1 ;;; nnir.el --- search mail with various search engines -*- coding: utf-8 -*-
3 ;; Copyright (C) 1998-2013 Free Software Foundation, Inc.
5 ;; Author: Kai Großjohann <grossjohann@ls6.cs.uni-dortmund.de>
6 ;; Swish-e and Swish++ backends by:
7 ;; Christoph Conrad <christoph.conrad@gmx.de>.
8 ;; IMAP backend by: Simon Josefsson <jas@pdc.kth.se>.
9 ;; IMAP search by: Torsten Hilbrich <torsten.hilbrich <at> gmx.net>
10 ;; IMAP search improved by Daniel Pittman <daniel@rimspace.net>.
11 ;; nnmaildir support for Swish++ and Namazu backends by:
12 ;; Justus Piater <Justus <at> Piater.name>
13 ;; Keywords: news mail searching ir
15 ;; This file is part of GNU Emacs.
17 ;; GNU Emacs is free software: you can redistribute it and/or modify
18 ;; it under the terms of the GNU General Public License as published by
19 ;; the Free Software Foundation, either version 3 of the License, or
20 ;; (at your option) any later version.
22 ;; GNU Emacs is distributed in the hope that it will be useful,
23 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
24 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 ;; GNU General Public License for more details.
27 ;; You should have received a copy of the GNU General Public License
28 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
32 ;; What does it do? Well, it allows you to search your mail using
33 ;; some search engine (imap, namazu, swish-e, gmane and others -- see
34 ;; later) by typing `G G' in the Group buffer. You will then get a
35 ;; buffer which shows all articles matching the query, sorted by
36 ;; Retrieval Status Value (score).
38 ;; When looking at the retrieval result (in the Summary buffer) you
39 ;; can type `A W' (aka M-x gnus-warp-to-article RET) on an article. You
40 ;; will be warped into the group this article came from. Typing `A T'
41 ;; (aka M-x gnus-summary-refer-thread RET) will warp to the group and
42 ;; also show the thread this article is part of.
44 ;; The Lisp setup may involve setting a few variables and setting up the
45 ;; search engine. You can define the variables in the server definition
47 ;; (setq gnus-secondary-select-methods '(
48 ;; (nnimap "" (nnimap-address "localhost")
49 ;; (nnir-search-engine namazu)
51 ;; The main variable to set is `nnir-search-engine'. Choose one of
52 ;; the engines listed in `nnir-engines'. (Actually `nnir-engines' is
53 ;; an alist, type `C-h v nnir-engines RET' for more information; this
54 ;; includes examples for setting `nnir-search-engine', too.)
56 ;; If you use one of the local indices (namazu, find-grep, swish) you
57 ;; must also set up a search engine backend.
61 ;; The Namazu backend requires you to have one directory containing all
62 ;; index files, this is controlled by the `nnir-namazu-index-directory'
63 ;; variable. To function the `nnir-namazu-remove-prefix' variable must
64 ;; also be correct, see the documentation for `nnir-namazu-remove-prefix'
67 ;; It is particularly important not to pass any any switches to namazu
68 ;; that will change the output format. Good switches to use include
69 ;; `--sort', `--ascending', `--early' and `--late'. Refer to the Namazu
70 ;; documentation for further information on valid switches.
72 ;; To index my mail with the `mknmz' program I use the following
73 ;; configuration file:
76 ;; | package conf; # Don't remove this line!
78 ;; | # Paths which will not be indexed. Don't use `^' or `$' anchors.
79 ;; | $EXCLUDE_PATH = "spam|sent";
81 ;; | # Header fields which should be searchable. case-insensitive
82 ;; | $REMAIN_HEADER = "from|date|message-id|subject";
84 ;; | # Searchable fields. case-insensitive
85 ;; | $SEARCH_FIELD = "from|date|message-id|subject";
87 ;; | # The max length of a word.
88 ;; | $WORD_LENG_MAX = 128;
90 ;; | # The max length of a field.
91 ;; | $MAX_FIELD_LENGTH = 256;
94 ;; My mail is stored in the directories ~/Mail/mail/, ~/Mail/lists/ and
95 ;; ~/Mail/archive/, so to index them I go to the directory set in
96 ;; `nnir-namazu-index-directory' and issue the following command.
98 ;; mknmz --mailnews ~/Mail/archive/ ~/Mail/mail/ ~/Mail/lists/
100 ;; For maximum searching efficiency I have a cron job set to run this
101 ;; command every four hours.
105 ;; The find-grep engine simply runs find(1) to locate eligible
106 ;; articles and searches them with grep(1). This, of course, is much
107 ;; slower than using a proper search engine but OTOH doesn't require
108 ;; maintenance of an index and is still faster than using any built-in
109 ;; means for searching. The method specification of the server to
110 ;; search must include a directory for this engine to work (E.g.,
111 ;; `nnml-directory'). The tools must be POSIX compliant. GNU Find
112 ;; prior to version 4.2.12 (4.2.26 on Linux due to incorrect ARG_MAX
113 ;; handling) does not work.
115 ;; | ;; find-grep configuration for searching the Gnus Cache
118 ;; | (nnml-get-new-mail nil)
119 ;; | (nnir-search-engine find-grep)
120 ;; | (nnml-directory "~/News/cache/")
121 ;; | (nnml-active-file "~/News/cache/active"))
124 ;; Developer information:
126 ;; I have tried to make the code expandable. Basically, it is divided
127 ;; into two layers. The upper layer is somewhat like the `nnvirtual'
128 ;; backend: given a specification of what articles to show from
129 ;; another backend, it creates a group containing exactly those
130 ;; articles. The lower layer issues a query to a search engine and
131 ;; produces such a specification of what articles to show from the
134 ;; The interface between the two layers consists of the single
135 ;; function `nnir-run-query', which dispatches the search to the
136 ;; proper search function. The argument of `nnir-run-query' is an
137 ;; alist with two keys: 'nnir-query-spec and 'nnir-group-spec. The
138 ;; value for 'nnir-query-spec is an alist. The only required key/value
139 ;; pair is (query . "query") specifying the search string to pass to
140 ;; the query engine. Individual engines may have other elements. The
141 ;; value of 'nnir-group-spec is a list with the specification of the
142 ;; groups/servers to search. The format of the 'nnir-group-spec is
143 ;; (("server1" ("group11" "group12")) ("server2" ("group21"
144 ;; "group22"))). If any of the group lists is absent then all groups
145 ;; on that server are searched.
147 ;; The output of `nnir-run-query' is supposed to be a vector, each
148 ;; element of which should in turn be a three-element vector. The
149 ;; first element should be full group name of the article, the second
150 ;; element should be the article number, and the third element should
151 ;; be the Retrieval Status Value (RSV) as returned from the search
152 ;; engine. An RSV is the score assigned to the document by the search
153 ;; engine. For Boolean search engines, the RSV is always 1000 (or 1
154 ;; or 100, or whatever you like).
156 ;; The sorting order of the articles in the summary buffer created by
157 ;; nnir is based on the order of the articles in the above mentioned
158 ;; vector, so that's where you can do the sorting you'd like. Maybe
159 ;; it would be nice to have a way of displaying the search result
160 ;; sorted differently?
162 ;; So what do you need to do when you want to add another search
163 ;; engine? You write a function that executes the query. Temporary
164 ;; data from the search engine can be put in `nnir-tmp-buffer'. This
165 ;; function should return the list of articles as a vector, as
166 ;; described above. Then, you need to register this backend in
167 ;; `nnir-engines'. Then, users can choose the backend by setting
168 ;; `nnir-search-engine' as a server variable.
174 ;; For Emacs <22.2 and XEmacs.
176 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
179 (require 'gnus-group)
185 ;;; Internal Variables:
187 (defvar nnir-memo-query nil
188 "Internal: stores current query.")
190 (defvar nnir-memo-server nil
191 "Internal: stores current server.")
193 (defvar nnir-artlist nil
194 "Internal: stores search result.")
196 (defvar nnir-search-history ()
197 "Internal: the history for querying search options in nnir")
199 (defconst nnir-tmp-buffer " *nnir*"
200 "Internal: temporary buffer.")
205 (defvar nnir-imap-search-arguments
206 '(("whole message" . "TEXT")
207 ("subject" . "SUBJECT")
212 "Mapping from user readable keys to IMAP search items for use in nnir")
214 (defvar nnir-imap-search-other "HEADER %S"
215 "The IMAP search item to use for anything other than
216 `nnir-imap-search-arguments'. By default this is the name of an
219 (defvar nnir-imap-search-argument-history ()
220 "The history for querying search options in nnir")
224 ;; Data type article list.
226 (defmacro nnir-artlist-length (artlist)
227 "Returns number of articles in artlist."
230 (defmacro nnir-artlist-article (artlist n)
231 "Returns from ARTLIST the Nth artitem (counting starting at 1)."
233 (elt ,artlist (1- ,n))))
235 (defmacro nnir-artitem-group (artitem)
236 "Returns the group from the ARTITEM."
239 (defmacro nnir-artitem-number (artitem)
240 "Returns the number from the ARTITEM."
243 (defmacro nnir-artitem-rsv (artitem)
244 "Returns the Retrieval Status Value (RSV, score) from the ARTITEM."
247 (defmacro nnir-article-group (article)
248 "Returns the group for ARTICLE"
249 `(nnir-artitem-group (nnir-artlist-article nnir-artlist ,article)))
251 (defmacro nnir-article-number (article)
252 "Returns the number for ARTICLE"
253 `(nnir-artitem-number (nnir-artlist-article nnir-artlist ,article)))
255 (defmacro nnir-article-rsv (article)
256 "Returns the rsv for ARTICLE"
257 `(nnir-artitem-rsv (nnir-artlist-article nnir-artlist ,article)))
259 (defsubst nnir-article-ids (article)
260 "Returns the pair `(nnir id . real id)' of ARTICLE"
261 (cons article (nnir-article-number article)))
263 (defmacro nnir-categorize (sequence keyfunc &optional valuefunc)
264 "Sorts a sequence into categories and returns a list of the form
265 `((key1 (element11 element12)) (key2 (element21 element22))'.
266 The category key for a member of the sequence is obtained
267 as `(keyfunc member)' and the corresponding element is just
268 `member'. If `valuefunc' is non-nil, the element of the list
269 is `(valuefunc member)'."
270 `(unless (null ,sequence)
274 (let ((y (,keyfunc member))
279 (push x (cadr (assoc y value)))
280 (push (list y (list x)) value))))
289 (autoload 'nnimap-buffer "nnimap")
290 (autoload 'nnimap-command "nnimap")
291 (autoload 'nnimap-change-group "nnimap")
292 (autoload 'nnimap-make-thread-query "nnimap")
293 (autoload 'gnus-registry-action "gnus-registry")
294 (autoload 'gnus-registry-get-id-key "gnus-registry")
295 (autoload 'gnus-group-topic-name "gnus-topic"))
299 (nnoo-define-basics nnir)
301 (gnus-declare-backend "nnir" 'mail 'virtual)
304 ;;; User Customizable Variables:
307 "Search groups in Gnus with assorted search engines."
310 (defcustom nnir-ignored-newsgroups ""
311 "*A regexp to match newsgroups in the active file that should
312 be skipped when searching."
317 (defcustom nnir-summary-line-format nil
318 "*The format specification of the lines in an nnir summary buffer.
320 All the items from `gnus-summary-line-format' are available, along
321 with three items unique to nnir summary buffers:
323 %Z Search retrieval score value (integer)
324 %G Article original full group name (string)
325 %g Article original short group name (string)
327 If nil this will use `gnus-summary-line-format'."
332 (defcustom nnir-retrieve-headers-override-function nil
333 "*If non-nil, a function that accepts an article list and group
334 and populates the `nntp-server-buffer' with the retrieved
335 headers. Must return either 'nov or 'headers indicating the
336 retrieved header format.
338 If this variable is nil, or if the provided function returns nil for a search
339 result, `gnus-retrieve-headers' will be called instead."
344 (defcustom nnir-imap-default-search-key "whole message"
345 "*The default IMAP search key for an nnir search. Must be one of
346 the keys in `nnir-imap-search-arguments'. To use raw imap queries
347 by default set this to \"imap\"."
349 :type `(choice ,@(mapcar (lambda (elem) (list 'const (car elem)))
350 nnir-imap-search-arguments))
353 (defcustom nnir-swish++-configuration-file
354 (expand-file-name "~/Mail/swish++.conf")
355 "*Configuration file for swish++."
359 (defcustom nnir-swish++-program "search"
360 "*Name of swish++ search executable."
364 (defcustom nnir-swish++-additional-switches '()
365 "*A list of strings, to be given as additional arguments to swish++.
367 Note that this should be a list. Ie, do NOT use the following:
368 (setq nnir-swish++-additional-switches \"-i -w\") ; wrong
370 (setq nnir-swish++-additional-switches '(\"-i\" \"-w\"))"
371 :type '(repeat (string))
374 (defcustom nnir-swish++-remove-prefix (concat (getenv "HOME") "/Mail/")
375 "*The prefix to remove from each file name returned by swish++
376 in order to get a group name (albeit with / instead of .). This is a
379 This variable is very similar to `nnir-namazu-remove-prefix', except
380 that it is for swish++, not Namazu."
385 ;; URL: http://swish-e.org/
386 ;; Variables `nnir-swish-e-index-file', `nnir-swish-e-program' and
387 ;; `nnir-swish-e-additional-switches'
389 (make-obsolete-variable 'nnir-swish-e-index-file
390 'nnir-swish-e-index-files "Emacs 23.1")
391 (defcustom nnir-swish-e-index-file
392 (expand-file-name "~/Mail/index.swish-e")
393 "*Index file for swish-e.
394 This could be a server parameter.
395 It is never consulted once `nnir-swish-e-index-files', which should be
396 used instead, has been customized."
400 (defcustom nnir-swish-e-index-files
401 (list nnir-swish-e-index-file)
402 "*List of index files for swish-e.
403 This could be a server parameter."
404 :type '(repeat (file))
407 (defcustom nnir-swish-e-program "swish-e"
408 "*Name of swish-e search executable.
409 This cannot be a server parameter."
413 (defcustom nnir-swish-e-additional-switches '()
414 "*A list of strings, to be given as additional arguments to swish-e.
416 Note that this should be a list. Ie, do NOT use the following:
417 (setq nnir-swish-e-additional-switches \"-i -w\") ; wrong
419 (setq nnir-swish-e-additional-switches '(\"-i\" \"-w\"))
421 This could be a server parameter."
422 :type '(repeat (string))
425 (defcustom nnir-swish-e-remove-prefix (concat (getenv "HOME") "/Mail/")
426 "*The prefix to remove from each file name returned by swish-e
427 in order to get a group name (albeit with / instead of .). This is a
430 This variable is very similar to `nnir-namazu-remove-prefix', except
431 that it is for swish-e, not Namazu.
433 This could be a server parameter."
437 ;; HyREX engine, see <URL:http://ls6-www.cs.uni-dortmund.de/>
439 (defcustom nnir-hyrex-program "nnir-search"
440 "*Name of the nnir-search executable."
444 (defcustom nnir-hyrex-additional-switches '()
445 "*A list of strings, to be given as additional arguments for nnir-search.
446 Note that this should be a list. Ie, do NOT use the following:
447 (setq nnir-hyrex-additional-switches \"-ddl ddl.xml -c nnir\") ; wrong !
449 (setq nnir-hyrex-additional-switches '(\"-ddl\" \"ddl.xml\" \"-c\" \"nnir\"))"
450 :type '(repeat (string))
453 (defcustom nnir-hyrex-index-directory (getenv "HOME")
454 "*Index directory for HyREX."
458 (defcustom nnir-hyrex-remove-prefix (concat (getenv "HOME") "/Mail/")
459 "*The prefix to remove from each file name returned by HyREX
460 in order to get a group name (albeit with / instead of .).
462 For example, suppose that HyREX returns file names such as
463 \"/home/john/Mail/mail/misc/42\". For this example, use the following
464 setting: (setq nnir-hyrex-remove-prefix \"/home/john/Mail/\")
465 Note the trailing slash. Removing this prefix gives \"mail/misc/42\".
466 `nnir' knows to remove the \"/42\" and to replace \"/\" with \".\" to
467 arrive at the correct group name, \"mail.misc\"."
471 ;; Namazu engine, see <URL:http://www.namazu.org/>
473 (defcustom nnir-namazu-program "namazu"
474 "*Name of Namazu search executable."
478 (defcustom nnir-namazu-index-directory (expand-file-name "~/Mail/namazu/")
479 "*Index directory for Namazu."
483 (defcustom nnir-namazu-additional-switches '()
484 "*A list of strings, to be given as additional arguments to namazu.
485 The switches `-q', `-a', and `-s' are always used, very few other switches
486 make any sense in this context.
488 Note that this should be a list. Ie, do NOT use the following:
489 (setq nnir-namazu-additional-switches \"-i -w\") ; wrong
491 (setq nnir-namazu-additional-switches '(\"-i\" \"-w\"))"
492 :type '(repeat (string))
495 (defcustom nnir-namazu-remove-prefix (concat (getenv "HOME") "/Mail/")
496 "*The prefix to remove from each file name returned by Namazu
497 in order to get a group name (albeit with / instead of .).
499 For example, suppose that Namazu returns file names such as
500 \"/home/john/Mail/mail/misc/42\". For this example, use the following
501 setting: (setq nnir-namazu-remove-prefix \"/home/john/Mail/\")
502 Note the trailing slash. Removing this prefix gives \"mail/misc/42\".
503 `nnir' knows to remove the \"/42\" and to replace \"/\" with \".\" to
504 arrive at the correct group name, \"mail.misc\"."
508 (defcustom nnir-notmuch-program "notmuch"
509 "*Name of notmuch search executable."
514 (defcustom nnir-notmuch-additional-switches '()
515 "*A list of strings, to be given as additional arguments to notmuch.
517 Note that this should be a list. Ie, do NOT use the following:
518 (setq nnir-notmuch-additional-switches \"-i -w\") ; wrong
520 (setq nnir-notmuch-additional-switches '(\"-i\" \"-w\"))"
522 :type '(repeat (string))
525 (defcustom nnir-notmuch-remove-prefix (concat (getenv "HOME") "/Mail/")
526 "*The prefix to remove from each file name returned by notmuch
527 in order to get a group name (albeit with / instead of .). This is a
530 This variable is very similar to `nnir-namazu-remove-prefix', except
531 that it is for notmuch, not Namazu."
536 ;;; Developer Extension Variable:
539 `((imap nnir-run-imap
541 "Imap Search in" ; Prompt
542 ,(mapcar 'car nnir-imap-search-arguments) ; alist for completing
543 nil ; allow any user input
545 nnir-imap-search-argument-history ; the history to use
546 ,nnir-imap-default-search-key ; default
548 (gmane nnir-run-gmane
549 ((gmane-author . "Gmane Author: ")))
550 (swish++ nnir-run-swish++
551 ((swish++-group . "Swish++ Group spec: ")))
552 (swish-e nnir-run-swish-e
553 ((swish-e-group . "Swish-e Group spec: ")))
554 (namazu nnir-run-namazu
556 (notmuch nnir-run-notmuch
558 (hyrex nnir-run-hyrex
559 ((hyrex-group . "Hyrex Group spec: ")))
560 (find-grep nnir-run-find-grep
561 ((grep-options . "Grep options: "))))
562 "Alist of supported search engines.
563 Each element in the alist is a three-element list (ENGINE FUNCTION ARGS).
564 ENGINE is a symbol designating the searching engine. FUNCTION is also
565 a symbol, giving the function that does the search. The third element
566 ARGS is a list of cons pairs (PARAM . PROMPT). When issuing a query,
567 the FUNCTION will issue a query for each of the PARAMs, using PROMPT.
569 The value of `nnir-search-engine' must be one of the ENGINE symbols.
570 For example, for searching a server using namazu include
571 (nnir-search-engine namazu)
572 in the server definition. Note that you have to set additional
573 variables for most backends. For example, the `namazu' backend
574 needs the variables `nnir-namazu-program',
575 `nnir-namazu-index-directory' and `nnir-namazu-remove-prefix'.
577 Add an entry here when adding a new search engine.")
579 (defcustom nnir-method-default-engines '((nnimap . imap) (nntp . gmane))
580 "*Alist of default search engines keyed by server method."
583 :type `(repeat (cons (choice (const nnimap) (const nntp) (const nnspool)
584 (const nneething) (const nndir) (const nnmbox)
585 (const nnml) (const nnmh) (const nndraft)
586 (const nnfolder) (const nnmaildir))
588 ,@(mapcar (lambda (elem) (list 'const (car elem)))
593 (defun gnus-group-make-nnir-group (nnir-extra-parms &optional specs)
594 "Create an nnir group. Prompt for a search query and determine
595 the groups to search as follows: if called from the *Server*
596 buffer search all groups belonging to the server on the current
597 line; if called from the *Group* buffer search any marked groups,
598 or the group on the current line, or all the groups under the
599 current topic. Calling with a prefix-arg prompts for additional
600 search-engine specific constraints. A non-nil `specs' arg must be
601 an alist with `nnir-query-spec' and `nnir-group-spec' keys, and
602 skips all prompting."
605 (or (cdr (assoc 'nnir-group-spec specs))
606 (if (gnus-server-server-name)
607 (list (list (gnus-server-server-name)))
609 (or gnus-group-marked
610 (if (gnus-group-group-name)
611 (list (gnus-group-group-name))
612 (cdr (assoc (gnus-group-topic-name) gnus-topic-alist))))
613 gnus-group-server))))
615 (or (cdr (assoc 'nnir-query-spec specs))
619 (read-string "Query: " nil 'nnir-search-history)))
620 (when nnir-extra-parms
623 (nnir-read-parms (nnir-server-to-search-engine (car x))))
625 (gnus-group-read-ephemeral-group
626 (concat "nnir-" (message-unique-id))
629 ; (cons (current-buffer) gnus-current-window-configuration)
633 (cons 'nnir-specs (list (cons 'nnir-query-spec query-spec)
634 (cons 'nnir-group-spec group-spec)))
635 (cons 'nnir-artlist nil)))))
637 (defun gnus-summary-make-nnir-group (nnir-extra-parms)
638 "Search a group from the summary buffer."
640 (gnus-warp-to-article)
643 (cons 'nnir-group-spec
645 (gnus-group-server gnus-newsgroup-name)
646 (list gnus-newsgroup-name)))))))
647 (gnus-group-make-nnir-group nnir-extra-parms spec)))
650 ;; Gnus backend interface functions.
652 (deffoo nnir-open-server (server &optional definitions)
653 ;; Just set the server variables appropriately.
654 (let ((backend (car (gnus-server-to-method server))))
656 (nnoo-change-server backend server definitions)
657 (add-hook 'gnus-summary-mode-hook 'nnir-mode)
658 (nnoo-change-server 'nnir server definitions))))
660 (deffoo nnir-request-group (group &optional server dont-check info)
661 (nnir-possibly-change-group group server)
662 (let ((pgroup (if (gnus-group-prefixed-p group)
664 (gnus-group-prefixed-name group '(nnir "nnir"))))
666 ;; Check for cached search result or run the query and cache the
668 (unless (and nnir-artlist dont-check)
669 (gnus-group-set-parameter
673 (gnus-group-get-parameter pgroup 'nnir-specs t))))
674 (nnir-request-update-info pgroup (gnus-get-info pgroup)))
675 (with-current-buffer nntp-server-buffer
676 (if (zerop (setq length (nnir-artlist-length nnir-artlist)))
678 (nnir-close-group group)
679 (nnheader-report 'nnir "Search produced empty results."))
680 (nnheader-insert "211 %d %d %d %s\n"
684 group)))) ; group name
687 (deffoo nnir-retrieve-headers (articles &optional group server fetch-old)
688 (with-current-buffer nntp-server-buffer
689 (let ((gnus-inhibit-demon t)
690 (articles-by-group (nnir-categorize
691 articles nnir-article-group nnir-article-ids))
693 (while (not (null articles-by-group))
694 (let* ((group-articles (pop articles-by-group))
695 (artgroup (car group-articles))
696 (articleids (cadr group-articles))
697 (artlist (sort (mapcar 'cdr articleids) '<))
698 (server (gnus-group-server artgroup))
699 (gnus-override-method (gnus-server-to-method server))
701 ;; (nnir-possibly-change-group nil server)
703 (case (setq gnus-headers-retrieved-by
706 nnir-retrieve-headers-override-function
707 (funcall nnir-retrieve-headers-override-function
709 (gnus-retrieve-headers artlist artgroup nil)))
711 (setq parsefunc 'nnheader-parse-nov))
713 (setq parsefunc 'nnheader-parse-head))
714 (t (error "Unknown header type %s while requesting articles \
715 of group %s" gnus-headers-retrieved-by artgroup)))
716 (goto-char (point-min))
718 (let* ((novitem (funcall parsefunc))
720 (mail-header-number novitem)))
721 (art (car (rassq artno articleids))))
723 (mail-header-set-number novitem art)
724 (push novitem headers))
729 (< (mail-header-number x) (mail-header-number y)))))
731 (mapc 'nnheader-insert-nov headers)
734 (deffoo nnir-request-article (article &optional group server to-buffer)
735 (nnir-possibly-change-group group server)
736 (if (and (stringp article)
737 (not (eq 'nnimap (car (gnus-server-to-method server)))))
740 "nnir-request-article only groks message ids for nnimap servers: %s"
743 (let ((article article)
745 (when (stringp article)
746 (setq gnus-override-method (gnus-server-to-method server))
749 (cons 'query (format "HEADER Message-ID %s" article))
752 (unless (and nnir-artlist (equal query nnir-memo-query)
753 (equal server nnir-memo-server))
754 (setq nnir-artlist (nnir-run-imap query server)
755 nnir-memo-query query
756 nnir-memo-server server))
758 (unless (zerop (nnir-artlist-length nnir-artlist))
759 (let ((artfullgroup (nnir-article-group article))
760 (artno (nnir-article-number article)))
761 (message "Requesting article %d from group %s"
764 (with-current-buffer to-buffer
765 (let ((gnus-article-decode-hook nil))
766 (gnus-request-article-this-buffer artno artfullgroup)))
767 (gnus-request-article artno artfullgroup))
768 (cons artfullgroup artno)))))))
770 (deffoo nnir-request-move-article (article group server accept-form
771 &optional last internal-move-group)
772 (nnir-possibly-change-group group server)
773 (let* ((artfullgroup (nnir-article-group article))
774 (artno (nnir-article-number article))
775 (to-newsgroup (nth 1 accept-form))
776 (to-method (gnus-find-method-for-group to-newsgroup))
777 (from-method (gnus-find-method-for-group artfullgroup))
778 (move-is-internal (gnus-server-equal from-method to-method)))
779 (unless (gnus-check-backend-function
780 'request-move-article artfullgroup)
781 (error "The group %s does not support article moving" artfullgroup))
782 (gnus-request-move-article
788 (and move-is-internal
789 to-newsgroup ; Not respooling
790 (gnus-group-real-name to-newsgroup)))))
792 (deffoo nnir-request-expire-articles (articles group &optional server force)
793 (nnir-possibly-change-group group server)
795 (let ((articles-by-group (nnir-categorize
796 articles nnir-article-group nnir-article-ids))
798 (while (not (null articles-by-group))
799 (let* ((group-articles (pop articles-by-group))
800 (artgroup (car group-articles))
801 (articleids (cadr group-articles))
802 (artlist (sort (mapcar 'cdr articleids) '<)))
803 (unless (gnus-check-backend-function 'request-expire-articles
805 (error "The group %s does not support article deletion" artgroup))
806 (unless (gnus-check-server (gnus-find-method-for-group artgroup))
807 (error "Couldn't open server for group %s" artgroup))
808 (push (gnus-request-expire-articles
809 artlist artgroup force)
811 (sort (delq nil not-deleted) '<))
814 (deffoo nnir-warp-to-article ()
815 (nnir-possibly-change-group gnus-newsgroup-name)
816 (let* ((cur (if (> (gnus-summary-article-number) 0)
817 (gnus-summary-article-number)
818 (error "Can't warp to a pseudo-article")))
819 (backend-article-group (nnir-article-group cur))
820 (backend-article-number (nnir-article-number cur))
821 (quit-config (gnus-ephemeral-group-p gnus-newsgroup-name)))
823 ;; what should we do here? we could leave all the buffers around
824 ;; and assume that we have to exit from them one by one. or we can
825 ;; try to clean up directly
827 ;;first exit from the nnir summary buffer.
828 ; (gnus-summary-exit)
829 ;; and if the nnir summary buffer in turn came from another
830 ;; summary buffer we have to clean that summary up too.
831 ; (when (not (eq (cdr quit-config) 'group))
832 ; (gnus-summary-exit))
833 (gnus-summary-read-group-1 backend-article-group t t nil
834 nil (list backend-article-number))))
836 (deffoo nnir-request-update-mark (group article mark)
837 (let ((artgroup (nnir-article-group article))
838 (artnumber (nnir-article-number article)))
839 (gnus-request-update-mark artgroup artnumber mark)))
841 (deffoo nnir-request-set-mark (group actions &optional server)
843 (dolist (action actions)
844 (destructuring-bind (range action marks) action
845 (let ((articles-by-group (nnir-categorize
846 (gnus-uncompress-range range)
847 nnir-article-group nnir-article-number)))
848 (dolist (artgroup articles-by-group)
851 (list (gnus-compress-sequence
852 (sort (cadr artgroup) '<)) action marks)) mlist)))))
853 (dolist (request (nnir-categorize mlist car cadr))
854 (gnus-request-set-mark (car request) (cadr request)))))
857 (deffoo nnir-request-update-info (group info &optional server)
858 (nnir-possibly-change-group group)
859 ;; clear out all existing marks.
860 (gnus-info-set-marks info nil)
861 (gnus-info-set-read info nil)
862 (let ((group (gnus-group-guess-full-name-from-command-method group))
865 (gnus-uncompress-range (cons 1 (nnir-artlist-length nnir-artlist)))
866 nnir-article-group nnir-article-ids)))
867 (gnus-set-active group
868 (cons 1 (nnir-artlist-length nnir-artlist)))
869 (while (not (null articles-by-group))
870 (let* ((group-articles (pop articles-by-group))
871 (articleids (reverse (cadr group-articles)))
872 (group-info (gnus-get-info (car group-articles)))
873 (marks (gnus-info-marks group-info))
874 (read (gnus-info-read group-info)))
878 (gnus-info-read info)
882 (when (gnus-member-of-range (cdr art) read) (car art)))
885 (destructuring-bind (type . range) mark
886 (gnus-add-marked-articles
891 (when (gnus-member-of-range (cdr art) range) (car art)))
895 (deffoo nnir-close-group (group &optional server)
896 (let ((pgroup (if (gnus-group-prefixed-p group)
898 (gnus-group-prefixed-name group '(nnir "nnir")))))
899 (when (and nnir-artlist (not (gnus-ephemeral-group-p pgroup)))
900 (gnus-group-set-parameter pgroup 'nnir-artlist nnir-artlist))
901 (setq nnir-artlist nil)
902 (when (gnus-ephemeral-group-p pgroup)
903 (gnus-kill-ephemeral-group pgroup)
904 (setq gnus-ephemeral-servers
905 (delq (assq 'nnir gnus-ephemeral-servers)
906 gnus-ephemeral-servers)))))
907 ;; (gnus-opened-servers-remove
908 ;; (car (assoc '(nnir "nnir-ephemeral" (nnir-address "nnir"))
909 ;; gnus-opened-servers))))
914 (defmacro nnir-add-result (dirnam artno score prefix server artlist)
915 "Ask `nnir-compose-result' to construct a result vector,
916 and if it is non-nil, add it to artlist."
917 `(let ((result (nnir-compose-result ,dirnam ,artno ,score ,prefix ,server)))
918 (when (not (null result))
919 (push result ,artlist))))
921 (autoload 'nnmaildir-base-name-to-article-number "nnmaildir")
923 ;; Helper function currently used by the Swish++ and Namazu backends;
924 ;; perhaps useful for other backends as well
925 (defun nnir-compose-result (dirnam article score prefix server)
926 "Extract the group from dirnam, and create a result vector
927 ready to be added to the list of search results."
929 ;; remove nnir-*-remove-prefix from beginning of dirnam filename
930 (when (string-match (concat "^" prefix) dirnam)
931 (setq dirnam (replace-match "" t t dirnam)))
933 (when (file-readable-p (concat prefix dirnam article))
934 ;; remove trailing slash and, for nnmaildir, cur/new/tmp
937 (if (string-match "\\`nnmaildir:" (gnus-group-server server))
940 ;; Set group to dirnam without any leading dots or slashes,
941 ;; and with all subsequent slashes replaced by dots
942 (let ((group (gnus-replace-in-string
943 (gnus-replace-in-string dirnam "^[./\\]" "" t)
946 (vector (gnus-group-full-name group server)
947 (if (string-match "\\`nnmaildir:" (gnus-group-server server))
948 (nnmaildir-base-name-to-article-number
949 (substring article 0 (string-match ":" article))
951 (string-to-number article))
952 (string-to-number score)))))
954 ;;; Search Engine Interfaces:
957 (defun nnir-run-imap (query srv &optional groups)
958 "Run a search against an IMAP back-end server.
959 This uses a custom query language parser; see `nnir-imap-make-query' for
960 details on the language and supported extensions."
962 (let ((qstring (cdr (assq 'query query)))
963 (server (cadr (gnus-server-to-method srv)))
964 (defs (caddr (gnus-server-to-method srv)))
965 (criteria (or (cdr (assq 'criteria query))
966 (cdr (assoc nnir-imap-default-search-key
967 nnir-imap-search-arguments))))
968 (gnus-inhibit-demon t)
969 (groups (or groups (nnir-get-active srv))))
970 (message "Opening server %s" server)
978 (when (nnimap-change-group
979 (gnus-group-short-name group) server)
980 (with-current-buffer (nnimap-buffer)
981 (message "Searching %s..." group)
983 (result (nnimap-command "UID SEARCH %s"
984 (if (string= criteria "")
986 (nnir-imap-make-query
987 criteria qstring)))))
990 (let ((artn (string-to-number artnum)))
992 (push (vector group artn 100)
994 (when (assq 'shortcut query)
995 (throw 'found (list artlist)))
996 (setq arts (1+ arts)))))
998 (cdr (assoc "SEARCH" (cdr result)))))
999 (message "Searching %s... %d matches" group arts)))
1000 (message "Searching %s...done" group))
1002 (nreverse artlist)))
1005 (defun nnir-imap-make-query (criteria qstring)
1006 "Parse the query string and criteria into an appropriate IMAP search
1007 expression, returning the string query to make.
1009 This implements a little language designed to return the expected results
1010 to an arbitrary query string to the end user.
1012 The search is always case-insensitive, as defined by RFC2060, and supports
1013 the following features (inspired by the Google search input language):
1015 Automatic \"and\" queries
1016 If you specify multiple words then they will be treated as an \"and\"
1017 expression intended to match all components.
1020 If you wrap your query in double-quotes then it will be treated as a
1024 If you precede a term with \"-\" then it will negate that.
1027 If you include an upper-case \"OR\" in your search it will cause the
1028 term before it and the term after it to be treated as alternatives.
1030 In future the following will be added to the language:
1031 * support for date matches
1032 * support for location of text matching within the query
1033 * from/to/etc headers
1034 * additional search terms
1035 * flag based searching
1036 * anything else that the RFC supports, basically."
1037 ;; Walk through the query and turn it into an IMAP query string.
1038 (nnir-imap-query-to-imap criteria (nnir-imap-parse-query qstring)))
1041 (defun nnir-imap-query-to-imap (criteria query)
1042 "Turn a s-expression format query into IMAP."
1044 ;; Turn the expressions into IMAP text
1046 (nnir-imap-expr-to-imap criteria item))
1047 ;; The query, already in s-expr format.
1049 ;; Append a space between each expression
1053 (defun nnir-imap-expr-to-imap (criteria expr)
1054 "Convert EXPR into an IMAP search expression on CRITERIA"
1055 ;; What sort of expression is this, eh?
1057 ;; Simple string term
1059 (format "%s %S" criteria expr))
1060 ;; Trivial term: and
1061 ((eq expr 'and) nil)
1062 ;; Composite term: or expression
1063 ((eq (car-safe expr) 'or)
1065 (nnir-imap-expr-to-imap criteria (second expr))
1066 (nnir-imap-expr-to-imap criteria (third expr))))
1067 ;; Composite term: just the fax, mam
1068 ((eq (car-safe expr) 'not)
1069 (format "NOT (%s)" (nnir-imap-query-to-imap criteria (rest expr))))
1070 ;; Composite term: just expand it all.
1071 ((and (not (null expr)) (listp expr))
1072 (format "(%s)" (nnir-imap-query-to-imap criteria expr)))
1073 ;; Complex value, give up for now.
1074 (t (error "Unhandled input: %S" expr))))
1077 (defun nnir-imap-parse-query (string)
1078 "Turn STRING into an s-expression based query based on the IMAP
1079 query language as defined in `nnir-imap-make-query'.
1081 This involves turning individual tokens into higher level terms
1082 that the search language can then understand and use."
1084 ;; Set up the parsing environment.
1086 (goto-char (point-min))
1087 ;; Now, collect the output terms and return them.
1089 (while (not (nnir-imap-end-of-input))
1090 (push (nnir-imap-next-expr) out))
1094 (defun nnir-imap-next-expr (&optional count)
1095 "Return the next expression from the current buffer."
1096 (let ((term (nnir-imap-next-term count))
1097 (next (nnir-imap-peek-symbol)))
1098 ;; Are we looking at an 'or' expression?
1100 ;; Handle 'expr or expr'
1102 (list 'or term (nnir-imap-next-expr 2)))
1107 (defun nnir-imap-next-term (&optional count)
1108 "Return the next TERM from the current buffer."
1109 (let ((term (nnir-imap-next-symbol count)))
1110 ;; What sort of term is this?
1112 ;; and -- just ignore it
1113 ((eq term 'and) 'and)
1115 ((eq term 'not) (list 'not (nnir-imap-next-expr)))
1120 (defun nnir-imap-peek-symbol ()
1121 "Return the next symbol from the current buffer, but don't consume it."
1123 (nnir-imap-next-symbol)))
1125 (defun nnir-imap-next-symbol (&optional count)
1126 "Return the next symbol from the current buffer, or nil if we are
1127 at the end of the buffer. If supplied COUNT skips some symbols before
1128 returning the one at the supplied position."
1129 (when (and (numberp count) (> count 1))
1130 (nnir-imap-next-symbol (1- count)))
1131 (let ((case-fold-search t))
1132 ;; end of input stream?
1133 (unless (nnir-imap-end-of-input)
1134 ;; No, return the next symbol from the stream.
1136 ;; negated expression -- return it and advance one char.
1137 ((looking-at "-") (forward-char 1) 'not)
1139 ((looking-at "\"") (nnir-imap-delimited-string "\""))
1140 ;; list expression -- we parse the content and return this as a list.
1142 (nnir-imap-parse-query (nnir-imap-delimited-string ")")))
1143 ;; keyword input -- return a symbol version
1144 ((looking-at "\\band\\b") (forward-char 3) 'and)
1145 ((looking-at "\\bor\\b") (forward-char 2) 'or)
1146 ((looking-at "\\bnot\\b") (forward-char 3) 'not)
1147 ;; Simple, boring keyword
1148 (t (let ((start (point))
1149 (end (if (search-forward-regexp "[[:blank:]]" nil t)
1152 ;; unskip if we hit a non-blank terminal character.
1153 (when (string-match "[^[:blank:]]" (match-string 0))
1155 (goto-char (point-max)))))
1156 (buffer-substring start end)))))))
1158 (defun nnir-imap-delimited-string (delimiter)
1159 "Return a delimited string from the current buffer."
1160 (let ((start (point)) end)
1161 (forward-char 1) ; skip the first delimiter.
1163 (unless (search-forward delimiter nil t)
1164 (error "Unmatched delimited input with %s in query" delimiter))
1165 (let ((here (point)))
1166 (unless (equal (buffer-substring (- here 2) (- here 1)) "\\")
1167 (setq end (point)))))
1168 (buffer-substring (1+ start) (1- end))))
1170 (defun nnir-imap-end-of-input ()
1171 "Are we at the end of input?"
1172 (skip-chars-forward "[[:blank:]]")
1176 ;; Swish++ interface.
1185 (defun nnir-run-swish++ (query server &optional group)
1186 "Run QUERY against swish++.
1187 Returns a vector of (group name, file name) pairs (also vectors,
1190 Tested with swish++ 4.7 on GNU/Linux and with swish++ 5.0b2 on
1194 ;; (error "The swish++ backend cannot search specific groups"))
1197 (let ( (qstring (cdr (assq 'query query)))
1198 (groupspec (cdr (assq 'swish++-group query)))
1199 (prefix (nnir-read-server-parm 'nnir-swish++-remove-prefix server))
1201 ;; nnml-use-compressed-files might be any string, but probably this
1202 ;; is sufficient. Note that we can't only use the value of
1203 ;; nnml-use-compressed-files because old articles might have been
1204 ;; saved with a different value.
1205 (article-pattern (if (string-match "\\`nnmaildir:"
1206 (gnus-group-server server))
1208 "^[0-9]+\\(\\.[a-z0-9]+\\)?$"))
1209 score artno dirnam filenam)
1211 (when (equal "" qstring)
1212 (error "swish++: You didn't enter anything"))
1214 (set-buffer (get-buffer-create nnir-tmp-buffer))
1218 (message "Doing swish++ query %s on %s..." qstring groupspec)
1219 (message "Doing swish++ query %s..." qstring))
1221 (let* ((cp-list `( ,nnir-swish++-program
1222 nil ; input from /dev/null
1224 nil ; don't redisplay
1225 "--config-file" ,(nnir-read-server-parm 'nnir-swish++-configuration-file server)
1226 ,@(nnir-read-server-parm 'nnir-swish++-additional-switches server)
1227 ,qstring ; the query, in swish++ format
1231 (message "%s args: %s" nnir-swish++-program
1232 (mapconcat 'identity (cddddr cp-list) " ")) ;; ???
1233 (apply 'call-process cp-list))))
1234 (unless (or (null exitstatus)
1236 (nnheader-report 'nnir "Couldn't run swish++: %s" exitstatus)
1237 ;; swish++ failure reason is in this buffer, show it if
1238 ;; the user wants it.
1239 (when (> gnus-verbose 6)
1240 (display-buffer nnir-tmp-buffer))))
1242 ;; The results are output in the format of:
1244 ;; rank relative-path-name file-size file-title
1246 ;; rank relative-path-name file-size topic??
1247 ;; where rank is an integer from 1 to 100.
1248 (goto-char (point-min))
1249 (while (re-search-forward
1250 "\\(^[0-9]+\\) \\([^ ]+\\) [0-9]+ \\(.*\\)$" nil t)
1251 (setq score (match-string 1)
1252 filenam (match-string 2)
1253 artno (file-name-nondirectory filenam)
1254 dirnam (file-name-directory filenam))
1256 ;; don't match directories
1257 (when (string-match article-pattern artno)
1258 (when (not (null dirnam))
1260 ;; maybe limit results to matching groups.
1261 (when (or (not groupspec)
1262 (string-match groupspec dirnam))
1263 (nnir-add-result dirnam artno score prefix server artlist)))))
1265 (message "Massaging swish++ output...done")
1270 (function (lambda (x y)
1271 (> (nnir-artitem-rsv x)
1272 (nnir-artitem-rsv y)))))))))
1274 ;; Swish-E interface.
1275 (defun nnir-run-swish-e (query server &optional group)
1276 "Run given query against swish-e.
1277 Returns a vector of (group name, file name) pairs (also vectors,
1280 Tested with swish-e-2.0.1 on Windows NT 4.0."
1282 ;; swish-e crashes with empty parameter to "-w" on commandline...
1284 ;; (error "The swish-e backend cannot search specific groups"))
1287 (let ((qstring (cdr (assq 'query query)))
1289 (or (nnir-read-server-parm 'nnir-swish-e-remove-prefix server)
1290 (error "Missing parameter `nnir-swish-e-remove-prefix'")))
1291 artlist score artno dirnam group )
1293 (when (equal "" qstring)
1294 (error "swish-e: You didn't enter anything"))
1296 (set-buffer (get-buffer-create nnir-tmp-buffer))
1299 (message "Doing swish-e query %s..." query)
1301 (or (nnir-read-server-parm
1302 'nnir-swish-e-index-files server)
1303 (error "Missing parameter `nnir-swish-e-index-files'")))
1304 (additional-switches
1305 (nnir-read-server-parm
1306 'nnir-swish-e-additional-switches server))
1307 (cp-list `(,nnir-swish-e-program
1308 nil ; input from /dev/null
1310 nil ; don't redisplay
1312 ,@additional-switches
1314 ,qstring ; the query, in swish-e format
1318 (message "%s args: %s" nnir-swish-e-program
1319 (mapconcat 'identity (cddddr cp-list) " "))
1320 (apply 'call-process cp-list))))
1321 (unless (or (null exitstatus)
1323 (nnheader-report 'nnir "Couldn't run swish-e: %s" exitstatus)
1324 ;; swish-e failure reason is in this buffer, show it if
1325 ;; the user wants it.
1326 (when (> gnus-verbose 6)
1327 (display-buffer nnir-tmp-buffer))))
1329 ;; The results are output in the format of:
1330 ;; rank path-name file-title file-size
1331 (goto-char (point-min))
1332 (while (re-search-forward
1333 "\\(^[0-9]+\\) \\([^ ]+\\) \"\\([^\"]+\\)\" [0-9]+$" nil t)
1334 (setq score (match-string 1)
1335 artno (match-string 3)
1336 dirnam (file-name-directory (match-string 2)))
1338 ;; don't match directories
1339 (when (string-match "^[0-9]+$" artno)
1340 (when (not (null dirnam))
1342 ;; remove nnir-swish-e-remove-prefix from beginning of dirname
1343 (when (string-match (concat "^" prefix) dirnam)
1344 (setq dirnam (replace-match "" t t dirnam)))
1346 (setq dirnam (substring dirnam 0 -1))
1347 ;; eliminate all ".", "/", "\" from beginning. Always matches.
1348 (string-match "^[./\\]*\\(.*\\)$" dirnam)
1350 (setq group (gnus-replace-in-string (match-string 1 dirnam) "/" "."))
1351 ;; Windows "\\" -> "."
1352 (setq group (gnus-replace-in-string group "\\\\" "."))
1354 (push (vector (gnus-group-full-name group server)
1355 (string-to-number artno)
1356 (string-to-number score))
1359 (message "Massaging swish-e output...done")
1364 (function (lambda (x y)
1365 (> (nnir-artitem-rsv x)
1366 (nnir-artitem-rsv y)))))))))
1369 (defun nnir-run-hyrex (query server &optional group)
1372 (groupspec (cdr (assq 'hyrex-group query)))
1373 (qstring (cdr (assq 'query query)))
1374 (prefix (nnir-read-server-parm 'nnir-hyrex-remove-prefix server))
1376 (when (and (not groupspec) group)
1379 (mapcar (lambda (x) (gnus-group-real-name x)) group))))
1380 (set-buffer (get-buffer-create nnir-tmp-buffer))
1382 (message "Doing hyrex-search query %s..." query)
1384 `( ,nnir-hyrex-program
1385 nil ; input from /dev/null
1387 nil ; don't redisplay
1388 "-i",(nnir-read-server-parm 'nnir-hyrex-index-directory server) ; index directory
1389 ,@(nnir-read-server-parm 'nnir-hyrex-additional-switches server)
1390 ,qstring ; the query, in hyrex-search format
1394 (message "%s args: %s" nnir-hyrex-program
1395 (mapconcat 'identity (cddddr cp-list) " "))
1396 (apply 'call-process cp-list))))
1397 (unless (or (null exitstatus)
1399 (nnheader-report 'nnir "Couldn't run hyrex-search: %s" exitstatus)
1400 ;; nnir-search failure reason is in this buffer, show it if
1401 ;; the user wants it.
1402 (when (> gnus-verbose 6)
1403 (display-buffer nnir-tmp-buffer)))) ;; FIXME: Don't clear buffer !
1404 (message "Doing hyrex-search query \"%s\"...done" qstring)
1406 ;; nnir-search returns:
1407 ;; for nnml/nnfolder: "filename mailid weight"
1408 ;; for nnimap: "group mailid weight"
1409 (goto-char (point-min))
1410 (delete-non-matching-lines "^\\S + [0-9]+ [0-9]+$")
1411 ;; HyREX doesn't search directly in groups -- so filter out here.
1413 (keep-lines groupspec))
1414 ;; extract data from result lines
1415 (goto-char (point-min))
1416 (while (re-search-forward
1417 "\\(\\S +\\) \\([0-9]+\\) \\([0-9]+\\)" nil t)
1418 (setq dirnam (match-string 1)
1419 artno (match-string 2)
1420 score (match-string 3))
1421 (when (string-match prefix dirnam)
1422 (setq dirnam (replace-match "" t t dirnam)))
1423 (push (vector (gnus-group-full-name
1424 (gnus-replace-in-string dirnam "/" ".") server)
1425 (string-to-number artno)
1426 (string-to-number score))
1428 (message "Massaging hyrex-search output...done.")
1431 (function (lambda (x y)
1432 (if (string-lessp (nnir-artitem-group x)
1433 (nnir-artitem-group y))
1435 (< (nnir-artitem-number x)
1436 (nnir-artitem-number y)))))))
1440 (defun nnir-run-namazu (query server &optional group)
1441 "Run given query against Namazu. Returns a vector of (group name, file name)
1442 pairs (also vectors, actually).
1444 Tested with Namazu 2.0.6 on a GNU/Linux system."
1446 ;; (error "The Namazu backend cannot search specific groups"))
1448 (let ((article-pattern (if (string-match "\\`nnmaildir:"
1449 (gnus-group-server server))
1453 (qstring (cdr (assq 'query query)))
1454 (prefix (nnir-read-server-parm 'nnir-namazu-remove-prefix server))
1456 (process-environment (copy-sequence process-environment)))
1457 (setenv "LC_MESSAGES" "C")
1458 (set-buffer (get-buffer-create nnir-tmp-buffer))
1461 `( ,nnir-namazu-program
1462 nil ; input from /dev/null
1464 nil ; don't redisplay
1465 "-q" ; don't be verbose
1466 "-a" ; show all matches
1467 "-s" ; use short format
1468 ,@(nnir-read-server-parm 'nnir-namazu-additional-switches server)
1469 ,qstring ; the query, in namazu format
1470 ,(nnir-read-server-parm 'nnir-namazu-index-directory server) ; index directory
1474 (message "%s args: %s" nnir-namazu-program
1475 (mapconcat 'identity (cddddr cp-list) " "))
1476 (apply 'call-process cp-list))))
1477 (unless (or (null exitstatus)
1479 (nnheader-report 'nnir "Couldn't run namazu: %s" exitstatus)
1480 ;; Namazu failure reason is in this buffer, show it if
1481 ;; the user wants it.
1482 (when (> gnus-verbose 6)
1483 (display-buffer nnir-tmp-buffer))))
1485 ;; Namazu output looks something like this:
1486 ;; 2. Re: Gnus agent expire broken (score: 55)
1487 ;; /home/henrik/Mail/mail/sent/1310 (4,138 bytes)
1489 (goto-char (point-min))
1490 (while (re-search-forward
1491 "^\\([0-9]+\\.\\).*\\((score: \\([0-9]+\\)\\))\n\\([^ ]+\\)"
1493 (setq score (match-string 3)
1494 group (file-name-directory (match-string 4))
1495 article (file-name-nondirectory (match-string 4)))
1497 ;; make sure article and group is sane
1498 (when (and (string-match article-pattern article)
1500 (nnir-add-result group article score prefix server artlist)))
1502 ;; sort artlist by score
1505 (function (lambda (x y)
1506 (> (nnir-artitem-rsv x)
1507 (nnir-artitem-rsv y)))))))))
1509 (defun nnir-run-notmuch (query server &optional group)
1510 "Run QUERY against notmuch.
1511 Returns a vector of (group name, file name) pairs (also vectors,
1515 ;; (error "The notmuch backend cannot search specific groups"))
1518 (let ( (qstring (cdr (assq 'query query)))
1519 (groupspec (cdr (assq 'notmuch-group query)))
1520 (prefix (nnir-read-server-parm 'nnir-notmuch-remove-prefix server))
1522 (article-pattern (if (string-match "\\`nnmaildir:"
1523 (gnus-group-server server))
1526 artno dirnam filenam)
1528 (when (equal "" qstring)
1529 (error "notmuch: You didn't enter anything"))
1531 (set-buffer (get-buffer-create nnir-tmp-buffer))
1535 (message "Doing notmuch query %s on %s..." qstring groupspec)
1536 (message "Doing notmuch query %s..." qstring))
1538 (let* ((cp-list `( ,nnir-notmuch-program
1539 nil ; input from /dev/null
1541 nil ; don't redisplay
1545 ,@(nnir-read-server-parm 'nnir-notmuch-additional-switches server)
1546 ,qstring ; the query, in notmuch format
1550 (message "%s args: %s" nnir-notmuch-program
1551 (mapconcat 'identity (cddddr cp-list) " ")) ;; ???
1552 (apply 'call-process cp-list))))
1553 (unless (or (null exitstatus)
1555 (nnheader-report 'nnir "Couldn't run notmuch: %s" exitstatus)
1556 ;; notmuch failure reason is in this buffer, show it if
1557 ;; the user wants it.
1558 (when (> gnus-verbose 6)
1559 (display-buffer nnir-tmp-buffer))))
1561 ;; The results are output in the format of:
1562 ;; absolute-path-name
1563 (goto-char (point-min))
1565 (setq filenam (buffer-substring-no-properties (line-beginning-position)
1566 (line-end-position))
1567 artno (file-name-nondirectory filenam)
1568 dirnam (file-name-directory filenam))
1571 ;; don't match directories
1572 (when (string-match article-pattern artno)
1573 (when (not (null dirnam))
1575 ;; maybe limit results to matching groups.
1576 (when (or (not groupspec)
1577 (string-match groupspec dirnam))
1578 (nnir-add-result dirnam artno "" prefix server artlist)))))
1580 (message "Massaging notmuch output...done")
1584 (defun nnir-run-find-grep (query server &optional grouplist)
1585 "Run find and grep to obtain matching articles."
1586 (let* ((method (gnus-server-to-method server))
1588 (concat (symbol-name (car method)) "-directory")))
1589 (directory (cadr (assoc sym (cddr method))))
1590 (regexp (cdr (assoc 'query query)))
1591 (grep-options (cdr (assoc 'grep-options query)))
1592 (grouplist (or grouplist (nnir-get-active server))))
1594 (error "No directory found in method specification of server %s"
1601 (message "Searching %s using find-grep..."
1603 (save-window-excursion
1604 (set-buffer (get-buffer-create nnir-tmp-buffer))
1605 (if (> gnus-verbose 6)
1606 (pop-to-buffer (current-buffer)))
1607 (cd directory) ; Using relative paths simplifies
1612 ;; Try accessing the group literally as
1613 ;; well as interpreting dots as directory
1614 ;; separators so the engine works with
1615 ;; plain nnml as well as the Gnus Cache.
1616 (let ((group (gnus-group-real-name group)))
1617 ;; Replace cl-func find-if.
1618 (if (file-directory-p group)
1620 (if (file-directory-p
1622 (gnus-replace-in-string
1627 (error "Cannot locate directory for group"))
1630 'call-process "find" nil t
1631 "find" group "-maxdepth" "1" "-type" "f"
1632 "-name" "[0-9]*" "-exec"
1634 `("-l" ,@(and grep-options
1635 (split-string grep-options "\\s-" t))
1636 "-e" ,regexp "{}" "+"))))
1638 ;; Translate relative paths to group names.
1640 (let* ((path (split-string
1643 (line-end-position)) "/" t))
1644 (art (string-to-number (car (last path)))))
1645 (while (string= "." (car path))
1646 (setq path (cdr path)))
1647 (let ((group (mapconcat 'identity
1649 ;; (subseq path 0 -1)
1650 (let ((end (1- (length path)))
1653 (>= (setq end (1- end)) 0)
1654 (push (pop path) res))
1658 (vector (gnus-group-full-name group server) art 0)
1661 (message "Searching %s using find-grep...done"
1666 (declare-function mm-url-insert "mm-url" (url &optional follow-refresh))
1667 (declare-function mm-url-encode-www-form-urlencoded "mm-url" (pairs))
1670 (defun nnir-run-gmane (query srv &optional groups)
1671 "Run a search against a gmane back-end server."
1672 (let* ((case-fold-search t)
1673 (qstring (cdr (assq 'query query)))
1674 (server (cadr (gnus-server-to-method srv)))
1675 (groupspec (mapconcat
1677 (if (gnus-string-match-p "gmane" x)
1678 (format "group:%s" (gnus-group-short-name x))
1679 (error "Can't search non-gmane groups: %s" x)))
1682 (if (assq 'gmane-author query)
1683 (format "author:%s" (cdr (assq 'gmane-author query))) ""))
1684 (search (format "%s %s %s"
1685 qstring groupspec authorspec))
1686 (gnus-inhibit-demon t)
1689 (with-current-buffer (get-buffer-create nnir-tmp-buffer)
1693 "http://search.gmane.org/nov.php"
1695 (mm-url-encode-www-form-urlencoded
1696 `(("query" . ,search)
1697 ("HITSPERPAGE" . "999")))))
1698 (unless (featurep 'xemacs) (set-buffer-multibyte t))
1699 (mm-decode-coding-region (point-min) (point-max) 'utf-8)
1700 (goto-char (point-min))
1703 (unless (or (eolp) (looking-at "\x0d"))
1704 (let ((header (nnheader-parse-nov)))
1705 (let ((xref (mail-header-xref header))
1706 (xscore (string-to-number (cdr (assoc 'X-Score
1707 (mail-header-extra header))))))
1708 (when (string-match " \\([^:]+\\)[:/]\\([0-9]+\\)" xref)
1711 (gnus-group-prefixed-name (match-string 1 xref) srv)
1712 (string-to-number (match-string 2 xref)) xscore)
1715 (apply 'vector (nreverse (mm-delete-duplicates artlist)))))
1719 (defun gnus-nnir-group-p (group)
1720 "Say whether GROUP is nnir or not."
1721 (if (gnus-group-prefixed-p group)
1722 (eq 'nnir (car (gnus-find-method-for-group group)))
1723 (and group (string-match "^nnir" group))))
1725 (defun nnir-read-parms (nnir-search-engine)
1726 "Reads additional search parameters according to `nnir-engines'."
1727 (let ((parmspec (caddr (assoc nnir-search-engine nnir-engines))))
1728 (mapcar 'nnir-read-parm parmspec)))
1730 (defun nnir-read-parm (parmspec)
1731 "Reads a single search parameter.
1732 `parmspec' is a cons cell, the car is a symbol, the cdr is a prompt."
1733 (let ((sym (car parmspec))
1734 (prompt (cdr parmspec)))
1736 (let* ((result (apply 'gnus-completing-read prompt))
1737 (mapping (or (assoc result nnir-imap-search-arguments)
1738 (cons nil nnir-imap-search-other))))
1739 (cons sym (format (cdr mapping) result)))
1740 (cons sym (read-string prompt)))))
1742 (defun nnir-run-query (specs)
1743 "Invoke appropriate search engine function (see `nnir-engines')."
1747 (let* ((server (car x))
1748 (search-engine (nnir-server-to-search-engine server))
1749 (search-func (cadr (assoc search-engine nnir-engines))))
1751 (funcall search-func (cdr (assq 'nnir-query-spec specs))
1753 (cdr (assq 'nnir-group-spec specs)))))
1755 (defun nnir-server-to-search-engine (server)
1756 (or (nnir-read-server-parm 'nnir-search-engine server t)
1757 (cdr (assoc (car (gnus-server-to-method server))
1758 nnir-method-default-engines))))
1760 (defun nnir-read-server-parm (key server &optional not-global)
1761 "Returns the parameter value corresponding to `key' for
1762 `server'. If no server-specific value is found consult the global
1763 environment unless `not-global' is non-nil."
1764 (let ((method (gnus-server-to-method server)))
1765 (cond ((and method (assq key (cddr method)))
1766 (nth 1 (assq key (cddr method))))
1767 ((and (not not-global) (boundp key)) (symbol-value key))
1770 (defun nnir-possibly-change-group (group &optional server)
1771 (or (not server) (nnir-server-opened server) (nnir-open-server server))
1772 (when (gnus-nnir-group-p group)
1773 (setq nnir-artlist (gnus-group-get-parameter
1774 (gnus-group-prefixed-name
1775 (gnus-group-short-name group) '(nnir "nnir"))
1778 (defun nnir-server-opened (&optional server)
1779 (let ((backend (car (gnus-server-to-method server))))
1780 (nnoo-current-server-p (or backend 'nnir) server)))
1782 (defun nnir-search-thread (header)
1783 "Make an nnir group based on the thread containing the article
1784 header. The current server will be searched. If the registry is
1785 installed, the server that the registry reports the current
1786 article came from is also searched."
1788 (list (cons 'query (nnimap-make-thread-query header))
1789 (cons 'criteria "")))
1791 (list (list (gnus-method-to-server
1792 (gnus-find-method-for-group gnus-newsgroup-name)))))
1793 (registry-group (and
1794 (gnus-bound-and-true-p 'gnus-registry-enabled)
1795 (car (gnus-registry-get-id-key
1796 (mail-header-id header) 'group))))
1799 (gnus-method-to-server
1800 (gnus-find-method-for-group registry-group)))))
1801 (when registry-server (add-to-list 'server (list registry-server)))
1802 (gnus-group-make-nnir-group nil (list
1803 (cons 'nnir-query-spec query)
1804 (cons 'nnir-group-spec server)))
1805 (gnus-summary-goto-subject (gnus-id-to-article (mail-header-id header)))))
1807 (defun nnir-get-active (srv)
1808 (let ((method (gnus-server-to-method srv))
1810 (gnus-request-list method)
1811 (with-current-buffer nntp-server-buffer
1812 (let ((cur (current-buffer))
1814 (goto-char (point-min))
1815 (unless (or (null nnir-ignored-newsgroups)
1816 (string= nnir-ignored-newsgroups ""))
1817 (delete-matching-lines nnir-ignored-newsgroups))
1818 (if (eq (car method) 'nntp)
1821 (push (mm-string-as-unibyte
1822 (gnus-group-full-name
1826 (skip-chars-forward "^ \t")
1832 (push (mm-string-as-unibyte
1833 (if (eq (char-after) ?\")
1834 (gnus-group-full-name (read cur) method)
1835 (let ((p (point)) (name ""))
1836 (skip-chars-forward "^ \t\\\\")
1837 (setq name (buffer-substring p (point)))
1838 (while (eq (char-after) ?\\)
1839 (setq p (1+ (point)))
1841 (skip-chars-forward "^ \t\\\\")
1842 (setq name (concat name (buffer-substring
1844 (gnus-group-full-name name method))))
1849 (defun nnir-registry-action (action data-header from &optional to method)
1850 "Call `gnus-registry-action' with the original article group."
1851 (gnus-registry-action
1854 (nnir-article-group (mail-header-number data-header))
1859 (when (eq (car (gnus-find-method-for-group gnus-newsgroup-name)) 'nnir)
1860 (setq gnus-summary-line-format
1861 (or nnir-summary-line-format gnus-summary-line-format))
1862 (when (gnus-bound-and-true-p 'gnus-registry-enabled)
1863 (remove-hook 'gnus-summary-article-delete-hook 'gnus-registry-action t)
1864 (remove-hook 'gnus-summary-article-move-hook 'gnus-registry-action t)
1865 (remove-hook 'gnus-summary-article-expire-hook 'gnus-registry-action t)
1866 (add-hook 'gnus-summary-article-delete-hook 'nnir-registry-action t t)
1867 (add-hook 'gnus-summary-article-move-hook 'nnir-registry-action t t)
1868 (add-hook 'gnus-summary-article-expire-hook 'nnir-registry-action t t))))
1871 (defun gnus-summary-create-nnir-group ()
1873 (let ((name (gnus-read-group "Group name: "))
1875 (pgroup (if (gnus-group-prefixed-p gnus-newsgroup-name)
1877 (gnus-group-prefixed-name
1878 gnus-newsgroup-name '(nnir "nnir")))))
1879 (with-current-buffer gnus-group-buffer
1880 (gnus-group-make-group
1882 (gnus-group-find-parameter pgroup)))))
1885 (deffoo nnir-request-create-group (group &optional server args)
1886 (message "Creating nnir group %s" group)
1887 (let* ((group (gnus-group-prefixed-name group '(nnir "nnir")))
1888 (specs (assoc 'nnir-specs args))
1890 (or (cdr (assoc 'nnir-query-spec specs))
1892 (read-string "Query: " nil 'nnir-search-history)))))
1894 (or (cdr (assoc 'nnir-group-spec specs))
1895 (list (list (read-string "Server: " nil nil)))))
1896 (nnir-specs (list (cons 'nnir-query-spec query-spec)
1897 (cons 'nnir-group-spec group-spec))))
1898 (gnus-group-set-parameter group 'nnir-specs nnir-specs)
1899 (gnus-group-set-parameter
1901 (or (cdr (assoc 'nnir-artlist args))
1902 (nnir-run-query nnir-specs)))
1903 (nnir-request-update-info group (gnus-get-info group)))
1906 (deffoo nnir-request-delete-group (group &optional force server)
1909 (deffoo nnir-request-list (&optional server)
1912 (deffoo nnir-request-scan (group method)
1915 (deffoo nnir-request-close ()
1918 (nnoo-define-skeleton nnir)
1923 ;;; nnir.el ends here