mirror/emacs
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-20 10:23:57 +00:00
Code Issues Releases Activity
37cc095b6a
emacs/lisp/mail/mailalias.el
Glenn Morris ceaeecb0c9 Switch license to GPLv3 or later.
2007-07-25 04:27:24 +00:00

558 lines
19 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; mailalias.el --- expand and complete mailing address aliases
;; Copyright (C) 1985, 1987, 1995, 1996, 1997, 2001, 2002, 2003,
;; 2004, 2005, 2006, 2007 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 3, 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, 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)
(defgroup mailalias nil
"Expanding mail aliases."
:group 'mail)
(defcustom mail-passwd-files '("/etc/passwd")
"*List of files from which to determine valid user names."
:type '(repeat string)
:group 'mailalias)
(defcustom mail-passwd-command nil
"*Shell command to retrieve text to add to `/etc/passwd', or nil."
:type '(choice string (const nil))
:group 'mailalias)
(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\\):")
(defcustom mail-complete-alist
;; Don't use backquote here; we don't want backquote to get loaded
;; just because of loading this file.
;; Don't refer to mail-address-field-regexp here;
;; that confuses some things such as cus-dep.el.
(cons '("^\\(Resent-\\)?\\(To\\|From\\|CC\\|BCC\\|Reply-to\\):"
. (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.
The expression may reference the variable `pattern'
which will hold the string being completed.
If not on matching header, `mail-complete-function' gets called instead."
:type 'alist
:group 'mailalias)
(put 'mail-complete-alist 'risky-local-variable t)
;;;###autoload
(defcustom mail-complete-style 'angles
"*Specifies how \\[mail-complete] formats the full name when it completes.
If `nil', they contain just the return address like:
king@grassland.com
If `parens', they look like:
king@grassland.com (Elvis Parsley)
If `angles', they look like:
Elvis Parsley <king@grassland.com>"
:type '(choice (const angles) (const parens) (const nil))
:group 'mailalias)
(defcustom mail-complete-function 'ispell-complete-word
"*Function to call when completing outside `mail-complete-alist'-header."
:type '(choice function (const nil))
:group 'mailalias)
(defcustom mail-directory-function nil
"*Function to get completions from directory service or nil for none.
See `mail-directory-requery'."
:type '(choice function (const nil))
:group 'mailalias)
;; This is for when the directory is huge, or changes frequently.
(defcustom 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."
:type 'boolean
:group 'mailalias)
(defcustom mail-directory-process nil
"*Shell command to get the list of names from a mail directory.
This value is used when the value of `mail-directory-function'
is `mail-directory-process'. The value should be a list
of the form (COMMAND ARG ...), where each of the list elements
is evaluated. COMMAND should evaluate to a string. When
`mail-directory-requery' is non-nil, during evaluation of these
elements, the variable `pattern' contains the partial input being
completed. `pattern' is nil when `mail-directory-requery' is nil.
The value might look like this:
'(remote-shell-program \"HOST\" \"-nl\" \"USER\" \"COMMAND\")
or like this:
'(remote-shell-program \"HOST\" \"-n\" \"COMMAND '^\" pattern \"'\")"
:type 'sexp
:group 'mailalias)
(put 'mail-directory-process 'risky-local-variable t)
(defcustom mail-directory-stream nil
"*List of (HOST SERVICE) for stream connection to mail directory."
:type 'sexp
:group 'mailalias)
(put 'mail-directory-stream 'risky-local-variable t)
(defcustom 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"
:type '(choice (const nil) regexp function)
:group 'mailalias)
(put 'mail-directory-parser 'risky-local-variable t)
;; Internal variables.
(defvar mail-names t
"Alist of local users, aliases and directory entries as available.
Elements have the form (MAILNAME) or (MAILNAME . FULLNAME).
If the value means t, it means the real value should be calculated
for the next use. This is used in `mail-complete'.")
(defvar mail-local-names t
"Alist of local users.
When t this still needs to be initialized.")
;; Called from sendmail-send-it, or similar functions,
;; only if some mail aliases are defined.
;;;###autoload
(defun expand-mail-aliases (beg end &optional exclude)
"Expand all mail aliases in suitable header fields found between BEG and END.
If interactive, expand in header fields.
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."
(interactive
(save-excursion
(list (goto-char (point-min))
(mail-header-end))))
(sendmail-sync-aliases)
(when (eq mail-aliases t)
(setq mail-aliases nil)
(build-mail-aliases))
(save-excursion
(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 ((string (buffer-substring-no-properties pos epos))
translation)
(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)
(when 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)))
;; In case mail-aliases is t, make sure define-mail-alias
;; does not recursively call build-mail-aliases.
(setq mail-aliases nil)
(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)))
(goto-char (point-min))
;; Delete comments from the contents.
(while (search-forward "# " nil t)
(let ((p (- (point) 2)))
(end-of-line)
(delete-region p (point))))
;; 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\n]+\\)" nil t)
(let* ((name (match-string 2))
(start (progn (skip-chars-forward " \t") (point)))
value)
(end-of-line)
(setq value (buffer-substring-no-properties start (point)))
(unless (equal value "")
(define-mail-alias name value 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.
;; But not if we are doing that already right now.
(unless from-mailrc-file
(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))
convert-backslash
end tem)
(while start
(setq convert-backslash nil)
;; 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))
;; The following test on `found' compensates for a bug
;; in match-end, which does not return nil when match
;; failed.
(let ((found (string-match "[^\\]\\(\\([\\][\\]\\)*\\)\"[ \t,]*"
definition start)))
(setq start (1+ start)
end (and found (match-end 1))
convert-backslash t))
(setq end (string-match "[ \t,]+" definition start)))
(setq end (string-match "[ \t\n,]*,[ \t\n,]*" definition start)))
(let ((temp (substring definition start end))
(pos 0))
(setq start (and end
(/= (match-end 0) L)
(match-end 0)))
(if convert-backslash
(while (string-match "[\\]" temp pos)
(setq temp (replace-match "" t t temp))
(if start
(setq start (1- start)))
(setq pos (match-end 0))))
(setq result (cons temp result))))
(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 (< 0 (mail-header-end))
(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)
(let ((alist-elt (assoc completion mail-names)))
(if (cdr alist-elt)
(cond ((eq mail-complete-style 'parens)
(insert completion " (" (cdr alist-elt) ")"))
((eq mail-complete-style 'angles)
(insert (cdr alist-elt) " <" completion ">"))
(t
(insert completion)))
(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 addresses for completion.
Consults `/etc/passwd' and a directory service if one is set up via
`mail-directory-function'.
PATTERN is the string we want to complete."
(if (eq mail-local-names t)
(save-excursion
(set-buffer (generate-new-buffer " passwd"))
(let ((files mail-passwd-files))
(while files
(insert-file-contents (car files) nil nil nil t)
(setq files (cdr files))))
(if mail-passwd-command
(call-process shell-file-name nil t nil
shell-command-switch mail-passwd-command))
(goto-char (point-min))
(setq mail-local-names nil)
(while (not (eobp))
;;Recognize lines like
;; nobody:*:65534:65534::/:
;; +demo::::::/bin/csh
;; +ethanb
;;while skipping
;; +@SOFTWARE
;; The second \(...\) matches the user id.
(if (looking-at "\\+?\\([^:@\n+]+\\):[^:\n]*:\\([^\n:]*\\):")
(add-to-list 'mail-local-names
(cons (match-string 1)
(user-full-name
(string-to-number (match-string 2))))))
(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))))
(or mail-directory-requery
(setq mail-directory-names directory))
(if (or directory
(eq mail-names t))
(setq mail-names
(sort (append (if (consp mail-aliases)
(mapcar
(function (lambda (a) (list (car a))))
mail-aliases))
(if (consp mail-local-names)
mail-local-names)
(or directory
(when (consp mail-directory-names)
mail-directory-names)))
(lambda (a b)
;; should cache downcased strings
(string< (downcase (car a))
(downcase (car b)))))))))
mail-names)
(defun mail-directory (pattern)
"Use mail-directory facility to get user names matching PATTERN.
If PATTERN is nil, get all the defined user names.
This function calls `mail-directory-function' to query the directory,
then uses `mail-directory-parser' to parse the output it returns."
(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
(cons (match-string 1) directory)))
(if mail-directory-parser
(setq directory (funcall mail-directory-parser))
(while (not (eobp))
(setq directory
(cons (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)
"Run a shell command to output names in directory.
See `mail-directory-process'."
(when (consp 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 y)
(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)
;;; arch-tag: 1d6a0f87-eb34-4d45-8816-60c1b952cf46
;;; mailalias.el ends here
Reference in New Issue View Git Blame Copy Permalink