author | Stefan Kangas <stefankangas@gmail.com> | 2020-05-26 04:56:56 +0200 |
---|---|---|
committer | Stefan Kangas <stefankangas@gmail.com> | 2020-05-26 04:56:56 +0200 |
commit | 8b940dac32c2a37f93b8670751a0e5f72ec86cea (patch) | |
tree | 4d24dbaed7051a56a2ec191e26d90ec77e333f97 /lisp/obsolete | |
parent | 3f66908ee0821d638ec9bf4360400cbd2e58f70a (diff) | |
download | emacs-8b940dac32c2a37f93b8670751a0e5f72ec86cea.tar.gz |
Mark metamail.el as obsolete (Bug#41388)
The metamail package was last released in 1994, and has been removed
from most GNU/Linux distributions due to being buggy and unmaintained.
* lisp/mail/metamail.el: Move from here...
* lisp/obsolete/metamail.el: ...to here.
* etc/NEWS: Mention its obsoletion.
Diffstat (limited to 'lisp/obsolete')
-rw-r--r-- | lisp/obsolete/metamail.el | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/lisp/obsolete/metamail.el b/lisp/obsolete/metamail.el new file mode 100644 index 00000000000..d6ab4a3d0cf --- /dev/null +++ b/lisp/obsolete/metamail.el @@ -0,0 +1,203 @@ +;;; metamail.el --- Metamail interface for GNU Emacs + +;; Copyright (C) 1993, 1996, 2001-2020 Free Software Foundation, Inc. + +;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp> +;; Keywords: mail, news, mime, multimedia +;; Obsolete-since: 28.1 + +;; 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 <https://www.gnu.org/licenses/>. + +;;; Commentary: + +;; Note: Metamail does not have all the options which are compatible with +;; the environment variables. For that reason, metamail.el has to +;; hack the environment variables. In addition, there is no way to +;; display all header fields without extra informative body messages +;; which are suppressed by the "-q" option. + +;; The idea of using metamail to process MIME messages is from +;; gnus-mime.el by Spike <Spike@world.std.com>. + +;;; Code: + +(defvar rmail-current-message) +(defvar rmail-message-vector) + +(defgroup metamail nil + "Metamail interface for Emacs." + :group 'mail + :group 'processes) + +(defcustom metamail-program-name "metamail" + "Metamail program name." + :type 'string + :group 'metamail) + +(defcustom metamail-mailer-name "emacs" + "Mailer name set to MM_MAILER environment variable." + :type 'string + :group 'metamail) + +(defvar metamail-environment '("KEYHEADS=*" "MM_QUIET=1") + "Environment variables passed to `metamail'. +It must be a list of strings that have the format ENVVARNAME=VALUE. +It is not expected to be altered globally by `set' or `setq'. +Instead, change its value temporary using `let' or `let*' form.") + +(defcustom metamail-switches '("-x" "-d" "-z") + "Switches for `metamail' program. +`-z' is required to remove zap file. +It is not expected to be altered globally by `set' or `setq'. +Instead, change its value temporary using `let' or `let*' form. +`-m MAILER' argument is automatically generated from the +`metamail-mailer-name' variable." + :type '(repeat (string :tag "Switch")) + :group 'metamail) + +;;;###autoload +(defun metamail-interpret-header () + "Interpret a header part of a MIME message in current buffer. +Its body part is not interpreted at all." + (interactive) + (save-excursion + (let* ((buffer-read-only nil) + (metamail-switches ;Inhibit processing an empty body. + (append metamail-switches '("-c" "text/plain" "-E" "7bit"))) + (end (progn + (goto-char (point-min)) + (search-forward "\n\n" nil 'move) + ;; An extra newline is inserted by metamail if there + ;; is no body part. So, insert a dummy body by + ;; itself. + (insert "\n") + (point)))) + (metamail-region (point-min) end nil nil 'nodisplay) + ;; Remove an extra newline inserted by myself. + (goto-char (point-min)) + (if (search-forward "\n\n\n" nil t) + (delete-char -1)) + ))) + +;;;###autoload +(defun metamail-interpret-body (&optional viewmode nodisplay) + "Interpret a body part of a MIME message in current buffer. +Optional argument VIEWMODE specifies the value of the +EMACS_VIEW_MODE environment variable (defaulted to 1). +Optional argument NODISPLAY non-nil means buffer is not +redisplayed as output is inserted. +Its header part is not interpreted at all." + (interactive "p") + (save-excursion + (let ((contype nil) + (encoding nil) + (end (progn + (goto-char (point-min)) + (search-forward "\n\n" nil t) + (point)))) + ;; Find Content-Type and Content-Transfer-Encoding from the header. + (save-restriction + (narrow-to-region (point-min) end) + (setq contype + (or (mail-fetch-field "Content-Type") "text/plain")) + (setq encoding + (or (mail-fetch-field "Content-Transfer-Encoding") "7bit"))) + ;; Interpret the body part only. + (let ((metamail-switches ;Process body part only. + (append metamail-switches + (list "-b" "-c" contype "-E" encoding)))) + (metamail-region end (point-max) viewmode nil nodisplay)) + ;; This mode specific hack is no longer appropriate in mbox Rmail. + ;; Pre-mbox, we have just modified the actual folder, so we + ;; update the message-vector with the new end position of the + ;; current message. In mbox Rmail, all we have done is modify a + ;; display copy of the message. Note also that point-max is a + ;; marker in the wrong buffer: the message-vector contains + ;; markers in rmail-view-buffer (which is not in rmail-mode). + ;; So this hack actually breaks the message-vector. + ;; If you're calling this on the actual rmail-view-buffer (or a + ;; non-swapped rmail-buffer), you would still need this hack. + ;; But you're not going to do that. +;;; (cond ((eq major-mode 'rmail-mode) +;;; ;; Adjust the marker of this message if in Rmail mode buffer. +;;; (set-marker (aref rmail-message-vector (1+ rmail-current-message)) +;;; (point-max)))) + ))) + +;;;###autoload +(defun metamail-buffer (&optional viewmode buffer nodisplay) + "Process current buffer through `metamail'. +Optional argument VIEWMODE specifies the value of the +EMACS_VIEW_MODE environment variable (defaulted to 1). +Optional argument BUFFER specifies a buffer to be filled (nil +means current). +Optional argument NODISPLAY non-nil means buffer is not +redisplayed as output is inserted." + (interactive "p") + (metamail-region (point-min) (point-max) viewmode buffer nodisplay)) + +;;;###autoload +(defun metamail-region (beg end &optional viewmode buffer nodisplay) + "Process current region through `metamail'. +Optional argument VIEWMODE specifies the value of the +EMACS_VIEW_MODE environment variable (defaulted to 1). +Optional argument BUFFER specifies a buffer to be filled (nil +means current). +Optional argument NODISPLAY non-nil means buffer is not +redisplayed as output is inserted." + (interactive "r\np") + (let ((curbuf (current-buffer)) + (buffer-read-only nil) + (metafile (make-temp-file "metamail")) + (option-environment + (list (format "EMACS_VIEW_MODE=%d" + (if (numberp viewmode) viewmode 1))))) + (save-excursion + ;; Gee! Metamail does not output to stdout if input comes from + ;; stdin. + (let ((selective-display nil)) ;Disable ^M to nl translation. + (write-region beg end metafile nil 'nomessage)) + (if buffer + (set-buffer buffer)) + (setq buffer-read-only nil) + ;; Clear destination buffer. + (if (eq curbuf (current-buffer)) + (delete-region beg end) + (delete-region (point-min) (point-max))) + ;; We have to pass the environment variable KEYHEADS to display + ;; all header fields. Metamail should have an optional argument + ;; to pass such information directly. + (let ((process-environment + (append process-environment + metamail-environment option-environment)) + (coding-system-for-read 'undecided)) + (apply (function call-process) + metamail-program-name + nil + t ;Output to current buffer + (not nodisplay) ;Force redisplay + (append metamail-switches + (list "-m" (or metamail-mailer-name "emacs")) + (list metafile)))) + ;; `metamail' may not delete the temporary file! + (condition-case error + (delete-file metafile) + (error nil)) + ))) + +(provide 'metamail) + +;;; metamail.el ends here |