lisp/gnus/nnmaildir.el

   1 ;;; nnmaildir.el --- maildir backend for Gnus
   2 ;; Public domain.
   3
   4 ;; Author: Paul Jarc <prj@po.cwru.edu>
   5
   6 ;; This file is part of GNU Emacs.
   7
   8 ;; GNU Emacs is free software; you can redistribute it and/or modify
   9 ;; it under the terms of the GNU General Public License as published by
  10 ;; the Free Software Foundation; either version 2, or (at your option)
  11 ;; any later version.
  12
  13 ;; GNU Emacs is distributed in the hope that it will be useful,
  14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 ;; GNU General Public License for more details.
  17
  18 ;; You should have received a copy of the GNU General Public License
  19 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21 ;; Boston, MA 02111-1307, USA.
  22
  23 ;;; Commentary:
  24
  25 ;; Maildir format is documented at <URL:http://cr.yp.to/proto/maildir.html>
  26 ;; and in the maildir(5) man page from qmail (available at
  27 ;; <URL:http://www.qmail.org/man/man5/maildir.html>).  nnmaildir also stores
  28 ;; extra information in the .nnmaildir/ directory within a maildir.
  29 ;;
  30 ;; Some goals of nnmaildir:
  31 ;; * Everything Just Works, and correctly.  E.g., NOV data is automatically
  32 ;;   regenerated when stale; no need for manually running
  33 ;;   *-generate-nov-databases.
  34 ;; * Perfect reliability: [C-g] will never corrupt its data in memory, and
  35 ;;   SIGKILL will never corrupt its data in the filesystem.
  36 ;; * Allow concurrent operation as much as possible.  If files change out
  37 ;;   from under us, adapt to the changes or degrade gracefully.
  38 ;; * We use the filesystem as a database, so that, e.g., it's easy to
  39 ;;   manipulate marks from outside Gnus.
  40 ;; * All information about a group is stored in the maildir, for easy backup,
  41 ;;   copying, restoring, etc.
  42 ;;
  43 ;; Todo:
  44 ;; * Add a hook for when moving messages from new/ to cur/, to support
  45 ;;   nnmail's duplicate detection.
  46 ;; * Improve generated Xrefs, so crossposts are detectable.
  47 ;; * Improve code readability.
  48
  49 ;;; Code:
  50
  51 ;; eval this before editing
  52 [(progn
  53    (put 'nnmaildir--with-nntp-buffer 'lisp-indent-function 0)
  54    (put 'nnmaildir--with-work-buffer 'lisp-indent-function 0)
  55    (put 'nnmaildir--with-nov-buffer  'lisp-indent-function 0)
  56    (put 'nnmaildir--with-move-buffer 'lisp-indent-function 0)
  57    )
  58 ]
  59
  60 (eval-and-compile
  61   (require 'nnheader)
  62   (require 'gnus)
  63   (require 'gnus-util)
  64   (require 'gnus-range)
  65   (require 'gnus-start)
  66   (require 'gnus-int)
  67   (require 'message))
  68 (eval-when-compile
  69   (require 'cl)
  70   (require 'nnmail))
  71
  72 (defconst nnmaildir-version "Gnus")
  73
  74 (defvar nnmaildir-article-file-name nil
  75   "*The filename of the most recently requested article.  This variable is set
  76 by nnmaildir-request-article.")
  77
  78 ;; The filename of the article being moved/copied:
  79 (defvar nnmaildir--file nil)
  80
  81 ;; Variables to generate filenames of messages being delivered:
  82 (defvar   nnmaildir--delivery-time "")
  83 (defconst nnmaildir--delivery-pid (concat "P" (number-to-string (emacs-pid))))
  84 (defvar   nnmaildir--delivery-count nil)
  85
  86 ;; An obarry containing symbols whose names are server names and whose values
  87 ;; are servers:
  88 (defvar nnmaildir--servers (make-vector 3 0))
  89 ;; The current server:
  90 (defvar nnmaildir--cur-server nil)
  91
  92 ;; A copy of nnmail-extra-headers
  93 (defvar nnmaildir--extra nil)
  94
  95 ;; A NOV structure looks like this (must be prin1-able, so no defstruct):
  96 ["subject\tfrom\tdate"
  97  "references\tchars\lines"
  98  "To: you\tIn-Reply-To: <your.mess@ge>"
  99  (12345 67890)     ;; modtime of the corresponding article file
 100  (to in-reply-to)] ;; contemporary value of nnmail-extra-headers
 101 (defconst nnmaildir--novlen 5)
 102 (defmacro nnmaildir--nov-new (beg mid end mtime extra)
 103   `(vector ,beg ,mid ,end ,mtime ,extra))
 104 (defmacro nnmaildir--nov-get-beg   (nov) `(aref ,nov 0))
 105 (defmacro nnmaildir--nov-get-mid   (nov) `(aref ,nov 1))
 106 (defmacro nnmaildir--nov-get-end   (nov) `(aref ,nov 2))
 107 (defmacro nnmaildir--nov-get-mtime (nov) `(aref ,nov 3))
 108 (defmacro nnmaildir--nov-get-extra (nov) `(aref ,nov 4))
 109 (defmacro nnmaildir--nov-set-beg   (nov value) `(aset ,nov 0 ,value))
 110 (defmacro nnmaildir--nov-set-mid   (nov value) `(aset ,nov 1 ,value))
 111 (defmacro nnmaildir--nov-set-end   (nov value) `(aset ,nov 2 ,value))
 112 (defmacro nnmaildir--nov-set-mtime (nov value) `(aset ,nov 3 ,value))
 113 (defmacro nnmaildir--nov-set-extra (nov value) `(aset ,nov 4 ,value))
 114
 115 (defstruct nnmaildir--art
 116   (prefix nil :type string)  ;; "time.pid.host"
 117   (suffix nil :type string)  ;; ":2,flags"
 118   (num    nil :type natnum)  ;; article number
 119   (msgid  nil :type string)  ;; "<mess.age@id>"
 120   (nov    nil :type vector)) ;; cached nov structure, or nil
 121
 122 (defstruct nnmaildir--grp
 123   (name  nil :type string)  ;; "group.name"
 124   (new   nil :type list)    ;; new/ modtime
 125   (cur   nil :type list)    ;; cur/ modtime
 126   (min   1   :type natnum)  ;; minimum article number
 127   (count 0   :type natnum)  ;; count of articles
 128   (nlist nil :type list)    ;; list of articles, ordered descending by number
 129   (flist nil :type vector)  ;; obarray mapping filename prefix->article
 130   (mlist nil :type vector)  ;; obarray mapping message-id->article
 131   (cache nil :type vector)  ;; nov cache
 132   (index nil :type natnum)  ;; index of next cache entry to replace
 133   (mmth  nil :type vector)) ;; obarray mapping mark name->dir modtime
 134                                         ; ("Mark Mod Time Hash")
 135
 136 (defstruct nnmaildir--srv
 137   (address       nil :type string)         ;; server address string
 138   (method        nil :type list)           ;; (nnmaildir "address" ...)
 139   (prefix        nil :type string)         ;; "nnmaildir+address:"
 140   (dir           nil :type string)         ;; "/expanded/path/to/server/dir/"
 141   (ls            nil :type function)       ;; directory-files function
 142   (groups        nil :type vector)         ;; obarray mapping group name->group
 143   (curgrp        nil :type nnmaildir--grp) ;; current group, or nil
 144   (error         nil :type string)         ;; last error message, or nil
 145   (mtime         nil :type list)           ;; modtime of dir
 146   (gnm           nil)                      ;; flag: split from mail-sources?
 147   (target-prefix nil :type string))        ;; symlink target prefix
 148
 149 (defun nnmaildir--expired-article (group article)
 150   (setf (nnmaildir--art-nov article) nil)
 151   (let ((flist  (nnmaildir--grp-flist group))
 152         (mlist  (nnmaildir--grp-mlist group))
 153         (min    (nnmaildir--grp-min   group))
 154         (count  (1- (nnmaildir--grp-count group)))
 155         (prefix (nnmaildir--art-prefix article))
 156         (msgid  (nnmaildir--art-msgid  article))
 157         (new-nlist nil)
 158         (nlist-pre '(nil . nil))
 159         nlist-post num)
 160     (unless (zerop count)
 161       (setq nlist-post (nnmaildir--grp-nlist group)
 162             num (nnmaildir--art-num article))
 163       (if (eq num (caar nlist-post))
 164           (setq new-nlist (cdr nlist-post))
 165         (setq new-nlist nlist-post
 166               nlist-pre nlist-post
 167               nlist-post (cdr nlist-post))
 168         (while (/= num (caar nlist-post))
 169           (setq nlist-pre nlist-post
 170                 nlist-post (cdr nlist-post)))
 171         (setq nlist-post (cdr nlist-post))
 172         (if (eq num min)
 173             (setq min (caar nlist-pre)))))
 174     (let ((inhibit-quit t))
 175       (setf (nnmaildir--grp-min   group) min)
 176       (setf (nnmaildir--grp-count group) count)
 177       (setf (nnmaildir--grp-nlist group) new-nlist)
 178       (setcdr nlist-pre nlist-post)
 179       (unintern prefix flist)
 180       (unintern msgid mlist))))
 181
 182 (defun nnmaildir--nlist-art (group num)
 183   (let ((entry (assq num (nnmaildir--grp-nlist group))))
 184     (if entry
 185         (cdr entry))))
 186 (defmacro nnmaildir--flist-art (list file)
 187   `(symbol-value (intern-soft ,file ,list)))
 188 (defmacro nnmaildir--mlist-art (list msgid)
 189   `(symbol-value (intern-soft ,msgid ,list)))
 190
 191 (defun nnmaildir--pgname (server gname)
 192   (let ((prefix (nnmaildir--srv-prefix server)))
 193     (if prefix (concat prefix gname)
 194       (setq gname (gnus-group-prefixed-name gname
 195                                             (nnmaildir--srv-method server)))
 196       (setf (nnmaildir--srv-prefix server) (gnus-group-real-prefix gname))
 197       gname)))
 198
 199 (defun nnmaildir--param (pgname param)
 200   (setq param (gnus-group-find-parameter pgname param 'allow-list))
 201   (if (vectorp param) (setq param (aref param 0)))
 202   (eval param))
 203
 204 (defmacro nnmaildir--with-nntp-buffer (&rest body)
 205   `(save-excursion
 206      (set-buffer nntp-server-buffer)
 207      ,@body))
 208 (defmacro nnmaildir--with-work-buffer (&rest body)
 209   `(save-excursion
 210      (set-buffer (get-buffer-create " *nnmaildir work*"))
 211      ,@body))
 212 (defmacro nnmaildir--with-nov-buffer (&rest body)
 213   `(save-excursion
 214      (set-buffer (get-buffer-create " *nnmaildir nov*"))
 215      ,@body))
 216 (defmacro nnmaildir--with-move-buffer (&rest body)
 217   `(save-excursion
 218      (set-buffer (get-buffer-create " *nnmaildir move*"))
 219      ,@body))
 220
 221 (defmacro nnmaildir--subdir (dir subdir)
 222   `(file-name-as-directory (concat ,dir ,subdir)))
 223 (defmacro nnmaildir--srvgrp-dir (srv-dir gname)
 224   `(nnmaildir--subdir ,srv-dir ,gname))
 225 (defmacro nnmaildir--tmp       (dir) `(nnmaildir--subdir ,dir "tmp"))
 226 (defmacro nnmaildir--new       (dir) `(nnmaildir--subdir ,dir "new"))
 227 (defmacro nnmaildir--cur       (dir) `(nnmaildir--subdir ,dir "cur"))
 228 (defmacro nnmaildir--nndir     (dir) `(nnmaildir--subdir ,dir ".nnmaildir"))
 229 (defmacro nnmaildir--nov-dir   (dir) `(nnmaildir--subdir ,dir "nov"))
 230 (defmacro nnmaildir--marks-dir (dir) `(nnmaildir--subdir ,dir "marks"))
 231 (defmacro nnmaildir--num-dir   (dir) `(nnmaildir--subdir ,dir "num"))
 232 (defmacro nnmaildir--num-file  (dir) `(concat ,dir ":"))
 233
 234 (defmacro nnmaildir--unlink (file-arg)
 235   `(let ((file ,file-arg))
 236      (if (file-attributes file) (delete-file file))))
 237 (defun nnmaildir--mkdir (dir)
 238   (or (file-exists-p (file-name-as-directory dir))
 239       (make-directory-internal (directory-file-name dir))))
 240 (defun nnmaildir--delete-dir-files (dir ls)
 241   (when (file-attributes dir)
 242     (mapcar 'delete-file (funcall ls dir 'full "\\`[^.]" 'nosort))
 243     (delete-directory dir)))
 244
 245 (defun nnmaildir--group-maxnum (server group)
 246   (if (zerop (nnmaildir--grp-count group)) 0
 247     (let ((x (nnmaildir--srvgrp-dir (nnmaildir--srv-dir server)
 248                                     (nnmaildir--grp-name group))))
 249       (setq x (nnmaildir--nndir x)
 250             x (nnmaildir--num-dir x)
 251             x (nnmaildir--num-file x)
 252             x (file-attributes x))
 253       (if x (1- (nth 1 x)) 0))))
 254
 255 ;; Make the given server, if non-nil, be the current server.  Then make the
 256 ;; given group, if non-nil, be the current group of the current server.  Then
 257 ;; return the group object for the current group.
 258 (defun nnmaildir--prepare (server group)
 259   (let (x groups)
 260     (catch 'return
 261       (if (null server)
 262           (unless (setq server nnmaildir--cur-server)
 263             (throw 'return nil))
 264         (unless (setq server (intern-soft server nnmaildir--servers))
 265           (throw 'return nil))
 266         (setq server (symbol-value server)
 267               nnmaildir--cur-server server))
 268       (unless (setq groups (nnmaildir--srv-groups server))
 269         (throw 'return nil))
 270       (unless (nnmaildir--srv-method server)
 271         (setq x (concat "nnmaildir:" (nnmaildir--srv-address server))
 272               x (gnus-server-to-method x))
 273         (unless x (throw 'return nil))
 274         (setf (nnmaildir--srv-method server) x))
 275       (if (null group)
 276           (unless (setq group (nnmaildir--srv-curgrp server))
 277             (throw 'return nil))
 278         (unless (setq group (intern-soft group groups))
 279           (throw 'return nil))
 280         (setq group (symbol-value group)))
 281       group)))
 282
 283 (defun nnmaildir--tab-to-space (string)
 284   (let ((pos 0))
 285     (while (string-match "\t" string pos)
 286       (aset string (match-beginning 0) ? )
 287       (setq pos (match-end 0))))
 288   string)
 289
 290 (defun nnmaildir--update-nov (server group article)
 291   (let ((nnheader-file-coding-system 'binary)
 292         (srv-dir (nnmaildir--srv-dir server))
 293         (storage-version 1) ;; [version article-number msgid [...nov...]]
 294         dir gname pgname msgdir prefix suffix file attr mtime novdir novfile
 295         nov msgid nov-beg nov-mid nov-end field val old-extra num numdir
 296         deactivate-mark)
 297     (catch 'return
 298       (setq gname (nnmaildir--grp-name group)
 299             pgname (nnmaildir--pgname server gname)
 300             dir (nnmaildir--srvgrp-dir srv-dir gname)
 301             msgdir (if (nnmaildir--param pgname 'read-only)
 302                        (nnmaildir--new dir) (nnmaildir--cur dir))
 303             prefix (nnmaildir--art-prefix article)
 304             suffix (nnmaildir--art-suffix article)
 305             file (concat msgdir prefix suffix)
 306             attr (file-attributes file))
 307       (unless attr
 308         (nnmaildir--expired-article group article)
 309         (throw 'return nil))
 310       (setq mtime (nth 5 attr)
 311             attr (nth 7 attr)
 312             nov (nnmaildir--art-nov article)
 313             dir (nnmaildir--nndir dir)
 314             novdir (nnmaildir--nov-dir dir)
 315             novfile (concat novdir prefix))
 316       (unless (equal nnmaildir--extra nnmail-extra-headers)
 317         (setq nnmaildir--extra (copy-sequence nnmail-extra-headers)))
 318       (nnmaildir--with-nov-buffer
 319         ;; First we'll check for already-parsed NOV data.
 320         (cond ((not (file-exists-p novfile))
 321                ;; The NOV file doesn't exist; we have to parse the message.
 322                (setq nov nil))
 323               ((not nov)
 324                ;; The file exists, but the data isn't in memory; read the file.
 325                (erase-buffer)
 326                (nnheader-insert-file-contents novfile)
 327                (setq nov (read (current-buffer)))
 328                (if (not (and (vectorp nov)
 329                              (/= 0 (length nov))
 330                              (equal storage-version (aref nov 0))))
 331                    ;; This NOV data seems to be in the wrong format.
 332                    (setq nov nil)
 333                  (unless (nnmaildir--art-num   article)
 334                    (setf (nnmaildir--art-num   article) (aref nov 1)))
 335                  (unless (nnmaildir--art-msgid article)
 336                    (setf (nnmaildir--art-msgid article) (aref nov 2)))
 337                  (setq nov (aref nov 3)))))
 338         ;; Now check whether the already-parsed data (if we have any) is
 339         ;; usable: if the message has been edited or if nnmail-extra-headers
 340         ;; has been augmented since this data was parsed from the message,
 341         ;; then we have to reparse.  Otherwise it's up-to-date.
 342         (when (and nov (equal mtime (nnmaildir--nov-get-mtime nov)))
 343           ;; The timestamp matches.  Now check nnmail-extra-headers.
 344           (setq old-extra (nnmaildir--nov-get-extra nov))
 345           (when (equal nnmaildir--extra old-extra) ;; common case
 346             ;; Save memory; use a single copy of the list value.
 347             (nnmaildir--nov-set-extra nov nnmaildir--extra)
 348             (throw 'return nov))
 349           ;; They're not equal, but maybe the new is a subset of the old.
 350           (if (null nnmaildir--extra)
 351               ;; The empty set is a subset of every set.
 352               (throw 'return nov))
 353           (if (not (memq nil (mapcar (lambda (e) (memq e old-extra))
 354                                      nnmaildir--extra)))
 355               (throw 'return nov)))
 356         ;; Parse the NOV data out of the message.
 357         (erase-buffer)
 358         (nnheader-insert-file-contents file)
 359         (insert "\n")
 360         (goto-char (point-min))
 361         (save-restriction
 362           (if (search-forward "\n\n" nil 'noerror)
 363               (progn
 364                 (setq nov-mid (count-lines (point) (point-max)))
 365                 (narrow-to-region (point-min) (1- (point))))
 366             (setq nov-mid 0))
 367           (goto-char (point-min))
 368           (delete-char 1)
 369           (setq nov (nnheader-parse-naked-head)
 370                 field (or (mail-header-lines nov) 0)))
 371         (unless (or (zerop field) (nnmaildir--param pgname 'distrust-Lines:))
 372           (setq nov-mid field))
 373         (setq nov-mid (number-to-string nov-mid)
 374               nov-mid (concat (number-to-string attr) "\t" nov-mid))
 375         (save-match-data
 376           (setq field (or (mail-header-references nov) ""))
 377           (nnmaildir--tab-to-space field)
 378           (setq nov-mid (concat field "\t" nov-mid)
 379                 nov-beg (mapconcat
 380                           (lambda (f) (nnmaildir--tab-to-space (or f "")))
 381                           (list (mail-header-subject nov)
 382                                 (mail-header-from nov)
 383                                 (mail-header-date nov)) "\t")
 384                 nov-end (mapconcat
 385                           (lambda (extra)
 386                             (setq field (symbol-name (car extra))
 387                                   val (cdr extra))
 388                             (nnmaildir--tab-to-space field)
 389                             (nnmaildir--tab-to-space val)
 390                             (concat field ": " val))
 391                           (mail-header-extra nov) "\t")))
 392         (setq msgid (mail-header-id nov))
 393         (if (or (null msgid) (nnheader-fake-message-id-p msgid))
 394             (setq msgid (concat "<" prefix "@nnmaildir>")))
 395         (nnmaildir--tab-to-space msgid)
 396         ;; The data is parsed; create an nnmaildir NOV structure.
 397         (setq nov (nnmaildir--nov-new nov-beg nov-mid nov-end mtime
 398                                       nnmaildir--extra)
 399               num (nnmaildir--art-num article))
 400         (unless num
 401           ;; Allocate a new article number.
 402           (erase-buffer)
 403           (setq numdir (nnmaildir--num-dir dir)
 404                 file (nnmaildir--num-file numdir)
 405                 num -1)
 406           (nnmaildir--mkdir numdir)
 407           (write-region "" nil file nil 'no-message)
 408           (while file
 409             ;; Get the number of links to file.
 410             (setq attr (nth 1 (file-attributes file)))
 411             (if (= attr num)
 412                 ;; We've already tried this number, in the previous loop
 413                 ;; iteration, and failed.
 414                 (signal 'error `("Corrupt internal nnmaildir data" ,numdir)))
 415             ;; If attr is 123, try to link file to "123".  This atomically
 416             ;; increases the link count and creates the "123" link, failing
 417             ;; if that link was already created by another Gnus, just after
 418             ;; we stat()ed file.
 419             (condition-case nil
 420                 (progn
 421                   (add-name-to-file file (concat numdir (format "%x" attr)))
 422                   (setq file nil)) ;; Stop looping.
 423               (file-already-exists nil))
 424             (setq num attr))
 425           (setf (nnmaildir--art-num article) num))
 426         ;; Store this new NOV data in a file
 427         (erase-buffer)
 428         (prin1 (vector storage-version num msgid nov) (current-buffer))
 429         (setq file (concat novfile ":"))
 430         (nnmaildir--unlink file)
 431         (write-region (point-min) (point-max) file nil 'no-message nil 'excl))
 432       (rename-file file novfile 'replace)
 433       (setf (nnmaildir--art-msgid article) msgid)
 434       nov)))
 435
 436 (defun nnmaildir--cache-nov (group article nov)
 437   (let ((cache (nnmaildir--grp-cache group))
 438         (index (nnmaildir--grp-index group))
 439         goner)
 440     (unless (nnmaildir--art-nov article)
 441       (setq goner (aref cache index))
 442       (if goner (setf (nnmaildir--art-nov goner) nil))
 443       (aset cache index article)
 444       (setf (nnmaildir--grp-index group) (% (1+ index) (length cache))))
 445     (setf (nnmaildir--art-nov article) nov)))
 446
 447 (defun nnmaildir--grp-add-art (server group article)
 448   (let ((nov (nnmaildir--update-nov server group article))
 449         count num min nlist nlist-cdr insert-nlist)
 450     (when nov
 451       (setq count (1+ (nnmaildir--grp-count group))
 452             num (nnmaildir--art-num article)
 453             min (if (= count 1) num
 454                   (min num (nnmaildir--grp-min group)))
 455             nlist (nnmaildir--grp-nlist group))
 456       (if (or (null nlist) (> num (caar nlist)))
 457           (setq nlist (cons (cons num article) nlist))
 458         (setq insert-nlist t
 459               nlist-cdr (cdr nlist))
 460         (while (and nlist-cdr (< num (caar nlist-cdr)))
 461           (setq nlist nlist-cdr
 462                 nlist-cdr (cdr nlist))))
 463       (let ((inhibit-quit t))
 464         (setf (nnmaildir--grp-count group) count)
 465         (setf (nnmaildir--grp-min group) min)
 466         (if insert-nlist
 467             (setcdr nlist (cons (cons num article) nlist-cdr))
 468           (setf (nnmaildir--grp-nlist group) nlist))
 469         (set (intern (nnmaildir--art-prefix article)
 470                      (nnmaildir--grp-flist group))
 471              article)
 472         (set (intern (nnmaildir--art-msgid article)
 473                      (nnmaildir--grp-mlist group))
 474              article)
 475         (set (intern (nnmaildir--grp-name group)
 476                      (nnmaildir--srv-groups server))
 477              group))
 478       (nnmaildir--cache-nov group article nov)
 479       t)))
 480
 481 (defun nnmaildir--group-ls (server pgname)
 482   (or (nnmaildir--param pgname 'directory-files)
 483       (nnmaildir--srv-ls server)))
 484
 485 (defun nnmaildir-article-number-to-file-name
 486   (number group-name server-address-string)
 487   (let ((group (nnmaildir--prepare server-address-string group-name))
 488         article dir pgname)
 489     (catch 'return
 490       (unless group
 491         ;; The given group or server does not exist.
 492         (throw 'return nil))
 493       (setq article (nnmaildir--nlist-art group number))
 494       (unless article
 495         ;; The given article number does not exist in this group.
 496         (throw 'return nil))
 497       (setq pgname (nnmaildir--pgname nnmaildir--cur-server group-name)
 498             dir (nnmaildir--srv-dir nnmaildir--cur-server)
 499             dir (nnmaildir--srvgrp-dir dir group-name)
 500             dir (if (nnmaildir--param pgname 'read-only)
 501                     (nnmaildir--new dir) (nnmaildir--cur dir)))
 502       (concat dir (nnmaildir--art-prefix article)
 503               (nnmaildir--art-suffix article)))))
 504
 505 (defun nnmaildir-article-number-to-base-name
 506   (number group-name server-address-string)
 507   (let ((x (nnmaildir--prepare server-address-string group-name)))
 508     (when x
 509       (setq x (nnmaildir--nlist-art x number))
 510       (and x (cons (nnmaildir--art-prefix x)
 511                    (nnmaildir--art-suffix x))))))
 512
 513 (defun nnmaildir-base-name-to-article-number
 514   (base-name group-name server-address-string)
 515   (let ((x (nnmaildir--prepare server-address-string group-name)))
 516     (when x
 517       (setq x (nnmaildir--grp-flist x)
 518             x (nnmaildir--flist-art x base-name))
 519       (and x (nnmaildir--art-num x)))))
 520
 521 (defun nnmaildir--nlist-iterate (nlist ranges func)
 522   (let (entry high low nlist2)
 523     (if (eq ranges 'all)
 524         (setq ranges `((1 . ,(caar nlist)))))
 525     (while ranges
 526       (setq entry (car ranges) ranges (cdr ranges))
 527       (while (and ranges (eq entry (car ranges)))
 528         (setq ranges (cdr ranges))) ;; skip duplicates
 529       (if (numberp entry)
 530           (setq low entry
 531                 high entry)
 532         (setq low (car entry)
 533               high (cdr entry)))
 534       (setq nlist2 nlist) ;; Don't assume any sorting of ranges
 535       (catch 'iterate-loop
 536         (while nlist2
 537           (if (<= (caar nlist2) high) (throw 'iterate-loop nil))
 538           (setq nlist2 (cdr nlist2))))
 539       (catch 'iterate-loop
 540         (while nlist2
 541           (setq entry (car nlist2) nlist2 (cdr nlist2))
 542           (if (< (car entry) low) (throw 'iterate-loop nil))
 543           (funcall func (cdr entry)))))))
 544
 545 (defun nnmaildir--up2-1 (n)
 546   (if (zerop n) 1 (1- (lsh 1 (1+ (logb n))))))
 547
 548 (defun nnmaildir--system-name ()
 549   (gnus-replace-in-string
 550    (gnus-replace-in-string
 551     (gnus-replace-in-string
 552      (system-name)
 553      "\\\\" "\\134" 'literal)
 554     "/" "\\057" 'literal)
 555    ":" "\\072" 'literal))
 556
 557 (defun nnmaildir-request-type (group &optional article)
 558   'mail)
 559
 560 (defun nnmaildir-status-message (&optional server)
 561   (nnmaildir--prepare server nil)
 562   (nnmaildir--srv-error nnmaildir--cur-server))
 563
 564 (defun nnmaildir-server-opened (&optional server)
 565   (and nnmaildir--cur-server
 566        (if server
 567            (string-equal server (nnmaildir--srv-address nnmaildir--cur-server))
 568          t)
 569        (nnmaildir--srv-groups nnmaildir--cur-server)
 570        t))
 571
 572 (defun nnmaildir-open-server (server &optional defs)
 573   (let ((x server)
 574         dir size)
 575     (catch 'return
 576       (setq server (intern-soft x nnmaildir--servers))
 577       (if server
 578           (and (setq server (symbol-value server))
 579                (nnmaildir--srv-groups server)
 580                (setq nnmaildir--cur-server server)
 581                (throw 'return t))
 582         (setq server (make-nnmaildir--srv :address x))
 583         (let ((inhibit-quit t))
 584           (set (intern x nnmaildir--servers) server)))
 585       (setq dir (assq 'directory defs))
 586       (unless dir
 587         (setf (nnmaildir--srv-error server)
 588               "You must set \"directory\" in the select method")
 589         (throw 'return nil))
 590       (setq dir (cadr dir)
 591             dir (eval dir)
 592             dir (expand-file-name dir)
 593             dir (file-name-as-directory dir))
 594       (unless (file-exists-p dir)
 595         (setf (nnmaildir--srv-error server) (concat "No such directory: " dir))
 596         (throw 'return nil))
 597       (setf (nnmaildir--srv-dir server) dir)
 598       (setq x (assq 'directory-files defs))
 599       (if (null x)
 600           (setq x (if nnheader-directory-files-is-safe 'directory-files
 601                     'nnheader-directory-files-safe))
 602         (setq x (cadr x))
 603         (unless (functionp x)
 604           (setf (nnmaildir--srv-error server)
 605                 (concat "Not a function: " (prin1-to-string x)))
 606           (throw 'return nil)))
 607       (setf (nnmaildir--srv-ls server) x)
 608       (setq size (length (funcall x dir nil "\\`[^.]" 'nosort))
 609             size (nnmaildir--up2-1 size))
 610       (and (setq x (assq 'get-new-mail defs))
 611            (setq x (cdr x))
 612            (car x)
 613            (setf (nnmaildir--srv-gnm server) t)
 614            (require 'nnmail))
 615       (setq x (assq 'target-prefix defs))
 616       (if x
 617           (progn
 618             (setq x (cadr x)
 619                   x (eval x))
 620             (setf (nnmaildir--srv-target-prefix server) x))
 621         (setq x (assq 'create-directory defs))
 622         (if x
 623             (progn
 624               (setq x (cadr x)
 625                     x (eval x)
 626                     x (file-name-as-directory x))
 627               (setf (nnmaildir--srv-target-prefix server) x))
 628           (setf (nnmaildir--srv-target-prefix server) "")))
 629       (setf (nnmaildir--srv-groups server) (make-vector size 0))
 630       (setq nnmaildir--cur-server server)
 631       t)))
 632
 633 (defun nnmaildir--parse-filename (file)
 634   (let ((prefix (car file))
 635         timestamp len)
 636     (if (string-match "\\`\\([0-9]+\\)\\(\\..*\\)\\'" prefix)
 637         (progn
 638           (setq timestamp (concat "0000" (match-string 1 prefix))
 639                 len (- (length timestamp) 4))
 640           (vector (string-to-number (substring timestamp 0 len))
 641                   (string-to-number (substring timestamp len))
 642                   (match-string 2 prefix)
 643                   file))
 644       file)))
 645
 646 (defun nnmaildir--sort-files (a b)
 647   (catch 'return
 648     (if (consp a)
 649         (throw 'return (and (consp b) (string-lessp (car a) (car b)))))
 650     (if (consp b) (throw 'return t))
 651     (if (< (aref a 0) (aref b 0)) (throw 'return t))
 652     (if (> (aref a 0) (aref b 0)) (throw 'return nil))
 653     (if (< (aref a 1) (aref b 1)) (throw 'return t))
 654     (if (> (aref a 1) (aref b 1)) (throw 'return nil))
 655     (string-lessp (aref a 2) (aref b 2))))
 656
 657 (defun nnmaildir--scan (gname scan-msgs groups method srv-dir srv-ls)
 658   (catch 'return
 659     (let ((36h-ago (- (car (current-time)) 2))
 660           absdir nndir tdir ndir cdir nattr cattr isnew pgname read-only ls
 661           files num dir flist group x)
 662       (setq absdir (nnmaildir--srvgrp-dir srv-dir gname)
 663             nndir (nnmaildir--nndir absdir))
 664       (unless (file-exists-p absdir)
 665         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 666               (concat "No such directory: " absdir))
 667         (throw 'return nil))
 668       (setq tdir (nnmaildir--tmp absdir)
 669             ndir (nnmaildir--new absdir)
 670             cdir (nnmaildir--cur absdir)
 671             nattr (file-attributes ndir)
 672             cattr (file-attributes cdir))
 673       (unless (and (file-exists-p tdir) nattr cattr)
 674         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 675               (concat "Not a maildir: " absdir))
 676         (throw 'return nil))
 677       (setq group (nnmaildir--prepare nil gname)
 678             pgname (nnmaildir--pgname nnmaildir--cur-server gname))
 679       (if group
 680           (setq isnew nil)
 681         (setq isnew t
 682               group (make-nnmaildir--grp :name gname :index 0))
 683         (nnmaildir--mkdir nndir)
 684         (nnmaildir--mkdir (nnmaildir--nov-dir   nndir))
 685         (nnmaildir--mkdir (nnmaildir--marks-dir nndir))
 686         (write-region "" nil (concat nndir "markfile") nil 'no-message))
 687       (setq read-only (nnmaildir--param pgname 'read-only)
 688             ls (or (nnmaildir--param pgname 'directory-files) srv-ls))
 689       (unless read-only
 690         (setq x (nth 11 (file-attributes tdir)))
 691         (unless (and (= x (nth 11 nattr)) (= x (nth 11 cattr)))
 692           (setf (nnmaildir--srv-error nnmaildir--cur-server)
 693                 (concat "Maildir spans filesystems: " absdir))
 694           (throw 'return nil))
 695         (mapcar
 696          (lambda (file)
 697            (setq x (file-attributes file))
 698            (if (or (> (cadr x) 1) (< (car (nth 4 x)) 36h-ago))
 699                (delete-file file)))
 700          (funcall ls tdir 'full "\\`[^.]" 'nosort)))
 701       (or scan-msgs
 702           isnew
 703           (throw 'return t))
 704       (setq nattr (nth 5 nattr))
 705       (if (equal nattr (nnmaildir--grp-new group))
 706           (setq nattr nil))
 707       (if read-only (setq dir (and (or isnew nattr) ndir))
 708         (when (or isnew nattr)
 709           (mapcar
 710            (lambda (file)
 711              (let ((path (concat ndir file)))
 712                (and (time-less-p (nth 5 (file-attributes path)) (current-time))
 713                     (rename-file path (concat cdir file ":2,")))))
 714            (funcall ls ndir nil "\\`[^.]" 'nosort))
 715           (setf (nnmaildir--grp-new group) nattr))
 716         (setq cattr (nth 5 (file-attributes cdir)))
 717         (if (equal cattr (nnmaildir--grp-cur group))
 718             (setq cattr nil))
 719         (setq dir (and (or isnew cattr) cdir)))
 720       (unless dir (throw 'return t))
 721       (setq files (funcall ls dir nil "\\`[^.]" 'nosort)
 722             files (save-match-data
 723                     (mapcar
 724                      (lambda (f)
 725                        (string-match "\\`\\([^:]*\\)\\(\\(:.*\\)?\\)\\'" f)
 726                        (cons (match-string 1 f) (match-string 2 f)))
 727                      files)))
 728       (when isnew
 729         (setq num (nnmaildir--up2-1 (length files)))
 730         (setf (nnmaildir--grp-flist group) (make-vector num 0))
 731         (setf (nnmaildir--grp-mlist group) (make-vector num 0))
 732         (setf (nnmaildir--grp-mmth group) (make-vector 1 0))
 733         (setq num (nnmaildir--param pgname 'nov-cache-size))
 734         (if (numberp num) (if (< num 1) (setq num 1))
 735           (setq num 16
 736                 cdir (nnmaildir--marks-dir nndir)
 737                 ndir (nnmaildir--subdir cdir "tick")
 738                 cdir (nnmaildir--subdir cdir "read"))
 739           (mapcar
 740            (lambda (file)
 741              (setq file (car file))
 742              (if (or (not (file-exists-p (concat cdir file)))
 743                      (file-exists-p (concat ndir file)))
 744                  (setq num (1+ num))))
 745            files))
 746         (setf (nnmaildir--grp-cache group) (make-vector num nil))
 747         (let ((inhibit-quit t))
 748           (set (intern gname groups) group))
 749         (or scan-msgs (throw 'return t)))
 750       (setq flist (nnmaildir--grp-flist group)
 751             files (mapcar
 752                    (lambda (file)
 753                      (and (null (nnmaildir--flist-art flist (car file)))
 754                           file))
 755                    files)
 756             files (delq nil files)
 757             files (mapcar 'nnmaildir--parse-filename files)
 758             files (sort files 'nnmaildir--sort-files))
 759       (mapcar
 760        (lambda (file)
 761          (setq file (if (consp file) file (aref file 3))
 762                x (make-nnmaildir--art :prefix (car file) :suffix (cdr file)))
 763          (nnmaildir--grp-add-art nnmaildir--cur-server group x))
 764        files)
 765       (if read-only (setf (nnmaildir--grp-new group) nattr)
 766         (setf (nnmaildir--grp-cur group) cattr)))
 767     t))
 768
 769 (defun nnmaildir-request-scan (&optional scan-group server)
 770   (let ((coding-system-for-write nnheader-file-coding-system)
 771         (buffer-file-coding-system nil)
 772         (file-coding-system-alist nil)
 773         (nnmaildir-get-new-mail t)
 774         (nnmaildir-group-alist nil)
 775         (nnmaildir-active-file nil)
 776         x srv-ls srv-dir method groups target-prefix group dirs grp-dir seen
 777         deactivate-mark)
 778     (nnmaildir--prepare server nil)
 779     (setq srv-ls (nnmaildir--srv-ls nnmaildir--cur-server)
 780           srv-dir (nnmaildir--srv-dir nnmaildir--cur-server)
 781           method (nnmaildir--srv-method nnmaildir--cur-server)
 782           groups (nnmaildir--srv-groups nnmaildir--cur-server)
 783           target-prefix (nnmaildir--srv-target-prefix nnmaildir--cur-server))
 784     (nnmaildir--with-work-buffer
 785       (save-match-data
 786         (if (stringp scan-group)
 787             (if (nnmaildir--scan scan-group t groups method srv-dir srv-ls)
 788                 (if (nnmaildir--srv-gnm nnmaildir--cur-server)
 789                     (nnmail-get-new-mail 'nnmaildir nil nil scan-group))
 790               (unintern scan-group groups))
 791           (setq x (nth 5 (file-attributes srv-dir))
 792                 scan-group (null scan-group))
 793           (if (equal x (nnmaildir--srv-mtime nnmaildir--cur-server))
 794               (if scan-group
 795                   (mapatoms (lambda (sym)
 796                               (nnmaildir--scan (symbol-name sym) t groups
 797                                                method srv-dir srv-ls))
 798                             groups))
 799             (setq dirs (funcall srv-ls srv-dir nil "\\`[^.]" 'nosort)
 800                   dirs (if (zerop (length target-prefix))
 801                            dirs
 802                          (gnus-remove-if
 803                           (lambda (dir)
 804                             (and (>= (length dir) (length target-prefix))
 805                                  (string= (substring dir 0
 806                                                      (length target-prefix))
 807                                           target-prefix)))
 808                           dirs))
 809                   seen (nnmaildir--up2-1 (length dirs))
 810                   seen (make-vector seen 0))
 811             (mapcar
 812              (lambda (grp-dir)
 813                (if (nnmaildir--scan grp-dir scan-group groups method srv-dir
 814                                     srv-ls)
 815                    (intern grp-dir seen)))
 816              dirs)
 817             (setq x nil)
 818             (mapatoms (lambda (group)
 819                         (setq group (symbol-name group))
 820                         (unless (intern-soft group seen)
 821                           (setq x (cons group x))))
 822                       groups)
 823             (mapcar (lambda (grp) (unintern grp groups)) x)
 824             (setf (nnmaildir--srv-mtime nnmaildir--cur-server)
 825                   (nth 5 (file-attributes srv-dir))))
 826           (and scan-group
 827                (nnmaildir--srv-gnm nnmaildir--cur-server)
 828                (nnmail-get-new-mail 'nnmaildir nil nil))))))
 829   t)
 830
 831 (defun nnmaildir-request-list (&optional server)
 832   (nnmaildir-request-scan 'find-new-groups server)
 833   (let (pgname ro deactivate-mark)
 834     (nnmaildir--prepare server nil)
 835     (nnmaildir--with-nntp-buffer
 836       (erase-buffer)
 837       (mapatoms (lambda (group)
 838                   (setq pgname (symbol-name group)
 839                         pgname (nnmaildir--pgname nnmaildir--cur-server pgname)
 840                         group (symbol-value group)
 841                         ro (nnmaildir--param pgname 'read-only))
 842                   (insert (nnmaildir--grp-name group) " ")
 843                   (princ (nnmaildir--group-maxnum nnmaildir--cur-server group)
 844                          nntp-server-buffer)
 845                   (insert " ")
 846                   (princ (nnmaildir--grp-min group) nntp-server-buffer)
 847                   (insert " " (if ro "n" "y") "\n"))
 848                 (nnmaildir--srv-groups nnmaildir--cur-server))))
 849   t)
 850
 851 (defun nnmaildir-request-newgroups (date &optional server)
 852   (nnmaildir-request-list server))
 853
 854 (defun nnmaildir-retrieve-groups (groups &optional server)
 855   (let (group deactivate-mark)
 856     (nnmaildir--prepare server nil)
 857     (nnmaildir--with-nntp-buffer
 858       (erase-buffer)
 859       (mapcar
 860        (lambda (gname)
 861          (setq group (nnmaildir--prepare nil gname))
 862          (if (null group) (insert "411 no such news group\n")
 863            (insert "211 ")
 864            (princ (nnmaildir--grp-count group) nntp-server-buffer)
 865            (insert " ")
 866            (princ (nnmaildir--grp-min   group) nntp-server-buffer)
 867            (insert " ")
 868            (princ (nnmaildir--group-maxnum nnmaildir--cur-server group)
 869                   nntp-server-buffer)
 870            (insert " " gname "\n")))
 871        groups)))
 872   'group)
 873
 874 (defun nnmaildir-request-update-info (gname info &optional server)
 875   (let ((group (nnmaildir--prepare server gname))
 876         pgname flist always-marks never-marks old-marks dotfile num dir
 877         markdirs marks mark ranges markdir article read end new-marks ls
 878         old-mmth new-mmth mtime mark-sym existing missing deactivate-mark)
 879     (catch 'return
 880       (unless group
 881         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 882               (concat "No such group: " gname))
 883         (throw 'return nil))
 884       (setq gname (nnmaildir--grp-name group)
 885             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
 886             flist (nnmaildir--grp-flist group))
 887       (when (zerop (nnmaildir--grp-count group))
 888         (gnus-info-set-read info nil)
 889         (gnus-info-set-marks info nil 'extend)
 890         (throw 'return info))
 891       (setq old-marks (cons 'read (gnus-info-read info))
 892             old-marks (cons old-marks (gnus-info-marks info))
 893             always-marks (nnmaildir--param pgname 'always-marks)
 894             never-marks (nnmaildir--param pgname 'never-marks)
 895             existing (nnmaildir--grp-nlist group)
 896             existing (mapcar 'car existing)
 897             existing (nreverse existing)
 898             existing (gnus-compress-sequence existing 'always-list)
 899             missing (list (cons 1 (nnmaildir--group-maxnum
 900                                    nnmaildir--cur-server group)))
 901             missing (gnus-range-difference missing existing)
 902             dir (nnmaildir--srv-dir nnmaildir--cur-server)
 903             dir (nnmaildir--srvgrp-dir dir gname)
 904             dir (nnmaildir--nndir dir)
 905             dir (nnmaildir--marks-dir dir)
 906             ls (nnmaildir--group-ls nnmaildir--cur-server pgname)
 907             markdirs (funcall ls dir nil "\\`[^.]" 'nosort)
 908             new-mmth (nnmaildir--up2-1 (length markdirs))
 909             new-mmth (make-vector new-mmth 0)
 910             old-mmth (nnmaildir--grp-mmth group))
 911       (mapcar
 912        (lambda (mark)
 913          (setq markdir (nnmaildir--subdir dir mark)
 914                mark-sym (intern mark)
 915                ranges nil)
 916          (catch 'got-ranges
 917            (if (memq mark-sym never-marks) (throw 'got-ranges nil))
 918            (when (memq mark-sym always-marks)
 919              (setq ranges existing)
 920              (throw 'got-ranges nil))
 921            (setq mtime (nth 5 (file-attributes markdir)))
 922            (set (intern mark new-mmth) mtime)
 923            (when (equal mtime (symbol-value (intern-soft mark old-mmth)))
 924              (setq ranges (assq mark-sym old-marks))
 925              (if ranges (setq ranges (cdr ranges)))
 926              (throw 'got-ranges nil))
 927            (mapcar
 928             (lambda (prefix)
 929               (setq article (nnmaildir--flist-art flist prefix))
 930               (if article
 931                   (setq ranges
 932                         (gnus-add-to-range ranges
 933                                            `(,(nnmaildir--art-num article))))))
 934             (funcall ls markdir nil "\\`[^.]" 'nosort)))
 935          (if (eq mark-sym 'read) (setq read ranges)
 936            (if ranges (setq marks (cons (cons mark-sym ranges) marks)))))
 937        markdirs)
 938       (gnus-info-set-read info (gnus-range-add read missing))
 939       (gnus-info-set-marks info marks 'extend)
 940       (setf (nnmaildir--grp-mmth group) new-mmth)
 941       info)))
 942
 943 (defun nnmaildir-request-group (gname &optional server fast)
 944   (let ((group (nnmaildir--prepare server gname))
 945         deactivate-mark)
 946     (catch 'return
 947       (unless group
 948         ;; (insert "411 no such news group\n")
 949         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 950               (concat "No such group: " gname))
 951         (throw 'return nil))
 952       (setf (nnmaildir--srv-curgrp nnmaildir--cur-server) group)
 953       (if fast (throw 'return t))
 954       (nnmaildir--with-nntp-buffer
 955         (erase-buffer)
 956         (insert "211 ")
 957         (princ (nnmaildir--grp-count group) nntp-server-buffer)
 958         (insert " ")
 959         (princ (nnmaildir--grp-min   group) nntp-server-buffer)
 960         (insert " ")
 961         (princ (nnmaildir--group-maxnum nnmaildir--cur-server group)
 962                nntp-server-buffer)
 963         (insert " " gname "\n")
 964         t))))
 965
 966 (defun nnmaildir-request-create-group (gname &optional server args)
 967   (nnmaildir--prepare server nil)
 968   (catch 'return
 969     (let ((target-prefix (nnmaildir--srv-target-prefix nnmaildir--cur-server))
 970           srv-dir dir groups)
 971       (when (zerop (length gname))
 972         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 973               "Invalid (empty) group name")
 974         (throw 'return nil))
 975       (when (eq (aref "." 0) (aref gname 0))
 976         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 977               "Group names may not start with \".\"")
 978         (throw 'return nil))
 979       (when (save-match-data (string-match "[\0/\t]" gname))
 980         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 981               (concat "Invalid characters (null, tab, or /) in group name: "
 982                       gname))
 983         (throw 'return nil))
 984       (setq groups (nnmaildir--srv-groups nnmaildir--cur-server))
 985       (when (intern-soft gname groups)
 986         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 987               (concat "Group already exists: " gname))
 988         (throw 'return nil))
 989       (setq srv-dir (nnmaildir--srv-dir nnmaildir--cur-server))
 990       (if (file-name-absolute-p target-prefix)
 991           (setq dir (expand-file-name target-prefix))
 992         (setq dir srv-dir
 993               dir (file-truename dir)
 994               dir (concat dir target-prefix)))
 995       (setq dir (nnmaildir--subdir dir gname))
 996       (nnmaildir--mkdir dir)
 997       (nnmaildir--mkdir (nnmaildir--tmp dir))
 998       (nnmaildir--mkdir (nnmaildir--new dir))
 999       (nnmaildir--mkdir (nnmaildir--cur dir))
1000       (unless (string= target-prefix "")
1001         (make-symbolic-link (concat target-prefix gname)
1002                             (concat srv-dir gname)))
1003       (nnmaildir-request-scan 'find-new-groups))))
1004
1005 (defun nnmaildir-request-rename-group (gname new-name &optional server)
1006   (let ((group (nnmaildir--prepare server gname))
1007         (coding-system-for-write nnheader-file-coding-system)
1008         (buffer-file-coding-system nil)
1009         (file-coding-system-alist nil)
1010         srv-dir x groups)
1011     (catch 'return
1012       (unless group
1013         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1014               (concat "No such group: " gname))
1015         (throw 'return nil))
1016       (when (zerop (length new-name))
1017         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1018               "Invalid (empty) group name")
1019         (throw 'return nil))
1020       (when (eq (aref "." 0) (aref new-name 0))
1021         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1022               "Group names may not start with \".\"")
1023         (throw 'return nil))
1024       (when (save-match-data (string-match "[\0/\t]" new-name))
1025         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1026               (concat "Invalid characters (null, tab, or /) in group name: "
1027                       new-name))
1028         (throw 'return nil))
1029       (if (string-equal gname new-name) (throw 'return t))
1030       (when (intern-soft new-name
1031                          (nnmaildir--srv-groups nnmaildir--cur-server))
1032         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1033               (concat "Group already exists: " new-name))
1034         (throw 'return nil))
1035       (setq srv-dir (nnmaildir--srv-dir nnmaildir--cur-server))
1036       (condition-case err
1037           (rename-file (concat srv-dir gname)
1038                        (concat srv-dir new-name))
1039         (error
1040          (setf (nnmaildir--srv-error nnmaildir--cur-server)
1041                (concat "Error renaming link: " (prin1-to-string err)))
1042          (throw 'return nil)))
1043       (setq x (nnmaildir--srv-groups nnmaildir--cur-server)
1044             groups (make-vector (length x) 0))
1045       (mapatoms (lambda (sym)
1046                   (unless (eq (symbol-value sym) group)
1047                     (set (intern (symbol-name sym) groups)
1048                          (symbol-value sym))))
1049                 x)
1050       (setq group (copy-sequence group))
1051       (setf (nnmaildir--grp-name group) new-name)
1052       (set (intern new-name groups) group)
1053       (setf (nnmaildir--srv-groups nnmaildir--cur-server) groups)
1054       t)))
1055
1056 (defun nnmaildir-request-delete-group (gname force &optional server)
1057   (let ((group (nnmaildir--prepare server gname))
1058         pgname grp-dir target dir ls deactivate-mark)
1059     (catch 'return
1060       (unless group
1061         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1062               (concat "No such group: " gname))
1063         (throw 'return nil))
1064       (setq gname (nnmaildir--grp-name group)
1065             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1066             grp-dir (nnmaildir--srv-dir nnmaildir--cur-server)
1067             target (car (file-attributes (concat grp-dir gname)))
1068             grp-dir (nnmaildir--srvgrp-dir grp-dir gname))
1069       (unless (or force (stringp target))
1070         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1071               (concat "Not a symlink: " gname))
1072         (throw 'return nil))
1073       (if (eq group (nnmaildir--srv-curgrp nnmaildir--cur-server))
1074           (setf (nnmaildir--srv-curgrp nnmaildir--cur-server) nil))
1075       (unintern gname (nnmaildir--srv-groups nnmaildir--cur-server))
1076       (if (not force)
1077           (progn
1078             (setq grp-dir (directory-file-name grp-dir))
1079             (nnmaildir--unlink grp-dir))
1080         (setq ls (nnmaildir--group-ls nnmaildir--cur-server pgname))
1081         (if (nnmaildir--param pgname 'read-only)
1082             (progn (delete-directory  (nnmaildir--tmp grp-dir))
1083                    (nnmaildir--unlink (nnmaildir--new grp-dir))
1084                    (delete-directory  (nnmaildir--cur grp-dir)))
1085           (nnmaildir--delete-dir-files (nnmaildir--tmp grp-dir) ls)
1086           (nnmaildir--delete-dir-files (nnmaildir--new grp-dir) ls)
1087           (nnmaildir--delete-dir-files (nnmaildir--cur grp-dir) ls))
1088         (setq dir (nnmaildir--nndir grp-dir))
1089         (mapcar (lambda (subdir) (nnmaildir--delete-dir-files subdir ls))
1090                 `(,(nnmaildir--nov-dir dir) ,(nnmaildir--num-dir dir)
1091                   ,@(funcall ls (nnmaildir--marks-dir dir) 'full "\\`[^.]"
1092                              'nosort)))
1093         (setq dir (nnmaildir--nndir grp-dir))
1094         (nnmaildir--unlink (concat dir "markfile"))
1095         (nnmaildir--unlink (concat dir "markfile{new}"))
1096         (delete-directory (nnmaildir--marks-dir dir))
1097         (delete-directory dir)
1098         (if (not (stringp target))
1099             (delete-directory grp-dir)
1100           (setq grp-dir (directory-file-name grp-dir)
1101                 dir target)
1102           (unless (eq (aref "/" 0) (aref dir 0))
1103             (setq dir (concat (file-truename
1104                                (nnmaildir--srv-dir nnmaildir--cur-server))
1105                               dir)))
1106           (delete-directory dir)
1107           (nnmaildir--unlink grp-dir)))
1108       t)))
1109
1110 (defun nnmaildir-retrieve-headers (articles &optional gname server fetch-old)
1111   (let ((group (nnmaildir--prepare server gname))
1112         srv-dir dir nlist mlist article num start stop nov nlist2 insert-nov
1113         deactivate-mark)
1114     (setq insert-nov
1115           (lambda (article)
1116             (setq nov (nnmaildir--update-nov nnmaildir--cur-server group
1117                                              article))
1118             (when nov
1119               (nnmaildir--cache-nov group article nov)
1120               (setq num (nnmaildir--art-num article))
1121               (princ num nntp-server-buffer)
1122               (insert "\t" (nnmaildir--nov-get-beg nov) "\t"
1123                       (nnmaildir--art-msgid article) "\t"
1124                       (nnmaildir--nov-get-mid nov) "\tXref: nnmaildir "
1125                       gname ":")
1126               (princ num nntp-server-buffer)
1127               (insert "\t" (nnmaildir--nov-get-end nov) "\n"))))
1128     (catch 'return
1129       (unless group
1130         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1131               (if gname (concat "No such group: " gname) "No current group"))
1132         (throw 'return nil))
1133       (nnmaildir--with-nntp-buffer
1134         (erase-buffer)
1135         (setq mlist (nnmaildir--grp-mlist group)
1136               nlist (nnmaildir--grp-nlist group)
1137               gname (nnmaildir--grp-name group)
1138               srv-dir (nnmaildir--srv-dir nnmaildir--cur-server)
1139               dir (nnmaildir--srvgrp-dir srv-dir gname))
1140         (cond
1141          ((null nlist))
1142          ((and fetch-old (not (numberp fetch-old)))
1143           (nnmaildir--nlist-iterate nlist 'all insert-nov))
1144          ((null articles))
1145          ((stringp (car articles))
1146           (mapcar
1147            (lambda (msgid)
1148              (setq article (nnmaildir--mlist-art mlist msgid))
1149              (if article (funcall insert-nov article)))
1150            articles))
1151          (t
1152           (if fetch-old
1153               ;; Assume the article range list is sorted ascending
1154               (setq stop (car articles)
1155                     start (car (last articles))
1156                     stop  (if (numberp stop)  stop  (car stop))
1157                     start (if (numberp start) start (cdr start))
1158                     stop (- stop fetch-old)
1159                     stop (if (< stop 1) 1 stop)
1160                     articles (list (cons stop start))))
1161           (nnmaildir--nlist-iterate nlist articles insert-nov)))
1162         (sort-numeric-fields 1 (point-min) (point-max))
1163         'nov))))
1164
1165 (defun nnmaildir-request-article (num-msgid &optional gname server to-buffer)
1166   (let ((group (nnmaildir--prepare server gname))
1167         (case-fold-search t)
1168         list article dir pgname deactivate-mark)
1169     (catch 'return
1170       (unless group
1171         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1172               (if gname (concat "No such group: " gname) "No current group"))
1173         (throw 'return nil))
1174       (if (numberp num-msgid)
1175           (setq article (nnmaildir--nlist-art group num-msgid))
1176         (setq list (nnmaildir--grp-mlist group)
1177               article (nnmaildir--mlist-art list num-msgid))
1178         (if article (setq num-msgid (nnmaildir--art-num article))
1179           (catch 'found
1180             (mapatoms
1181               (lambda (group-sym)
1182                 (setq group (symbol-value group-sym)
1183                       list (nnmaildir--grp-mlist group)
1184                       article (nnmaildir--mlist-art list num-msgid))
1185                 (when article
1186                   (setq num-msgid (nnmaildir--art-num article))
1187                   (throw 'found nil)))
1188               (nnmaildir--srv-groups nnmaildir--cur-server))))
1189         (unless article
1190           (setf (nnmaildir--srv-error nnmaildir--cur-server) "No such article")
1191           (throw 'return nil)))
1192       (setq gname (nnmaildir--grp-name group)
1193             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1194             dir (nnmaildir--srv-dir nnmaildir--cur-server)
1195             dir (nnmaildir--srvgrp-dir dir gname)
1196             dir (if (nnmaildir--param pgname 'read-only)
1197                     (nnmaildir--new dir) (nnmaildir--cur dir))
1198             nnmaildir-article-file-name
1199             (concat dir
1200                     (nnmaildir--art-prefix article)
1201                     (nnmaildir--art-suffix article)))
1202       (unless (file-exists-p nnmaildir-article-file-name)
1203         (nnmaildir--expired-article group article)
1204         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1205               "Article has expired")
1206         (throw 'return nil))
1207       (save-excursion
1208         (set-buffer (or to-buffer nntp-server-buffer))
1209         (erase-buffer)
1210         (nnheader-insert-file-contents nnmaildir-article-file-name))
1211       (cons gname num-msgid))))
1212
1213 (defun nnmaildir-request-post (&optional server)
1214   (let (message-required-mail-headers)
1215     (funcall message-send-mail-function)))
1216
1217 (defun nnmaildir-request-replace-article (number gname buffer)
1218   (let ((group (nnmaildir--prepare nil gname))
1219         (coding-system-for-write nnheader-file-coding-system)
1220         (buffer-file-coding-system nil)
1221         (file-coding-system-alist nil)
1222         dir file article suffix tmpfile deactivate-mark)
1223     (catch 'return
1224       (unless group
1225         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1226               (concat "No such group: " gname))
1227         (throw 'return nil))
1228       (when (nnmaildir--param (nnmaildir--pgname nnmaildir--cur-server gname)
1229                               'read-only)
1230         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1231               (concat "Read-only group: " group))
1232         (throw 'return nil))
1233       (setq dir (nnmaildir--srv-dir nnmaildir--cur-server)
1234             dir (nnmaildir--srvgrp-dir dir gname)
1235             article (nnmaildir--nlist-art group number))
1236       (unless article
1237         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1238               (concat "No such article: " (number-to-string number)))
1239         (throw 'return nil))
1240       (setq suffix (nnmaildir--art-suffix article)
1241             file (nnmaildir--art-prefix article)
1242             tmpfile (concat (nnmaildir--tmp dir) file))
1243       (when (file-exists-p tmpfile)
1244         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1245               (concat "File exists: " tmpfile))
1246         (throw 'return nil))
1247       (save-excursion
1248         (set-buffer buffer)
1249         (write-region (point-min) (point-max) tmpfile nil 'no-message nil
1250                       'excl))
1251       (unix-sync) ;; no fsync :(
1252       (rename-file tmpfile (concat (nnmaildir--cur dir) file suffix) 'replace)
1253       t)))
1254
1255 (defun nnmaildir-request-move-article (article gname server accept-form
1256                                                &optional last)
1257   (let ((group (nnmaildir--prepare server gname))
1258         pgname suffix result nnmaildir--file deactivate-mark)
1259     (catch 'return
1260       (unless group
1261         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1262               (concat "No such group: " gname))
1263         (throw 'return nil))
1264       (setq gname (nnmaildir--grp-name group)
1265             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1266             article (nnmaildir--nlist-art group article))
1267       (unless article
1268         (setf (nnmaildir--srv-error nnmaildir--cur-server) "No such article")
1269         (throw 'return nil))
1270       (setq suffix (nnmaildir--art-suffix article)
1271             nnmaildir--file (nnmaildir--srv-dir nnmaildir--cur-server)
1272             nnmaildir--file (nnmaildir--srvgrp-dir nnmaildir--file gname)
1273             nnmaildir--file (if (nnmaildir--param pgname 'read-only)
1274                                 (nnmaildir--new nnmaildir--file)
1275                               (nnmaildir--cur nnmaildir--file))
1276             nnmaildir--file (concat nnmaildir--file
1277                                     (nnmaildir--art-prefix article)
1278                                     suffix))
1279       (unless (file-exists-p nnmaildir--file)
1280         (nnmaildir--expired-article group article)
1281         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1282               "Article has expired")
1283         (throw 'return nil))
1284       (nnmaildir--with-move-buffer
1285         (erase-buffer)
1286         (nnheader-insert-file-contents nnmaildir--file)
1287         (setq result (eval accept-form)))
1288       (unless (or (null result) (nnmaildir--param pgname 'read-only))
1289         (nnmaildir--unlink nnmaildir--file)
1290         (nnmaildir--expired-article group article))
1291       result)))
1292
1293 (defun nnmaildir-request-accept-article (gname &optional server last)
1294   (let ((group (nnmaildir--prepare server gname))
1295         (coding-system-for-write nnheader-file-coding-system)
1296         (buffer-file-coding-system nil)
1297         (file-coding-system-alist nil)
1298         srv-dir dir file time tmpfile curfile 24h article)
1299     (catch 'return
1300       (unless group
1301         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1302               (concat "No such group: " gname))
1303         (throw 'return nil))
1304       (setq gname (nnmaildir--grp-name group))
1305       (when (nnmaildir--param (nnmaildir--pgname nnmaildir--cur-server gname)
1306                               'read-only)
1307         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1308               (concat "Read-only group: " gname))
1309         (throw 'return nil))
1310       (setq srv-dir (nnmaildir--srv-dir nnmaildir--cur-server)
1311             dir (nnmaildir--srvgrp-dir srv-dir gname)
1312             time (current-time)
1313             file (format-time-string "%s." time))
1314       (unless (string-equal nnmaildir--delivery-time file)
1315         (setq nnmaildir--delivery-time file
1316               nnmaildir--delivery-count 0))
1317       (when (and (consp (cdr time))
1318                  (consp (cddr time)))
1319         (setq file (concat file "M" (number-to-string (caddr time)))))
1320       (setq file (concat file nnmaildir--delivery-pid)
1321             file (concat file "Q" (number-to-string nnmaildir--delivery-count))
1322             file (concat file "." (nnmaildir--system-name))
1323             tmpfile (concat (nnmaildir--tmp dir) file)
1324             curfile (concat (nnmaildir--cur dir) file ":2,"))
1325       (when (file-exists-p tmpfile)
1326         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1327               (concat "File exists: " tmpfile))
1328         (throw 'return nil))
1329       (when (file-exists-p curfile)
1330         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1331               (concat "File exists: " curfile))
1332         (throw 'return nil))
1333       (setq nnmaildir--delivery-count (1+ nnmaildir--delivery-count)
1334             24h (run-with-timer 86400 nil
1335                                 (lambda ()
1336                                   (nnmaildir--unlink tmpfile)
1337                                   (setf (nnmaildir--srv-error
1338                                           nnmaildir--cur-server)
1339                                         "24-hour timer expired")
1340                                   (throw 'return nil))))
1341       (condition-case nil
1342           (add-name-to-file nnmaildir--file tmpfile)
1343         (error
1344          (write-region (point-min) (point-max) tmpfile nil 'no-message nil
1345                        'excl)
1346          (unix-sync))) ;; no fsync :(
1347       (nnheader-cancel-timer 24h)
1348       (condition-case err
1349           (add-name-to-file tmpfile curfile)
1350         (error
1351          (setf (nnmaildir--srv-error nnmaildir--cur-server)
1352                (concat "Error linking: " (prin1-to-string err)))
1353          (nnmaildir--unlink tmpfile)
1354          (throw 'return nil)))
1355       (nnmaildir--unlink tmpfile)
1356       (setq article (make-nnmaildir--art :prefix file :suffix ":2,"))
1357       (if (nnmaildir--grp-add-art nnmaildir--cur-server group article)
1358           (cons gname (nnmaildir--art-num article))))))
1359
1360 (defun nnmaildir-save-mail (group-art)
1361   (catch 'return
1362     (unless group-art
1363       (throw 'return nil))
1364     (let (ga gname x groups nnmaildir--file deactivate-mark)
1365       (save-excursion
1366         (goto-char (point-min))
1367         (save-match-data
1368           (while (looking-at "From ")
1369             (replace-match "X-From-Line: ")
1370             (forward-line 1))))
1371       (setq groups (nnmaildir--srv-groups nnmaildir--cur-server)
1372             ga (car group-art) group-art (cdr group-art)
1373             gname (car ga))
1374       (or (intern-soft gname groups)
1375           (nnmaildir-request-create-group gname)
1376           (throw 'return nil)) ;; not that nnmail bothers to check :(
1377       (unless (nnmaildir-request-accept-article gname)
1378         (throw 'return nil))
1379       (setq nnmaildir--file (nnmaildir--srv-dir nnmaildir--cur-server)
1380             nnmaildir--file (nnmaildir--srvgrp-dir nnmaildir--file gname)
1381             x (nnmaildir--prepare nil gname)
1382             x (nnmaildir--grp-nlist x)
1383             x (cdar x)
1384             nnmaildir--file (concat nnmaildir--file
1385                                     (nnmaildir--art-prefix x)
1386                                     (nnmaildir--art-suffix x)))
1387       (delq nil
1388             (mapcar
1389              (lambda (ga)
1390                (setq gname (car ga))
1391                (and (or (intern-soft gname groups)
1392                         (nnmaildir-request-create-group gname))
1393                     (nnmaildir-request-accept-article gname)
1394                     ga))
1395              group-art)))))
1396
1397 (defun nnmaildir-active-number (gname)
1398   0)
1399
1400 (defun nnmaildir-request-expire-articles (ranges &optional gname server force)
1401   (let ((no-force (not force))
1402         (group (nnmaildir--prepare server gname))
1403         pgname time boundary bound-iter high low target dir nlist nlist2
1404         stop article didnt nnmaildir--file nnmaildir-article-file-name
1405         deactivate-mark)
1406     (catch 'return
1407       (unless group
1408         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1409               (if gname (concat "No such group: " gname) "No current group"))
1410         (throw 'return (gnus-uncompress-range ranges)))
1411       (setq gname (nnmaildir--grp-name group)
1412             pgname (nnmaildir--pgname nnmaildir--cur-server gname))
1413       (if (nnmaildir--param pgname 'read-only)
1414           (throw 'return (gnus-uncompress-range ranges)))
1415       (setq time (nnmaildir--param pgname 'expire-age))
1416       (unless time
1417         (setq time (or (and nnmail-expiry-wait-function
1418                             (funcall nnmail-expiry-wait-function gname))
1419                        nnmail-expiry-wait))
1420         (if (eq time 'immediate)
1421             (setq time 0)
1422           (if (numberp time)
1423               (setq time (* time 86400)))))
1424       (when no-force
1425         (unless (integerp time) ;; handle 'never
1426           (throw 'return (gnus-uncompress-range ranges)))
1427         (setq boundary (current-time)
1428               high (- (car boundary) (/ time 65536))
1429               low (- (cadr boundary) (% time 65536)))
1430         (if (< low 0)
1431             (setq low (+ low 65536)
1432                   high (1- high)))
1433         (setcar (cdr boundary) low)
1434         (setcar boundary high))
1435       (setq dir (nnmaildir--srv-dir nnmaildir--cur-server)
1436             dir (nnmaildir--srvgrp-dir dir gname)
1437             dir (nnmaildir--cur dir)
1438             nlist (nnmaildir--grp-nlist group)
1439             ranges (reverse ranges))
1440       (nnmaildir--with-move-buffer
1441         (nnmaildir--nlist-iterate
1442          nlist ranges
1443          (lambda (article)
1444            (setq nnmaildir--file (nnmaildir--art-prefix article)
1445                  nnmaildir--file (concat dir nnmaildir--file
1446                                          (nnmaildir--art-suffix article))
1447                  time (file-attributes nnmaildir--file))
1448            (cond
1449             ((null time)
1450              (nnmaildir--expired-article group article))
1451             ((and no-force
1452                   (progn
1453                     (setq time (nth 5 time)
1454                           bound-iter boundary)
1455                     (while (and bound-iter time
1456                                 (= (car bound-iter) (car time)))
1457                       (setq bound-iter (cdr bound-iter)
1458                             time (cdr time)))
1459                     (and bound-iter time
1460                          (car-less-than-car bound-iter time))))
1461              (setq didnt (cons (nnmaildir--art-num article) didnt)))
1462             (t
1463              (setq nnmaildir-article-file-name nnmaildir--file
1464                    target (if force nil
1465                             (save-excursion
1466                               (save-restriction
1467                                 (nnmaildir--param pgname 'expire-group)))))
1468              (when (and (stringp target)
1469                         (not (string-equal target pgname))) ;; Move it.
1470                (erase-buffer)
1471                (nnheader-insert-file-contents nnmaildir--file)
1472                (gnus-request-accept-article target nil nil 'no-encode))
1473              (if (equal target pgname)
1474                  ;; Leave it here.
1475                  (setq didnt (cons (nnmaildir--art-num article) didnt))
1476                (nnmaildir--unlink nnmaildir--file)
1477                (nnmaildir--expired-article group article))))))
1478         (erase-buffer))
1479       didnt)))
1480
1481 (defun nnmaildir-request-set-mark (gname actions &optional server)
1482   (let ((group (nnmaildir--prepare server gname))
1483         (coding-system-for-write nnheader-file-coding-system)
1484         (buffer-file-coding-system nil)
1485         (file-coding-system-alist nil)
1486         del-mark del-action add-action set-action marksdir markfile nlist
1487         ranges begin end article all-marks todo-marks did-marks mdir mfile
1488         pgname ls permarkfile deactivate-mark)
1489     (setq del-mark
1490           (lambda (mark)
1491             (setq mfile (nnmaildir--subdir marksdir (symbol-name mark))
1492                   mfile (concat mfile (nnmaildir--art-prefix article)))
1493             (nnmaildir--unlink mfile))
1494           del-action (lambda (article) (mapcar del-mark todo-marks))
1495           add-action
1496           (lambda (article)
1497             (mapcar
1498              (lambda (mark)
1499                (setq mdir (nnmaildir--subdir marksdir (symbol-name mark))
1500                      permarkfile (concat mdir ":")
1501                      mfile (concat mdir (nnmaildir--art-prefix article)))
1502                (unless (memq mark did-marks)
1503                  (setq did-marks (cons mark did-marks))
1504                  (nnmaildir--mkdir mdir)
1505                  (unless (file-attributes permarkfile)
1506                    (condition-case nil
1507                        (add-name-to-file markfile permarkfile)
1508                      (file-error
1509                       ;; AFS can't make hard links in separate directories
1510                       (write-region "" nil permarkfile nil 'no-message)))))
1511                (unless (file-exists-p mfile)
1512                  (add-name-to-file permarkfile mfile)))
1513              todo-marks))
1514           set-action (lambda (article)
1515                        (funcall add-action)
1516                        (mapcar (lambda (mark)
1517                                  (unless (memq mark todo-marks)
1518                                    (funcall del-mark mark)))
1519                                all-marks)))
1520     (catch 'return
1521       (unless group
1522         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1523               (concat "No such group: " gname))
1524         (mapcar (lambda (action)
1525                   (setq ranges (gnus-range-add ranges (car action))))
1526                 actions)
1527         (throw 'return ranges))
1528       (setq nlist (nnmaildir--grp-nlist group)
1529             marksdir (nnmaildir--srv-dir nnmaildir--cur-server)
1530             marksdir (nnmaildir--srvgrp-dir marksdir gname)
1531             marksdir (nnmaildir--nndir marksdir)
1532             markfile (concat marksdir "markfile")
1533             marksdir (nnmaildir--marks-dir marksdir)
1534             gname (nnmaildir--grp-name group)
1535             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1536             ls (nnmaildir--group-ls nnmaildir--cur-server pgname)
1537             all-marks (funcall ls marksdir nil "\\`[^.]" 'nosort)
1538             all-marks (mapcar 'intern all-marks))
1539       (mapcar
1540        (lambda (action)
1541          (setq ranges (car action)
1542                todo-marks (caddr action))
1543          (mapcar (lambda (mark) (add-to-list 'all-marks mark)) todo-marks)
1544          (if (numberp (cdr ranges)) (setq ranges (list ranges)))
1545          (nnmaildir--nlist-iterate nlist ranges
1546                                    (cond ((eq 'del (cadr action)) del-action)
1547                                          ((eq 'add (cadr action)) add-action)
1548                                          (t set-action))))
1549        actions)
1550       nil)))
1551
1552 (defun nnmaildir-close-group (gname &optional server)
1553   (let ((group (nnmaildir--prepare server gname))
1554         pgname ls dir msgdir files flist dirs)
1555     (if (null group)
1556         (progn
1557           (setf (nnmaildir--srv-error nnmaildir--cur-server)
1558                 (concat "No such group: " gname))
1559           nil)
1560       (setq pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1561             ls (nnmaildir--group-ls nnmaildir--cur-server pgname)
1562             dir (nnmaildir--srv-dir nnmaildir--cur-server)
1563             dir (nnmaildir--srvgrp-dir dir gname)
1564             msgdir (if (nnmaildir--param pgname 'read-only)
1565                        (nnmaildir--new dir) (nnmaildir--cur dir))
1566             dir (nnmaildir--nndir dir)
1567             dirs (cons (nnmaildir--nov-dir dir)
1568                        (funcall ls (nnmaildir--marks-dir dir) 'full "\\`[^.]"
1569                                 'nosort))
1570             dirs (mapcar
1571                   (lambda (dir)
1572                     (cons dir (funcall ls dir nil "\\`[^.]" 'nosort)))
1573                   dirs)
1574             files (funcall ls msgdir nil "\\`[^.]" 'nosort)
1575             flist (nnmaildir--up2-1 (length files))
1576             flist (make-vector flist 0))
1577       (save-match-data
1578         (mapcar
1579          (lambda (file)
1580            (string-match "\\`\\([^:]*\\)\\(:.*\\)?\\'" file)
1581            (intern (match-string 1 file) flist))
1582          files))
1583       (mapcar
1584        (lambda (dir)
1585          (setq files (cdr dir)
1586                dir (file-name-as-directory (car dir)))
1587          (mapcar
1588           (lambda (file)
1589             (unless (or (intern-soft file flist) (string= file ":"))
1590               (setq file (concat dir file))
1591               (delete-file file)))
1592           files))
1593        dirs)
1594       t)))
1595
1596 (defun nnmaildir-close-server (&optional server)
1597   (let (flist ls dirs dir files file x)
1598     (nnmaildir--prepare server nil)
1599     (when nnmaildir--cur-server
1600       (setq server nnmaildir--cur-server
1601             nnmaildir--cur-server nil)
1602       (unintern (nnmaildir--srv-address server) nnmaildir--servers)))
1603   t)
1604
1605 (defun nnmaildir-request-close ()
1606   (let (servers buffer)
1607     (mapatoms (lambda (server)
1608                 (setq servers (cons (symbol-name server) servers)))
1609               nnmaildir--servers)
1610     (mapcar 'nnmaildir-close-server servers)
1611     (setq buffer (get-buffer " *nnmaildir work*"))
1612     (if buffer (kill-buffer buffer))
1613     (setq buffer (get-buffer " *nnmaildir nov*"))
1614     (if buffer (kill-buffer buffer))
1615     (setq buffer (get-buffer " *nnmaildir move*"))
1616     (if buffer (kill-buffer buffer)))
1617   t)
1618
1619 (provide 'nnmaildir)
1620
1621 ;; Local Variables:
1622 ;; indent-tabs-mode: t
1623 ;; fill-column: 77
1624 ;; End:
1625
1626 ;;; arch-tag: 0c4e44cd-dfde-4040-888e-5597ec771849
1627 ;;; nnmaildir.el ends here