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- ;;; mailalias.el --- expand and complete mailing address aliases
-
- ;; Copyright (C) 1985, 1987, 1995, 1996 Free Software Foundation, Inc.
-
- ;; Maintainer: FSF
- ;; Keywords: mail
-
- ;; 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 2, 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; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; Basic functions for defining and expanding mail aliases.
- ;; These seal off the interface to the alias-definition parts of a
- ;; .mailrc file formatted for BSD's Mail or USL's mailx.
-
- ;;; Code:
-
- (require 'sendmail)
-
- (defvar mail-names t
- "Alist of local users, aliases and directory entries as available.
- When t this still needs to be initialized.
- This is the basis for `mail-complete'.")
-
- (defvar mail-local-names t
- "Alist of local users.
- When t this still needs to be initialized.")
-
- (defvar mail-directory-names t
- "Alist of mail address directory entries.
- When t this still needs to be initialized.")
-
- (defvar mail-address-field-regexp
- "^\\(Resent-\\)?\\(To\\|From\\|CC\\|BCC\\|Reply-to\\):")
-
- (defvar mail-complete-alist
- `((,mail-address-field-regexp mail-get-names pattern)
- ("Newsgroups:" . (if (boundp 'gnus-active-hashtb)
- gnus-active-hashtb
- (if (boundp news-group-article-assoc)
- news-group-article-assoc)))
- ("Followup-To:" . (mail-sentto-newsgroups))
- ;;("Distribution:" ???)
- )
- "Alist of header field and expression to return alist for completion.
- Expression may reference variable `pattern' which is the string being completed.
- If not on matching header, `mail-complete-function' gets called instead.")
-
- (defvar mail-complete-function 'ispell-complete-word
- "Function to call when completing outside `mail-complete-alist'-header.")
-
-
- (defvar mail-directory-function nil
- "Function to get completions from directory service or `nil' for none.
- See `mail-directory-requery'.")
-
-
- ;; This is for when the directory is huge, or changes frequently.
- (defvar mail-directory-requery nil
- "When non-`nil' call `mail-directory-function' for each completion.
- In that case, one argument gets passed to the function, the partial string
- entered so far.")
-
-
- (defvar mail-directory-process nil
- "Unix command when `mail-directory-function' is `mail-directory-process'.
- This is a list of the form (COMMAND ARG ...), where each of the list elements
- is evaluated. When `mail-directory-requery' is non-`nil', during
- evaluation the variable `pattern' contains the partial input being completed.
- This might look like
-
- '(remote-shell-program \"HOST\" \"-nl\" \"USER\" \"COMMAND\")
-
- or
-
- '(remote-shell-program \"HOST\" \"-n\" \"COMMAND '^\" pattern \"'\")")
-
- (defvar mail-directory-stream ()
- "List of (HOST SERVICE) for stream connection to mail directory.")
-
- (defvar mail-directory-parser nil
- "How to interpret the output of `mail-directory-function'.
- Three types of values are possible:
-
- - nil means to gather each line as one name
- - regexp means first \\(grouping\\) in successive matches is name
- - function called at beginning of buffer that returns an alist of names")
-
-
- ;; Called from sendmail-send-it, or similar functions,
- ;; only if some mail aliases are defined.
- (defun expand-mail-aliases (beg end &optional exclude)
- "Expand all mail aliases in suitable header fields found between BEG and END.
- Suitable header fields are `To', `From', `CC' and `BCC', `Reply-to', and
- their `Resent-' variants.
-
- Optional second arg EXCLUDE may be a regular expression defining text to be
- removed from alias expansions."
- (sendmail-sync-aliases)
- (if (eq mail-aliases t)
- (progn (setq mail-aliases nil) (build-mail-aliases)))
- (goto-char beg)
- (setq end (set-marker (make-marker) end))
- (let ((case-fold-search nil))
- (while (let ((case-fold-search t))
- (re-search-forward mail-address-field-regexp end t))
- (skip-chars-forward " \t")
- (let ((beg1 (point))
- end1 pos epos seplen
- ;; DISABLED-ALIASES records aliases temporarily disabled
- ;; while we scan text that resulted from expanding those aliases.
- ;; Each element is (ALIAS . TILL-WHEN), where TILL-WHEN
- ;; is where to reenable the alias (expressed as number of chars
- ;; counting from END1).
- (disabled-aliases nil))
- (re-search-forward "^[^ \t]" end 'move)
- (beginning-of-line)
- (skip-chars-backward " \t\n")
- (setq end1 (point-marker))
- (goto-char beg1)
- (while (< (point) end1)
- (setq pos (point))
- ;; Reenable any aliases which were disabled for ranges
- ;; that we have passed out of.
- (while (and disabled-aliases (> pos (- end1 (cdr (car disabled-aliases)))))
- (setq disabled-aliases (cdr disabled-aliases)))
- ;; EPOS gets position of end of next name;
- ;; SEPLEN gets length of whitespace&separator that follows it.
- (if (re-search-forward "[ \t]*[\n,][ \t]*" end1 t)
- (setq epos (match-beginning 0)
- seplen (- (point) epos))
- (setq epos (marker-position end1) seplen 0))
- (let (translation
- (string (buffer-substring-no-properties pos epos)))
- (if (and (not (assoc string disabled-aliases))
- (setq translation
- (cdr (assoc string mail-aliases))))
- (progn
- ;; This name is an alias. Disable it.
- (setq disabled-aliases (cons (cons string (- end1 epos))
- disabled-aliases))
- ;; Replace the alias with its expansion
- ;; then rescan the expansion for more aliases.
- (goto-char pos)
- (insert translation)
- (if exclude
- (let ((regexp
- (concat "\\b\\(" exclude "\\)\\b"))
- (end (point-marker)))
- (goto-char pos)
- (while (re-search-forward regexp end t)
- (replace-match ""))
- (goto-char end)))
- (delete-region (point) (+ (point) (- epos pos)))
- (goto-char pos))
- ;; Name is not an alias. Skip to start of next name.
- (goto-char epos)
- (forward-char seplen))))
- (set-marker end1 nil)))
- (set-marker end nil)))
-
- ;; Called by mail-setup, or similar functions, only if the file specified
- ;; by mail-personal-alias-file (usually `~/.mailrc') exists.
- (defun build-mail-aliases (&optional file)
- "Read mail aliases from personal aliases file and set `mail-aliases'.
- By default, this is the file specified by `mail-personal-alias-file'."
- (setq file (expand-file-name (or file mail-personal-alias-file)))
- (let ((buffer nil)
- (obuf (current-buffer)))
- (unwind-protect
- (progn
- (setq buffer (generate-new-buffer " mailrc"))
- (set-buffer buffer)
- (while file
- (cond ((get-file-buffer file)
- (insert (save-excursion
- (set-buffer (get-file-buffer file))
- (buffer-substring-no-properties
- (point-min) (point-max)))))
- ((file-exists-p file) (insert-file-contents file))
- ((file-exists-p (setq file (concat "~/" file)))
- (insert-file-contents file))
- (t (setq file nil)))
- ;; Don't lose if no final newline.
- (goto-char (point-max))
- (or (eq (preceding-char) ?\n) (newline))
- (goto-char (point-min))
- ;; handle "\\\n" continuation lines
- (while (not (eobp))
- (end-of-line)
- (if (= (preceding-char) ?\\)
- (progn (delete-char -1) (delete-char 1) (insert ?\ ))
- (forward-char 1)))
- (goto-char (point-min))
- ;; handle `source' directives -- Eddy/1994/May/25
- (cond ((re-search-forward "^source[ \t]+" nil t)
- (re-search-forward "\\S-+")
- (setq file (buffer-substring-no-properties
- (match-beginning 0) (match-end 0)))
- (beginning-of-line)
- (insert "# ") ; to ensure we don't re-process this file
- (beginning-of-line))
- (t (setq file nil))))
- (goto-char (point-min))
- (while (re-search-forward
- "^\\(a\\|alias\\|g\\|group\\)[ \t]+\\([^ \t]+\\)" nil t)
- (let* ((name (match-string 2))
- (start (progn (skip-chars-forward " \t") (point))))
- (end-of-line)
- (define-mail-alias
- name
- (buffer-substring-no-properties start (point))
- t)))
- mail-aliases)
- (if buffer (kill-buffer buffer))
- (set-buffer obuf))))
-
- ;; Always autoloadable in case the user wants to define aliases
- ;; interactively or in .emacs.
- ;;;###autoload
- (defun define-mail-alias (name definition &optional from-mailrc-file)
- "Define NAME as a mail alias that translates to DEFINITION.
- This means that sending a message to NAME will actually send to DEFINITION.
-
- Normally, the addresses in DEFINITION must be separated by commas.
- If FROM-MAILRC-FILE is non-nil, then addresses in DEFINITION
- can be separated by spaces; an address can contain spaces
- if it is quoted with double-quotes."
-
- (interactive "sDefine mail alias: \nsDefine %s as mail alias for: ")
- ;; Read the defaults first, if we have not done so.
- (sendmail-sync-aliases)
- (if (eq mail-aliases t)
- (progn
- (setq mail-aliases nil)
- (if (file-exists-p mail-personal-alias-file)
- (build-mail-aliases))))
- ;; strip garbage from front and end
- (if (string-match "\\`[ \t\n,]+" definition)
- (setq definition (substring definition (match-end 0))))
- (if (string-match "[ \t\n,]+\\'" definition)
- (setq definition (substring definition 0 (match-beginning 0))))
- (let ((result '())
- ;; If DEFINITION is null string, avoid looping even once.
- (start (and (not (equal definition "")) 0))
- (L (length definition))
- end tem)
- (while start
- ;; If we're reading from the mailrc file, then addresses are delimited
- ;; by spaces, and addresses with embedded spaces must be surrounded by
- ;; double-quotes. Otherwise, addresses are separated by commas.
- (if from-mailrc-file
- (if (eq ?\" (aref definition start))
- (setq start (1+ start)
- end (string-match "\"[ \t,]*" definition start))
- (setq end (string-match "[ \t,]+" definition start)))
- (setq end (string-match "[ \t\n,]*,[ \t\n,]*" definition start)))
- (setq result (cons (substring definition start end) result))
- (setq start (and end
- (/= (match-end 0) L)
- (match-end 0))))
- (setq definition (mapconcat (function identity)
- (nreverse result)
- ", "))
- (setq tem (assoc name mail-aliases))
- (if tem
- (rplacd tem definition)
- (setq mail-aliases (cons (cons name definition) mail-aliases)
- mail-names t))))
-
- ;;;###autoload
- (defun mail-complete (arg)
- "Perform completion on header field or word preceding point.
- Completable headers are according to `mail-complete-alist'. If none matches
- current header, calls `mail-complete-function' and passes prefix arg if any."
- (interactive "P")
- ;; Read the defaults first, if we have not done so.
- (sendmail-sync-aliases)
- (if (eq mail-aliases t)
- (progn
- (setq mail-aliases nil)
- (if (file-exists-p mail-personal-alias-file)
- (build-mail-aliases))))
- (let ((list mail-complete-alist))
- (if (and (save-excursion (search-forward
- (concat "\n" mail-header-separator "\n")
- nil t))
- (save-excursion
- (if (re-search-backward "^[^\t]" nil t)
- (while list
- (if (looking-at (car (car list)))
- (setq arg (cdr (car list))
- list ())
- (setq list (cdr list)))))
- arg))
- (let* ((end (point))
- (beg (save-excursion
- (skip-chars-backward "^ \t<,:")
- (point)))
- (pattern (buffer-substring beg end))
- completion)
- (setq list (eval arg)
- completion (try-completion pattern list))
- (cond ((eq completion t))
- ((null completion)
- (message "Can't find completion for \"%s\"" pattern)
- (ding))
- ((not (string= pattern completion))
- (delete-region beg end)
- (insert completion))
- (t
- (message "Making completion list...")
- (with-output-to-temp-buffer "*Completions*"
- (display-completion-list
- (all-completions pattern list)))
- (message "Making completion list...%s" "done"))))
- (funcall mail-complete-function arg))))
-
- (defun mail-get-names (pattern)
- "Fetch local users and global mail adresses for completion.
- Consults `/etc/passwd' and a directory service if one is set up via
- `mail-directory-function'."
- (if (eq mail-local-names t)
- (save-excursion
- (set-buffer (generate-new-buffer " passwd"))
- (insert-file-contents "/etc/passwd" nil nil nil t)
- (setq mail-local-names)
- (while (not (eobp))
- ;;Recognize lines like
- ;; nobody:*:65534:65534::/:
- ;; +demo::::::/bin/csh
- ;; +ethanb
- ;;while skipping
- ;; +@SOFTWARE
- (if (looking-at "\\+?\\([^:@\n+]+\\)")
- (add-to-list 'mail-local-names (list (match-string 1))))
- (beginning-of-line 2))
- (kill-buffer (current-buffer))))
- (if (or (eq mail-names t)
- (eq mail-directory-names t))
- (let (directory)
- (and mail-directory-function
- (eq mail-directory-names t)
- (setq directory
- (mail-directory (if mail-directory-requery pattern))))
- (if (or directory
- (eq mail-names t))
- (setq mail-names
- (sort (append (if (consp mail-aliases) mail-aliases)
- (if (consp mail-local-names)
- mail-local-names)
- directory)
- (lambda (a b)
- ;; should cache downcased strings
- (string< (downcase (car a))
- (downcase (car b)))))))
- (or mail-directory-requery
- (setq mail-directory-names directory))))
- mail-names)
-
-
- (defun mail-directory (pattern)
- "Call directory to get names matching PATTERN or all if `nil'.
- Calls `mail-directory-function' and applies `mail-directory-parser' to output."
- (save-excursion
- (message "Querying directory...")
- (set-buffer (generate-new-buffer " *mail-directory*"))
- (funcall mail-directory-function pattern)
- (goto-char 1)
- (let (directory)
- (if (stringp mail-directory-parser)
- (while (re-search-forward mail-directory-parser nil t)
- (setq directory
- `((,(match-string 1))
- ,@directory)))
- (if mail-directory-parser
- (setq directory (funcall mail-directory-parser))
- (while (not (eobp))
- (setq directory
- `((,(buffer-substring (point)
- (progn
- (forward-line)
- (if (bolp)
- (1- (point))
- (point)))))
- ,@directory)))))
- (kill-buffer (current-buffer))
- (message "Querying directory...done")
- directory)))
-
-
- (defun mail-directory-process (pattern)
- "Call a Unix process to output names in directory.
- See `mail-directory-process'."
- (apply 'call-process (eval (car mail-directory-process)) nil t nil
- (mapcar 'eval (cdr mail-directory-process))))
-
- ;; This should handle a dialog. Currently expects port to spit out names.
- (defun mail-directory-stream (pattern)
- "Open a stream to retrieve names in directory.
- See `mail-directory-stream'."
- (let (mailalias-done)
- (set-process-sentinel
- (apply 'open-network-stream "mailalias" (current-buffer)
- mail-directory-stream)
- (lambda (x x)
- (setq mailalias-done t)))
- (while (not mailalias-done)
- (sit-for .1))))
-
- (defun mail-sentto-newsgroups ()
- "Return all entries from Newsgroups: header as completion alist."
- (save-excursion
- (if (mail-position-on-field "newsgroups" t)
- (let ((point (point))
- list)
- (while (< (skip-chars-backward "^:, \t\n") 0)
- (setq list `((,(buffer-substring (point) point))
- ,@list))
- (skip-chars-backward ", \t\n")
- (setq point (point)))
- list))))
-
- (provide 'mailalias)
-
- ;;; mailalias.el ends here
-