lisp/nnml.el

   1 ;;; nnml.el --- mail spool access for Gnus
   2 ;; Copyright (C) 1995,96 Free Software Foundation, Inc.
   3
   4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
   5 ;;      Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
   6 ;; Keywords: news, mail
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
  28 ;; For an overview of what the interface functions do, please see the
  29 ;; Gnus sources.
  30
  31 ;;; Code:
  32
  33 (require 'nnheader)
  34 (require 'nnmail)
  35 (require 'nnoo)
  36 (require 'cl)
  37
  38 (nnoo-declare nnml)
  39
  40 (defvoo nnml-directory message-directory
  41   "Mail spool directory.")
  42
  43 (defvoo nnml-active-file
  44   (concat (file-name-as-directory nnml-directory) "active")
  45   "Mail active file.")
  46
  47 (defvoo nnml-newsgroups-file
  48   (concat (file-name-as-directory nnml-directory) "newsgroups")
  49   "Mail newsgroups description file.")
  50
  51 (defvoo nnml-get-new-mail t
  52   "If non-nil, nnml will check the incoming mail file and split the mail.")
  53
  54 (defvoo nnml-nov-is-evil nil
  55   "If non-nil, Gnus will never generate and use nov databases for mail groups.
  56 Using nov databases will speed up header fetching considerably.
  57 This variable shouldn't be flipped much. If you have, for some reason,
  58 set this to t, and want to set it to nil again, you should always run
  59 the `nnml-generate-nov-databases' command. The function will go
  60 through all nnml directories and generate nov databases for them
  61 all. This may very well take some time.")
  62
  63 (defvoo nnml-prepare-save-mail-hook nil
  64   "Hook run narrowed to an article before saving.")
  65
  66 (defvoo nnml-inhibit-expiry nil
  67   "If non-nil, inhibit expiry.")
  68
  69
  70 \f
  71
  72 (defconst nnml-version "nnml 1.0"
  73   "nnml version.")
  74
  75 (defvoo nnml-nov-file-name ".overview")
  76
  77 (defvoo nnml-current-directory nil)
  78 (defvoo nnml-current-group nil)
  79 (defvoo nnml-status-string "")
  80 (defvoo nnml-nov-buffer-alist nil)
  81 (defvoo nnml-group-alist nil)
  82 (defvoo nnml-active-timestamp nil)
  83 (defvoo nnml-article-file-alist nil)
  84
  85 (defvoo nnml-generate-active-function 'nnml-generate-active-info)
  86
  87 \f
  88
  89 ;;; Interface functions.
  90
  91 (nnoo-define-basics nnml)
  92
  93 (deffoo nnml-retrieve-headers (sequence &optional newsgroup server fetch-old)
  94   (save-excursion
  95     (set-buffer nntp-server-buffer)
  96     (erase-buffer)
  97     (let ((file nil)
  98           (number (length sequence))
  99           (count 0)
 100           beg article)
 101       (if (stringp (car sequence))
 102           'headers
 103         (nnml-possibly-change-directory newsgroup server)
 104         (unless nnml-article-file-alist
 105           (setq nnml-article-file-alist
 106                 (nnheader-article-to-file-alist nnml-current-directory)))
 107         (if (nnml-retrieve-headers-with-nov sequence fetch-old)
 108             'nov
 109           (while sequence
 110             (setq article (car sequence))
 111             (setq file
 112                   (concat nnml-current-directory
 113                           (or (cdr (assq article nnml-article-file-alist))
 114                               "")))
 115             (if (and (file-exists-p file)
 116                      (not (file-directory-p file)))
 117                 (progn
 118                   (insert (format "221 %d Article retrieved.\n" article))
 119                   (setq beg (point))
 120                   (nnheader-insert-head file)
 121                   (goto-char beg)
 122                   (if (search-forward "\n\n" nil t)
 123                       (forward-char -1)
 124                     (goto-char (point-max))
 125                     (insert "\n\n"))
 126                   (insert ".\n")
 127                   (delete-region (point) (point-max))))
 128             (setq sequence (cdr sequence))
 129             (setq count (1+ count))
 130             (and (numberp nnmail-large-newsgroup)
 131                  (> number nnmail-large-newsgroup)
 132                  (zerop (% count 20))
 133                  (nnheader-message 6 "nnml: Receiving headers... %d%%"
 134                                    (/ (* count 100) number))))
 135
 136           (and (numberp nnmail-large-newsgroup)
 137                (> number nnmail-large-newsgroup)
 138                (nnheader-message 6 "nnml: Receiving headers...done"))
 139
 140           (nnheader-fold-continuation-lines)
 141           'headers)))))
 142
 143 (deffoo nnml-open-server (server &optional defs)
 144   (nnoo-change-server 'nnml server defs)
 145   (when (not (file-exists-p nnml-directory))
 146     (condition-case ()
 147         (make-directory nnml-directory t)
 148       (error t)))
 149   (cond
 150    ((not (file-exists-p nnml-directory))
 151     (nnml-close-server)
 152     (nnheader-report 'nnml "Couldn't create directory: %s" nnml-directory))
 153    ((not (file-directory-p (file-truename nnml-directory)))
 154     (nnml-close-server)
 155     (nnheader-report 'nnml "Not a directory: %s" nnml-directory))
 156    (t
 157     (nnheader-report 'nnml "Opened server %s using directory %s"
 158                      server nnml-directory)
 159     t)))
 160
 161 (deffoo nnml-request-article (id &optional newsgroup server buffer)
 162   (nnml-possibly-change-directory newsgroup server)
 163   (let* ((nntp-server-buffer (or buffer nntp-server-buffer))
 164          file path gpath group-num)
 165     (if (stringp id)
 166         (when (and (setq group-num (nnml-find-group-number id))
 167                    (setq file (cdr
 168                                (assq (cdr group-num)
 169                                      (nnheader-article-to-file-alist
 170                                       (setq gpath
 171                                             (nnmail-group-pathname
 172                                              (car group-num)
 173                                              nnml-directory)))))))
 174           (setq path (concat gpath (int-to-string (cdr group-num)))))
 175       (unless nnml-article-file-alist
 176         (setq nnml-article-file-alist
 177               (nnheader-article-to-file-alist nnml-current-directory)))
 178       (when (setq file (cdr (assq id nnml-article-file-alist)))
 179         (setq path (concat nnml-current-directory file))))
 180     (cond
 181      ((not path)
 182       (nnheader-report 'nnml "No such article: %s" id))
 183      ((not (file-exists-p path))
 184       (nnheader-report 'nnml "No such file: %s" path))
 185      ((file-directory-p path)
 186       (nnheader-report 'nnml "File is a directory: %s" path))
 187      ((not (save-excursion (nnmail-find-file path)))
 188       (nnheader-report 'nnml "Couldn't read file: %s" path))
 189      (t
 190       (nnheader-report 'nnml "Article %s retrieved" id)
 191       ;; We return the article number.
 192       (cons newsgroup (string-to-int (file-name-nondirectory path)))))))
 193
 194 (deffoo nnml-request-group (group &optional server dont-check)
 195   (cond
 196    ((not (nnml-possibly-change-directory group server))
 197     (nnheader-report 'nnml "Invalid group (no such directory)"))
 198    ((not (file-directory-p nnml-current-directory))
 199     (nnheader-report 'nnml "%s is not a directory" nnml-current-directory))
 200    (dont-check
 201     (nnheader-report 'nnml "Group %s selected" group)
 202     t)
 203    (t
 204     (nnmail-activate 'nnml)
 205     (let ((active (nth 1 (assoc group nnml-group-alist))))
 206       (if (not active)
 207           (nnheader-report 'nnml "No such group: %s" group)
 208         (nnheader-report 'nnml "Selected group %s" group)
 209         (nnheader-insert "211 %d %d %d %s\n"
 210                          (max (1+ (- (cdr active) (car active))) 0)
 211                          (car active) (cdr active) group))))))
 212
 213 (deffoo nnml-request-scan (&optional group server)
 214   (setq nnml-article-file-alist nil)
 215   (nnmail-get-new-mail 'nnml 'nnml-save-nov nnml-directory group))
 216
 217 (deffoo nnml-close-group (group &optional server)
 218   (setq nnml-article-file-alist nil)
 219   t)
 220
 221 (deffoo nnml-request-create-group (group &optional server)
 222   (nnmail-activate 'nnml)
 223   (or (assoc group nnml-group-alist)
 224       (let (active)
 225         (setq nnml-group-alist (cons (list group (setq active (cons 1 0)))
 226                                      nnml-group-alist))
 227         (nnml-possibly-create-directory group)
 228         (nnml-possibly-change-directory group server)
 229         (let ((articles
 230                (nnheader-directory-articles nnml-current-directory )))
 231           (and articles
 232                (progn
 233                  (setcar active (apply 'min articles))
 234                  (setcdr active (apply 'max articles)))))
 235         (nnmail-save-active nnml-group-alist nnml-active-file)))
 236   t)
 237
 238 (deffoo nnml-request-list (&optional server)
 239   (save-excursion
 240     (nnmail-find-file nnml-active-file)
 241     (setq nnml-group-alist (nnmail-get-active))))
 242
 243 (deffoo nnml-request-newgroups (date &optional server)
 244   (nnml-request-list server))
 245
 246 (deffoo nnml-request-list-newsgroups (&optional server)
 247   (save-excursion
 248     (nnmail-find-file nnml-newsgroups-file)))
 249
 250 (deffoo nnml-request-expire-articles (articles newsgroup &optional server force)
 251   (nnml-possibly-change-directory newsgroup server)
 252   (let* ((active-articles
 253           (nnheader-directory-articles nnml-current-directory))
 254          (is-old t)
 255          article rest mod-time number)
 256     (nnmail-activate 'nnml)
 257
 258     (unless nnml-article-file-alist
 259       (setq nnml-article-file-alist
 260             (nnheader-article-to-file-alist nnml-current-directory)))
 261
 262     (while (and articles is-old)
 263       (setq article (concat nnml-current-directory
 264                             (int-to-string
 265                              (setq number (pop articles)))))
 266       (when (setq mod-time (nth 5 (file-attributes article)))
 267         (if (and (nnml-deletable-article-p newsgroup number)
 268                  (setq is-old
 269                        (nnmail-expired-article-p newsgroup mod-time force
 270                                                  nnml-inhibit-expiry)))
 271             (progn
 272               (nnheader-message 5 "Deleting article %s in %s..."
 273                                 article newsgroup)
 274               (condition-case ()
 275                   (funcall nnmail-delete-file-function article)
 276                 (file-error
 277                  (push number rest)))
 278               (setq active-articles (delq number active-articles))
 279               (nnml-nov-delete-article newsgroup number))
 280           (push number rest))))
 281     (let ((active (nth 1 (assoc newsgroup nnml-group-alist))))
 282       (when active
 283         (setcar active (or (and active-articles
 284                                 (apply 'min active-articles))
 285                            (1+ (cdr active)))))
 286       (nnmail-save-active nnml-group-alist nnml-active-file))
 287     (nnml-save-nov)
 288     (message "")
 289     (nconc rest articles)))
 290
 291 (deffoo nnml-request-move-article
 292   (article group server accept-form &optional last)
 293   (let ((buf (get-buffer-create " *nnml move*"))
 294         result)
 295     (nnml-possibly-change-directory group server)
 296     (unless nnml-article-file-alist
 297       (setq nnml-article-file-alist
 298             (nnheader-article-to-file-alist nnml-current-directory)))
 299     (and
 300      (nnml-deletable-article-p group article)
 301      (nnml-request-article article group server)
 302      (save-excursion
 303        (set-buffer buf)
 304        (insert-buffer-substring nntp-server-buffer)
 305        (setq result (eval accept-form))
 306        (kill-buffer (current-buffer))
 307        result)
 308      (progn
 309        (nnml-possibly-change-directory group server)
 310        (condition-case ()
 311            (funcall nnmail-delete-file-function
 312                     (concat nnml-current-directory
 313                             (int-to-string article)))
 314          (file-error nil))
 315        (nnml-nov-delete-article group article)
 316        (and last (nnml-save-nov))))
 317     result))
 318
 319 (deffoo nnml-request-accept-article (group &optional server last)
 320   (nnml-possibly-change-directory group server)
 321   (nnmail-check-syntax)
 322   (let (result)
 323     (if (stringp group)
 324         (and
 325          (nnmail-activate 'nnml)
 326          ;; We trick the choosing function into believing that only one
 327          ;; group is available.
 328          (let ((nnmail-split-methods (list (list group ""))))
 329            (setq result (car (nnml-save-mail))))
 330          (progn
 331            (nnmail-save-active nnml-group-alist nnml-active-file)
 332            (and last (nnml-save-nov))))
 333       (and
 334        (nnmail-activate 'nnml)
 335        (setq result (car (nnml-save-mail)))
 336        (progn
 337          (nnmail-save-active nnml-group-alist nnml-active-file)
 338          (and last (nnml-save-nov)))))
 339     result))
 340
 341 (deffoo nnml-request-replace-article (article group buffer)
 342   (nnml-possibly-change-directory group)
 343   (save-excursion
 344     (set-buffer buffer)
 345     (nnml-possibly-create-directory group)
 346     (let ((chars (nnmail-insert-lines))
 347           (art (concat (int-to-string article) "\t"))
 348           headers)
 349       (when (condition-case ()
 350                 (progn
 351                   (write-region
 352                    (point-min) (point-max)
 353                    (concat nnml-current-directory (int-to-string article))
 354                    nil (if (nnheader-be-verbose 5) nil 'nomesg))
 355                   t)
 356               (error nil))
 357         (setq headers (nnml-parse-head chars article))
 358         ;; Replace the NOV line in the NOV file.
 359         (save-excursion
 360           (set-buffer (nnml-open-nov group))
 361           (goto-char (point-min))
 362           (if (or (looking-at art)
 363                   (search-forward (concat "\n" art) nil t))
 364               ;; Delete the old NOV line.
 365               (delete-region (progn (beginning-of-line) (point))
 366                              (progn (forward-line 1) (point)))
 367             ;; The line isn't here, so we have to find out where
 368             ;; we should insert it. (This situation should never
 369             ;; occur, but one likes to make sure...)
 370             (while (and (looking-at "[0-9]+\t")
 371                         (< (string-to-int
 372                             (buffer-substring
 373                              (match-beginning 0) (match-end 0)))
 374                            article)
 375                         (zerop (forward-line 1)))))
 376           (beginning-of-line)
 377           (nnheader-insert-nov headers)
 378           (nnml-save-nov)
 379           t)))))
 380
 381 (deffoo nnml-request-delete-group (group &optional force server)
 382   (nnml-possibly-change-directory group server)
 383   (when force
 384     ;; Delete all articles in GROUP.
 385     (let ((articles
 386            (directory-files
 387             nnml-current-directory t
 388             (concat nnheader-numerical-short-files
 389                     "\\|" (regexp-quote nnml-nov-file-name) "$")))
 390           article)
 391       (while articles
 392         (setq article (pop articles))
 393         (when (file-writable-p article)
 394           (nnheader-message 5 "Deleting article %s in %s..." article group)
 395           (funcall nnmail-delete-file-function article))))
 396     ;; Try to delete the directory itself.
 397     (condition-case ()
 398         (delete-directory nnml-current-directory)
 399       (error nil)))
 400   ;; Remove the group from all structures.
 401   (setq nnml-group-alist
 402         (delq (assoc group nnml-group-alist) nnml-group-alist)
 403         nnml-current-group nil
 404         nnml-current-directory nil)
 405   ;; Save the active file.
 406   (nnmail-save-active nnml-group-alist nnml-active-file)
 407   t)
 408
 409 (deffoo nnml-request-rename-group (group new-name &optional server)
 410   (nnml-possibly-change-directory group server)
 411   ;; Rename directory.
 412   (and (file-writable-p nnml-current-directory)
 413        (condition-case ()
 414            (let ((parent
 415                   (file-name-directory
 416                    (directory-file-name
 417                     (nnmail-group-pathname new-name nnml-directory)))))
 418              (unless (file-exists-p parent)
 419                (make-directory parent t))
 420              (rename-file
 421               (directory-file-name nnml-current-directory)
 422               (directory-file-name
 423                (nnmail-group-pathname new-name nnml-directory)))
 424              t)
 425          (error nil))
 426        ;; That went ok, so we change the internal structures.
 427        (let ((entry (assoc group nnml-group-alist)))
 428          (and entry (setcar entry new-name))
 429          (setq nnml-current-directory nil
 430                nnml-current-group nil)
 431          ;; Save the new group alist.
 432          (nnmail-save-active nnml-group-alist nnml-active-file)
 433          t)))
 434
 435 \f
 436 ;;; Internal functions.
 437
 438 (defun nnml-deletable-article-p (group article)
 439   "Say whether ARTICLE in GROUP can be deleted."
 440   (let (file path)
 441     (when (setq file (cdr (assq article nnml-article-file-alist)))
 442       (setq path (concat nnml-current-directory file))
 443       (and (file-writable-p path)
 444            (or (not nnmail-keep-last-article)
 445                (not (eq (cdr (nth 1 (assoc group nnml-group-alist)))
 446                         article)))))))
 447
 448 ;; Find an article number in the current group given the Message-ID.
 449 (defun nnml-find-group-number (id)
 450   (save-excursion
 451     (set-buffer (get-buffer-create " *nnml id*"))
 452     (buffer-disable-undo (current-buffer))
 453     (let ((alist nnml-group-alist)
 454           number)
 455       ;; We want to look through all .overview files, but we want to
 456       ;; start with the one in the current directory.  It seems most
 457       ;; likely that the article we are looking for is in that group.
 458       (if (setq number (nnml-find-id nnml-current-group id))
 459           (cons nnml-current-group number)
 460         ;; It wasn't there, so we look through the other groups as well.
 461         (while (and (not number)
 462                     alist)
 463           (or (string= (caar alist) nnml-current-group)
 464               (setq number (nnml-find-id (caar alist) id)))
 465           (or number
 466               (setq alist (cdr alist))))
 467         (and number
 468              (cons (caar alist) number))))))
 469
 470 (defun nnml-find-id (group id)
 471   (erase-buffer)
 472   (let ((nov (concat (nnmail-group-pathname group nnml-directory)
 473                      nnml-nov-file-name))
 474         number found)
 475     (when (file-exists-p nov)
 476       (insert-file-contents nov)
 477       (while (and (not found)
 478                   (search-forward id nil t)) ; We find the ID.
 479         ;; And the id is in the fourth field.
 480         (if (search-backward
 481              "\t" (save-excursion (beginning-of-line) (point)) t 4)
 482             (progn
 483               (beginning-of-line)
 484               (setq found t)
 485               ;; We return the article number.
 486               (setq number
 487                     (condition-case ()
 488                         (read (current-buffer))
 489                       (error nil))))))
 490       number)))
 491
 492 (defun nnml-retrieve-headers-with-nov (articles &optional fetch-old)
 493   (if (or gnus-nov-is-evil nnml-nov-is-evil)
 494       nil
 495     (let ((first (car articles))
 496           (last (progn (while (cdr articles) (setq articles (cdr articles)))
 497                        (car articles)))
 498           (nov (concat nnml-current-directory nnml-nov-file-name)))
 499       (when (file-exists-p nov)
 500         (save-excursion
 501           (set-buffer nntp-server-buffer)
 502           (erase-buffer)
 503           (insert-file-contents nov)
 504           (if (and fetch-old
 505                    (not (numberp fetch-old)))
 506               t                         ; Don't remove anything.
 507             (if fetch-old
 508                 (setq first (max 1 (- first fetch-old))))
 509             (goto-char (point-min))
 510             (while (and (not (eobp)) (> first (read (current-buffer))))
 511               (forward-line 1))
 512             (beginning-of-line)
 513             (if (not (eobp)) (delete-region 1 (point)))
 514             (while (and (not (eobp)) (>= last (read (current-buffer))))
 515               (forward-line 1))
 516             (beginning-of-line)
 517             (if (not (eobp)) (delete-region (point) (point-max)))
 518             t))))))
 519
 520 (defun nnml-possibly-change-directory (group &optional server)
 521   (when (and server
 522              (not (nnml-server-opened server)))
 523     (nnml-open-server server))
 524   (when group
 525     (let ((pathname (nnmail-group-pathname group nnml-directory)))
 526       (when (not (equal pathname nnml-current-directory))
 527         (setq nnml-current-directory pathname
 528               nnml-current-group group
 529               nnml-article-file-alist nil))))
 530   t)
 531
 532 (defun nnml-possibly-create-directory (group)
 533   (let (dir dirs)
 534     (setq dir (nnmail-group-pathname group nnml-directory))
 535     (while (not (file-directory-p dir))
 536       (setq dirs (cons dir dirs))
 537       (setq dir (file-name-directory (directory-file-name dir))))
 538     (while dirs
 539       (make-directory (directory-file-name (car dirs)))
 540       (nnheader-message 5 "Creating mail directory %s" (car dirs))
 541       (setq dirs (cdr dirs)))))
 542
 543 (defun nnml-save-mail ()
 544   "Called narrowed to an article."
 545   (let ((group-art (nreverse (nnmail-article-group 'nnml-active-number)))
 546         chars headers)
 547     (setq chars (nnmail-insert-lines))
 548     (nnmail-insert-xref group-art)
 549     (run-hooks 'nnmail-prepare-save-mail-hook)
 550     (run-hooks 'nnml-prepare-save-mail-hook)
 551     (goto-char (point-min))
 552     (while (looking-at "From ")
 553       (replace-match "X-From-Line: ")
 554       (forward-line 1))
 555     ;; We save the article in all the newsgroups it belongs in.
 556     (let ((ga group-art)
 557           first)
 558       (while ga
 559         (nnml-possibly-create-directory (caar ga))
 560         (let ((file (concat (nnmail-group-pathname
 561                              (caar ga) nnml-directory)
 562                             (int-to-string (cdar ga)))))
 563           (if first
 564               ;; It was already saved, so we just make a hard link.
 565               (funcall nnmail-crosspost-link-function first file t)
 566             ;; Save the article.
 567             (write-region (point-min) (point-max) file nil
 568                           (if (nnheader-be-verbose 5) nil 'nomesg))
 569             (setq first file)))
 570         (setq ga (cdr ga))))
 571     ;; Generate a nov line for this article. We generate the nov
 572     ;; line after saving, because nov generation destroys the
 573     ;; header.
 574     (setq headers (nnml-parse-head chars))
 575     ;; Output the nov line to all nov databases that should have it.
 576     (let ((ga group-art))
 577       (while ga
 578         (nnml-add-nov (caar ga) (cdar ga) headers)
 579         (setq ga (cdr ga))))
 580     group-art))
 581
 582 (defun nnml-active-number (group)
 583   "Compute the next article number in GROUP."
 584   (let ((active (cadr (assoc group nnml-group-alist))))
 585     ;; The group wasn't known to nnml, so we just create an active
 586     ;; entry for it.
 587     (unless active
 588       ;; Perhaps the active file was corrupt?  See whether
 589       ;; there are any articles in this group.
 590       (nnml-possibly-create-directory group)
 591       (nnml-possibly-change-directory group)
 592       (unless nnml-article-file-alist
 593         (setq nnml-article-file-alist
 594               (sort
 595                (nnheader-article-to-file-alist nnml-current-directory)
 596                (lambda (a1 a2) (< (car a1) (car a2))))))
 597       (setq active
 598             (if nnml-article-file-alist
 599                 (cons (caar nnml-article-file-alist)
 600                       (caar (last nnml-article-file-alist)))
 601               (cons 1 0)))
 602       (setq nnml-group-alist (cons (list group active) nnml-group-alist)))
 603     (setcdr active (1+ (cdr active)))
 604     (while (file-exists-p
 605             (concat (nnmail-group-pathname group nnml-directory)
 606                     (int-to-string (cdr active))))
 607       (setcdr active (1+ (cdr active))))
 608     (cdr active)))
 609
 610 (defun nnml-add-nov (group article headers)
 611   "Add a nov line for the GROUP base."
 612   (save-excursion
 613     (set-buffer (nnml-open-nov group))
 614     (goto-char (point-max))
 615     (mail-header-set-number headers article)
 616     (nnheader-insert-nov headers)))
 617
 618 (defsubst nnml-header-value ()
 619   (buffer-substring (match-end 0) (progn (end-of-line) (point))))
 620
 621 (defun nnml-parse-head (chars &optional number)
 622   "Parse the head of the current buffer."
 623   (save-excursion
 624     (save-restriction
 625       (goto-char (point-min))
 626       (narrow-to-region
 627        (point)
 628        (1- (or (search-forward "\n\n" nil t) (point-max))))
 629       ;; Fold continuation lines.
 630       (goto-char (point-min))
 631       (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
 632         (replace-match " " t t))
 633       ;; Remove any tabs; they are too confusing.
 634       (subst-char-in-region (point-min) (point-max) ?\t ? )
 635       (let ((headers (nnheader-parse-head t)))
 636         (mail-header-set-chars headers chars)
 637         (mail-header-set-number headers number)
 638         headers))))
 639
 640 (defun nnml-open-nov (group)
 641   (or (cdr (assoc group nnml-nov-buffer-alist))
 642       (let ((buffer (find-file-noselect
 643                      (concat (nnmail-group-pathname group nnml-directory)
 644                              nnml-nov-file-name))))
 645         (save-excursion
 646           (set-buffer buffer)
 647           (buffer-disable-undo (current-buffer)))
 648         (setq nnml-nov-buffer-alist
 649               (cons (cons group buffer) nnml-nov-buffer-alist))
 650         buffer)))
 651
 652 (defun nnml-save-nov ()
 653   (save-excursion
 654     (while nnml-nov-buffer-alist
 655       (when (buffer-name (cdar nnml-nov-buffer-alist))
 656         (set-buffer (cdar nnml-nov-buffer-alist))
 657         (and (buffer-modified-p)
 658              (write-region
 659               1 (point-max) (buffer-file-name) nil 'nomesg))
 660         (set-buffer-modified-p nil)
 661         (kill-buffer (current-buffer)))
 662       (setq nnml-nov-buffer-alist (cdr nnml-nov-buffer-alist)))))
 663
 664 ;;;###autoload
 665 (defun nnml-generate-nov-databases ()
 666   "Generate nov databases in all nnml directories."
 667   (interactive)
 668   ;; Read the active file to make sure we don't re-use articles
 669   ;; numbers in empty groups.
 670   (nnmail-activate 'nnml)
 671   (nnml-open-server (or (nnoo-current-server 'nnml) ""))
 672   (setq nnml-directory (expand-file-name nnml-directory))
 673   ;; Recurse down the directories.
 674   (nnml-generate-nov-databases-1 nnml-directory)
 675   ;; Save the active file.
 676   (nnmail-save-active nnml-group-alist nnml-active-file))
 677
 678 (defun nnml-generate-nov-databases-1 (dir)
 679   (setq dir (file-name-as-directory dir))
 680   ;; We descend recursively
 681   (let ((dirs (directory-files dir t nil t))
 682         dir)
 683     (while dirs
 684       (setq dir (pop dirs))
 685       (when (and (not (member (file-name-nondirectory dir) '("." "..")))
 686                  (file-directory-p dir))
 687         (nnml-generate-nov-databases-1 dir))))
 688   ;; Do this directory.
 689   (let ((files (sort
 690                 (mapcar
 691                  (lambda (name) (string-to-int name))
 692                  (directory-files dir nil "^[0-9]+$" t))
 693                 '<)))
 694     (when files
 695       (funcall nnml-generate-active-function dir)
 696       ;; Generate the nov file.
 697       (nnml-generate-nov-file dir files))))
 698
 699 (defvar files)
 700 (defun nnml-generate-active-info (dir)
 701   ;; Update the active info for this group.
 702   (let ((group (nnheader-file-to-group
 703                 (directory-file-name dir) nnml-directory)))
 704     (setq nnml-group-alist
 705           (delq (assoc group nnml-group-alist) nnml-group-alist))
 706     (push (list group
 707                 (cons (car files)
 708                       (let ((f files))
 709                         (while (cdr f) (setq f (cdr f)))
 710                         (car f))))
 711           nnml-group-alist)))
 712
 713 (defun nnml-generate-nov-file (dir files)
 714   (let* ((dir (file-name-as-directory dir))
 715          (nov (concat dir nnml-nov-file-name))
 716          (nov-buffer (get-buffer-create " *nov*"))
 717          nov-line chars file headers)
 718     (save-excursion
 719       ;; Init the nov buffer.
 720       (set-buffer nov-buffer)
 721       (buffer-disable-undo (current-buffer))
 722       (erase-buffer)
 723       (set-buffer nntp-server-buffer)
 724       ;; Delete the old NOV file.
 725       (when (file-exists-p nov)
 726         (funcall nnmail-delete-file-function nov))
 727       (while files
 728         (unless (file-directory-p
 729                  (setq file (concat dir (int-to-string (car files)))))
 730           (erase-buffer)
 731           (insert-file-contents file)
 732           (narrow-to-region
 733            (goto-char (point-min))
 734            (progn
 735              (search-forward "\n\n" nil t)
 736              (setq chars (- (point-max) (point)))
 737              (max 1 (1- (point)))))
 738           (when (and (not (= 0 chars))  ; none of them empty files...
 739                      (not (= (point-min) (point-max))))
 740             (goto-char (point-min))
 741             (setq headers (nnml-parse-head chars (car files)))
 742             (save-excursion
 743               (set-buffer nov-buffer)
 744               (goto-char (point-max))
 745               (nnheader-insert-nov headers)))
 746           (widen))
 747         (setq files (cdr files)))
 748       (save-excursion
 749         (set-buffer nov-buffer)
 750         (write-region 1 (point-max) (expand-file-name nov) nil
 751                       'nomesg)
 752         (kill-buffer (current-buffer))))))
 753
 754 (defun nnml-nov-delete-article (group article)
 755   (save-excursion
 756     (set-buffer (nnml-open-nov group))
 757     (goto-char (point-min))
 758     (if (re-search-forward (concat "^" (int-to-string article) "\t") nil t)
 759         (delete-region (match-beginning 0) (progn (forward-line 1) (point))))
 760     t))
 761
 762 (provide 'nnml)
 763
 764 ;;; nnml.el ends here