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1 ;;; gnus-cache.el --- cache interface for Gnus
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2 ;; Copyright (C) 1995,96 Free Software Foundation, Inc.
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3
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4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
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5 ;; Keywords: news
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6
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7 ;; This file is part of GNU Emacs.
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8
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9 ;; GNU Emacs is free software; you can redistribute it and/or modify
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10 ;; it under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; GNU Emacs is distributed in the hope that it will be useful,
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15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ;; GNU General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 ;; Boston, MA 02111-1307, USA.
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23
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24 ;;; Commentary:
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25
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26 ;;; Code:
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27
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28 (require 'gnus)
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29 (eval-when-compile (require 'cl))
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30
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31 (defvar gnus-cache-directory
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32 (nnheader-concat gnus-directory "cache/")
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33 "*The directory where cached articles will be stored.")
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34
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35 (defvar gnus-cache-active-file
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36 (concat (file-name-as-directory gnus-cache-directory) "active")
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37 "*The cache active file.")
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38
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39 (defvar gnus-cache-enter-articles '(ticked dormant)
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40 "*Classes of articles to enter into the cache.")
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41
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42 (defvar gnus-cache-remove-articles '(read)
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43 "*Classes of articles to remove from the cache.")
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44
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45 (defvar gnus-uncacheable-groups nil
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46 "*Groups that match this regexp will not be cached.
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47
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48 If you want to avoid caching your nnml groups, you could set this
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49 variable to \"^nnml\".")
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50
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51
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52
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53 ;;; Internal variables.
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54
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55 (defvar gnus-cache-buffer nil)
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56 (defvar gnus-cache-active-hashtb nil)
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57 (defvar gnus-cache-active-altered nil)
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58
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59 (eval-and-compile
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60 (autoload 'nnml-generate-nov-databases-1 "nnml")
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61 (autoload 'nnvirtual-find-group-art "nnvirtual"))
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62
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63
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64
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65 ;;; Functions called from Gnus.
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66
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67 (defun gnus-cache-open ()
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68 "Initialize the cache."
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2
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69 (when (or (file-exists-p gnus-cache-directory)
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70 (and gnus-use-cache
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71 (not (eq gnus-use-cache 'passive))))
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72 (gnus-cache-read-active)))
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0
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73
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2
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74 (condition-case ()
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75 (gnus-add-shutdown 'gnus-cache-close 'gnus)
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76 ;; Complexities of byte-compiling makes this kludge necessary. Eeek.
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77 (error nil))
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0
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78
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79 (defun gnus-cache-close ()
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80 "Shut down the cache."
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81 (gnus-cache-write-active)
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82 (gnus-cache-save-buffers)
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83 (setq gnus-cache-active-hashtb nil))
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84
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85 (defun gnus-cache-save-buffers ()
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86 ;; save the overview buffer if it exists and has been modified
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87 ;; delete empty cache subdirectories
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88 (if (null gnus-cache-buffer)
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89 ()
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90 (let ((buffer (cdr gnus-cache-buffer))
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91 (overview-file (gnus-cache-file-name
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92 (car gnus-cache-buffer) ".overview")))
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93 ;; write the overview only if it was modified
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94 (if (buffer-modified-p buffer)
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95 (save-excursion
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96 (set-buffer buffer)
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97 (if (> (buffer-size) 0)
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98 ;; non-empty overview, write it out
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99 (progn
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100 (gnus-make-directory (file-name-directory overview-file))
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101 (write-region (point-min) (point-max)
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102 overview-file nil 'quietly))
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103 ;; empty overview file, remove it
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104 (and (file-exists-p overview-file)
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105 (delete-file overview-file))
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106 ;; if possible, remove group's cache subdirectory
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107 (condition-case nil
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108 ;; FIXME: we can detect the error type and warn the user
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109 ;; of any inconsistencies (articles w/o nov entries?).
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110 ;; for now, just be conservative...delete only if safe -- sj
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111 (delete-directory (file-name-directory overview-file))
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112 (error nil)))))
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113 ;; kill the buffer, it's either unmodified or saved
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114 (gnus-kill-buffer buffer)
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115 (setq gnus-cache-buffer nil))))
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116
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117 (defun gnus-cache-possibly-enter-article
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118 (group article headers ticked dormant unread &optional force)
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119 (when (and (or force (not (eq gnus-use-cache 'passive)))
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120 (numberp article)
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121 (> article 0)
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122 (vectorp headers)) ; This might be a dummy article.
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123 ;; If this is a virtual group, we find the real group.
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124 (when (gnus-virtual-group-p group)
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125 (let ((result (nnvirtual-find-group-art
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126 (gnus-group-real-name group) article)))
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127 (setq group (car result)
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128 headers (copy-sequence headers))
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129 (mail-header-set-number headers (cdr result))))
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130 (let ((number (mail-header-number headers))
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131 file dir)
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132 (when (and (> number 0) ; Reffed article.
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133 (or (not gnus-uncacheable-groups)
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134 (not (string-match gnus-uncacheable-groups group)))
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135 (or force
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136 (gnus-cache-member-of-class
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137 gnus-cache-enter-articles ticked dormant unread))
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138 (not (file-exists-p (setq file (gnus-cache-file-name
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139 group number)))))
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140 ;; Possibly create the cache directory.
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141 (or (file-exists-p (setq dir (file-name-directory file)))
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142 (gnus-make-directory dir))
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143 ;; Save the article in the cache.
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144 (if (file-exists-p file)
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145 t ; The article already is saved.
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146 (save-excursion
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147 (set-buffer nntp-server-buffer)
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148 (let ((gnus-use-cache nil))
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149 (gnus-request-article-this-buffer number group))
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150 (when (> (buffer-size) 0)
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151 (write-region (point-min) (point-max) file nil 'quiet)
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152 (gnus-cache-change-buffer group)
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153 (set-buffer (cdr gnus-cache-buffer))
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154 (goto-char (point-max))
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155 (forward-line -1)
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156 (while (condition-case ()
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157 (and (not (bobp))
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158 (> (read (current-buffer)) number))
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159 (error
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160 ;; The line was malformed, so we just remove it!!
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161 (gnus-delete-line)
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162 t))
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163 (forward-line -1))
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164 (if (bobp)
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165 (if (not (eobp))
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166 (progn
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167 (beginning-of-line)
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168 (if (< (read (current-buffer)) number)
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169 (forward-line 1)))
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170 (beginning-of-line))
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171 (forward-line 1))
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172 (beginning-of-line)
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173 ;; [number subject from date id references chars lines xref]
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174 (insert (format "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t\n"
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175 (mail-header-number headers)
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176 (mail-header-subject headers)
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177 (mail-header-from headers)
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178 (mail-header-date headers)
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179 (mail-header-id headers)
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180 (or (mail-header-references headers) "")
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181 (or (mail-header-chars headers) "")
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182 (or (mail-header-lines headers) "")
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183 (or (mail-header-xref headers) "")))
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184 ;; Update the active info.
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185 (set-buffer gnus-summary-buffer)
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186 (gnus-cache-update-active group number)
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187 (push article gnus-newsgroup-cached)
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188 (gnus-summary-update-secondary-mark article))
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189 t))))))
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190
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191 (defun gnus-cache-enter-remove-article (article)
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192 "Mark ARTICLE for later possible removal."
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193 (when article
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194 (push article gnus-cache-removable-articles)))
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195
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196 (defun gnus-cache-possibly-remove-articles ()
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197 "Possibly remove some of the removable articles."
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198 (if (not (gnus-virtual-group-p gnus-newsgroup-name))
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199 (gnus-cache-possibly-remove-articles-1)
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200 (let ((arts gnus-cache-removable-articles)
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201 ga)
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202 (while arts
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203 (when (setq ga (nnvirtual-find-group-art
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204 (gnus-group-real-name gnus-newsgroup-name) (pop arts)))
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205 (let ((gnus-cache-removable-articles (list (cdr ga)))
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206 (gnus-newsgroup-name (car ga)))
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207 (gnus-cache-possibly-remove-articles-1)))))
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208 (setq gnus-cache-removable-articles nil)))
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209
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210 (defun gnus-cache-possibly-remove-articles-1 ()
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211 "Possibly remove some of the removable articles."
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212 (unless (eq gnus-use-cache 'passive)
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213 (let ((articles gnus-cache-removable-articles)
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214 (cache-articles gnus-newsgroup-cached)
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215 article)
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216 (gnus-cache-change-buffer gnus-newsgroup-name)
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217 (while articles
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218 (if (memq (setq article (pop articles)) cache-articles)
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219 ;; The article was in the cache, so we see whether we are
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220 ;; supposed to remove it from the cache.
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221 (gnus-cache-possibly-remove-article
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222 article (memq article gnus-newsgroup-marked)
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223 (memq article gnus-newsgroup-dormant)
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224 (or (memq article gnus-newsgroup-unreads)
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225 (memq article gnus-newsgroup-unselected))))))
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226 ;; The overview file might have been modified, save it
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227 ;; safe because we're only called at group exit anyway.
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228 (gnus-cache-save-buffers)))
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229
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230 (defun gnus-cache-request-article (article group)
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231 "Retrieve ARTICLE in GROUP from the cache."
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232 (let ((file (gnus-cache-file-name group article))
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233 (buffer-read-only nil))
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234 (when (file-exists-p file)
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235 (erase-buffer)
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236 (gnus-kill-all-overlays)
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237 (insert-file-contents file)
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238 t)))
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239
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240 (defun gnus-cache-possibly-alter-active (group active)
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241 "Alter the ACTIVE info for GROUP to reflect the articles in the cache."
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2
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242 (when gnus-cache-active-hashtb
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243 (let ((cache-active (gnus-gethash group gnus-cache-active-hashtb)))
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244 (and cache-active
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245 (< (car cache-active) (car active))
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246 (setcar active (car cache-active)))
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247 (and cache-active
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248 (> (cdr cache-active) (cdr active))
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249 (setcdr active (cdr cache-active))))))
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250
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251 (defun gnus-cache-retrieve-headers (articles group &optional fetch-old)
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252 "Retrieve the headers for ARTICLES in GROUP."
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253 (let ((cached
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254 (setq gnus-newsgroup-cached (gnus-cache-articles-in-group group))))
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255 (if (not cached)
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256 ;; No cached articles here, so we just retrieve them
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257 ;; the normal way.
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258 (let ((gnus-use-cache nil))
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259 (gnus-retrieve-headers articles group fetch-old))
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260 (let ((uncached-articles (gnus-sorted-intersection
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261 (gnus-sorted-complement articles cached)
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262 articles))
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263 (cache-file (gnus-cache-file-name group ".overview"))
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264 type)
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265 ;; We first retrieve all the headers that we don't have in
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266 ;; the cache.
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267 (let ((gnus-use-cache nil))
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268 (when uncached-articles
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269 (setq type (and articles
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270 (gnus-retrieve-headers
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271 uncached-articles group fetch-old)))))
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272 (gnus-cache-save-buffers)
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273 ;; Then we insert the cached headers.
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274 (save-excursion
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275 (cond
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276 ((not (file-exists-p cache-file))
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277 ;; There are no cached headers.
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278 type)
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279 ((null type)
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280 ;; There were no uncached headers (or retrieval was
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281 ;; unsuccessful), so we use the cached headers exclusively.
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282 (set-buffer nntp-server-buffer)
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283 (erase-buffer)
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284 (insert-file-contents cache-file)
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285 'nov)
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286 ((eq type 'nov)
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287 ;; We have both cached and uncached NOV headers, so we
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288 ;; braid them.
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289 (gnus-cache-braid-nov group cached)
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290 type)
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291 (t
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292 ;; We braid HEADs.
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293 (gnus-cache-braid-heads group (gnus-sorted-intersection
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294 cached articles))
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295 type)))))))
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296
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297 (defun gnus-cache-enter-article (&optional n)
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298 "Enter the next N articles into the cache.
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299 If not given a prefix, use the process marked articles instead.
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300 Returns the list of articles entered."
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301 (interactive "P")
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302 (gnus-set-global-variables)
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303 (let ((articles (gnus-summary-work-articles n))
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304 article out)
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305 (while articles
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306 (setq article (pop articles))
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307 (when (gnus-cache-possibly-enter-article
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308 gnus-newsgroup-name article (gnus-summary-article-header article)
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309 nil nil nil t)
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310 (push article out))
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311 (gnus-summary-remove-process-mark article)
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312 (gnus-summary-update-secondary-mark article))
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313 (gnus-summary-next-subject 1)
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314 (gnus-summary-position-point)
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315 (nreverse out)))
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316
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317 (defun gnus-cache-remove-article (n)
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318 "Remove the next N articles from the cache.
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319 If not given a prefix, use the process marked articles instead.
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320 Returns the list of articles removed."
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321 (interactive "P")
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322 (gnus-set-global-variables)
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323 (gnus-cache-change-buffer gnus-newsgroup-name)
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324 (let ((articles (gnus-summary-work-articles n))
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325 article out)
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326 (while articles
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327 (setq article (pop articles))
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328 (when (gnus-cache-possibly-remove-article article nil nil nil t)
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329 (push article out))
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330 (gnus-summary-remove-process-mark article)
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331 (gnus-summary-update-secondary-mark article))
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332 (gnus-summary-next-subject 1)
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333 (gnus-summary-position-point)
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334 (nreverse out)))
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335
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336 (defun gnus-cached-article-p (article)
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337 "Say whether ARTICLE is cached in the current group."
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338 (memq article gnus-newsgroup-cached))
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339
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340 ;;; Internal functions.
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341
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342 (defun gnus-cache-change-buffer (group)
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343 (and gnus-cache-buffer
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344 ;; See if the current group's overview cache has been loaded.
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345 (or (string= group (car gnus-cache-buffer))
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346 ;; Another overview cache is current, save it.
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347 (gnus-cache-save-buffers)))
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348 ;; if gnus-cache buffer is nil, create it
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349 (or gnus-cache-buffer
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350 ;; Create cache buffer
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351 (save-excursion
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352 (setq gnus-cache-buffer
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353 (cons group
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354 (set-buffer (get-buffer-create " *gnus-cache-overview*"))))
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355 (buffer-disable-undo (current-buffer))
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356 ;; Insert the contents of this group's cache overview.
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357 (erase-buffer)
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358 (let ((file (gnus-cache-file-name group ".overview")))
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359 (and (file-exists-p file)
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360 (insert-file-contents file)))
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361 ;; We have a fresh (empty/just loaded) buffer,
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362 ;; mark it as unmodified to save a redundant write later.
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363 (set-buffer-modified-p nil))))
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364
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365 ;; Return whether an article is a member of a class.
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366 (defun gnus-cache-member-of-class (class ticked dormant unread)
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367 (or (and ticked (memq 'ticked class))
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368 (and dormant (memq 'dormant class))
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369 (and unread (memq 'unread class))
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370 (and (not unread) (not ticked) (not dormant) (memq 'read class))))
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371
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372 (defun gnus-cache-file-name (group article)
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373 (concat (file-name-as-directory gnus-cache-directory)
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374 (file-name-as-directory
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375 (if (gnus-use-long-file-name 'not-cache)
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376 group
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2
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377 (let ((group (nnheader-replace-chars-in-string group ?/ ?_)))
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378 ;; Translate the first colon into a slash.
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379 (when (string-match ":" group)
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380 (aset group (match-beginning 0) ?/))
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0
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381 (nnheader-replace-chars-in-string group ?. ?/))))
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382 (if (stringp article) article (int-to-string article))))
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383
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384 (defun gnus-cache-update-article (group article)
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385 "If ARTICLE is in the cache, remove it and re-enter it."
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386 (when (gnus-cache-possibly-remove-article article nil nil nil t)
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387 (let ((gnus-use-cache nil))
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388 (gnus-cache-possibly-enter-article
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389 gnus-newsgroup-name article (gnus-summary-article-header article)
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390 nil nil nil t))))
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391
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392 (defun gnus-cache-possibly-remove-article (article ticked dormant unread
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393 &optional force)
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394 "Possibly remove ARTICLE from the cache."
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395 (let ((group gnus-newsgroup-name)
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396 (number article)
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397 file)
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398 ;; If this is a virtual group, we find the real group.
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399 (when (gnus-virtual-group-p group)
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400 (let ((result (nnvirtual-find-group-art
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401 (gnus-group-real-name group) article)))
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402 (setq group (car result)
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403 number (cdr result))))
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404 (setq file (gnus-cache-file-name group number))
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405 (when (and (file-exists-p file)
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406 (or force
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407 (gnus-cache-member-of-class
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408 gnus-cache-remove-articles ticked dormant unread)))
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409 (save-excursion
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410 (delete-file file)
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411 (set-buffer (cdr gnus-cache-buffer))
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412 (goto-char (point-min))
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413 (if (or (looking-at (concat (int-to-string number) "\t"))
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414 (search-forward (concat "\n" (int-to-string number) "\t")
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415 (point-max) t))
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416 (delete-region (progn (beginning-of-line) (point))
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417 (progn (forward-line 1) (point)))))
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418 (setq gnus-newsgroup-cached
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419 (delq article gnus-newsgroup-cached))
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420 (gnus-summary-update-secondary-mark article)
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421 t)))
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422
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423 (defun gnus-cache-articles-in-group (group)
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424 "Return a sorted list of cached articles in GROUP."
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425 (let ((dir (file-name-directory (gnus-cache-file-name group 1)))
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426 articles)
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427 (when (file-exists-p dir)
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428 (sort (mapcar (lambda (name) (string-to-int name))
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429 (directory-files dir nil "^[0-9]+$" t))
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430 '<))))
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431
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432 (defun gnus-cache-braid-nov (group cached)
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433 (let ((cache-buf (get-buffer-create " *gnus-cache*"))
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434 beg end)
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435 (gnus-cache-save-buffers)
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436 (save-excursion
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437 (set-buffer cache-buf)
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438 (buffer-disable-undo (current-buffer))
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439 (erase-buffer)
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440 (insert-file-contents (gnus-cache-file-name group ".overview"))
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441 (goto-char (point-min))
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442 (insert "\n")
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443 (goto-char (point-min)))
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444 (set-buffer nntp-server-buffer)
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445 (goto-char (point-min))
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446 (while cached
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447 (while (and (not (eobp))
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448 (< (read (current-buffer)) (car cached)))
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449 (forward-line 1))
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450 (beginning-of-line)
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451 (save-excursion
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452 (set-buffer cache-buf)
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453 (if (search-forward (concat "\n" (int-to-string (car cached)) "\t")
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454 nil t)
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455 (setq beg (progn (beginning-of-line) (point))
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456 end (progn (end-of-line) (point)))
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457 (setq beg nil)))
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458 (if beg (progn (insert-buffer-substring cache-buf beg end)
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459 (insert "\n")))
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460 (setq cached (cdr cached)))
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461 (kill-buffer cache-buf)))
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462
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463 (defun gnus-cache-braid-heads (group cached)
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464 (let ((cache-buf (get-buffer-create " *gnus-cache*")))
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465 (save-excursion
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466 (set-buffer cache-buf)
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467 (buffer-disable-undo (current-buffer))
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468 (erase-buffer))
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469 (set-buffer nntp-server-buffer)
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470 (goto-char (point-min))
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|
|
471 (while cached
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472 (while (and (not (eobp))
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473 (looking-at "2.. +\\([0-9]+\\) ")
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474 (< (progn (goto-char (match-beginning 1))
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475 (read (current-buffer)))
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|
|
476 (car cached)))
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477 (search-forward "\n.\n" nil 'move))
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478 (beginning-of-line)
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|
479 (save-excursion
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480 (set-buffer cache-buf)
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|
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481 (erase-buffer)
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|
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482 (insert-file-contents (gnus-cache-file-name group (car cached)))
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|
|
483 (goto-char (point-min))
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|
|
484 (insert "220 ")
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|
|
485 (princ (car cached) (current-buffer))
|
|
|
486 (insert " Article retrieved.\n")
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|
|
487 (search-forward "\n\n" nil 'move)
|
|
|
488 (delete-region (point) (point-max))
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|
|
489 (forward-char -1)
|
|
|
490 (insert "."))
|
|
|
491 (insert-buffer-substring cache-buf)
|
|
|
492 (setq cached (cdr cached)))
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|
|
493 (kill-buffer cache-buf)))
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494
|
|
|
495 ;;;###autoload
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|
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496 (defun gnus-jog-cache ()
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|
|
497 "Go through all groups and put the articles into the cache."
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|
|
498 (interactive)
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|
|
499 (let ((gnus-mark-article-hook nil)
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|
|
500 (gnus-expert-user t)
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|
|
501 (nnmail-spool-file nil)
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|
|
502 (gnus-use-dribble-file nil)
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|
|
503 (gnus-novice-user nil)
|
|
|
504 (gnus-large-newsgroup nil))
|
|
|
505 ;; Start Gnus.
|
|
|
506 (gnus)
|
|
|
507 ;; Go through all groups...
|
|
|
508 (gnus-group-mark-buffer)
|
|
|
509 (gnus-group-universal-argument
|
|
|
510 nil nil
|
|
|
511 (lambda ()
|
|
|
512 (gnus-summary-read-group nil nil t)
|
|
|
513 ;; ... and enter the articles into the cache.
|
|
|
514 (when (eq major-mode 'gnus-summary-mode)
|
|
|
515 (gnus-uu-mark-buffer)
|
|
|
516 (gnus-cache-enter-article)
|
|
|
517 (kill-buffer (current-buffer)))))))
|
|
|
518
|
|
|
519 (defun gnus-cache-read-active (&optional force)
|
|
|
520 "Read the cache active file."
|
|
|
521 (unless (file-exists-p gnus-cache-directory)
|
|
|
522 (make-directory gnus-cache-directory t))
|
|
|
523 (if (not (and (file-exists-p gnus-cache-active-file)
|
|
|
524 (or force (not gnus-cache-active-hashtb))))
|
|
|
525 ;; There is no active file, so we generate one.
|
|
|
526 (gnus-cache-generate-active)
|
|
|
527 ;; We simply read the active file.
|
|
|
528 (save-excursion
|
|
|
529 (gnus-set-work-buffer)
|
|
|
530 (insert-file-contents gnus-cache-active-file)
|
|
|
531 (gnus-active-to-gnus-format
|
|
|
532 nil (setq gnus-cache-active-hashtb
|
|
|
533 (gnus-make-hashtable
|
|
|
534 (count-lines (point-min) (point-max)))))
|
|
|
535 (setq gnus-cache-active-altered nil))))
|
|
|
536
|
|
|
537 (defun gnus-cache-write-active (&optional force)
|
|
|
538 "Write the active hashtb to the active file."
|
|
|
539 (when (or force
|
|
|
540 (and gnus-cache-active-hashtb
|
|
|
541 gnus-cache-active-altered))
|
|
|
542 (save-excursion
|
|
|
543 (gnus-set-work-buffer)
|
|
|
544 (mapatoms
|
|
|
545 (lambda (sym)
|
|
|
546 (when (and sym (boundp sym))
|
|
|
547 (insert (format "%s %d %d y\n"
|
|
|
548 (symbol-name sym) (cdr (symbol-value sym))
|
|
|
549 (car (symbol-value sym))))))
|
|
|
550 gnus-cache-active-hashtb)
|
|
|
551 (gnus-make-directory (file-name-directory gnus-cache-active-file))
|
|
|
552 (write-region
|
|
|
553 (point-min) (point-max) gnus-cache-active-file nil 'silent))
|
|
|
554 ;; Mark the active hashtb as unaltered.
|
|
|
555 (setq gnus-cache-active-altered nil)))
|
|
|
556
|
|
|
557 (defun gnus-cache-update-active (group number &optional low)
|
|
|
558 "Update the upper bound of the active info of GROUP to NUMBER.
|
|
|
559 If LOW, update the lower bound instead."
|
|
|
560 (let ((active (gnus-gethash group gnus-cache-active-hashtb)))
|
|
|
561 (if (null active)
|
|
|
562 ;; We just create a new active entry for this group.
|
|
|
563 (gnus-sethash group (cons number number) gnus-cache-active-hashtb)
|
|
|
564 ;; Update the lower or upper bound.
|
|
|
565 (if low
|
|
|
566 (setcar active number)
|
|
|
567 (setcdr active number))
|
|
|
568 ;; Mark the active hashtb as altered.
|
|
|
569 (setq gnus-cache-active-altered t))))
|
|
|
570
|
|
|
571 ;;;###autoload
|
|
|
572 (defun gnus-cache-generate-active (&optional directory)
|
|
|
573 "Generate the cache active file."
|
|
|
574 (interactive)
|
|
|
575 (let* ((top (null directory))
|
|
|
576 (directory (expand-file-name (or directory gnus-cache-directory)))
|
|
|
577 (files (directory-files directory 'full))
|
|
|
578 (group
|
|
|
579 (if top
|
|
|
580 ""
|
|
|
581 (string-match
|
|
|
582 (concat "^" (file-name-as-directory
|
|
|
583 (expand-file-name gnus-cache-directory)))
|
|
|
584 (directory-file-name directory))
|
|
|
585 (nnheader-replace-chars-in-string
|
|
|
586 (substring (directory-file-name directory) (match-end 0))
|
|
|
587 ?/ ?.)))
|
|
|
588 nums alphs)
|
|
|
589 (when top
|
|
|
590 (gnus-message 5 "Generating the cache active file...")
|
|
|
591 (setq gnus-cache-active-hashtb (gnus-make-hashtable 123)))
|
|
|
592 ;; Separate articles from all other files and directories.
|
|
|
593 (while files
|
|
|
594 (if (string-match "^[0-9]+$" (file-name-nondirectory (car files)))
|
|
|
595 (push (string-to-int (file-name-nondirectory (pop files))) nums)
|
|
|
596 (push (pop files) alphs)))
|
|
|
597 ;; If we have nums, then this is probably a valid group.
|
|
|
598 (when (setq nums (sort nums '<))
|
|
|
599 (gnus-sethash group (cons (car nums) (gnus-last-element nums))
|
|
|
600 gnus-cache-active-hashtb))
|
|
|
601 ;; Go through all the other files.
|
|
|
602 (while alphs
|
|
|
603 (when (and (file-directory-p (car alphs))
|
|
|
604 (not (string-match "^\\.\\.?$"
|
|
|
605 (file-name-nondirectory (car alphs)))))
|
|
|
606 ;; We descend directories.
|
|
|
607 (gnus-cache-generate-active (car alphs)))
|
|
|
608 (setq alphs (cdr alphs)))
|
|
|
609 ;; Write the new active file.
|
|
|
610 (when top
|
|
|
611 (gnus-cache-write-active t)
|
|
|
612 (gnus-message 5 "Generating the cache active file...done"))))
|
|
|
613
|
|
|
614 ;;;###autoload
|
|
|
615 (defun gnus-cache-generate-nov-databases (dir)
|
|
|
616 "Generate NOV files recursively starting in DIR."
|
|
|
617 (interactive (list gnus-cache-directory))
|
|
|
618 (gnus-cache-close)
|
|
|
619 (let ((nnml-generate-active-function 'identity))
|
|
|
620 (nnml-generate-nov-databases-1 dir)))
|
|
|
621
|
|
|
622 (provide 'gnus-cache)
|
|
|
623
|
|
|
624 ;;; gnus-cache.el ends here
|
