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1 ;;; nnmh.el --- mhspool access for Gnus
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2 ;; Copyright (C) 1995,96,97 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 ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
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6 ;; Keywords: news, mail
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7
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8 ;; This file is part of GNU Emacs.
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9
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10 ;; GNU Emacs is free software; you can redistribute it and/or modify
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11 ;; it under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; GNU Emacs is distributed in the hope that it will be useful,
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16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ;; GNU General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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23 ;; Boston, MA 02111-1307, USA.
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24
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25 ;;; Commentary:
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26
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27 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
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28 ;; For an overview of what the interface functions do, please see the
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29 ;; Gnus sources.
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30
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31 ;;; Code:
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32
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33 (require 'nnheader)
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34 (require 'nnmail)
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35 (require 'gnus-start)
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36 (require 'nnoo)
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37 (require 'cl)
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38
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39 (nnoo-declare nnmh)
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40
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41 (defvoo nnmh-directory message-directory
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42 "*Mail spool directory.")
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43
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44 (defvoo nnmh-get-new-mail t
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45 "*If non-nil, nnmh will check the incoming mail file and split the mail.")
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46
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47 (defvoo nnmh-prepare-save-mail-hook nil
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48 "*Hook run narrowed to an article before saving.")
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49
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50 (defvoo nnmh-be-safe nil
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51 "*If non-nil, nnmh will check all articles to make sure whether they are new or not.")
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52
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53
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54
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55 (defconst nnmh-version "nnmh 1.0"
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56 "nnmh version.")
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57
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58 (defvoo nnmh-current-directory nil
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59 "Current news group directory.")
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60
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61 (defvoo nnmh-status-string "")
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62 (defvoo nnmh-group-alist nil)
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63
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64
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65
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66 ;;; Interface functions.
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67
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68 (nnoo-define-basics nnmh)
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69
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70 (deffoo nnmh-retrieve-headers (articles &optional newsgroup server fetch-old)
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71 (save-excursion
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72 (set-buffer nntp-server-buffer)
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73 (erase-buffer)
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74 (let* ((file nil)
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75 (number (length articles))
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76 (large (and (numberp nnmail-large-newsgroup)
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77 (> number nnmail-large-newsgroup)))
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78 (count 0)
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79 beg article)
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80 (nnmh-possibly-change-directory newsgroup server)
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81 ;; We don't support fetching by Message-ID.
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82 (if (stringp (car articles))
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83 'headers
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84 (while articles
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85 (when (and (file-exists-p
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86 (setq file (concat (file-name-as-directory
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87 nnmh-current-directory)
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88 (int-to-string
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89 (setq article (pop articles))))))
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90 (not (file-directory-p file)))
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91 (insert (format "221 %d Article retrieved.\n" article))
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92 (setq beg (point))
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93 (nnheader-insert-head file)
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94 (goto-char beg)
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95 (if (search-forward "\n\n" nil t)
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96 (forward-char -1)
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97 (goto-char (point-max))
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98 (insert "\n\n"))
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99 (insert ".\n")
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100 (delete-region (point) (point-max)))
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101 (setq count (1+ count))
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102
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103 (and large
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104 (zerop (% count 20))
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105 (message "nnmh: Receiving headers... %d%%"
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106 (/ (* count 100) number))))
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107
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108 (when large
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109 (message "nnmh: Receiving headers...done"))
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110
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111 (nnheader-fold-continuation-lines)
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112 'headers))))
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113
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114 (deffoo nnmh-open-server (server &optional defs)
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115 (nnoo-change-server 'nnmh server defs)
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116 (when (not (file-exists-p nnmh-directory))
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117 (condition-case ()
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118 (make-directory nnmh-directory t)
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119 (error t)))
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120 (cond
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121 ((not (file-exists-p nnmh-directory))
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122 (nnmh-close-server)
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123 (nnheader-report 'nnmh "Couldn't create directory: %s" nnmh-directory))
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124 ((not (file-directory-p (file-truename nnmh-directory)))
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125 (nnmh-close-server)
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126 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory))
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127 (t
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128 (nnheader-report 'nnmh "Opened server %s using directory %s"
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129 server nnmh-directory)
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130 t)))
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131
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132 (deffoo nnmh-request-article (id &optional newsgroup server buffer)
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133 (nnmh-possibly-change-directory newsgroup server)
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134 (let ((file (if (stringp id)
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135 nil
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136 (concat nnmh-current-directory (int-to-string id))))
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137 (nntp-server-buffer (or buffer nntp-server-buffer)))
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138 (and (stringp file)
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139 (file-exists-p file)
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140 (not (file-directory-p file))
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141 (save-excursion (nnmail-find-file file))
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142 (string-to-int (file-name-nondirectory file)))))
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143
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144 (deffoo nnmh-request-group (group &optional server dont-check)
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145 (let ((pathname (nnmail-group-pathname group nnmh-directory))
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146 dir)
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147 (cond
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148 ((not (file-directory-p pathname))
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149 (nnheader-report
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150 'nnmh "Can't select group (no such directory): %s" group))
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151 (t
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152 (setq nnmh-current-directory pathname)
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153 (and nnmh-get-new-mail
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154 nnmh-be-safe
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155 (nnmh-update-gnus-unreads group))
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156 (cond
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157 (dont-check
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158 (nnheader-report 'nnmh "Selected group %s" group)
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159 t)
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160 (t
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161 ;; Re-scan the directory if it's on a foreign system.
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162 (nnheader-re-read-dir pathname)
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163 (setq dir
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164 (sort
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165 (mapcar (lambda (name) (string-to-int name))
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166 (directory-files pathname nil "^[0-9]+$" t))
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167 '<))
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168 (cond
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169 (dir
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170 (nnheader-report 'nnmh "Selected group %s" group)
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171 (nnheader-insert
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172 "211 %d %d %d %s\n" (length dir) (car dir)
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173 (progn (while (cdr dir) (setq dir (cdr dir))) (car dir))
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174 group))
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175 (t
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176 (nnheader-report 'nnmh "Empty group %s" group)
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177 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
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178
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179 (deffoo nnmh-request-scan (&optional group server)
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180 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
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181
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182 (deffoo nnmh-request-list (&optional server dir)
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183 (nnheader-insert "")
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184 (let ((nnmh-toplev
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185 (or dir (file-truename (file-name-as-directory nnmh-directory)))))
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186 (nnmh-request-list-1 nnmh-toplev))
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187 (setq nnmh-group-alist (nnmail-get-active))
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188 t)
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189
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190 (defvar nnmh-toplev)
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191 (defun nnmh-request-list-1 (dir)
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192 (setq dir (expand-file-name dir))
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193 ;; Recurse down all directories.
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194 (let ((dirs (and (file-readable-p dir)
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195 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
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196 (directory-files dir t nil t)))
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197 dir)
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198 ;; Recurse down directories.
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199 (while (setq dir (pop dirs))
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200 (when (and (not (member (file-name-nondirectory dir) '("." "..")))
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201 (file-directory-p dir)
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202 (file-readable-p dir))
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203 (nnmh-request-list-1 dir))))
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204 ;; For each directory, generate an active file line.
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205 (unless (string= (expand-file-name nnmh-toplev) dir)
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206 (let ((files (mapcar
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207 (lambda (name) (string-to-int name))
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208 (directory-files dir nil "^[0-9]+$" t))))
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209 (when files
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210 (save-excursion
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211 (set-buffer nntp-server-buffer)
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212 (goto-char (point-max))
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213 (insert
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214 (format
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215 "%s %d %d y\n"
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216 (progn
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217 (string-match
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218 (regexp-quote
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219 (file-truename (file-name-as-directory
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220 (expand-file-name nnmh-toplev))))
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221 dir)
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222 (nnheader-replace-chars-in-string
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223 (substring dir (match-end 0)) ?/ ?.))
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224 (apply 'max files)
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225 (apply 'min files)))))))
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226 t)
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227
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228 (deffoo nnmh-request-newgroups (date &optional server)
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229 (nnmh-request-list server))
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230
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231 (deffoo nnmh-request-expire-articles (articles newsgroup
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232 &optional server force)
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233 (nnmh-possibly-change-directory newsgroup server)
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234 (let* ((active-articles
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235 (mapcar
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236 (function
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237 (lambda (name)
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238 (string-to-int name)))
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239 (directory-files nnmh-current-directory nil "^[0-9]+$" t)))
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240 (is-old t)
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241 article rest mod-time)
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242 (nnmail-activate 'nnmh)
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243
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244 (while (and articles is-old)
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245 (setq article (concat nnmh-current-directory
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246 (int-to-string (car articles))))
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247 (when (setq mod-time (nth 5 (file-attributes article)))
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248 (if (and (nnmh-deletable-article-p newsgroup (car articles))
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249 (setq is-old
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250 (nnmail-expired-article-p newsgroup mod-time force)))
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251 (progn
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252 (nnheader-message 5 "Deleting article %s in %s..."
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253 article newsgroup)
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254 (condition-case ()
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255 (funcall nnmail-delete-file-function article)
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256 (file-error
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257 (nnheader-message 1 "Couldn't delete article %s in %s"
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258 article newsgroup)
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259 (push (car articles) rest))))
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260 (push (car articles) rest)))
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261 (setq articles (cdr articles)))
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262 (message "")
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263 (nconc rest articles)))
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264
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265 (deffoo nnmh-close-group (group &optional server)
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266 t)
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267
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268 (deffoo nnmh-request-move-article
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269 (article group server accept-form &optional last)
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270 (let ((buf (get-buffer-create " *nnmh move*"))
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271 result)
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272 (and
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273 (nnmh-deletable-article-p group article)
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274 (nnmh-request-article article group server)
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275 (save-excursion
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276 (set-buffer buf)
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277 (erase-buffer)
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278 (insert-buffer-substring nntp-server-buffer)
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279 (setq result (eval accept-form))
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280 (kill-buffer (current-buffer))
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281 result)
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282 (progn
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283 (nnmh-possibly-change-directory group server)
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284 (condition-case ()
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285 (funcall nnmail-delete-file-function
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286 (concat nnmh-current-directory (int-to-string article)))
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287 (file-error nil))))
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288 result))
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289
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290 (deffoo nnmh-request-accept-article (group &optional server last noinsert)
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291 (nnmh-possibly-change-directory group server)
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292 (nnmail-check-syntax)
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293 (if (stringp group)
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294 (and
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295 (nnmail-activate 'nnmh)
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296 (car (nnmh-save-mail
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297 (list (cons group (nnmh-active-number group)))
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298 noinsert)))
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299 (and
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300 (nnmail-activate 'nnmh)
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301 (car (nnmh-save-mail (nnmail-article-group 'nnmh-active-number)
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302 noinsert)))))
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303
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304 (deffoo nnmh-request-replace-article (article group buffer)
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305 (nnmh-possibly-change-directory group)
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306 (save-excursion
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307 (set-buffer buffer)
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308 (nnmh-possibly-create-directory group)
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309 (ignore-errors
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310 (nnmail-write-region
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311 (point-min) (point-max)
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312 (concat nnmh-current-directory (int-to-string article))
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313 nil (if (nnheader-be-verbose 5) nil 'nomesg))
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314 t)))
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315
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316 (deffoo nnmh-request-create-group (group &optional server args)
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317 (nnmail-activate 'nnmh)
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318 (unless (assoc group nnmh-group-alist)
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319 (let (active)
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320 (push (list group (setq active (cons 1 0)))
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321 nnmh-group-alist)
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322 (nnmh-possibly-create-directory group)
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323 (nnmh-possibly-change-directory group server)
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324 (let ((articles (mapcar
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325 (lambda (file)
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326 (string-to-int file))
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327 (directory-files
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328 nnmh-current-directory nil "^[0-9]+$"))))
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329 (when articles
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330 (setcar active (apply 'min articles))
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331 (setcdr active (apply 'max articles))))))
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332 t)
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333
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334 (deffoo nnmh-request-delete-group (group &optional force server)
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335 (nnmh-possibly-change-directory group server)
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336 ;; Delete all articles in GROUP.
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337 (if (not force)
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338 () ; Don't delete the articles.
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339 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
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340 (while articles
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341 (when (file-writable-p (car articles))
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342 (nnheader-message 5 "Deleting article %s in %s..."
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343 (car articles) group)
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344 (funcall nnmail-delete-file-function (car articles)))
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345 (setq articles (cdr articles))))
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346 ;; Try to delete the directory itself.
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347 (ignore-errors
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348 (delete-directory nnmh-current-directory)))
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349 ;; Remove the group from all structures.
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350 (setq nnmh-group-alist
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351 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
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352 nnmh-current-directory nil)
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353 t)
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354
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355 (deffoo nnmh-request-rename-group (group new-name &optional server)
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356 (nnmh-possibly-change-directory group server)
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16
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357 (let ((new-dir (nnmail-group-pathname new-name nnmh-directory))
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358 (old-dir (nnmail-group-pathname group nnmh-directory)))
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359 (when (ignore-errors
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360 (make-directory new-dir t)
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361 t)
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362 ;; We move the articles file by file instead of renaming
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363 ;; the directory -- there may be subgroups in this group.
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364 ;; One might be more clever, I guess.
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365 (let ((files (nnheader-article-to-file-alist old-dir)))
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366 (while files
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367 (rename-file
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368 (concat old-dir (cdar files))
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369 (concat new-dir (cdar files)))
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370 (pop files)))
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371 (when (<= (length (directory-files old-dir)) 2)
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372 (ignore-errors
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373 (delete-directory old-dir)))
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374 ;; That went ok, so we change the internal structures.
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375 (let ((entry (assoc group nnmh-group-alist)))
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376 (when entry
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377 (setcar entry new-name))
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378 (setq nnmh-current-directory nil)
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379 t))))
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380
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381 (nnoo-define-skeleton nnmh)
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0
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382
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383
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384 ;;; Internal functions.
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385
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386 (defun nnmh-possibly-change-directory (newsgroup &optional server)
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387 (when (and server
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388 (not (nnmh-server-opened server)))
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389 (nnmh-open-server server))
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16
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390 (when newsgroup
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391 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory)))
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392 (if (file-directory-p pathname)
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393 (setq nnmh-current-directory pathname)
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394 (error "No such newsgroup: %s" newsgroup)))))
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0
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395
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396 (defun nnmh-possibly-create-directory (group)
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397 (let (dir dirs)
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398 (setq dir (nnmail-group-pathname group nnmh-directory))
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399 (while (not (file-directory-p dir))
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16
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400 (push dir dirs)
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0
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401 (setq dir (file-name-directory (directory-file-name dir))))
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402 (while dirs
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16
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403 (when (make-directory (directory-file-name (car dirs)))
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404 (error "Could not create directory %s" (car dirs)))
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0
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405 (nnheader-message 5 "Creating mail directory %s" (car dirs))
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406 (setq dirs (cdr dirs)))))
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407
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16
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408 (defun nnmh-save-mail (group-art &optional noinsert)
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0
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409 "Called narrowed to an article."
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16
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410 (unless noinsert
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411 (nnmail-insert-lines)
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412 (nnmail-insert-xref group-art))
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413 (run-hooks 'nnmail-prepare-save-mail-hook)
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414 (run-hooks 'nnmh-prepare-save-mail-hook)
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415 (goto-char (point-min))
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416 (while (looking-at "From ")
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417 (replace-match "X-From-Line: ")
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418 (forward-line 1))
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419 ;; We save the article in all the newsgroups it belongs in.
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420 (let ((ga group-art)
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421 first)
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422 (while ga
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423 (nnmh-possibly-create-directory (caar ga))
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424 (let ((file (concat (nnmail-group-pathname
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425 (caar ga) nnmh-directory)
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426 (int-to-string (cdar ga)))))
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427 (if first
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428 ;; It was already saved, so we just make a hard link.
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429 (funcall nnmail-crosspost-link-function first file t)
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430 ;; Save the article.
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431 (nnmail-write-region (point-min) (point-max) file nil nil)
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432 (setq first file)))
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433 (setq ga (cdr ga))))
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434 group-art)
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0
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435
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436 (defun nnmh-active-number (group)
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437 "Compute the next article number in GROUP."
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438 (let ((active (cadr (assoc group nnmh-group-alist))))
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16
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439 (unless active
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440 ;; The group wasn't known to nnmh, so we just create an active
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441 ;; entry for it.
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442 (setq active (cons 1 0))
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443 (push (list group active) nnmh-group-alist)
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444 ;; Find the highest number in the group.
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445 (let ((files (sort
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446 (mapcar
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447 (lambda (f)
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448 (string-to-int f))
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449 (directory-files
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450 (nnmail-group-pathname group nnmh-directory)
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451 nil "^[0-9]+$"))
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452 '>)))
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453 (when files
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454 (setcdr active (car files)))))
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0
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455 (setcdr active (1+ (cdr active)))
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456 (while (file-exists-p
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457 (concat (nnmail-group-pathname group nnmh-directory)
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458 (int-to-string (cdr active))))
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459 (setcdr active (1+ (cdr active))))
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460 (cdr active)))
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461
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462 (defun nnmh-update-gnus-unreads (group)
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463 ;; Go through the .nnmh-articles file and compare with the actual
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16
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464 ;; articles in this folder. The articles that are "new" will be
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0
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465 ;; marked as unread by Gnus.
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466 (let* ((dir nnmh-current-directory)
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467 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
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468 (directory-files nnmh-current-directory
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16
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469 nil "^[0-9]+$" t))
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470 '<))
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0
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471 (nnmh-file (concat dir ".nnmh-articles"))
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472 new articles)
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473 ;; Load the .nnmh-articles file.
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16
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474 (when (file-exists-p nnmh-file)
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475 (setq articles
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476 (let (nnmh-newsgroup-articles)
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477 (ignore-errors (load nnmh-file nil t t))
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478 nnmh-newsgroup-articles)))
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0
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479 ;; Add all new articles to the `new' list.
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480 (let ((art files))
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481 (while art
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16
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482 (unless (assq (car art) articles)
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483 (push (car art) new))
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0
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484 (setq art (cdr art))))
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485 ;; Remove all deleted articles.
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486 (let ((art articles))
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487 (while art
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16
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488 (unless (memq (caar art) files)
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489 (setq articles (delq (car art) articles)))
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0
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490 (setq art (cdr art))))
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16
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491 ;; Check whether the articles really are the ones that Gnus thinks
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492 ;; they are by looking at the time-stamps.
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493 (let ((arts articles)
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494 art)
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495 (while (setq art (pop arts))
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496 (when (not (equal
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497 (nth 5 (file-attributes
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498 (concat dir (int-to-string (car art)))))
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499 (cdr art)))
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500 (setq articles (delq art articles))
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501 (push (car art) new))))
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0
|
502 ;; Go through all the new articles and add them, and their
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|
16
|
503 ;; time-stamps, to the list.
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|
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504 (setq articles
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505 (nconc articles
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506 (mapcar
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|
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507 (lambda (art)
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|
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508 (cons art
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|
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509 (nth 5 (file-attributes
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510 (concat dir (int-to-string art))))))
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511 new)))
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0
|
512 ;; Make Gnus mark all new articles as unread.
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16
|
513 (when new
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514 (gnus-make-articles-unread
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|
|
515 (gnus-group-prefixed-name group (list 'nnmh ""))
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|
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516 (setq new (sort new '<))))
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0
|
517 ;; Sort the article list with highest numbers first.
|
|
16
|
518 (setq articles (sort articles (lambda (art1 art2)
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|
0
|
519 (> (car art1) (car art2)))))
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|
|
520 ;; Finally write this list back to the .nnmh-articles file.
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|
16
|
521 (nnheader-temp-write nnmh-file
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0
|
522 (insert ";; Gnus article active file for " group "\n\n")
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|
|
523 (insert "(setq nnmh-newsgroup-articles '")
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|
16
|
524 (gnus-prin1 articles)
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|
|
525 (insert ")\n"))))
|
|
0
|
526
|
|
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527 (defun nnmh-deletable-article-p (group article)
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|
|
528 "Say whether ARTICLE in GROUP can be deleted."
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|
|
529 (let ((path (concat nnmh-current-directory (int-to-string article))))
|
|
16
|
530 ;; Writable.
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|
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531 (and (file-writable-p path)
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|
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532 ;; We can never delete the last article in the group.
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|
|
533 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
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|
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534 article)))))
|
|
0
|
535
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536 (provide 'nnmh)
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537
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538 ;;; nnmh.el ends here
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