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230 lines
8.0 KiB
EmacsLisp
230 lines
8.0 KiB
EmacsLisp
;;; unrmail.el --- convert Rmail files to mailbox files
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;;; Copyright (C) 1992, 2002 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: mail
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(defvar command-line-args-left) ;Avoid 'free variable' warning
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;;;###autoload
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(defun batch-unrmail ()
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"Convert Rmail files to system inbox format.
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Specify the input Rmail file names as command line arguments.
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For each Rmail file, the corresponding output file name
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is made by adding `.mail' at the end.
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For example, invoke `emacs -batch -f batch-unrmail RMAIL'."
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;; command-line-args-left is what is left of the command line (from startup.el)
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(if (not noninteractive)
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(error "`batch-unrmail' is to be used only with -batch"))
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(let ((error nil))
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(while command-line-args-left
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(or (unrmail (car command-line-args-left)
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(concat (car command-line-args-left) ".mail"))
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(setq error t))
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(setq command-line-args-left (cdr command-line-args-left)))
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(message "Done")
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(kill-emacs (if error 1 0))))
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;;;###autoload
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(defun unrmail (file to-file)
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"Convert Rmail file FILE to system inbox format file TO-FILE."
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(interactive "fUnrmail (rmail file): \nFUnrmail into (new mailbox file): ")
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(with-temp-buffer
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;; Read in the old Rmail file with no decoding.
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(let ((coding-system-for-read 'raw-text))
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(insert-file-contents file))
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;; But make it multibyte.
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(set-buffer-multibyte t)
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(if (not (looking-at "BABYL OPTIONS"))
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(error "This file is not in Babyl format"))
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;; Decode the file contents just as Rmail did.
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(let ((modifiedp (buffer-modified-p))
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(coding-system rmail-file-coding-system)
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from to)
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(goto-char (point-min))
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(search-forward "\n\^_" nil t) ; Skip BABYL header.
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(setq from (point))
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(goto-char (point-max))
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(search-backward "\n\^_" from 'mv)
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(setq to (point))
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(unless (and coding-system
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(coding-system-p coding-system))
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(setq coding-system
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;; Emacs 21.1 and later writes RMAIL files in emacs-mule, but
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;; earlier versions did that with the current buffer's encoding.
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;; So we want to favor detection of emacs-mule (whose normal
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;; priority is quite low), but still allow detection of other
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;; encodings if emacs-mule won't fit. The call to
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;; detect-coding-with-priority below achieves that.
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(car (detect-coding-with-priority
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from to
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'((coding-category-emacs-mule . emacs-mule))))))
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(unless (memq coding-system
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'(undecided undecided-unix))
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(set-buffer-modified-p t) ; avoid locking when decoding
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(let ((buffer-undo-list t))
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(decode-coding-region from to coding-system))
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(setq coding-system last-coding-system-used))
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(setq buffer-file-coding-system nil)
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;; We currently don't use this value, but maybe we should.
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(setq save-buffer-coding-system
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(or coding-system 'undecided)))
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;; Default the directory of TO-FILE based on where FILE is.
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(setq to-file (expand-file-name to-file default-directory))
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(condition-case ()
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(delete-file to-file)
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(file-error nil))
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(message "Writing messages to %s..." to-file)
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(goto-char (point-min))
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(let ((temp-buffer (get-buffer-create " unrmail"))
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(from-buffer (current-buffer)))
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;; Process the messages one by one.
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(while (search-forward "\^_\^l" nil t)
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(let ((beg (point))
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(end (save-excursion
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(if (search-forward "\^_" nil t)
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(1- (point)) (point-max))))
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(coding 'raw-text)
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label-line attrs keywords
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mail-from reformatted)
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(with-current-buffer temp-buffer
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(setq buffer-undo-list t)
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(erase-buffer)
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(setq buffer-file-coding-system coding)
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(insert-buffer-substring from-buffer beg end)
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(goto-char (point-min))
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(forward-line 1)
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;; Record whether the header is reformatted.
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(setq reformatted (= (following-char) ?1))
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;; Collect the label line, then get the attributes
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;; and the keywords from it.
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(setq label-line
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(buffer-substring (point)
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(save-excursion (forward-line 1)
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(point))))
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(search-forward ",,")
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(unless (eolp)
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(setq keywords
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(buffer-substring (point)
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(progn (end-of-line)
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(1- (point)))))
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(setq keywords
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(replace-regexp-in-string ", " "," keywords)))
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(setq attrs
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(list
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(if (string-match ", answered," label-line) ?A ?-)
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(if (string-match ", deleted," label-line) ?D ?-)
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(if (string-match ", edited," label-line) ?E ?-)
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(if (string-match ", filed," label-line) ?F ?-)
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(if (string-match ", resent," label-line) ?R ?-)
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(if (string-match ", unseen," label-line) ?\ ?-)
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(if (string-match ", stored," label-line) ?S ?-)))
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;; Delete the special Babyl lines at the start,
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;; and the ***EOOH*** line, and the reformatted header if any.
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(goto-char (point-min))
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(if reformatted
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(progn
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(forward-line 2)
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;; Delete Summary-Line headers.
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(let ((case-fold-search t))
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(while (looking-at "Summary-Line:")
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(forward-line 1)))
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(delete-region (point-min) (point))
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;; Delete the old reformatted header.
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(re-search-forward "^[*][*][*] EOOH [*][*][*]\n")
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(forward-line -1)
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(let ((start (point)))
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(search-forward "\n\n")
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(delete-region start (point))))
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;; Not reformatted. Delete the special
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;; lines before the real header.
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(re-search-forward "^[*][*][*] EOOH [*][*][*]\n")
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(delete-region (point-min) (point)))
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;; Some operations on the message header itself.
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(goto-char (point-min))
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(save-restriction
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(narrow-to-region
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(point-min)
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(save-excursion (search-forward "\n\n" nil 'move) (point)))
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;; Fetch or construct what we should use in the `From ' line.
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(setq mail-from
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(or (mail-fetch-field "Mail-From")
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(concat "From "
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(mail-strip-quoted-names (or (mail-fetch-field "from")
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(mail-fetch-field "really-from")
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(mail-fetch-field "sender")
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"unknown"))
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" " (current-time-string))))
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;; If the message specifies a coding system, use it.
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(let ((maybe-coding (mail-fetch-field "X-Coding-System")))
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(if maybe-coding
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(setq coding (intern maybe-coding))))
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;; Delete the Mail-From: header field if any.
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(when (re-search-forward "^Mail-from:" nil t)
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(beginning-of-line)
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(delete-region (point)
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(progn (forward-line 1) (point)))))
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(goto-char (point-min))
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;; Insert the `From ' line.
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(insert mail-from "\n")
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;; Record the keywords and attributes in our special way.
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(insert "X-BABYL-V6-ATTRIBUTES: " (apply 'string attrs) "\n")
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(when keywords
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(insert "X-BABYL-V6-KEYWORDS: " keywords "\n"))
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(goto-char (point-min))
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;; ``Quote'' "\nFrom " as "\n>From "
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;; (note that this isn't really quoting, as there is no requirement
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;; that "\n[>]+From " be quoted in the same transparent way.)
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(let ((case-fold-search nil))
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(while (search-forward "\nFrom " nil t)
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(forward-char -5)
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(insert ?>)))
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;; Write it to the output file.
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(write-region (point-min) (point-max) to-file t
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'nomsg))))
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(kill-buffer temp-buffer))
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(message "Writing messages to %s...done" to-file)))
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(provide 'unrmail)
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;;; unrmail.el ends here
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;;; arch-tag: 14c6290d-60b2-456f-8909-5c2387de6acb
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