contrib/gnus-namazu.el

   1 ;;; gnus-namazu.el --- Search mail with Namazu -*- coding: iso-2022-7bit; -*-
   2
   3 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004
   4 ;; TSUCHIYA Masatoshi <tsuchiya@namazu.org>
   5
   6 ;; Author: TSUCHIYA Masatoshi <tsuchiya@namazu.org>
   7 ;; Keywords: mail searching namazu
   8
   9 ;; This program is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 3, or (at your option)
  12 ;; any later version.
  13
  14 ;; This program is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with this program; if not, you can either send email to this
  21 ;; program's maintainer or write to: The Free Software Foundation,
  22 ;; Inc.; 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  23
  24
  25 ;;; Commentary:
  26
  27 ;; This file defines the command to search mails and persistent
  28 ;; articles with Namazu and to browse its results with Gnus.
  29 ;;
  30 ;; Namazu is a full-text search engine intended for easy use.  For
  31 ;; more detail about Namazu, visit the following page:
  32 ;;
  33 ;;     http://namazu.org/
  34
  35
  36 ;;; Quick Start:
  37
  38 ;; If this module has already been installed, only four steps are
  39 ;; required to search articles with this module.
  40 ;;
  41 ;;   (1) Install Namazu.
  42 ;;
  43 ;;   (2) Put this expression into your ~/.gnus.
  44 ;;
  45 ;;          (gnus-namazu-insinuate)
  46 ;;
  47 ;;   (3) Start Gnus and type M-x gnus-namazu-create-index RET to make
  48 ;;       index of articles.
  49 ;;
  50 ;;   (4) In group buffer or in summary buffer, type C-c C-n query RET.
  51
  52
  53 ;;; Install:
  54
  55 ;; Before installing this module, you must install Namazu.
  56 ;;
  57 ;; When you would like to byte-compile this module in Gnus, put this
  58 ;; file into the lisp/ directory in the Gnus source tree and run `make
  59 ;; install'.  And then, put the following expression into your
  60 ;; ~/.gnus.
  61 ;;
  62 ;;      (gnus-namazu-insinuate)
  63 ;;
  64 ;; In order to make index of articles with Namazu before using this
  65 ;; module, type M-x gnus-namazu-create-index RET.  Otherwise, you can
  66 ;; create index by yourself with the following commands:
  67 ;;
  68 ;;      % mkdir ~/News/namazu
  69 ;;      % mknmz -a -h -O ~/News/namazu ~/Mail ~/News/cache
  70 ;;
  71 ;; The first command makes the directory for index files, and the
  72 ;; second command generates index files of mails and persistent
  73 ;; articles.
  74 ;;
  75 ;; In order to update indices for incoming articles, this module
  76 ;; automatically runs mknmz, the indexer of Namazu, at an interval of
  77 ;; 3 days; this period is set to `gnus-namazu-index-update-interval'.
  78 ;;
  79 ;; Indices will be updated when `gnus-namazu-search' is called.  If
  80 ;; you want to update indices everywhen Gnus is started, you can put
  81 ;; the following expression to your ~/.gnus.
  82 ;;
  83 ;;      (add-hook 'gnus-startup-hook 'gnus-namazu-update-all-indices)
  84 ;;
  85 ;; In order to control mknmz closely, disable the automatic updating
  86 ;; feature and run mknmz by yourself.  In this case, set nil to the
  87 ;; above option.
  88 ;;
  89 ;;      (setq gnus-namazu-index-update-interval nil)
  90 ;;
  91 ;; When your index is put into the directory other than the default
  92 ;; one (~/News/namazu), it is necessary to set its place to
  93 ;; `gnus-namazu-index-directories' as follows:
  94 ;;
  95 ;;      (setq gnus-namazu-index-directories
  96 ;;            (list (expand-file-name "~/namazu")))
  97
  98
  99 ;;; Code:
 100
 101 (eval-when-compile (require 'cl))
 102 (require 'nnoo)
 103 (require 'nnheader)
 104 (require 'nnmail)
 105 (require 'gnus-sum)
 106
 107 ;; To suppress byte-compile warning.
 108 (eval-when-compile
 109   (defvar nnml-directory)
 110   (defvar nnmh-directory))
 111
 112
 113 (defgroup gnus-namazu nil
 114   "Search nnmh and nnml groups in Gnus with Namazu."
 115   :group 'namazu
 116   :group 'gnus
 117   :prefix "gnus-namazu-")
 118
 119 (defconst gnus-namazu-default-index-directory
 120   (expand-file-name "namazu" gnus-directory)
 121   "Default place of Namazu index files.")
 122
 123 (defcustom gnus-namazu-index-directories
 124   (list
 125    (or (and (boundp 'gnus-namazu-index-directory)
 126             (symbol-value 'gnus-namazu-index-directory))
 127        (and (boundp 'nnir-namazu-index-directory)
 128             (symbol-value 'nnir-namazu-index-directory))
 129        gnus-namazu-default-index-directory))
 130   "*Places of Namazu index files."
 131   :type '(repeat directory)
 132   :group 'gnus-namazu)
 133
 134 (defcustom gnus-namazu-command
 135   (or (and (boundp 'namazu-command)
 136            (symbol-value 'namazu-command))
 137       (and (boundp 'nnir-namazu-program)
 138            (symbol-value 'nnir-namazu-program))
 139       "namazu")
 140   "*Name of the executable file of Namazu."
 141   :type 'string
 142   :group 'gnus-namazu)
 143
 144 (defcustom gnus-namazu-command-prefix nil
 145   "*Prefix commands to execute Namazu.
 146 If you put your index on a remote server, set this option as follows:
 147
 148     (setq gnus-namazu-command-prefix
 149           '(\"ssh\" \"-x\" \"remote-server\"))
 150
 151 This makes gnus-namazu execute \"ssh -x remote-server namazu ...\"
 152 instead of executing \"namazu\" directly."
 153   :type '(repeat string)
 154   :group 'gnus-namazu)
 155
 156 (defcustom gnus-namazu-additional-arguments nil
 157   "*Additional arguments of Namazu.
 158 The options `-q', `-a', and `-l' are always used, very few other
 159 options make any sense in this context."
 160   :type '(repeat string)
 161   :group 'gnus-namazu)
 162
 163 (defcustom gnus-namazu-index-update-interval
 164   259200                                ; 3 days == 259200 seconds.
 165   "*Number of seconds between running the indexer of Namazu."
 166   :type '(choice (const :tag "Never run the indexer" nil)
 167                  (integer :tag "Number of seconds"))
 168   :group 'gnus-namazu)
 169
 170 (defcustom gnus-namazu-make-index-command "mknmz"
 171   "*Name of the executable file of the indexer of Namazu."
 172   :type 'string
 173   :group 'gnus-namazu)
 174
 175 (defcustom gnus-namazu-make-index-arguments
 176   (nconc
 177    (list "--all" "--mailnews" "--deny=^.*[^0-9].*$")
 178    (when (and (boundp 'current-language-environment)
 179               (string= "Japanese"
 180                        (symbol-value 'current-language-environment)))
 181      (list "--indexing-lang=ja")))
 182   "*Arguments of the indexer of Namazu."
 183   :type '(repeat string)
 184   :group 'gnus-namazu)
 185
 186 (defcustom gnus-namazu-field-keywords
 187   '("date" "from" "newsgroups" "size" "subject" "summary" "to" "uri")
 188   "*List of keywords to do field-search."
 189   :type '(repeat string)
 190   :group 'gnus-namazu)
 191
 192 (defcustom gnus-namazu-coding-system
 193   (if (memq system-type '(windows-nt OS/2 emx))
 194       'shift_jis
 195     'euc-japan)
 196   "*Coding system for Namazu process."
 197   :type 'coding-system
 198   :group 'gnus-namazu)
 199
 200 (defcustom gnus-namazu-need-path-normalization
 201   (and (memq system-type '(windows-nt OS/2 emx)) t)
 202   "*Non-nil means that outputs of namazu may contain drive letters."
 203   :type 'boolean
 204   :group 'gnus-namazu)
 205
 206 (defcustom gnus-namazu-case-sensitive-filesystem
 207   (not (eq system-type 'windows-nt))
 208   "*Non-nil means that the using file system distinguishes cases of characters."
 209   :type 'boolean
 210   :group 'gnus-namazu)
 211
 212 (defcustom gnus-namazu-query-highlight t
 213   "Non-nil means that queried words is highlighted."
 214   :type 'boolean
 215   :group 'gnus-namazu)
 216
 217 (defface gnus-namazu-query-highlight-face
 218   '((((type tty pc) (class color))
 219      (:background "magenta4" :foreground "cyan1"))
 220     (((class color) (background light))
 221      (:background "magenta4" :foreground "lightskyblue1"))
 222     (((class color) (background dark))
 223      (:background "palevioletred2" :foreground "brown4"))
 224     (t (:inverse-video t)))
 225   "Face used for namazu query matching words."
 226   :group 'gnus-namazu)
 227
 228 (defcustom gnus-namazu-remote-groups nil
 229   "*Alist of regular expressions matching remote groups and their base paths.
 230 If you use an IMAP server and have a special index, set this option as
 231 follows:
 232
 233     (setq gnus-namazu-remote-groups
 234           '((\"^nnimap\\\\+server:INBOX\\\\.\" . \"~/Maildir/.\")))
 235
 236 This means that the group \"nnimap+server:INBOX.group\" is placed in
 237 \"~/Maildir/.group\"."
 238   :group 'gnus-namazu
 239   :type '(repeat
 240           (cons (choice (regexp :tag "Regexp of group name")
 241                         (const :tag "Groups served by `gnus-select-method'" t))
 242                 (string :tag "Base path of groups")))
 243   :set (lambda (symbol value)
 244          (prog1 (set-default symbol value)
 245            (when (featurep 'gnus-namazu)
 246              (gnus-namazu/make-directory-table t)))))
 247
 248 ;;; Internal Variable:
 249 (defconst gnus-namazu/group-name-regexp "\\`nnvirtual:namazu-search\\?")
 250
 251 ;; Multibyte group name:
 252 (and
 253  (fboundp 'gnus-group-decoded-name)
 254  (let ((gnus-group-name-charset-group-alist
 255         (list (cons gnus-namazu/group-name-regexp gnus-namazu-coding-system)))
 256        (query (decode-coding-string (string 27 36 66 52 65 59 122 27 40 66)
 257                                     'iso-2022-7bit)))
 258    (not (string-match query
 259                       (gnus-summary-buffer-name
 260                        (encode-coding-string
 261                         (concat "nnvirtual:namazu-search?query=" query)
 262                         gnus-namazu-coding-system)))))
 263  (let (current-load-list)
 264    (defadvice gnus-summary-buffer-name
 265      (before gnus-namazu-summary-buffer-name activate compile)
 266      "Advised by `gnus-namazu' to handle encoded group names."
 267      (ad-set-arg 0 (gnus-group-decoded-name (ad-get-arg 0))))))
 268
 269 (defmacro gnus-namazu/make-article (group number)
 270   `(cons ,group ,number))
 271 (defmacro gnus-namazu/article-group  (x) `(car ,x))
 272 (defmacro gnus-namazu/article-number (x) `(cdr ,x))
 273
 274 (defsubst gnus-namazu/indexed-servers ()
 275   "Choice appropriate servers from opened ones, and return thier list."
 276   (append
 277    (gnus-servers-using-backend 'nnml)
 278    (gnus-servers-using-backend 'nnmh)))
 279
 280 (defsubst gnus-namazu/default-index-directory ()
 281   (if (member gnus-namazu-default-index-directory
 282               gnus-namazu-index-directories)
 283       gnus-namazu-default-index-directory
 284     (car gnus-namazu-index-directories)))
 285
 286 (defun gnus-namazu/setup ()
 287   (and (boundp 'gnus-group-name-charset-group-alist)
 288        (not (member (cons gnus-namazu/group-name-regexp
 289                           gnus-namazu-coding-system)
 290                     gnus-group-name-charset-group-alist))
 291        (let ((pair (assoc gnus-namazu/group-name-regexp
 292                           gnus-group-name-charset-group-alist)))
 293          (if pair
 294              (setcdr pair gnus-namazu-coding-system)
 295            (push (cons gnus-namazu/group-name-regexp
 296                        gnus-namazu-coding-system)
 297                  gnus-group-name-charset-group-alist))))
 298   (unless gnus-namazu-command-prefix
 299     (gnus-namazu-update-all-indices)))
 300
 301 (defun gnus-namazu/server-directory (server)
 302   "Return the top directory of the server SERVER."
 303   (and (memq (car server) '(nnml nnmh))
 304        (nnoo-change-server (car server) (nth 1 server) (nthcdr 2 server))
 305        (file-name-as-directory
 306         (expand-file-name (if (eq 'nnml (car server))
 307                               nnml-directory
 308                             nnmh-directory)))))
 309
 310 ;;; Functions to call Namazu.
 311 (defsubst gnus-namazu/normalize-results ()
 312   "Normalize file names returned by Namazu in this current buffer."
 313   (goto-char (point-min))
 314   (while (not (eobp))
 315     (when (looking-at "file://")
 316       (delete-region (point) (match-end 0)))
 317     (when (if gnus-namazu-need-path-normalization
 318               (or (not (looking-at "/\\(.\\)|/"))
 319                   (replace-match "\\1:/"))
 320             (eq ?~ (char-after (point))))
 321       (insert (expand-file-name
 322                (buffer-substring (point-at-bol) (point-at-eol))))
 323       (delete-region (point) (point-at-eol)))
 324     (forward-line 1)))
 325
 326 (defsubst gnus-namazu/call-namazu (query)
 327   (let ((coding-system-for-read gnus-namazu-coding-system)
 328         (coding-system-for-write gnus-namazu-coding-system)
 329         (default-process-coding-system
 330           (cons gnus-namazu-coding-system gnus-namazu-coding-system))
 331         program-coding-system-alist
 332         (file-name-coding-system gnus-namazu-coding-system)
 333         (commands
 334          (append gnus-namazu-command-prefix
 335                  (list gnus-namazu-command
 336                        "-q"             ; don't be verbose
 337                        "-a"             ; show all matches
 338                        "-l")            ; use list format
 339                  gnus-namazu-additional-arguments
 340                  (list (if gnus-namazu-command-prefix
 341                            (concat "'" query "'")
 342                          query))
 343                  gnus-namazu-index-directories)))
 344     (apply 'call-process (car commands) nil t nil (cdr commands))))
 345
 346 (defvar gnus-namazu/directory-table nil)
 347 (defun gnus-namazu/make-directory-table (&optional force)
 348   (interactive (list t))
 349   (unless (and (not force)
 350                gnus-namazu/directory-table
 351                (eq gnus-namazu-case-sensitive-filesystem
 352                    (car gnus-namazu/directory-table)))
 353     (let ((table (make-vector (length gnus-newsrc-hashtb) 0))
 354           cache agent alist dir method)
 355       (mapatoms
 356        (lambda (group)
 357          (unless (gnus-ephemeral-group-p (setq group (symbol-name group)))
 358            (when (file-directory-p
 359                   (setq dir (file-name-as-directory
 360                              (gnus-cache-file-name group ""))))
 361              (push (cons dir group) cache))
 362            (when (file-directory-p
 363                   (setq dir (gnus-agent-group-pathname group)))
 364              (push (cons dir group) agent))
 365            (when (memq (car (setq method (gnus-find-method-for-group group)))
 366                        '(nnml nnmh))
 367              (when (file-directory-p
 368                     (setq dir (nnmail-group-pathname
 369                                (gnus-group-short-name group)
 370                                (gnus-namazu/server-directory method))))
 371                (push (cons dir group) alist)))
 372            (dolist (pair gnus-namazu-remote-groups)
 373              (when (setq dir
 374                          (or (and (eq t (car pair))
 375                                   (gnus-method-equal method gnus-select-method)
 376                                   group)
 377                              (and (stringp (car pair))
 378                                   (string-match (car pair) group)
 379                                   (substring group (match-end 0)))))
 380                (setq dir (nnmail-group-pathname dir "/"))
 381                (push (cons (concat (cdr pair)
 382                                    ;; nnmail-group-pathname() on some
 383                                    ;; systems returns pathnames which
 384                                    ;; have drive letters at their top.
 385                                    (substring dir (1+ (string-match "/" dir))))
 386                            group)
 387                      alist)))))
 388        gnus-newsrc-hashtb)
 389       (dolist (pair (nconc agent cache alist))
 390         (set (intern (if gnus-namazu-case-sensitive-filesystem
 391                          (car pair)
 392                        (downcase (car pair)))
 393                      table)
 394              (cdr pair)))
 395       (setq gnus-namazu/directory-table
 396             (cons gnus-namazu-case-sensitive-filesystem table)))))
 397
 398 (defun gnus-namazu/search (groups query)
 399   (gnus-namazu/make-directory-table)
 400   (with-temp-buffer
 401     (let ((exit-status (gnus-namazu/call-namazu query)))
 402       (unless (zerop exit-status)
 403         (error "Namazu finished abnormally: %d" exit-status)))
 404     (gnus-namazu/normalize-results)
 405     (goto-char (point-min))
 406     (let (articles group)
 407       (while (not (eobp))
 408         (setq group (buffer-substring-no-properties
 409                      (point)
 410                      (progn
 411                        (end-of-line)
 412                        ;; NOTE: Only numeric characters are permitted
 413                        ;; as file names of articles.
 414                        (skip-chars-backward "0-9")
 415                        (point))))
 416         (and (setq group
 417                    (symbol-value
 418                     (intern-soft (if gnus-namazu-case-sensitive-filesystem
 419                                      group
 420                                    (downcase group))
 421                                  (cdr gnus-namazu/directory-table))))
 422              (or (not groups)
 423                  (member group groups))
 424              (push (gnus-namazu/make-article
 425                     group
 426                     (string-to-number
 427                      (buffer-substring-no-properties (point)
 428                                                      (point-at-eol))))
 429                    articles))
 430         (forward-line 1))
 431       (nreverse articles))))
 432
 433 ;;; User Interface:
 434 (defun gnus-namazu/get-target-groups ()
 435   (cond
 436    ((eq major-mode 'gnus-group-mode)
 437     ;; In Group buffer.
 438     (cond
 439      (current-prefix-arg
 440       (gnus-group-process-prefix current-prefix-arg))
 441      (gnus-group-marked
 442       (prog1 gnus-group-marked (gnus-group-unmark-all-groups)))))
 443    ((eq major-mode 'gnus-summary-mode)
 444     ;; In Summary buffer.
 445     (if current-prefix-arg
 446         (list (gnus-read-group "Group: "))
 447       (if (and
 448            (gnus-ephemeral-group-p gnus-newsgroup-name)
 449            (string-match gnus-namazu/group-name-regexp gnus-newsgroup-name))
 450           (cadr (assq 'gnus-namazu-target-groups
 451                       (gnus-info-method (gnus-get-info gnus-newsgroup-name))))
 452         (list gnus-newsgroup-name))))))
 453
 454 (defun gnus-namazu/get-current-query ()
 455   (and (eq major-mode 'gnus-summary-mode)
 456        (gnus-ephemeral-group-p gnus-newsgroup-name)
 457        (string-match gnus-namazu/group-name-regexp gnus-newsgroup-name)
 458        (cadr (assq 'gnus-namazu-current-query
 459                    (gnus-info-method (gnus-get-info gnus-newsgroup-name))))))
 460
 461 (defvar gnus-namazu/read-query-original-buffer nil)
 462 (defvar gnus-namazu/read-query-prompt nil)
 463 (defvar gnus-namazu/read-query-history nil)
 464
 465 (defun gnus-namazu/get-current-subject ()
 466   (and gnus-namazu/read-query-original-buffer
 467        (bufferp gnus-namazu/read-query-original-buffer)
 468        (with-current-buffer gnus-namazu/read-query-original-buffer
 469          (when (eq major-mode 'gnus-summary-mode)
 470            (let ((s (gnus-summary-article-subject)))
 471              ;; Remove typically prefixes of mailing lists.
 472              (when (string-match
 473                     "^\\(\\[[^]]*[0-9]+\\]\\|([^)]*[0-9]+)\\)\\s-*" s)
 474                (setq s (substring s (match-end 0))))
 475              (when (string-match
 476                     "^\\(Re\\(\\^?\\([0-9]+\\|\\[[0-9]+\\]\\)\\)?:\\s-*\\)+" s)
 477                (setq s (substring s (match-end 0))))
 478              (when (string-match "\\s-*(\\(re\\|was\\)\\b" s)
 479                (setq s (substring s 0 (match-beginning 0))))
 480              s)))))
 481
 482 (defun gnus-namazu/get-current-from ()
 483   (and gnus-namazu/read-query-original-buffer
 484        (bufferp gnus-namazu/read-query-original-buffer)
 485        (with-current-buffer gnus-namazu/read-query-original-buffer
 486          (when (eq major-mode 'gnus-summary-mode)
 487            (cadr (mail-extract-address-components
 488                   (mail-header-from
 489                    (gnus-summary-article-header))))))))
 490
 491 (defun gnus-namazu/get-current-to ()
 492   (and gnus-namazu/read-query-original-buffer
 493        (bufferp gnus-namazu/read-query-original-buffer)
 494        (with-current-buffer gnus-namazu/read-query-original-buffer
 495          (when (eq major-mode 'gnus-summary-mode)
 496            (cadr (mail-extract-address-components
 497                   (cdr (assq 'To (mail-header-extra
 498                                   (gnus-summary-article-header))))))))))
 499
 500 (defmacro gnus-namazu/minibuffer-prompt-end ()
 501   (if (fboundp 'minibuffer-prompt-end)
 502       '(minibuffer-prompt-end)
 503     '(point-min)))
 504
 505 (defun gnus-namazu/message (string &rest arguments)
 506   (let* ((s1 (concat
 507               gnus-namazu/read-query-prompt
 508               (buffer-substring (gnus-namazu/minibuffer-prompt-end)
 509                                 (point-max))))
 510          (s2 (apply (function format) string arguments))
 511          (w (- (window-width)
 512                (string-width s1)
 513                (string-width s2)
 514                1)))
 515     (message (if (>= w 0)
 516                  (concat s1 (make-string w ?\ ) s2)
 517                s2))
 518     (if (sit-for 0.3) (message s1))
 519     s2))
 520
 521 (defun gnus-namazu/complete-query ()
 522   (interactive)
 523   (let ((pos (point)))
 524     (cond
 525      ((and (re-search-backward "\\+\\([-a-z]*\\)" nil t)
 526            (= pos (match-end 0)))
 527       (let* ((partial (match-string 1))
 528              (completions
 529               (all-completions
 530                partial
 531                (mapcar 'list gnus-namazu-field-keywords))))
 532         (cond
 533          ((null completions)
 534           (gnus-namazu/message "No completions of %s" partial))
 535          ((= 1 (length completions))
 536           (goto-char (match-beginning 1))
 537           (delete-region (match-beginning 1) (match-end 1))
 538           (insert (car completions) ":")
 539           (setq pos (point))
 540           (gnus-namazu/message "Completed"))
 541          (t
 542           (let ((x (try-completion partial (mapcar 'list completions))))
 543             (if (string= x partial)
 544                 (if (and (eq last-command
 545                              'gnus-namazu/field-keyword-completion)
 546                          completion-auto-help)
 547                     (with-output-to-temp-buffer "*Completions*"
 548                       (display-completion-list completions))
 549                   (gnus-namazu/message "Sole completion"))
 550               (goto-char (match-beginning 1))
 551               (delete-region (match-beginning 1) (match-end 1))
 552               (insert x)
 553               (setq pos (point))))))))
 554      ((and (looking-at "\\+subject:")
 555            (= pos (match-end 0)))
 556       (let ((s (gnus-namazu/get-current-subject)))
 557         (when s
 558           (goto-char pos)
 559           (insert "\"" s "\"")
 560           (setq pos (point)))))
 561      ((and (looking-at "\\+from:")
 562            (= pos (match-end 0)))
 563       (let ((f (gnus-namazu/get-current-from)))
 564         (when f
 565           (goto-char pos)
 566           (insert "\"" f "\"")
 567           (setq pos (point)))))
 568      ((and (looking-at "\\+to:")
 569            (= pos (match-end 0)))
 570       (let ((to (gnus-namazu/get-current-to)))
 571         (when to
 572           (goto-char pos)
 573           (insert "\"" to "\"")
 574           (setq pos (point))))))
 575     (goto-char pos)))
 576
 577 (defvar gnus-namazu/read-query-map
 578   (let ((keymap (copy-keymap minibuffer-local-map)))
 579     (define-key keymap "\t" 'gnus-namazu/complete-query)
 580     keymap))
 581
 582 (defun gnus-namazu/read-query (prompt &optional initial)
 583   (let ((gnus-namazu/read-query-original-buffer (current-buffer))
 584         (gnus-namazu/read-query-prompt prompt))
 585     (unless initial
 586       (when (setq initial (gnus-namazu/get-current-query))
 587         (setq initial (cons initial 0))))
 588     (read-from-minibuffer prompt initial gnus-namazu/read-query-map nil
 589                           'gnus-namazu/read-query-history)))
 590
 591 (defun gnus-namazu/highlight-words (query)
 592   (with-temp-buffer
 593     (insert " " query)
 594     ;; Remove tokens for NOT search
 595     (goto-char (point-min))
 596     (while (re-search-forward "[\e$B!!\e(B \t\r\f\n]+not[\e$B!!\e(B \t\r\f\n]+\
 597 \\([^\e$B!!\e(B \t\r\f\n\"{(/]+\\|\"[^\"]+\"\\|{[^}]+}\\|([^)]+)\\|/[^/]+/\\)+" nil t)
 598       (delete-region (match-beginning 0) (match-end 0)))
 599     ;; Remove tokens for Field search
 600     (goto-char (point-min))
 601     (while (re-search-forward "[\e$B!!\e(B \t\r\f\n]+\\+[^\e$B!!\e(B \t\r\f\n:]+:\
 602 \\([^\e$B!!\e(B \t\r\f\n\"{(/]+\\|\"[^\"]+\"\\|{[^}]+}\\|([^)]+)\\|/[^/]+/\\)+" nil t)
 603       (delete-region (match-beginning 0) (match-end 0)))
 604     ;; Remove tokens for Regexp search
 605     (goto-char (point-min))
 606     (while (re-search-forward "/[^/]+/" nil t)
 607       (delete-region (match-beginning 0) (match-end 0)))
 608     ;; Remove brackets, double quote, asterisk and operators
 609     (goto-char (point-min))
 610     (while (re-search-forward "\\([(){}\"*]\\|\\b\\(and\\|or\\)\\b\\)" nil t)
 611       (delete-region (match-beginning 0) (match-end 0)))
 612     ;; Collect all keywords
 613     (setq query nil)
 614     (goto-char (point-min))
 615     (while (re-search-forward "[^\e$B!!\e(B \t\r\f\n]+" nil t)
 616       (push (match-string 0) query))
 617     (when query
 618       (let (en ja)
 619         (dolist (q query)
 620           (if (string-match "\\cj" q)
 621               (push q ja)
 622             (push q en)))
 623         (append
 624          (when en
 625            (list (list (concat "\\b\\(" (regexp-opt en) "\\)\\b")
 626                        0 0 'gnus-namazu-query-highlight-face)))
 627          (when ja
 628            (list (list (regexp-opt ja)
 629                        0 0 'gnus-namazu-query-highlight-face))))))))
 630
 631 (defun gnus-namazu/truncate-article-list (articles)
 632   (let ((hit (length articles)))
 633     (when (and gnus-large-newsgroup
 634                (> hit gnus-large-newsgroup))
 635       (let* ((cursor-in-echo-area nil)
 636              (input (read-from-minibuffer
 637                      (format "\
 638 Too many articles were retrieved.  How many articles (max %d): "
 639                              hit)
 640                      (cons (number-to-string gnus-large-newsgroup) 0))))
 641         (unless (string-match "\\`[ \t]*\\'" input)
 642           (setcdr (nthcdr (min (1- (string-to-number input)) hit) articles)
 643                   nil)))))
 644   articles)
 645
 646 ;;;###autoload
 647 (defun gnus-namazu-search (groups query)
 648   "Search QUERY through GROUPS with Namazu,
 649 and make a virtual group contains its results."
 650   (interactive
 651    (list
 652     (gnus-namazu/get-target-groups)
 653     (gnus-namazu/read-query "Enter query: ")))
 654   (gnus-namazu/setup)
 655   (let ((articles (gnus-namazu/search groups query)))
 656     (if articles
 657         (let ((real-groups groups)
 658               (vgroup
 659                (apply (function format)
 660                       "nnvirtual:namazu-search?query=%s&groups=%s&id=%d%d%d"
 661                       query
 662                       (if groups (mapconcat 'identity groups ",") "ALL")
 663                       (current-time))))
 664           (gnus-namazu/truncate-article-list articles)
 665           (unless real-groups
 666             (dolist (a articles)
 667               (add-to-list 'real-groups (gnus-namazu/article-group a))))
 668           ;; Generate virtual group which includes all results.
 669           (when (fboundp 'gnus-group-decoded-name)
 670             (setq vgroup
 671                   (encode-coding-string vgroup gnus-namazu-coding-system)))
 672           (setq vgroup
 673                 (gnus-group-read-ephemeral-group
 674                  vgroup
 675                  `(nnvirtual ,vgroup
 676                              (nnvirtual-component-groups ,real-groups)
 677                              (gnus-namazu-target-groups ,groups)
 678                              (gnus-namazu-current-query ,query))
 679                  t (cons (current-buffer) (current-window-configuration)) t))
 680           (when gnus-namazu-query-highlight
 681             (gnus-group-set-parameter vgroup 'highlight-words
 682                                       (gnus-namazu/highlight-words query)))
 683           ;; Generate new summary buffer which contains search results.
 684           (gnus-group-read-group
 685            t t vgroup
 686            (sort (delq nil ;; Ad-hoc fix, to avoid wrong-type-argument error.
 687                        (mapcar
 688                         (lambda (a)
 689                           (nnvirtual-reverse-map-article
 690                            (gnus-namazu/article-group a)
 691                            (gnus-namazu/article-number a)))
 692                         articles))
 693                  '<)))
 694       (message "No entry."))))
 695
 696 (defmacro gnus-namazu/lock-file-name (&optional directory)
 697   `(expand-file-name "NMZ.lock2" ,directory))
 698
 699 (defmacro gnus-namazu/status-file-name (&optional directory)
 700   `(expand-file-name "NMZ.status" ,directory))
 701
 702 (defmacro gnus-namazu/index-file-name (&optional directory)
 703   `(expand-file-name "NMZ.i" ,directory))
 704
 705 (defun gnus-namazu/mknmz-cleanup (directory)
 706   (let ((lockfile (gnus-namazu/lock-file-name directory)))
 707     (when (file-exists-p lockfile)
 708       (delete-file lockfile)
 709       (dolist (tmpfile (directory-files directory t "\\`NMZ\\..*\\.tmp\\'" t))
 710         (delete-file tmpfile)))))
 711
 712 ;;;###autoload
 713 (defun gnus-namazu-create-index (directory &optional target-directories force)
 714   "Create index under DIRECTORY."
 715   (interactive
 716    (list
 717     (if (and current-prefix-arg (> (length gnus-namazu-index-directories) 1))
 718         (completing-read "Directory: "
 719                          (mapcar 'list gnus-namazu-index-directories) nil t)
 720       (gnus-namazu/default-index-directory))
 721     nil t))
 722   (setq directory (file-name-as-directory (expand-file-name directory)))
 723   (unless target-directories
 724     (setq target-directories
 725           (delq nil
 726                 (mapcar (lambda (dir)
 727                           (when (file-directory-p dir) dir))
 728                         (append
 729                          (mapcar 'gnus-namazu/server-directory
 730                                  (gnus-namazu/indexed-servers))
 731                          (list
 732                           (expand-file-name gnus-cache-directory)
 733                           (expand-file-name gnus-agent-directory)))))))
 734   (if (file-exists-p (gnus-namazu/lock-file-name directory))
 735       (when force
 736         (error "Found lock file: %s" (gnus-namazu/lock-file-name directory)))
 737     (with-current-buffer
 738         (get-buffer-create (concat " *mknmz*" directory))
 739       (erase-buffer)
 740       (unless (file-directory-p directory)
 741         (make-directory directory t))
 742       (setq default-directory directory)
 743       (let ((args (append gnus-namazu-make-index-arguments
 744                           target-directories)))
 745         (insert "% " gnus-namazu-make-index-command " "
 746                 (mapconcat 'identity args " ") "\n")
 747         (goto-char (point-max))
 748         (when force
 749           (pop-to-buffer (current-buffer)))
 750         (message "Make index at %s..." directory)
 751         (unwind-protect
 752             (apply 'call-process gnus-namazu-make-index-command nil t t args)
 753           (gnus-namazu/mknmz-cleanup directory))
 754         (message "Make index at %s...done" directory)
 755         (unless force
 756           (kill-buffer (current-buffer)))))
 757     (gnus-namazu/make-directory-table t)))
 758
 759 (defun gnus-namazu/lapse-seconds (start end)
 760   "Return lapse seconds from START to END.
 761 START and END are lists which represent time in Emacs-style."
 762   (+ (* (- (car end) (car start)) 65536)
 763      (cadr end)
 764      (- (cadr start))))
 765
 766 (defun gnus-namazu/index-old-p (directory)
 767   "Return non-nil value when the index under the DIRECTORY is older
 768 than the period that is set to `gnus-namazu-index-update-interval'"
 769   (let ((file (gnus-namazu/index-file-name directory)))
 770     (or (not (file-exists-p file))
 771         (and (integerp gnus-namazu-index-update-interval)
 772              (>= (gnus-namazu/lapse-seconds
 773                   (nth 5 (file-attributes file))
 774                   (current-time))
 775                  gnus-namazu-index-update-interval)))))
 776
 777 (defvar gnus-namazu/update-directories nil)
 778 (defvar gnus-namazu/update-process nil)
 779
 780 (defun gnus-namazu/update-p (directory &optional force)
 781   "Return the DIRECTORY when the index undef the DIRECTORY should be updated."
 782   (setq directory (file-name-as-directory (expand-file-name directory)))
 783   (labels ((error-message (format &rest args)
 784                           (apply (if force 'error 'message) format args)
 785                           nil))
 786     (if gnus-namazu/update-process
 787         (error-message "%s" "Can not run two update processes simultaneously")
 788       (and (or force
 789                (gnus-namazu/index-old-p directory))
 790            (let ((status-file (gnus-namazu/status-file-name directory)))
 791              (or (file-exists-p status-file)
 792                  (error-message "Can not find status file: %s" status-file)))
 793            (let ((lock-file (gnus-namazu/lock-file-name directory)))
 794              (or (not (file-exists-p lock-file))
 795                  (error-message "Found lock file: %s" lock-file)))
 796            directory))))
 797
 798 ;;;###autoload
 799 (defun gnus-namazu-update-index (directory &optional force)
 800   "Update the index under the DIRECTORY."
 801   (interactive
 802    (list
 803     (if (and current-prefix-arg (> (length gnus-namazu-index-directories) 1))
 804         (completing-read "Directory: "
 805                          (mapcar 'list gnus-namazu-index-directories) nil t)
 806       (gnus-namazu/default-index-directory))
 807     t))
 808   (when (setq directory (gnus-namazu/update-p directory force))
 809     (with-current-buffer (get-buffer-create (concat " *mknmz*" directory))
 810       (buffer-disable-undo)
 811       (erase-buffer)
 812       (unless (file-directory-p directory)
 813         (make-directory directory t))
 814       (setq default-directory directory)
 815       (let ((proc (start-process gnus-namazu-make-index-command
 816                                  (current-buffer)
 817                                  gnus-namazu-make-index-command
 818                                  (format "--update=%s" directory))))
 819         (if (processp proc)
 820             (prog1 (setq gnus-namazu/update-process proc)
 821               (process-kill-without-query proc)
 822               (set-process-sentinel proc 'gnus-namazu/update-sentinel)
 823               (add-hook 'kill-emacs-hook 'gnus-namazu-stop-update)
 824               (message "Update index at %s..." directory))
 825           (goto-char (point-min))
 826           (if (re-search-forward "^ERROR:.*$" nil t)
 827               (progn
 828                 (pop-to-buffer (current-buffer))
 829                 (funcall (if force 'error 'message)
 830                          "Update index at %s...%s" directory (match-string 0)))
 831             (kill-buffer (current-buffer))
 832             (funcall (if force 'error 'message)
 833                      "Can not start %s" gnus-namazu-make-index-command))
 834           nil)))))
 835
 836 ;;;###autoload
 837 (defun gnus-namazu-update-all-indices (&optional force)
 838   "Update all indices which is set to `gnus-namazu-index-directories'."
 839   (interactive (list t))
 840   (gnus-namazu-update-indices gnus-namazu-index-directories force))
 841
 842 (defun gnus-namazu-update-indices (&optional directories force)
 843   (when (setq directories
 844               (delq nil (mapcar (lambda (d)
 845                                   (gnus-namazu/update-p d force))
 846                                 directories)))
 847     (setq gnus-namazu/update-directories (cons force (cdr directories)))
 848     (gnus-namazu-update-index (car directories) force)))
 849
 850 (defun gnus-namazu/update-sentinel (process event)
 851   (let ((buffer (process-buffer process)))
 852     (when (buffer-name buffer)
 853       (with-current-buffer buffer
 854         (gnus-namazu/mknmz-cleanup default-directory)
 855         (goto-char (point-min))
 856         (cond
 857          ((re-search-forward "^ERROR:.*$" nil t)
 858           (pop-to-buffer (current-buffer))
 859           (message "Update index at %s...%s"
 860                    default-directory (match-string 0))
 861           (setq gnus-namazu/update-directories nil))
 862          ((and (eq 'exit (process-status process))
 863                (zerop (process-exit-status process)))
 864           (message "Update index at %s...done" default-directory)
 865           (unless (or debug-on-error debug-on-quit)
 866             (kill-buffer buffer)))))))
 867   (setq gnus-namazu/update-process nil)
 868   (unless (gnus-namazu-update-indices (cdr gnus-namazu/update-directories)
 869                                       (car gnus-namazu/update-directories))
 870     (gnus-namazu/make-directory-table t)))
 871
 872 ;;;###autoload
 873 (defun gnus-namazu-stop-update ()
 874   "Stop the running indexer of Namazu."
 875   (interactive)
 876   (setq gnus-namazu/update-directories nil)
 877   (and gnus-namazu/update-process
 878        (processp gnus-namazu/update-process)
 879        (kill-process gnus-namazu/update-process)))
 880
 881 (let (current-load-list)
 882   (defadvice gnus-offer-save-summaries
 883     (before gnus-namazu-kill-summary-buffers activate compile)
 884     "Advised by `gnus-namazu'.
 885 In order to avoid annoying questions, kill summary buffers which
 886 generated by `gnus-namazu' itself before `gnus-offer-save-summaries'
 887 is called."
 888     (let ((buffers (buffer-list)))
 889       (while buffers
 890         (when (with-current-buffer (car buffers)
 891                 (and (eq major-mode 'gnus-summary-mode)
 892                      (gnus-ephemeral-group-p gnus-newsgroup-name)
 893                      (string-match gnus-namazu/group-name-regexp
 894                                    gnus-newsgroup-name)))
 895           (kill-buffer (car buffers)))
 896         (setq buffers (cdr buffers))))))
 897
 898 ;;;###autoload
 899 (defun gnus-namazu-insinuate ()
 900   (add-hook
 901    'gnus-group-mode-hook
 902    (lambda ()
 903      (define-key gnus-group-mode-map "\C-c\C-n" 'gnus-namazu-search)))
 904   (add-hook
 905    'gnus-summary-mode-hook
 906    (lambda ()
 907      (define-key gnus-summary-mode-map "\C-c\C-n" 'gnus-namazu-search))))
 908
 909 (provide 'gnus-namazu)
 910
 911 ;; gnus-namazu.el ends here.