1 ;;; nnir.el --- search mail with various search engines -*- coding: iso-8859-1 -*-
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
4 ;; 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 ;; Author: Kai Großjohann <grossjohann@ls6.cs.uni-dortmund.de>
7 ;; Swish-e and Swish++ backends by:
8 ;; Christoph Conrad <christoph.conrad@gmx.de>.
9 ;; IMAP backend by: Simon Josefsson <jas@pdc.kth.se>.
10 ;; IMAP search by: Torsten Hilbrich <torsten.hilbrich <at> gmx.net>
11 ;; IMAP search improved by Daniel Pittman <daniel@rimspace.net>.
12 ;; nnmaildir support for Swish++ and Namazu backends by:
13 ;; Justus Piater <Justus <at> Piater.name>
14 ;; Keywords: news mail searching ir
16 ;; This file is part of GNU Emacs.
18 ;; GNU Emacs is free software: you can redistribute it and/or modify
19 ;; it under the terms of the GNU General Public License as published by
20 ;; the Free Software Foundation, either version 3 of the License, or
21 ;; (at your option) any later version.
23 ;; GNU Emacs is distributed in the hope that it will be useful,
24 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
25 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 ;; GNU General Public License for more details.
28 ;; You should have received a copy of the GNU General Public License
29 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
33 ;; TODO: Documentation in the Gnus manual
35 ;; Where in the existing gnus manual would this fit best?
37 ;; What does it do? Well, it allows you to search your mail using
38 ;; some search engine (imap, namazu, swish-e, gmane and others -- see
39 ;; later) by typing `G G' in the Group buffer. You will then get a
40 ;; buffer which shows all articles matching the query, sorted by
41 ;; Retrieval Status Value (score).
43 ;; When looking at the retrieval result (in the Summary buffer) you
44 ;; can type `A W' (aka M-x gnus-warp-to-article RET) on an article. You
45 ;; will be warped into the group this article came from. Typing `A T'
46 ;; (aka M-x gnus-summary-refer-thread RET) will warp to the group and
47 ;; also show the thread this article is part of.
49 ;; The Lisp setup may involve setting a few variables and setting up the
50 ;; search engine. You can define the variables in the server definition
52 ;; (setq gnus-secondary-select-methods '(
53 ;; (nnimap "" (nnimap-address "localhost")
54 ;; (nnir-search-engine namazu)
56 ;; The main variable to set is `nnir-search-engine'. Choose one of
57 ;; the engines listed in `nnir-engines'. (Actually `nnir-engines' is
58 ;; an alist, type `C-h v nnir-engines RET' for more information; this
59 ;; includes examples for setting `nnir-search-engine', too.)
61 ;; If you use one of the local indices (namazu, find-grep, swish) you
62 ;; must also set up a search engine backend.
66 ;; The Namazu backend requires you to have one directory containing all
67 ;; index files, this is controlled by the `nnir-namazu-index-directory'
68 ;; variable. To function the `nnir-namazu-remove-prefix' variable must
69 ;; also be correct, see the documentation for `nnir-namazu-remove-prefix'
72 ;; It is particularly important not to pass any any switches to namazu
73 ;; that will change the output format. Good switches to use include
74 ;; `--sort', `--ascending', `--early' and `--late'. Refer to the Namazu
75 ;; documentation for further information on valid switches.
77 ;; To index my mail with the `mknmz' program I use the following
78 ;; configuration file:
81 ;; | package conf; # Don't remove this line!
83 ;; | # Paths which will not be indexed. Don't use `^' or `$' anchors.
84 ;; | $EXCLUDE_PATH = "spam|sent";
86 ;; | # Header fields which should be searchable. case-insensitive
87 ;; | $REMAIN_HEADER = "from|date|message-id|subject";
89 ;; | # Searchable fields. case-insensitive
90 ;; | $SEARCH_FIELD = "from|date|message-id|subject";
92 ;; | # The max length of a word.
93 ;; | $WORD_LENG_MAX = 128;
95 ;; | # The max length of a field.
96 ;; | $MAX_FIELD_LENGTH = 256;
99 ;; My mail is stored in the directories ~/Mail/mail/, ~/Mail/lists/ and
100 ;; ~/Mail/archive/, so to index them I go to the directory set in
101 ;; `nnir-namazu-index-directory' and issue the following command.
103 ;; mknmz --mailnews ~/Mail/archive/ ~/Mail/mail/ ~/Mail/lists/
105 ;; For maximum searching efficiency I have a cron job set to run this
106 ;; command every four hours.
110 ;; The find-grep engine simply runs find(1) to locate eligible
111 ;; articles and searches them with grep(1). This, of course, is much
112 ;; slower than using a proper search engine but OTOH doesn't require
113 ;; maintenance of an index and is still faster than using any built-in
114 ;; means for searching. The method specification of the server to
115 ;; search must include a directory for this engine to work (E.g.,
116 ;; `nnml-directory'). The tools must be POSIX compliant. GNU Find
117 ;; prior to version 4.2.12 (4.2.26 on Linux due to incorrect ARG_MAX
118 ;; handling) does not work.
120 ;; | ;; find-grep configuration for searching the Gnus Cache
123 ;; | (nnml-get-new-mail nil)
124 ;; | (nnir-search-engine find-grep)
125 ;; | (nnml-directory "~/News/cache/")
126 ;; | (nnml-active-file "~/News/cache/active"))
129 ;; Developer information:
131 ;; I have tried to make the code expandable. Basically, it is divided
132 ;; into two layers. The upper layer is somewhat like the `nnvirtual'
133 ;; backend: given a specification of what articles to show from
134 ;; another backend, it creates a group containing exactly those
135 ;; articles. The lower layer issues a query to a search engine and
136 ;; produces such a specification of what articles to show from the
139 ;; The interface between the two layers consists of the single
140 ;; function `nnir-run-query', which just selects the appropriate
141 ;; function for the search engine one is using. The input to
142 ;; `nnir-run-query' is a string, representing the query as input by
143 ;; the user. The output of `nnir-run-query' is supposed to be a
144 ;; vector, each element of which should in turn be a three-element
145 ;; vector. The first element should be full group name of the article,
146 ;; the second element should be the article number, and the third
147 ;; element should be the Retrieval Status Value (RSV) as returned from
148 ;; the search engine. An RSV is the score assigned to the document by
149 ;; the search engine. For Boolean search engines, the
150 ;; RSV is always 1000 (or 1 or 100, or whatever you like).
152 ;; The sorting order of the articles in the summary buffer created by
153 ;; nnir is based on the order of the articles in the above mentioned
154 ;; vector, so that's where you can do the sorting you'd like. Maybe
155 ;; it would be nice to have a way of displaying the search result
156 ;; sorted differently?
158 ;; So what do you need to do when you want to add another search
159 ;; engine? You write a function that executes the query. Temporary
160 ;; data from the search engine can be put in `nnir-tmp-buffer'. This
161 ;; function should return the list of articles as a vector, as
162 ;; described above. Then, you need to register this backend in
163 ;; `nnir-engines'. Then, users can choose the backend by setting
164 ;; `nnir-search-engine' as a server variable.
168 ;; For Emacs <22.2 and XEmacs.
170 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
173 (require 'gnus-group)
182 (autoload 'nnimap-buffer "nnimap")
183 (autoload 'nnimap-command "nnimap")
184 (autoload 'nnimap-possibly-change-group "nnimap"))
187 (nnoo-define-basics nnir)
189 (gnus-declare-backend "nnir" 'mail)
192 ;;; User Customizable Variables:
195 "Search groups in Gnus with assorted seach engines."
198 (defcustom nnir-method-default-engines
201 "*Alist of default search engines keyed by server method."
205 (defcustom nnir-imap-default-search-key "Whole message"
206 "*The default IMAP search key for an nnir search. Must be one of
207 the keys in `nnir-imap-search-arguments'. To use raw imap queries
208 by default set this to \"Imap\"."
212 (defcustom nnir-swish++-configuration-file
213 (expand-file-name "~/Mail/swish++.conf")
214 "*Configuration file for swish++."
218 (defcustom nnir-swish++-program "search"
219 "*Name of swish++ search executable."
223 (defcustom nnir-swish++-additional-switches '()
224 "*A list of strings, to be given as additional arguments to swish++.
226 Note that this should be a list. Ie, do NOT use the following:
227 (setq nnir-swish++-additional-switches \"-i -w\") ; wrong
229 (setq nnir-swish++-additional-switches '(\"-i\" \"-w\"))"
230 :type '(repeat (string))
233 (defcustom nnir-swish++-remove-prefix (concat (getenv "HOME") "/Mail/")
234 "*The prefix to remove from each file name returned by swish++
235 in order to get a group name (albeit with / instead of .). This is a
238 This variable is very similar to `nnir-namazu-remove-prefix', except
239 that it is for swish++, not Namazu."
244 ;; URL: http://swish-e.org/
245 ;; Variables `nnir-swish-e-index-file', `nnir-swish-e-program' and
246 ;; `nnir-swish-e-additional-switches'
248 (make-obsolete-variable 'nnir-swish-e-index-file
249 'nnir-swish-e-index-files "Emacs 23.1")
250 (defcustom nnir-swish-e-index-file
251 (expand-file-name "~/Mail/index.swish-e")
252 "*Index file for swish-e.
253 This could be a server parameter.
254 It is never consulted once `nnir-swish-e-index-files', which should be
255 used instead, has been customized."
259 (defcustom nnir-swish-e-index-files
260 (list nnir-swish-e-index-file)
261 "*List of index files for swish-e.
262 This could be a server parameter."
263 :type '(repeat (file))
266 (defcustom nnir-swish-e-program "swish-e"
267 "*Name of swish-e search executable.
268 This cannot be a server parameter."
272 (defcustom nnir-swish-e-additional-switches '()
273 "*A list of strings, to be given as additional arguments to swish-e.
275 Note that this should be a list. Ie, do NOT use the following:
276 (setq nnir-swish-e-additional-switches \"-i -w\") ; wrong
278 (setq nnir-swish-e-additional-switches '(\"-i\" \"-w\"))
280 This could be a server parameter."
281 :type '(repeat (string))
284 (defcustom nnir-swish-e-remove-prefix (concat (getenv "HOME") "/Mail/")
285 "*The prefix to remove from each file name returned by swish-e
286 in order to get a group name (albeit with / instead of .). This is a
289 This variable is very similar to `nnir-namazu-remove-prefix', except
290 that it is for swish-e, not Namazu.
292 This could be a server parameter."
296 ;; HyREX engine, see <URL:http://ls6-www.cs.uni-dortmund.de/>
298 (defcustom nnir-hyrex-program "nnir-search"
299 "*Name of the nnir-search executable."
303 (defcustom nnir-hyrex-additional-switches '()
304 "*A list of strings, to be given as additional arguments for nnir-search.
305 Note that this should be a list. Ie, do NOT use the following:
306 (setq nnir-hyrex-additional-switches \"-ddl ddl.xml -c nnir\") ; wrong !
308 (setq nnir-hyrex-additional-switches '(\"-ddl\" \"ddl.xml\" \"-c\" \"nnir\"))"
309 :type '(repeat (string))
312 (defcustom nnir-hyrex-index-directory (getenv "HOME")
313 "*Index directory for HyREX."
317 (defcustom nnir-hyrex-remove-prefix (concat (getenv "HOME") "/Mail/")
318 "*The prefix to remove from each file name returned by HyREX
319 in order to get a group name (albeit with / instead of .).
321 For example, suppose that HyREX returns file names such as
322 \"/home/john/Mail/mail/misc/42\". For this example, use the following
323 setting: (setq nnir-hyrex-remove-prefix \"/home/john/Mail/\")
324 Note the trailing slash. Removing this prefix gives \"mail/misc/42\".
325 `nnir' knows to remove the \"/42\" and to replace \"/\" with \".\" to
326 arrive at the correct group name, \"mail.misc\"."
330 ;; Namazu engine, see <URL:http://www.namazu.org/>
332 (defcustom nnir-namazu-program "namazu"
333 "*Name of Namazu search executable."
337 (defcustom nnir-namazu-index-directory (expand-file-name "~/Mail/namazu/")
338 "*Index directory for Namazu."
342 (defcustom nnir-namazu-additional-switches '()
343 "*A list of strings, to be given as additional arguments to namazu.
344 The switches `-q', `-a', and `-s' are always used, very few other switches
345 make any sense in this context.
347 Note that this should be a list. Ie, do NOT use the following:
348 (setq nnir-namazu-additional-switches \"-i -w\") ; wrong
350 (setq nnir-namazu-additional-switches '(\"-i\" \"-w\"))"
351 :type '(repeat (string))
354 (defcustom nnir-namazu-remove-prefix (concat (getenv "HOME") "/Mail/")
355 "*The prefix to remove from each file name returned by Namazu
356 in order to get a group name (albeit with / instead of .).
358 For example, suppose that Namazu returns file names such as
359 \"/home/john/Mail/mail/misc/42\". For this example, use the following
360 setting: (setq nnir-namazu-remove-prefix \"/home/john/Mail/\")
361 Note the trailing slash. Removing this prefix gives \"mail/misc/42\".
362 `nnir' knows to remove the \"/42\" and to replace \"/\" with \".\" to
363 arrive at the correct group name, \"mail.misc\"."
369 (defvar nnir-imap-search-arguments
370 '(("Whole message" . "TEXT")
371 ("Subject" . "SUBJECT")
375 "Mapping from user readable keys to IMAP search items for use in nnir")
377 (defvar nnir-imap-search-other "HEADER %S"
378 "The IMAP search item to use for anything other than
379 `nnir-imap-search-arguments'. By default this is the name of an
382 (defvar nnir-imap-search-argument-history ()
383 "The history for querying search options in nnir")
385 ;;; Developer Extension Variable:
388 `((imap nnir-run-imap
390 "Imap Search in" ; Prompt
391 ,(mapcar 'car nnir-imap-search-arguments) ; alist for completing
392 nil ; allow any user input
394 nnir-imap-search-argument-history ; the history to use
395 ,nnir-imap-default-search-key ; default
397 (gmane nnir-run-gmane
398 ((author . "Gmane Author: ")))
399 (swish++ nnir-run-swish++
400 ((group . "Swish++ Group spec: ")))
401 (swish-e nnir-run-swish-e
402 ((group . "Swish-e Group spec: ")))
403 (namazu nnir-run-namazu
405 (hyrex nnir-run-hyrex
406 ((group . "Hyrex Group spec: ")))
407 (find-grep nnir-run-find-grep
408 ((grep-options . "Grep options: "))))
409 "Alist of supported search engines.
410 Each element in the alist is a three-element list (ENGINE FUNCTION ARGS).
411 ENGINE is a symbol designating the searching engine. FUNCTION is also
412 a symbol, giving the function that does the search. The third element
413 ARGS is a list of cons pairs (PARAM . PROMPT). When issuing a query,
414 the FUNCTION will issue a query for each of the PARAMs, using PROMPT.
416 The value of `nnir-search-engine' must be one of the ENGINE symbols.
417 For example, for searching a server using namazu include
418 (nnir-search-engine namazu)
419 in the server definition. Note that you have to set additional
420 variables for most backends. For example, the `namazu' backend
421 needs the variables `nnir-namazu-program',
422 `nnir-namazu-index-directory' and `nnir-namazu-remove-prefix'.
424 Add an entry here when adding a new search engine.")
426 (defvar nnir-retrieve-headers-override-function nil
427 "If non-nil, a function that accepts an article list and group
428 and populates the `nntp-server-buffer' with the retrieved
429 headers. Must return either 'nov or 'headers indicating the
430 retrieved header format.
432 If this variable is nil, or if the provided function returns nil for a search
433 result, `gnus-retrieve-headers' will be called instead.")
435 ;;; Internal Variables:
437 (defvar nnir-current-query nil
438 "Internal: stores current query (= group name).")
440 (defvar nnir-current-server nil
441 "Internal: stores current server (does it ever change?).")
443 (defvar nnir-current-group-marked nil
444 "Internal: stores current list of process-marked groups.")
446 (defvar nnir-artlist nil
447 "Internal: stores search result.")
449 (defvar nnir-tmp-buffer " *nnir*"
450 "Internal: temporary buffer.")
452 (defvar nnir-search-history ()
453 "Internal: the history for querying search options in nnir")
455 (defvar nnir-extra-parms nil
456 "Internal: stores request for extra search parms")
462 (defmacro nnir-article-group (article)
463 "Returns the group for ARTICLE"
464 `(nnir-artitem-group (nnir-artlist-article nnir-artlist ,article)))
466 (defmacro nnir-article-number (article)
467 "Returns the number for ARTICLE"
468 `(nnir-artitem-number (nnir-artlist-article nnir-artlist ,article)))
470 (defmacro nnir-article-rsv (article)
471 "Returns the rsv for ARTICLE"
472 `(nnir-artitem-rsv (nnir-artlist-article nnir-artlist ,article)))
474 (defmacro nnir-article-ids (article)
475 "Returns the pair `(nnir id . real id)' of ARTICLE"
476 `(cons ,article (nnir-article-number ,article)))
478 (defmacro nnir-categorize (sequence keyfunc &optional valuefunc)
479 "Sorts a sequence into categories and returns a list of the form
480 `((key1 (element11 element12)) (key2 (element21 element22))'.
481 The category key for a member of the sequence is obtained
482 as `(keyfunc member)' and the corresponding element is just
483 `member'. If `valuefunc' is non-nil, the element of the list
484 is `(valuefunc member)'."
485 `(if (null ,sequence)
490 (let ((y (,keyfunc member))
495 (push x (cadr (assoc y value)))
496 (push (list y (list x)) value))))
502 (defun gnus-group-make-nnir-group (nnir-extra-parms)
503 "Create an nnir group. Asks for query."
505 (setq nnir-current-query nil
506 nnir-current-server nil
507 nnir-current-group-marked nil
509 (let* ((query (read-string "Query: " nil 'nnir-search-history))
510 (parms (list (cons 'query query)))
511 (srv (if (gnus-server-server-name)
513 (add-to-list 'parms (cons 'unique-id (message-unique-id)) t)
514 (gnus-group-read-ephemeral-group
515 (concat "nnir:" (prin1-to-string parms)) (list 'nnir srv) t
516 (cons (current-buffer) gnus-current-window-configuration)
520 ;; Gnus backend interface functions.
522 (deffoo nnir-open-server (server &optional definitions)
523 ;; Just set the server variables appropriately.
524 (nnoo-change-server 'nnir server definitions))
526 (deffoo nnir-request-group (group &optional server fast info)
527 "GROUP is the query string."
528 (nnir-possibly-change-server server)
529 ;; Check for cache and return that if appropriate.
530 (if (and (equal group nnir-current-query)
531 (equal gnus-group-marked nnir-current-group-marked)
533 (equal server nnir-current-server)))
536 (setq nnir-artlist (nnir-run-query group server)))
537 (with-current-buffer nntp-server-buffer
538 (setq nnir-current-query group)
539 (when server (setq nnir-current-server server))
540 (setq nnir-current-group-marked gnus-group-marked)
541 (if (zerop (length nnir-artlist))
542 (nnheader-report 'nnir "Search produced empty results.")
543 ;; Remember data for cache.
544 (nnheader-insert "211 %d %d %d %s\n"
545 (nnir-artlist-length nnir-artlist) ; total #
547 (nnir-artlist-length nnir-artlist) ; last #
548 group)))) ; group name
550 (deffoo nnir-retrieve-headers (articles &optional group server fetch-old)
551 (with-current-buffer nntp-server-buffer
552 (let ((gnus-inhibit-demon t)
553 (articles-by-group (nnir-categorize
554 articles nnir-article-group nnir-article-ids))
556 (while (not (null articles-by-group))
557 (let* ((group-articles (pop articles-by-group))
558 (artgroup (car group-articles))
559 (articleids (cadr group-articles))
560 (artlist (sort (mapcar 'cdr articleids) '<))
561 (server (gnus-group-server artgroup))
562 (gnus-override-method (gnus-server-to-method server))
567 ;; "nnir-retrieve-headers doesn't grok message ids: %s"
569 (nnir-possibly-change-server server)
572 (case (setq gnus-headers-retrieved-by
575 nnir-retrieve-headers-override-function
576 (funcall nnir-retrieve-headers-override-function
578 (gnus-retrieve-headers artlist artgroup nil)))
580 (setq parsefunc 'nnheader-parse-nov))
582 (setq parsefunc 'nnheader-parse-head))
583 (t (error "Unknown header type %s while requesting articles \
584 of group %s" gnus-headers-retrieved-by artgroup)))
585 (goto-char (point-min))
587 (let* ((novitem (funcall parsefunc))
588 (artno (mail-header-number novitem))
589 (art (car (rassoc artno articleids))))
591 (mail-header-set-number novitem art)
592 (mail-header-set-subject
594 (format "[%d: %s/%d] %s"
595 (nnir-article-rsv art) artgroup artno
596 (mail-header-subject novitem)))
597 (push novitem headers))
602 (< (mail-header-number x) (mail-header-number y)))))
604 (mapc 'nnheader-insert-nov headers)
607 (deffoo nnir-request-article (article &optional group server to-buffer)
608 (if (stringp article)
611 "nnir-retrieve-headers doesn't grok message ids: %s"
614 (let ((artfullgroup (nnir-article-group article))
615 (artno (nnir-article-number article))
617 ;; Why must we bind nntp-server-buffer here? It won't
618 ;; work if `buf' is used, say. (Of course, the set-buffer
619 ;; line below must then be updated, too.)
620 (nntp-server-buffer (or to-buffer nntp-server-buffer)))
621 (set-buffer nntp-server-buffer)
623 (message "Requesting article %d from group %s"
625 (gnus-request-article artno artfullgroup nntp-server-buffer)
626 (cons artfullgroup artno)))))
628 (deffoo nnir-request-move-article (article group server accept-form
629 &optional last internal-move-group)
630 (let* ((artfullgroup (nnir-article-group article))
631 (artno (nnir-article-number article))
632 (to-newsgroup (nth 1 accept-form))
633 (to-method (gnus-find-method-for-group to-newsgroup))
634 (from-method (gnus-find-method-for-group artfullgroup))
635 (move-is-internal (gnus-server-equal from-method to-method))
636 (artsubject (mail-header-subject
638 (assoc article (gnus-data-list nil))))))
639 (setq gnus-newsgroup-original-name artfullgroup)
640 (string-match "^\\[[0-9]+:.+/[0-9]+\\] " artsubject)
641 (setq gnus-article-original-subject (substring artsubject (match-end 0)))
642 (gnus-request-move-article
648 (and move-is-internal
649 to-newsgroup ; Not respooling
650 (gnus-group-real-name to-newsgroup)))))
652 (deffoo nnir-warp-to-article ()
653 (let* ((cur (if (> (gnus-summary-article-number) 0)
654 (gnus-summary-article-number)
655 (error "This is not a real article.")))
656 (gnus-newsgroup-name (nnir-article-group cur))
657 (backend-number (nnir-article-number cur)))
658 (gnus-summary-read-group-1 gnus-newsgroup-name t t gnus-summary-buffer
659 nil (list backend-number))))
661 (nnoo-define-skeleton nnir)
664 (defmacro nnir-add-result (dirnam artno score prefix server artlist)
665 "Ask `nnir-compose-result' to construct a result vector,
666 and if it is non-nil, add it to artlist."
667 `(let ((result (nnir-compose-result ,dirnam ,artno ,score ,prefix ,server)))
668 (when (not (null result))
669 (push result ,artlist))))
671 (autoload 'nnmaildir-base-name-to-article-number "nnmaildir")
673 ;; Helper function currently used by the Swish++ and Namazu backends;
674 ;; perhaps useful for other backends as well
675 (defun nnir-compose-result (dirnam article score prefix server)
676 "Extract the group from dirnam, and create a result vector
677 ready to be added to the list of search results."
679 ;; remove nnir-*-remove-prefix from beginning of dirnam filename
680 (when (string-match (concat "^" prefix) dirnam)
681 (setq dirnam (replace-match "" t t dirnam)))
683 (when (file-readable-p (concat prefix dirnam article))
684 ;; remove trailing slash and, for nnmaildir, cur/new/tmp
687 (if (string= (gnus-group-server server) "nnmaildir")
690 ;; Set group to dirnam without any leading dots or slashes,
691 ;; and with all subsequent slashes replaced by dots
692 (let ((group (gnus-replace-in-string
693 (gnus-replace-in-string dirnam "^[./\\]" "" t)
696 (vector (gnus-group-full-name group server)
697 (if (string= (gnus-group-server server) "nnmaildir")
698 (nnmaildir-base-name-to-article-number
699 (substring article 0 (string-match ":" article))
701 (string-to-number article))
702 (string-to-number score)))))
704 ;;; Search Engine Interfaces:
707 (defun nnir-run-imap (query srv &optional groups)
708 "Run a search against an IMAP back-end server.
709 This uses a custom query language parser; see `nnir-imap-make-query' for
710 details on the language and supported extensions"
712 (let ((qstring (cdr (assq 'query query)))
713 (server (cadr (gnus-server-to-method srv)))
714 (defs (caddr (gnus-server-to-method srv)))
715 (criteria (or (cdr (assq 'criteria query))
716 (cdr (assoc nnir-imap-default-search-key
717 nnir-imap-search-arguments))))
718 (gnus-inhibit-demon t)
719 (groups (or groups (nnir-get-active srv))))
720 (message "Opening server %s" server)
727 (when (nnimap-possibly-change-group
728 (gnus-group-short-name group) server)
729 (with-current-buffer (nnimap-buffer)
730 (message "Searching %s..." group)
732 (result (nnimap-command "UID SEARCH %s"
733 (if (string= criteria "")
735 (nnir-imap-make-query
736 criteria qstring)))))
738 (lambda (artnum) (push (vector group artnum 1) artlist)
739 (setq arts (1+ arts)))
741 (delete 0 (mapcar #'string-to-number
744 (message "Searching %s... %d matches" group arts)))
745 (message "Searching %s...done" group))
750 (defun nnir-imap-make-query (criteria qstring)
751 "Parse the query string and criteria into an appropriate IMAP search
752 expression, returning the string query to make.
754 This implements a little language designed to return the expected results
755 to an arbitrary query string to the end user.
757 The search is always case-insensitive, as defined by RFC2060, and supports
758 the following features (inspired by the Google search input language):
760 Automatic \"and\" queries
761 If you specify multiple words then they will be treated as an \"and\"
762 expression intended to match all components.
765 If you wrap your query in double-quotes then it will be treated as a
769 If you precede a term with \"-\" then it will negate that.
772 If you include an upper-case \"OR\" in your search it will cause the
773 term before it and the term after it to be treated as alternatives.
775 In future the following will be added to the language:
776 * support for date matches
777 * support for location of text matching within the query
778 * from/to/etc headers
779 * additional search terms
780 * flag based searching
781 * anything else that the RFC supports, basically."
782 ;; Walk through the query and turn it into an IMAP query string.
783 (nnir-imap-query-to-imap criteria (nnir-imap-parse-query qstring)))
786 (defun nnir-imap-query-to-imap (criteria query)
787 "Turn a s-expression format query into IMAP."
789 ;; Turn the expressions into IMAP text
791 (nnir-imap-expr-to-imap criteria item))
792 ;; The query, already in s-expr format.
794 ;; Append a space between each expression
798 (defun nnir-imap-expr-to-imap (criteria expr)
799 "Convert EXPR into an IMAP search expression on CRITERIA"
800 ;; What sort of expression is this, eh?
802 ;; Simple string term
804 (format "%s %S" criteria expr))
807 ;; Composite term: or expression
808 ((eq (car-safe expr) 'or)
810 (nnir-imap-expr-to-imap criteria (second expr))
811 (nnir-imap-expr-to-imap criteria (third expr))))
812 ;; Composite term: just the fax, mam
813 ((eq (car-safe expr) 'not)
814 (format "NOT (%s)" (nnir-imap-query-to-imap criteria (rest expr))))
815 ;; Composite term: just expand it all.
816 ((and (not (null expr)) (listp expr))
817 (format "(%s)" (nnir-imap-query-to-imap criteria expr)))
818 ;; Complex value, give up for now.
819 (t (error "Unhandled input: %S" expr))))
822 (defun nnir-imap-parse-query (string)
823 "Turn STRING into an s-expression based query based on the IMAP
824 query language as defined in `nnir-imap-make-query'.
826 This involves turning individual tokens into higher level terms
827 that the search language can then understand and use."
829 ;; Set up the parsing environment.
831 (goto-char (point-min))
832 ;; Now, collect the output terms and return them.
834 (while (not (nnir-imap-end-of-input))
835 (push (nnir-imap-next-expr) out))
839 (defun nnir-imap-next-expr (&optional count)
840 "Return the next expression from the current buffer."
841 (let ((term (nnir-imap-next-term count))
842 (next (nnir-imap-peek-symbol)))
843 ;; Are we looking at an 'or' expression?
845 ;; Handle 'expr or expr'
847 (list 'or term (nnir-imap-next-expr 2)))
852 (defun nnir-imap-next-term (&optional count)
853 "Return the next TERM from the current buffer."
854 (let ((term (nnir-imap-next-symbol count)))
855 ;; What sort of term is this?
857 ;; and -- just ignore it
858 ((eq term 'and) 'and)
860 ((eq term 'not) (list 'not (nnir-imap-next-expr)))
865 (defun nnir-imap-peek-symbol ()
866 "Return the next symbol from the current buffer, but don't consume it."
868 (nnir-imap-next-symbol)))
870 (defun nnir-imap-next-symbol (&optional count)
871 "Return the next symbol from the current buffer, or nil if we are
872 at the end of the buffer. If supplied COUNT skips some symbols before
873 returning the one at the supplied position."
874 (when (and (numberp count) (> count 1))
875 (nnir-imap-next-symbol (1- count)))
876 (let ((case-fold-search t))
877 ;; end of input stream?
878 (unless (nnir-imap-end-of-input)
879 ;; No, return the next symbol from the stream.
881 ;; negated expression -- return it and advance one char.
882 ((looking-at "-") (forward-char 1) 'not)
884 ((looking-at "\"") (nnir-imap-delimited-string "\""))
885 ;; list expression -- we parse the content and return this as a list.
887 (nnir-imap-parse-query (nnir-imap-delimited-string ")")))
888 ;; keyword input -- return a symbol version
889 ((looking-at "\\band\\b") (forward-char 3) 'and)
890 ((looking-at "\\bor\\b") (forward-char 2) 'or)
891 ((looking-at "\\bnot\\b") (forward-char 3) 'not)
892 ;; Simple, boring keyword
893 (t (let ((start (point))
894 (end (if (search-forward-regexp "[[:blank:]]" nil t)
897 ;; unskip if we hit a non-blank terminal character.
898 (when (string-match "[^[:blank:]]" (match-string 0))
900 (goto-char (point-max)))))
901 (buffer-substring start end)))))))
903 (defun nnir-imap-delimited-string (delimiter)
904 "Return a delimited string from the current buffer."
905 (let ((start (point)) end)
906 (forward-char 1) ; skip the first delimiter.
908 (unless (search-forward delimiter nil t)
909 (error "Unmatched delimited input with %s in query" delimiter))
910 (let ((here (point)))
911 (unless (equal (buffer-substring (- here 2) (- here 1)) "\\")
912 (setq end (point)))))
913 (buffer-substring (1+ start) (1- end))))
915 (defun nnir-imap-end-of-input ()
916 "Are we at the end of input?"
917 (skip-chars-forward "[[:blank:]]")
921 ;; Swish++ interface.
930 (defun nnir-run-swish++ (query server &optional group)
931 "Run QUERY against swish++.
932 Returns a vector of (group name, file name) pairs (also vectors,
935 Tested with swish++ 4.7 on GNU/Linux and with swish++ 5.0b2 on
939 ;; (error "The swish++ backend cannot search specific groups"))
942 (let ( (qstring (cdr (assq 'query query)))
943 (groupspec (cdr (assq 'group query)))
944 (prefix (nnir-read-server-parm 'nnir-swish++-remove-prefix server))
946 ;; nnml-use-compressed-files might be any string, but probably this
947 ;; is sufficient. Note that we can't only use the value of
948 ;; nnml-use-compressed-files because old articles might have been
949 ;; saved with a different value.
950 (article-pattern (if (string= (gnus-group-server server) "nnmaildir")
952 "^[0-9]+\\(\\.[a-z0-9]+\\)?$"))
953 score artno dirnam filenam)
955 (when (equal "" qstring)
956 (error "swish++: You didn't enter anything"))
958 (set-buffer (get-buffer-create nnir-tmp-buffer))
962 (message "Doing swish++ query %s on %s..." qstring groupspec)
963 (message "Doing swish++ query %s..." qstring))
965 (let* ((cp-list `( ,nnir-swish++-program
966 nil ; input from /dev/null
968 nil ; don't redisplay
969 "--config-file" ,(nnir-read-server-parm 'nnir-swish++-configuration-file server)
970 ,@(nnir-read-server-parm 'nnir-swish++-additional-switches server)
971 ,qstring ; the query, in swish++ format
975 (message "%s args: %s" nnir-swish++-program
976 (mapconcat 'identity (cddddr cp-list) " ")) ;; ???
977 (apply 'call-process cp-list))))
978 (unless (or (null exitstatus)
980 (nnheader-report 'nnir "Couldn't run swish++: %s" exitstatus)
981 ;; swish++ failure reason is in this buffer, show it if
982 ;; the user wants it.
983 (when (> gnus-verbose 6)
984 (display-buffer nnir-tmp-buffer))))
986 ;; The results are output in the format of:
988 ;; rank relative-path-name file-size file-title
990 ;; rank relative-path-name file-size topic??
991 ;; where rank is an integer from 1 to 100.
992 (goto-char (point-min))
993 (while (re-search-forward
994 "\\(^[0-9]+\\) \\([^ ]+\\) [0-9]+ \\(.*\\)$" nil t)
995 (setq score (match-string 1)
996 filenam (match-string 2)
997 artno (file-name-nondirectory filenam)
998 dirnam (file-name-directory filenam))
1000 ;; don't match directories
1001 (when (string-match article-pattern artno)
1002 (when (not (null dirnam))
1004 ;; maybe limit results to matching groups.
1005 (when (or (not groupspec)
1006 (string-match groupspec dirnam))
1007 (nnir-add-result dirnam artno score prefix server artlist)))))
1009 (message "Massaging swish++ output...done")
1014 (function (lambda (x y)
1015 (> (nnir-artitem-rsv x)
1016 (nnir-artitem-rsv y)))))))))
1018 ;; Swish-E interface.
1019 (defun nnir-run-swish-e (query server &optional group)
1020 "Run given query against swish-e.
1021 Returns a vector of (group name, file name) pairs (also vectors,
1024 Tested with swish-e-2.0.1 on Windows NT 4.0."
1026 ;; swish-e crashes with empty parameter to "-w" on commandline...
1028 ;; (error "The swish-e backend cannot search specific groups"))
1031 (let ((qstring (cdr (assq 'query query)))
1033 (or (nnir-read-server-parm 'nnir-swish-e-remove-prefix server)
1034 (error "Missing parameter `nnir-swish-e-remove-prefix'")))
1035 artlist score artno dirnam group )
1037 (when (equal "" qstring)
1038 (error "swish-e: You didn't enter anything"))
1040 (set-buffer (get-buffer-create nnir-tmp-buffer))
1043 (message "Doing swish-e query %s..." query)
1045 (or (nnir-read-server-parm
1046 'nnir-swish-e-index-files server)
1047 (error "Missing parameter `nnir-swish-e-index-files'")))
1048 (additional-switches
1049 (nnir-read-server-parm
1050 'nnir-swish-e-additional-switches server))
1051 (cp-list `(,nnir-swish-e-program
1052 nil ; input from /dev/null
1054 nil ; don't redisplay
1056 ,@additional-switches
1058 ,qstring ; the query, in swish-e format
1062 (message "%s args: %s" nnir-swish-e-program
1063 (mapconcat 'identity (cddddr cp-list) " "))
1064 (apply 'call-process cp-list))))
1065 (unless (or (null exitstatus)
1067 (nnheader-report 'nnir "Couldn't run swish-e: %s" exitstatus)
1068 ;; swish-e failure reason is in this buffer, show it if
1069 ;; the user wants it.
1070 (when (> gnus-verbose 6)
1071 (display-buffer nnir-tmp-buffer))))
1073 ;; The results are output in the format of:
1074 ;; rank path-name file-title file-size
1075 (goto-char (point-min))
1076 (while (re-search-forward
1077 "\\(^[0-9]+\\) \\([^ ]+\\) \"\\([^\"]+\\)\" [0-9]+$" nil t)
1078 (setq score (match-string 1)
1079 artno (match-string 3)
1080 dirnam (file-name-directory (match-string 2)))
1082 ;; don't match directories
1083 (when (string-match "^[0-9]+$" artno)
1084 (when (not (null dirnam))
1086 ;; remove nnir-swish-e-remove-prefix from beginning of dirname
1087 (when (string-match (concat "^" prefix) dirnam)
1088 (setq dirnam (replace-match "" t t dirnam)))
1090 (setq dirnam (substring dirnam 0 -1))
1091 ;; eliminate all ".", "/", "\" from beginning. Always matches.
1092 (string-match "^[./\\]*\\(.*\\)$" dirnam)
1094 (setq group (gnus-replace-in-string (match-string 1 dirnam) "/" "."))
1095 ;; Windows "\\" -> "."
1096 (setq group (gnus-replace-in-string group "\\\\" "."))
1098 (push (vector (gnus-group-full-name group server)
1099 (string-to-number artno)
1100 (string-to-number score))
1103 (message "Massaging swish-e output...done")
1108 (function (lambda (x y)
1109 (> (nnir-artitem-rsv x)
1110 (nnir-artitem-rsv y)))))))))
1113 (defun nnir-run-hyrex (query server &optional group)
1116 (groupspec (cdr (assq 'group query)))
1117 (qstring (cdr (assq 'query query)))
1118 (prefix (nnir-read-server-parm 'nnir-hyrex-remove-prefix server))
1120 (when (and (not groupspec) group)
1123 (mapcar (lambda (x) (gnus-group-real-name x)) group))))
1124 (set-buffer (get-buffer-create nnir-tmp-buffer))
1126 (message "Doing hyrex-search query %s..." query)
1128 `( ,nnir-hyrex-program
1129 nil ; input from /dev/null
1131 nil ; don't redisplay
1132 "-i",(nnir-read-server-parm 'nnir-hyrex-index-directory server) ; index directory
1133 ,@(nnir-read-server-parm 'nnir-hyrex-additional-switches server)
1134 ,qstring ; the query, in hyrex-search format
1138 (message "%s args: %s" nnir-hyrex-program
1139 (mapconcat 'identity (cddddr cp-list) " "))
1140 (apply 'call-process cp-list))))
1141 (unless (or (null exitstatus)
1143 (nnheader-report 'nnir "Couldn't run hyrex-search: %s" exitstatus)
1144 ;; nnir-search failure reason is in this buffer, show it if
1145 ;; the user wants it.
1146 (when (> gnus-verbose 6)
1147 (display-buffer nnir-tmp-buffer)))) ;; FIXME: Dont clear buffer !
1148 (message "Doing hyrex-search query \"%s\"...done" qstring)
1150 ;; nnir-search returns:
1151 ;; for nnml/nnfolder: "filename mailid weigth"
1152 ;; for nnimap: "group mailid weigth"
1153 (goto-char (point-min))
1154 (delete-non-matching-lines "^\\S + [0-9]+ [0-9]+$")
1155 ;; HyREX doesn't search directly in groups -- so filter out here.
1157 (keep-lines groupspec))
1158 ;; extract data from result lines
1159 (goto-char (point-min))
1160 (while (re-search-forward
1161 "\\(\\S +\\) \\([0-9]+\\) \\([0-9]+\\)" nil t)
1162 (setq dirnam (match-string 1)
1163 artno (match-string 2)
1164 score (match-string 3))
1165 (when (string-match prefix dirnam)
1166 (setq dirnam (replace-match "" t t dirnam)))
1167 (push (vector (gnus-group-full-name
1168 (gnus-replace-in-string dirnam "/" ".") server)
1169 (string-to-number artno)
1170 (string-to-number score))
1172 (message "Massaging hyrex-search output...done.")
1175 (function (lambda (x y)
1176 (if (string-lessp (nnir-artitem-group x)
1177 (nnir-artitem-group y))
1179 (< (nnir-artitem-number x)
1180 (nnir-artitem-number y)))))))
1184 (defun nnir-run-namazu (query server &optional group)
1185 "Run given query against Namazu. Returns a vector of (group name, file name)
1186 pairs (also vectors, actually).
1188 Tested with Namazu 2.0.6 on a GNU/Linux system."
1190 ;; (error "The Namazu backend cannot search specific groups"))
1192 (let ((article-pattern (if (string= (gnus-group-server server) "nnmaildir")
1196 (qstring (cdr (assq 'query query)))
1197 (prefix (nnir-read-server-parm 'nnir-namazu-remove-prefix server))
1199 (process-environment (copy-sequence process-environment)))
1200 (setenv "LC_MESSAGES" "C")
1201 (set-buffer (get-buffer-create nnir-tmp-buffer))
1204 `( ,nnir-namazu-program
1205 nil ; input from /dev/null
1207 nil ; don't redisplay
1208 "-q" ; don't be verbose
1209 "-a" ; show all matches
1210 "-s" ; use short format
1211 ,@(nnir-read-server-parm 'nnir-namazu-additional-switches server)
1212 ,qstring ; the query, in namazu format
1213 ,(nnir-read-server-parm 'nnir-namazu-index-directory server) ; index directory
1217 (message "%s args: %s" nnir-namazu-program
1218 (mapconcat 'identity (cddddr cp-list) " "))
1219 (apply 'call-process cp-list))))
1220 (unless (or (null exitstatus)
1222 (nnheader-report 'nnir "Couldn't run namazu: %s" exitstatus)
1223 ;; Namazu failure reason is in this buffer, show it if
1224 ;; the user wants it.
1225 (when (> gnus-verbose 6)
1226 (display-buffer nnir-tmp-buffer))))
1228 ;; Namazu output looks something like this:
1229 ;; 2. Re: Gnus agent expire broken (score: 55)
1230 ;; /home/henrik/Mail/mail/sent/1310 (4,138 bytes)
1232 (goto-char (point-min))
1233 (while (re-search-forward
1234 "^\\([0-9]+\\.\\).*\\((score: \\([0-9]+\\)\\))\n\\([^ ]+\\)"
1236 (setq score (match-string 3)
1237 group (file-name-directory (match-string 4))
1238 article (file-name-nondirectory (match-string 4)))
1240 ;; make sure article and group is sane
1241 (when (and (string-match article-pattern article)
1243 (nnir-add-result group article score prefix server artlist)))
1245 ;; sort artlist by score
1248 (function (lambda (x y)
1249 (> (nnir-artitem-rsv x)
1250 (nnir-artitem-rsv y)))))))))
1252 (defun nnir-run-find-grep (query server &optional grouplist)
1253 "Run find and grep to obtain matching articles."
1254 (let* ((method (gnus-server-to-method server))
1256 (concat (symbol-name (car method)) "-directory")))
1257 (directory (cadr (assoc sym (cddr method))))
1258 (regexp (cdr (assoc 'query query)))
1259 (grep-options (cdr (assoc 'grep-options query)))
1262 (error "No directory found in method specification of server %s"
1268 (message "Searching %s using find-grep..."
1270 (save-window-excursion
1271 (set-buffer (get-buffer-create nnir-tmp-buffer))
1273 (if (> gnus-verbose 6)
1274 (pop-to-buffer (current-buffer)))
1275 (cd directory) ; Using relative paths simplifies
1280 ;; Try accessing the group literally as
1281 ;; well as interpreting dots as directory
1282 ;; separators so the engine works with
1283 ;; plain nnml as well as the Gnus Cache.
1284 (let ((group (gnus-group-real-name group)))
1285 ;; Replace cl-func find-if.
1286 (if (file-directory-p group)
1288 (if (file-directory-p
1290 (gnus-replace-in-string
1295 (error "Cannot locate directory for group"))
1298 'call-process "find" nil t
1299 "find" group "-type" "f" "-name" "[0-9]*" "-exec"
1301 `("-l" ,@(and grep-options
1302 (split-string grep-options "\\s-" t))
1303 "-e" ,regexp "{}" "+"))))
1305 ;; Translate relative paths to group names.
1307 (let* ((path (split-string
1310 (line-end-position)) "/" t))
1311 (art (string-to-number (car (last path)))))
1312 (while (string= "." (car path))
1313 (setq path (cdr path)))
1314 (let ((group (mapconcat 'identity
1316 ;; (subseq path 0 -1)
1317 (let ((end (1- (length path)))
1320 (>= (setq end (1- end)) 0)
1321 (push (pop path) res))
1325 (vector (gnus-group-full-name group server) art 0)
1328 (message "Searching %s using find-grep...done"
1333 (declare-function mm-url-insert "mm-url" (url &optional follow-refresh))
1334 (declare-function mm-url-encode-www-form-urlencoded "mm-url" (pairs))
1337 (defun nnir-run-gmane (query srv &optional groups)
1338 "Run a search against a gmane back-end server."
1339 (if (gnus-string-match-p "gmane" srv)
1340 (let* ((case-fold-search t)
1341 (qstring (cdr (assq 'query query)))
1342 (server (cadr (gnus-server-to-method srv)))
1343 (groupspec (if groups
1346 (format "group:%s" (gnus-group-short-name x)))
1349 (if (assq 'author query)
1350 (format "author:%s" (cdr (assq 'author query))) ""))
1351 (search (format "%s %s %s"
1352 qstring groupspec authorspec))
1353 (gnus-inhibit-demon t)
1356 (with-current-buffer (get-buffer-create nnir-tmp-buffer)
1360 "http://search.gmane.org/nov.php"
1362 (mm-url-encode-www-form-urlencoded
1363 `(("query" . ,search)
1364 ("HITSPERPAGE" . "999")))))
1365 (unless (featurep 'xemacs) (set-buffer-multibyte t))
1366 (mm-decode-coding-region (point-min) (point-max) 'utf-8)
1367 (goto-char (point-min))
1370 (unless (or (eolp) (looking-at "\x0d"))
1371 (let ((header (nnheader-parse-nov)))
1372 (let ((xref (mail-header-xref header))
1373 (xscore (string-to-number (cdr (assoc 'X-Score
1374 (mail-header-extra header))))))
1375 (when (string-match " \\([^:]+\\)[:/]\\([0-9]+\\)" xref)
1378 (gnus-group-prefixed-name (match-string 1 xref) srv)
1379 (string-to-number (match-string 2 xref)) xscore)
1382 (apply 'vector (nreverse (delete-dups artlist))))
1383 (message "Can't search non-gmane nntp groups")
1388 (defun nnir-read-parms (query nnir-search-engine)
1389 "Reads additional search parameters according to `nnir-engines'."
1390 (let ((parmspec (caddr (assoc nnir-search-engine nnir-engines))))
1392 (mapcar 'nnir-read-parm parmspec))))
1394 (defun nnir-read-parm (parmspec)
1395 "Reads a single search parameter.
1396 `parmspec' is a cons cell, the car is a symbol, the cdr is a prompt."
1397 (let ((sym (car parmspec))
1398 (prompt (cdr parmspec)))
1400 (let* ((result (apply 'gnus-completing-read prompt))
1401 (mapping (or (assoc result nnir-imap-search-arguments)
1402 (cons nil nnir-imap-search-other))))
1403 (cons sym (format (cdr mapping) result)))
1404 (cons sym (read-string prompt)))))
1406 (autoload 'gnus-group-topic-name "gnus-topic")
1408 (defun nnir-run-query (query nserver)
1409 "Invoke appropriate search engine function (see `nnir-engines').
1410 If some groups were process-marked, run the query for each of the groups
1411 and concat the results."
1412 (let ((q (car (read-from-string query)))
1413 (groups (if (string= "all-ephemeral" nserver)
1414 (with-current-buffer gnus-server-buffer
1415 (list (list (gnus-server-server-name))))
1417 (or gnus-group-marked
1418 (if (gnus-group-group-name)
1419 (list (gnus-group-group-name))
1420 (cdr (assoc (gnus-group-topic-name)
1421 gnus-topic-alist))))
1422 gnus-group-server))))
1426 (let* ((server (car x))
1428 (or (nnir-read-server-parm 'nnir-search-engine
1431 (gnus-server-to-method server))
1432 nnir-method-default-engines))))
1434 (setq search-func (cadr (assoc nnir-search-engine
1437 (funcall search-func
1438 (if nnir-extra-parms
1439 (nnir-read-parms q nnir-search-engine)
1445 (defun nnir-read-server-parm (key server)
1446 "Returns the parameter value of key for the given server, where
1447 server is of form 'backend:name'."
1448 (let ((method (gnus-server-to-method server)))
1449 (cond ((and method (assq key (cddr method)))
1450 (nth 1 (assq key (cddr method))))
1453 (defun nnir-possibly-change-server (server)
1454 (unless (and server (nnir-server-opened server))
1455 (nnir-open-server server)))
1458 ;; Data type article list.
1460 (defun nnir-artlist-length (artlist)
1461 "Returns number of articles in artlist."
1464 (defun nnir-artlist-article (artlist n)
1465 "Returns from ARTLIST the Nth artitem (counting starting at 1)."
1466 (elt artlist (1- n)))
1468 (defun nnir-artitem-group (artitem)
1469 "Returns the group from the ARTITEM."
1472 (defun nnir-artitem-number (artitem)
1473 "Returns the number from the ARTITEM."
1476 (defun nnir-artitem-rsv (artitem)
1477 "Returns the Retrieval Status Value (RSV, score) from the ARTITEM."
1482 (defun nnir-artlist-groups (artlist)
1483 "Returns a list of all groups in the given ARTLIST."
1486 ;; from each artitem, extract group component
1487 (setq with-dups (mapcar 'nnir-artitem-group artlist))
1488 ;; remove duplicates from above
1489 (mapc (function (lambda (x) (add-to-list 'res x)))
1493 (defun nnir-get-active (srv)
1494 (let ((method (gnus-server-to-method srv))
1496 (gnus-request-list method)
1497 (with-current-buffer nntp-server-buffer
1498 (let ((cur (current-buffer))
1500 (goto-char (point-min))
1501 (unless (string= gnus-ignored-newsgroups "")
1502 (delete-matching-lines gnus-ignored-newsgroups))
1505 (push (mm-string-as-unibyte
1507 (skip-chars-forward "^ \t\\\\")
1508 (setq name (buffer-substring (+ p 1) (- (point) 1)))
1509 (gnus-group-full-name name method)))
1517 ;;; nnir.el ends here